Fluke 5220A - Manuals

vii List of Figures Figure Title Page 5220A Transconductance Amplifier ...................................................................... x 1-1. Outline Drawings ................................................................................................... 1-5 2-1. Controls, Indicators, and...

1-1 Section 1 Introduction and Specifications 1-1. Introduