Fluke 2635A - Manual

Contents (continued) v Appendices A Specifications .............................................................................................. A-1 B Crosstalk Considerations ............................................................................ B-1 C Binary Upload of Logged Data ..............

vii List of Tables Table Title Page 1-1. Data Bucket Features ............................................................................................. 1-6 1-2. Options and Accessories ........................................................................................ 1-11 1-3. Front Panel ...

ix List of Figures Figure Title Page 1-1. Data Bucket Front and Rear Panels ....................................................................... 1-7 1-2. Typical Front Panel Display While Scanning ....................................................... 1-8 1-3. Adjusting the Handle .................

xi CAUTION THIS IS AN IEC SAFETY CLASS 1 PRODUCT. BEFORE USING, THE GROUND WIRE IN THELINE CORD OR THE REAR PANEL BINDING POST MUST BE CONNECTED FOR SAFETY. Interference Information This equipment generates and uses radio frequency energy and if not installed and used in strictaccordance with the ma...

xii Safety Terms in this Manual This instrument has been designed and tested in accordance with iec publication 1010,safety requirements for electrical measuring, control and laboratory equipment. This usermanual contains information, warnings, and cautions that must be followed to ensuresafe operat...

Contents (continued) xiii AC Power Source The instrument is intended to operate from an ac power source that will not apply morethan 264v ac rms between the supply conductors or between either supply conductor andground. A protective ground connection by way of the grounding conductor in the powerco...

xiv Ten Minute Tour Introduction Note This manual contains information and warnings that must be followed toensure safe operation and keep the instrument in safe condition. Data Bucket operation and operational features can be understood in about ten minutesby completing the following procedure. Pri...

1-1 Chapter 1 Preparation for Use Title Page Introduction ....................................................................................................... 1-5Operating Modes ............................................................................................... 1-5 Front Panel Operati...

Preparation for Use Introduction 1 1-5 NOTE This manual contains information and warnings that must be followed toensure safe operation and keep the instrument in safe condition. Introduction The Fluke 2635A Hydra Series II Data Bucket is a 21-channel data logging instrumentthat measures and records...

Preparation for Use Operating Modes 1 1-7 COMPLIES WITHFCC-15B + – 0 1 2 3 TR 0 1 2 3 4 5 6 7 Σ 9-16 V DC PWR ! +30V 90-264V 50/60 Hz15VA CAUTION FOR FIRE PROTECTION REPLACE WITH T 1/8A 250V (SLOW) FUSE ALARM OUTPUTS DIGITAL I/O MEETS Vfg. 243/1991 RS-232C GND DTR TX RX IEEE STD-488 PORT SH1, AH1, T...

2635A Users Manual 1-8 personal computer (PC), where data can be sent from the Data Bucket to the PC over anRS-232 link (up to a 38,400 baud rate), or the card can be removed and taken to a PCequipped with a memory card reader (see Options and Accessories). Memory cardoperations are discussed in Cha...

Preparation for Use Measurement Capabilities 1 1-9 Measurement Capabilities Before scanning is enabled, the Data Bucket channels are configured for measuring theselected electrical or physical parameter (volts dc, volts ac, temperature, etc.). Readingshave five digits of resolution, for example, 15....

2635A Users Manual 1-10 An extensive command set allows the user to develop custom software in GWBASIC,QBASIC, and QuickC. The command set is discussed in Chapter 4. Hydra Starter Package Starter is a DOS based, menu-driven software package used to transfer configurationdata from and to the instrume...

Preparation for Use Setting Up the Instrument 1 1-11 Table 1-2. Options and Accessories MODEL DESCRIPTION 2635A-901 Hydra Logger Software (Windows) 2635A-902 Hydra Logger Software with Trending (includes 2640A-904) 2640A-904 Trend Link for Fluke Software 2620A-100 I/O Connector Set; includes Univers...

2635A Users Manual 1-12 • Line power cord • Type "T" Thermocouple • 256K-byte Memory Card Carefully remove the instrument from its shipping container and inspect the instrumentfor possible damage or missing items. If the instrument is damaged or anything ismissing, contact the place of purch...

Preparation for Use Setting Up the Instrument 1 1-13 COMPLIES WITHFCC-15B + – 0 1 2 3 TR 0 1 2 3 4 5 6 7 Σ 9-16 V DC PWR ! +30V 90-264V 50/60 Hz15VA CAUTION FOR FIRE PROTECTION REPLACE WITH T 1/8A 250V (SLOW) FUSE ALARM OUTPUTS DIGITAL I/O MEETS Vfg. 243/1991 RS-232C GND DTR TX RX IEEE STD-488 PORT ...

2635A Users Manual 1-14 Caution Do not exceed the specified input voltage levels or equipmentdamage could result. Measurement Connections W Warning To avoid electric shock: • When the input module is installed, consider all channels with connections as accessible terminals that may behazardous live....

Preparation for Use Measurement Connections 1 1-15 L H L H L H H L H L H L H L H L H L H L H L L H L H H L H L H L H L H L H L H L H L H L H L H L H L H L H L H L H L H L H L H L H L H L H L H L H L H L H L H L STRAIN RELIEF 1 11 2 12 3 13 4 14 5 15 6 16 7 17 8 18 9 19 10 20 op05f.eps Figure 1-5. Un...

Preparation for Use Measurement Connections 1 1-17 Alarm Outputs Connections The eight-terminal rear panel ALARM OUTPUTS connector (Figure 1-7) serves threefunctions: DC power, alarm outputs, and external trigger input. Each is described below. 9-16 V DC PWR ALARM OUTPUTS + – 0 1 2 3 TR Terminal +–0...

2635A Users Manual 1-18 2. Loosen the wire clamp screw for the associated terminal. 3. Feed the wire into the gap between the connector body and the wire clamp. 4. Tighten the wire clamp screw. 5. Insert the connector in the rear panel. Digital I/O Connections The ten-terminal rear panel DIGITAL I/O...

Preparation for Use Controls and Indicators 1 1-19 4. Tighten the wire clamp screw. 5. Insert the connector in the rear panel. Controls and Indicators The front panel (Figure 1-1) provides a multipurpose display and a set of control keys.Each is described in the following paragraphs. Front Panel Con...

Preparation for Use Controls and Indicators 1 1-21 Table 1-3. Front Panel Keys Description Key Description F Calls up the menu to set the function for the channel A Calls up the menu to set alarm limits S and T for the channel. B Calls up the menu to set scaling on the channel. C Used to exit any se...

2635A Users Manual 1-22 Table 1-3. Front Panel Keys Description (cont.) Key Description CLEAR K N This key sequence clears the entire contents of the Review array. Review datamust be presently shown on the display to clear the array. LOCAL K When under remote control without lockout (REMS), this ret...

2-1 Chapter 2 Front Panel Operations Title Page Summary of Front Panel Operations ................................................................. 2-5Configuring the Instrument for Operation......................................................... 2-6 Turning the Power on..............................

Front Panel Operations Summary of Front Panel Operations 2 2-3

2635A Users Manual 2-6 Configuring the Instrument for Operation To prepare the equipment for front panel operations, perform the two followingprocedures: • Turning the Power On (Figure 2-2) • Selecting a Channel (Figure 2-3) Turning the Power on There are four power-on options. Figure 2-2 describes ...

2635A Users Manual 2-8 Selecting a Channel There are 21 channels, 0 to 20. A channel is selected for configuration or configurationverification when the instrument is in the inactive mode. An active channel is selectedfor monitoring when the instrument is in the Monitor Mode (see Figure 2-17) or Rev...

Front Panel Operations Configuring a Measurement Channel 2 2-9 • Configuring a Channel to Measure Temperature (Thermocouples) (Figure 2-8) • Configuring a Channel to Measure Temperature (RTDs) (Figure 2-9) • Configuring a Channel Off (Figure 2-10) The instrument is protected from channel configurati...

2635A Users Manual 2-10 Configuring a Channel to Measure AC Volts Perform the procedure in Figure 2-5 to configure a channel for measuring ac volts. Inpreparation, the instrument must be in the inactive mode (not scanning or monitoring)and the desired channel must be selected (see Figure 2-3). To ex...

Front Panel Operations Configuring a Measurement Channel 2 2-11 Configuring a Channel to Measure Resistance Perform the procedure in Figure 2-6 to configure a channel for measuring resistance. Inpreparation, the instrument must be in the inactive mode (not scanning or monitoring)and the desired chan...

2635A Users Manual 2-12 Configuring a Channel to Measure Frequency Perform the procedure in Figure 2-7 to configure a channel for measuring frequency. Inpreparation, the instrument must be in the inactive mode (not scanning or monitoring)and the desired channel must be selected (see Figure 2-3). To ...

Front Panel Operations Configuring a Measurement Channel 2 2-13 Configuring a Channel to Measure Temperature Perform the procedure in Figure 2-8 to configure a channel for measuring temperaturewith thermocouples, or Figure 2-9 to measure temperature with resistance-temperaturedetectors (RTDs). In pr...

2635A Users Manual 2-16 Configuring a Channel Off Perform the procedure in Figure 2-10 to configure a channel for off (no measurement).In preparation, the instrument must be in the inactive mode (not scanning or monitoring)and the desired channel must be selected (see Figure 2-3). To exit at any tim...

Front Panel Operations Setting Operating Conditions 2 2-17 Setting the Scan Interval Perform the procedure in Figure 2-11 to set the time between starts of measurementscans. In preparation, the instrument must be in the inactive mode (not scanning ormonitoring). To exit at any time (changes not save...

2635A Users Manual 2-18 Setting the Measurement Rate Perform the procedure in Figure 2-12 to set a fast or slow [default] measurement rate.The measurement rate affects the time required to scan the configured channels.However, the fast mode sacrifices one digit of measurement resolution. For example...

Front Panel Operations Setting Operating Conditions 2 2-19 Alarm Indications While Monitoring If the channel being monitored is in an alarm condition, the alarm limit 1 and/or 2annunciators will be turned on, and the ALARM annunciator blinks bright/dim. Thealarm limit annunciator indicates which ala...

2635A Users Manual 2-20 Table 2-4. TLL Alarm Outputs (Channels 0 to 3) Channel 3 Channel 2 Channel 1 Channel 0 Decimal 0 (Alarm) 0 (Alarm) 0 (Alarm) 0 (Alarm) 0 0 0 0 1 (No Alarm) 1 0 0 1 (No Alarm) 0 2 0 0 1 1 3 0 1 (No Alarm) 0 0 4 0 1 0 1 5 0 1 1 0 6 0 1 1 1 7 1(No Alarm) 0 0 0 8 1 0 0 1 9 1 0 1 ...

Front Panel Operations Setting Operating Conditions 2 2-23 Setting the Mx+B Scaling Perform the procedure in Figure 2-14 to set the Mx+B scaling for any configuredchannel. In preparation, the instrument must be in the inactive mode (not scanning ormonitoring) and the desired channel must be configur...

2635A Users Manual 2-26 Operating Modes With the channels configured and operating conditions set, the instrument is ready foroperation in one of the following modes: • Using the Scan Mode (Figure 2-15) • Using the Monitor Mode (Figure 2-17) • Using the Review Mode (Figure 2-18) Each operating mode ...

Front Panel Operations Operating Modes 2 2-27 3/bAd is displayed (see Figure 2-16). Err4/bAd indicates the internal memory is full,saving only the most recent 75 scans. The new card is updated with the scans in memory. Memory Card Data Extraction Measurement data recorded onto a memory card can be r...

2635A Users Manual 2-28 Memory Card Error Messages Any illegal memory card operation results in a double "beep" and an error display asshown in Figure 2-16. If the instrument is scanning and in the Monitor Mode or ReviewMode, only the double beep will be heard for a memory card error. Error ...

Front Panel Operations Operating Modes 2 2-29 Using the Monitor Mode Perform the procedure in Figure 2-17 to start and stop the Monitor Mode of operation.The Monitor Mode can be started when the instrument is in the inactive mode or in theScan Mode. The Monitor Mode commands the instrument to displa...

2635A Users Manual 2-30 Using the Review Mode Perform the procedure in Figure 2-18 to operate the Review Mode of operation. TheReview Mode is used any time during or after operation of the Scan Mode. While theinstrument is in the Scan Mode, the last, maximum, and measurements for each scannedchannel...

Front Panel Operations Additional Features 2 2-31 Additional Features The following additional features allow the instrument to serve in a variety ofapplications: • Scan Triggering Options (Figure 2-19) • Totalizer Operation (Figure 2-20) • Digital Input/Output Lines • Setting Date and Time (Figure ...

2635A Users Manual 2-32 Typical Required TRIg ENTER Selecting a Trigger Option. Press the SHIFT key and then the MON key to access the trigger option menu. Press the up/down arrow keys to select either ALAr (Alarm) (Monitor-Alarm trigger), On (On) (External trigger), or OFF (Off) (no trigger option ...

Front Panel Operations Additional Features 2 2-33 totAL SHIFT TOTAL TOTAL TOTAL XXXXX totAL TOTAL TOTAL XXXXX totAL 0 Reading the Totalizer Count. Press the TOTAL key to view the contents of the totalizer counter. The maximum count is 65535. If the maximum count is exceeded, the display will show OL...

2635A Users Manual 2-34 Setting Date and Time Perform the procedure in Figure 2-21 to set the instrument internal clock and calendar,which must be correct since measurements are tagged with this time and date. The built-in clock accuracy is a nominal one minute per month. Once set to the correct dat...

Front Panel Operations Additional Features 2 2-35 Reading Instrument Software Versions Perform the procedure in Figure 2-22 to view the version of the internal software that iscontrolling the instrument’s operation. Two software versions are identified with thisprocedure: the main software that oper...

2635A Users Manual 2-36 Front Panel Key Lockout Options Perform the procedure in Figure 2-24 to lockout the front panel key functions. There arethree lockout features: • Monitor Mode Lockout • Review Mode Lockout A third lockout can be enabled only from the computer interface (see the LOCK 3command ...

Front Panel Operations Instrument Interfaces 2 2-37 RS-232 Computer Interface The Computer Interface is described in detail in Chapter 4, "Computer Operations." Using the RS-232 Computer Interface With a Printer The Printer Interface is described in detail in Chapter 5, "Printer Operatio...

3-1 Chapter 3 Memory Card Operations Title Page Summary of Memory Card Operations ............................................................. 3-3 Memory Card Files ....................................................................................... 3-3Setup Files ..................................

Memory Card Operations Summary of Memory Card Operations 3 3-3 Summary of Memory Card Operations Memory card operations use a small, lightweight memory card (Figure 3-1) to save andload setup files (instrument configurations) and to record measurement data duringscanning. The memory card consists of...

2635A Users Manual 3-4 Setup Files When the front panel controls have been used to configure channels for a particularinstrument application, including type of measurement, alarms, scaling, rate, and allother operating parameters, this configuration can be saved as a SEtxx files. If this is thefirst...

Memory Card Operations Inserting and Removing the Memory Card 3 3-5 Memory Card Battery A typical SRAM is powered by an internal lithium 3-volt battery that has a minimum lifeof five years for a 256K-byte card, and two years for a 1M-byte card. If the batteryvoltage falls below 2.75 volts, the front...

Memory Card Operations Initializing a Memory Card 3 3-7 Initializing a Memory Card Perform the procedure in Figure 3-3 to initialize (format) a memory card. Memory cardscan also be formatted at a PC if it is equipped with a memory card reader. (Formatting ata PC uses the format utility supplied with...

2635A Users Manual 3-8 Recording Measurement Results During Scanning Perform the procedure in Figure 3-4 to record measurement results onto the memorycard. The destination for the scanned data can be the memory card, printer, both thememory card and printer, or no destination, where the results are ...

Memory Card Operations Setup File Procedures 3 3-9 Setup File Procedures Perform the following procedures to LOAD, STORE, and ERASE memory cardinstrument configuration (SEtUP) files. Using Setup Store Perform the procedure in Figure 3-5 to save the current instrument configuration. Thecommunication ...

2635A Users Manual 3-10 Using Setup Load Perform the procedure in Figure 3-6 to discard the current instrument configuration andload a configuration saved in a previous SETUP STORE operation (Figure 3-5). Aconfiguration file includes channel configurations, scan interval, measurement rate,alarms, Mx...

Memory Card Operations Setup File Procedures 3 3-11 Using Setup Erase Perform the procedure in Figure 3-7 to remove a setup file from the memory card.Removing a file does not interrupt the sequential SEtxx file names assigned with theSEtUP STORE command. When SEt99 is reached, the instrument loops b...

2635A Users Manual 3-12 Data File Procedures Perform the following procedures to OPEN, LOAD, STORE, and ERASE memory cardinstrument data (DATA) files. Using Data Open Perform the procedure in Figure 3-8 to open a data file in preparation for recordingmeasurement data to the memory card. This procedu...

Memory Card Operations Data File Procedures 3 3-13 Using Data Erase Perform the procedure in Figure 3-9 to remove a data file from the memory card.Removing a file does not interrupt the sequential dAtxx file names assigned with theDATA OPEN command. When dAt99 is reached, the instrument will loop ba...

2635A Users Manual 3-14 Setup and Data Files Directory Perform the procedure in Figure 3-10 to obtain a directory of existing SEtxx files anddAtxx files that exist on the memory card, plus the remaining capacity of the card. Thesize of the selected file is given in the front panel display in K-bytes...

Memory Card Operations Setup and Data File Current Status 3 3-15 Setup and Data File Current Status Perform the procedure in Figure 3-11 to display the status of the memory card SEtxx anddAtxx files that are currently in effect or were in effect for the most recent scan. The xxportion of the file na...

2635A Users Manual 3-16 Memory Card File Operations to and from a PC All memory card file transfers to and from the instrument are controlled at the PC.Nothing is required at the instrument end, except to have the RS-232 link operatingcorrectly (see Chapter4, "Computer Operations") and havin...

4-1 Chapter 4 Computer Operations Title Page Summary of Computer Operations .................................................................... 4-3Connecting the Instrument to a PC.................................................................... 4-3Configuring the Instrument for Computer Operati...

Computer Operations Summary of Computer Operations 4 4-3 Summary of Computer Operations Computer operations allow the instrument to be configured and controlled from apersonal computer (PC), including data exchanges with the instrument memory card.The computer interface is via an RS-232 link between...

Computer Operations Configuring the Instrument for Computer Operations 4 4-5 Configuring the Instrument for Computer Operations Correct operation of the interface between the instrument and PC depends on the baudrate, parity, CTS (Clear To Send) and echo of the RS-232 interface parameters. Performth...

2635A Users Manual 4-6 Configuring the PC for Computer Operations Operation of the instrument from a PC always involves software, either softwaresupplied with the instrument (Starter) or software developed by the user (GWBASIC,QBASIC or Quick C). Since the PC COM port is set up by the operating soft...

Computer Operations Testing the Instrument/PC RS-232 Interface 4 4-7 Mn.n identifies the main software version. An.n identifies the analog-to-digital converter software version. Dn.n identifies the display software version. Ln.n identifies the programmable gate-array configuration version. 6. Other ...

Computer Operations Testing the Instrument/PC RS-232 Interface 4 4-9 ALM:15 DIO:255 TOTAL:0 To decode the printout, see Figure 5-3. The commands in the above example can be combined into a single entry by usingthe semicolon separator character: *RST;FUNC 0,VDC,4;PRINT_TYPE 0,0;PRINT 1;*TRG. 6. One o...

2635A Users Manual 4-10 One of the following three possible prompts are returned when a command is sent tothe instrument: => The command was executed [Example, PRINT 1]. !> The command was recognized, but not executed [Example, PRINT 3, where only PRINT 0 and PRINT 1 are legal entries]. ?> ...

2635A Users Manual 4-12 PRINT #1, "*RST;FUNC 0,VDC,4;PRINT_TYPE 0,0;PRINT 1;*TRG":PRINTINPUT$(124, #1) If other commands are entered, remember that the input character count xxx for PRINT INPUT$(xxx, #1) command must be exact. A number too small will not read all the characters and will leav...

Computer Operations Computer Interface Commands and Operation 4 4-13 instances, a terminator is automatically transmitted by the host at the end of thecommand string, for example, commands entered in BASIC. Input String Examples Below are four input string examples. Example 1 - Select function for c...

2635A Users Manual 4-14 Positive overload (OL on display) returns +001.00E+9 Negative overload (-OL on display) returns -001.00E+9 Open thermocouple (otc on display) returns +009.00E+9 Status Registers Internal instrument operation is summarized in three data registers, which can beaccessed to deter...

2635A Users Manual 4-18 For example, an STB byte of binary 00100000 (decimal 32) indicates an Event StatusBit. If the SRE register is set to binary 00100000 (using the command *SRE 32), then anEvent Status Bit will cause the Logical OR gate to output a logic high, whichautomatically sets bit 6 to hi...

5-1 Chapter 5 Printer Operations Title Page Summary of Printer Operations ......................................................................... 5-3Connecting the Instrument to a Printer.............................................................. 5-3Configuring for Printer Operations .............

Printer Operations Summary of Printer Operations 5 5-3 Summary of Printer Operations Printer operations allow an RS-232 connection between the instrument and a printer toprint out measurement results during scanning, the Review array, and a directory of thememory card files. The printer must accept ...

Printer Operations Configuring for Printer Operations 5 5-5 Configuring for Printer Operations Correct operation of the instrument RS-232 link with a printer depends on the linkparameters baud rate, parity, and CTS (Clear To Send). Perform the procedure in Figure5-3 to establish communication link p...

2635A Users Manual 5-6 Printing Measurement Data and Memory Card Directory An RS-232 link between the instrument and a printer allows printing of the followingdata: • Printing Measurement Results During Scanning (Figure 5-3) • Printing the Review Array (Figure 5-4) • Printing the Memory Card Directo...

2635A Users Manual 5-8 Printing the Review Array Perform the procedure in Figure 5-4 to print the Review array, which consists of the last,maximum, and minimum measurement values during the last scan, and previous scans ifthe instrument configuration has not changed or the review array cleared. If t...

Printer Operations Printing Measurement Data and Memory Card Directory 5 5-9 Printing the Directory of the Memory Card Perform the procedure in Figure 5-5 to print the directory of the memory card files. Theformat is similar to a PC directory for a disk drive and will print any files that exist onth...

6-1 Chapter 6 Modem Operations Title Page Summary of Modem Operations ....................................................................... 6-3Connecting the Modem to a PC for Modem Configuration .............................. 6-4Configuring the Instrument Modem for Modem Operations .................

Modem Operations Summary of Modem Operations 6 6-3 Summary of Modem Operations Modem operations allow an RS-232 connection between an instrument and a PC viamodems and telephone lines, instead of a direct RS-232 connection as described inChapter 4, "Computer Operations." Due to the wide vari...

2635A Users Manual 6-4 Connecting the Modem to a PC for Modem Configuration The two most common configurations for connecting the modem to a PC are shown inFigure 6-2. The modem RS-232 port (DB-25 connector) is cabled to a PC serial COMport that uses either a DB-9 connector or DB-25 connector. The c...

Modem Operations Configuring the Instrument Modem for Modem Operations 6 6-5 RS-232 (DB-9) (MALE) FLUKE RS41 CABLE (OR EQUAL) MODEM CONNECTION WITH PC DB-9 CONNECTOR RS-232 PORT (DB-25) (FEMALE ) MODEM HS AA CD OH RD TD TR MR FLUKE RS41 CABLE (OR EQUAL) MODEM CONNECTION WITH PC DB-25 CONNECTOR RS-23...

2635A Users Manual 6-6 Connecting the Modem to an Instrument Remove the cable from the PC and connect to the Data Bucket, as shown in Figure 6-3.If a different cable is used, be sure it is a modem cable. RS-232 (DB-9) (MALE) RS-232 PORT (DB-25) (FEMALE ) HYDRA MODEM HS AA CD OH RD TD TR MR HS AA CD ...

Modem Operations Configuring the Instrument for Modem Operations 6 6-7 Configuring the Instrument for Modem Operations Correct operation of the instrument RS-232/modem link depends on the baud rate,parity, CTS (Clear To Send), and Echo of the link parameters Perform the procedure inFigure 6-4 to est...

7-1 Chapter 7 Maintenance Title Page Introduction ....................................................................................................... 7-3Cleaning............................................................................................................. 7-3Line Fuse ...............

Maintenance Introduction 7 7-3 Introduction This chapter describes basic maintenance that the instrument user can perform. Do notattempt any maintenance not described in this chapter. For additional maintenance,service, and calibration procedures, qualified service personnel can refer to the HydraSe...

2635A Users Manual 7-4 Selftest Diagnostics and Error Codes When the instrument is powered up, the entire display lights. Note To hold the display fully lit, press and hold the K key, then press R ON and wait a moment for the instrument to beep. Then release K . The entire display will now stay on u...

Maintenance Performance Tests 7 7-7 Accuracy Verification Test 1. Power up the instrument and allow the temperature to stabilize for 30 minutes. 2. Connect a cable from the Output VA HI and LO connectors of the 5700A to the V Ω and COM connectors on the front panel of the Hydra Series II. Select the...

2635A Users Manual 7-8 Table 7-3. Performance Tests (Voltage, Resistance, and Frequency) (cont) Using inputs in decades of 1.9: 300 e short 0.00 0.09 190 e 189.93 190.12 3 k e short 0.0000 0.0003 1.9 k e 1.8992 1.9008 30 k e 19 k e 18.992 19.008 300 k e 190 k e 189.91 190.09 3 M e 1.9 M e 1.8983 1.9...

Maintenance Performance Tests 7 7-9 5. For channel 1, select the two-terminal ohms function and 300 ohms range on theHydra Series II. Press M and ensure the display reads a resistance of less than or equal to 4.0 ohms. (This test assumes that lead wire resistances are less than 0.1 Ω .) 6. Open the ...

2635A Users Manual 7-10 The value returned should now be 90 mV ±0.028 mV (between 89.97 and90.028 mV). 6. Change Hydra Series II's channel 0 function to the internal 900 mV dc range byredefining channel 0. Send the following commands: MON 0 <CR> FUNC 0,VDC,6 <CR> Set the 5700A to output ...

Maintenance Performance Tests 7 7-11 Note If other than a T-type thermocouple is used, be sure that the instrument isset up for the type of thermocouple used. 3. Reconnect power and switch the instrument ON. 4. Insert the thermocouple and a mercury thermometer in a room temperature bath.Allow 20 min...

Maintenance Performance Tests 7 7-13 RTD Temperature Accuracy Test The following two RTD Temperature Accuracy Tests are different in that one test uses aDecade Resistance Source and the other uses an RTD. Only one of the tests need to beperformed to assure operation. RTD Temperature Accuracy Test (U...

Maintenance Performance Tests 7 7-15 Note Four-terminal connections are made using pairs of channels. Four-terminal measurements can be made only on channels 1 though 10 (n).Their accompanying pairs are channels 11 through 20 (n+10). 3. Switch the instrument ON. 4. Insert the RTD probe and a mercury...

2635A Users Manual 7-16 5. Using a digital multimeter (DMM), verify that all digital outputs (0-7) are in theOFF or HIGH state. This is done by connecting the low or common of themultimeter to the ground test lead and the high of the multimeter to the digital outputand verifying a voltage greater th...

Maintenance Performance Tests 7 7-17 Send the command: DIO_LEVELS? <CR> Verify the returned value is 253. 5. Repeat step 4 for each input and verify the correct returned value (See Table 7-7). Table 7-7. Digital Input Values TERMINAL GROUNDED STATE OF DIGITAL INPUTS DECIMAL VALUE none inputs 0...

2635A Users Manual 7-18 8. Again in sequence, send the commands: DO_LEVEL 0,0 <CR> DO_LEVEL 0,1 <CR> Hydra Series II should now display a totalizer count of 2. 9. Repeat step 8 for each incremental totalizing count. 10. Set the Hydra Series II’s totalized count to a value near full range...

Maintenance Performance Tests 7 7-19 3. Remove the Input Module from the rear of Hydra Series II. Open the Input Moduleand jumper the H (high) terminal of channels 1, 2, and 3 together. Connect a testlead to the H of channel 1. Also jumper the L (low) terminals of channel 1, 2, and 3together. Connec...

Maintenance Calibration 7 7-21 External Trigger Input Test The External Trigger Input Test verifies that the rear panel trigger input of Hydra SeriesII is functioning properly. 1. Switch OFF power to the instrument and disconnect all high voltage inputs. 2. Remove the Alarm Output eight terminal con...

2635A Users Manual 7-22 no parts to disassemble, no mechanical adjustments to make, and the instrument can becalibrated by an automated instrumentation system. The instrument should normally be calibrated on a regular cycle, typically every 90 daysor 1 year. The chosen calibration cycle depends on t...

Appendices Appendix Title Page A Specifications....................................................................................................... A-1 B Crosstalk Considerations ..................................................................................... B-1 C Binary Upload of Logged Da...

A-1 Appendix A Specifications Introduction The instrument specifications presented here are applicable within the conditions listedin the Environmental chapter. The specifications state total instrument accuracy following calibration, including: • A/D errors • Linearization conformity • Initial cali...

2635A Users Manual A-2 Table A-1. DC Voltage Measurements - Resolution Range Resolution Slow Fast 90 mV* 1 µV 10 µV 300 mV 10 µV 0.1 mV 3V 0.1 mV 1 mV 30V 1 mV 10 mV 300V 10 mV 0.1 V 900 mV** 10 µV 0.1 mV * Not used in Autoranging *** Computer interface only (see FUNC command). Accuracy See Table A-...

Appendices Specifications A A-3 Maximum Input 300V dc or ac rms on any range for channels 0,1, and 11150V dc or ac rms for channels 2 to 10 and 12 to 20Voltage ratings between channels must not be exceeded. Cross-Talk Rejection Refer to Appendix B.

Appendices Specifications A A-7 Input Impedance 100 M Ω minimum in parallel with 150 pF maximum Common Mode and Normal Mode Rejection See the specifications for dc voltage measurements. Cross-Talk Rejection Refer to Appendix B. Open Thermocouple Detect Small ac signal injection and detection scheme ...

2635A Users Manual A-8 Table A-9. Temperature Measurements - Accuracy (RTDs) (IEC751) (IPTS-68) 4-Wire Accuracy* (±°C) RTD Resolution 18°C to 28°C 0°C to 60°C Temperature (°C) Slow Fast 90 Day Slow 1 Year Slow 1 Year Fast 1 Year Slow 1 Year Fast -200.00 0.02 0.1 0.11 0.11 0.53 0.12 0.54 0.00 0.02 0....

2635A Users Manual A-10 Maximum Voltage Input VS. Frequency Input See Table A-12. Table A-12. AC Voltage Measurements Frequency Maximum Input at Upper Frequency 20 Hz - 50 Hz 300V rms 50 Hz - 100 Hz 300V rms 100 Hz - 10kHz 200V rms 10 kHz - 20 kHz 100V rms 20 kHz - 50 kHz 40V rms 50 kHz - 100 kHz 20...

Appendices Specifications A A-11 Resistance Measurements Resolution See Table A-13. Table A-13. Resistance Measurements - Resolution. Range Resolution Typical Full Scale Voltage Maximum Current Through Unknown Maximum Open Circuit Voltage Slow Fast 300 Ω 10 m Ω 0.1 Ω 0.22V 1 mA 3.2V 3 k Ω 0.1 Ω 1 Ω ...

2635A Users Manual A-12 2-Wire Accuracy Add 4.0 Ω to accuracy specifications for channels 1 to 20, and add 20 m Ω for channel 0. Lead wire resistances are not included. 300V dc or ac rms on all ranges Cross-Talk Rejection Refer to Appendix B. Frequency Measurements Resolution and Accuracy See Table ...

Appendices Specifications A A-13 Maximum AC Input 300V rms or 424V peak on channels 0, 1, and 11150V rms or 212V peak on channels 2 to 10 and 12 to 20Voltage ratings between channels must not be exceeded 2 x 10 6 Volt-Hertz product on any range, normal mode input 1 x 10 6 Volt-Hertz product on any r...

2635A Users Manual A-14 Maximum Autoranging Time See Table A-18 (shown in seconds per channel). Totalizing Input Input Voltage 30V maximum 4V minimum 2V peak minimum signal Isolation None dc-coupled Table A-18. Autoranging Rates Function Range Change Slow Fast VDC 300 mV ----------------------------...

Appendices Specifications A A-15 Input Voltage 30V maximum -4V minimum Isolation none dc-coupled Threshold 1.4V Hysteresis 500 mV Trigger Inputs Input Voltages contact closure and TTL compatible“high” =2.0V min, 7.0V max“low” = -0.6V min, 0.8V max Isolation Nonedc-coupled Minimum Pulse Width 5 µs Ma...

2635A Users Manual A-16 Digital and Alarm Outputs The specifications for the digital and alarm outputs are provided in the followingparagraphs. Output Logic Levels Logical “zero”: 0.8V max for an Iout of -1.0 mA (1LSTTL load) Logical “one”: 3.8V min for an Iout of 0.05 mA (1LSTTL load) For non-TTL l...

Appendices Specifications A A-17 Relative Humidity (Non-Condensing) 90% maximum for 0°C to 28°C75% maximum for 28°C to 35°C50% maximum for 35°C to 50°C35% maximum for 50°C to 60°C(Except 70% maximum for 0°C to 35°C, 0% maximum for 40°C to 50°C, and 20%maximum for 50°C to 60°C for the 300 k e , 3 M e...

2635A Users Manual A-18 Voltage Ratings Channels 0,1, and 11 are rated at 300V dc or ac rms maximum from a channel terminalto earth and from a channel terminal to any other channel terminal. Channels 2 to 10 and 12 to 20 are rated at 150V dc or ac rms maximum from a channelterminal to any other chan...

B-1 Appendix B Crosstalk Considerations Introduction This appendix augments the discussion of ac signal effects on other channels (crosstalk).Effects on each measurement function are discussed below. These numbers should onlybe considered as references. Since cross talk can be introduced into a meas...

2635A Users Manual B-2 AC Signal Cross Talk into an AC Voltage Channel ACV Error Ratio = VACrms error VACrms crosstalk Frequency crosstalk ( ) ( ) ( ) ×     Range Ratio (worst case) Ratio (typical) 300.00 m 4.8 × 10 -8 v v Hz ×   1.4 × 10 -8 v v Hz ×   3.0000 V 1.1 × 10 -7 v v Hz ×...

Appendices Crosstalk Considerations B B-3 10.000 M e 1.4 × 10 -3 MOhms Vrms   4.3 × 10 -4 MOhms Vrms   For example, to find the typical effect of a 60 Hz, 100V ac signal on another channel forthe 30 k Ω range, you would calculate: 100 X 8.4 X 10-5 = 0.008 k Ω . 1 These values assume no m...

C-1 Appendix C Binary Upload of Logged Data Introduction The LOG_BIN? <index> query can be used to quickly upload logged data from a 2635A.The response is a single ASCII string, which encodes the raw binary data stored at thespecified <index> position. The logged data is also retained in...

2635A Users Manual C-4 byte6: temperature units and rate (0x10 bit means degrees Fahrenheit, else Centigrade; 0x01 bit means fast rate, else slow rate) byte7: Alarm outputs byte8: Digital I/O • Totalizer value as 32-bit single-precision IEEE floating point number stored usingthe byte ordering shown ...

Appendices Binary Upload of Logged Data C C-7 Example Figure C-3 is a short example that uses the routines in Figures C-1 and C-2 to decode afixed (pre-computed) LOG_BIN? response string. When compiled and run on an Intel architecture computer, the program should print"Conversion worked". Al...

D-1 Appendix D RS-232 Cabling Introduction This appendix details the RS-232 cabling between the instrument and a PC, instrumentcontroller (Fluke 17XXA series), printer, or modem. All connections can be made usingthe Fluke RS-series of cables (see Options and Accessories in Chapter 1). RS-232 cabless...

F-1 Appendix F Memory Card File Formats Introduction This appendix contains a description of the format of the binary files created by the2635A Data Bucket. This information is intended to describe the contents in enoughdetail to allow someone well versed in a software programming language to use th...

G-1 Appendix G True RMS Measurements Introduction The instrument measures the true value of ac voltages. In physical terms, the rms (root-means-square) value of a waveform is the equivalent dc value that causes the sameamount of hear to be dissipated in a resistor. True rms measurement greatly simpl...

Hydra Configuration Record SET-UP NAME_________________________________________ DATE_________________________ SCAN RATE: q Slow TEMPERATURE UNITS q °C q °F q Fast RS-232-C COMMUNICATION SCAN INTERVAL:_______ :_______: _______ Baud Rate q 38400 q 19200 q 9600 q 4800 q 2400 q 1200 q 600 q 300 OUTPUT: ...

Hydra Memory Card Record DATA FILES SET-UP FILES DATxx Application Note SETxx Application Note

1 Index —2— 2-wire accuracy, A-8, A-12 —A— AC operation, 1-13Ac signal cross talk in a dc voltage channel, B-1Ac signal cross talk into a frequency channel, B-3 Ac signal cross talk into an ac voltage channel, B-2 Ac signal cross talk into an ohms channel, B-2Ac signal crosstalk into a temperature c...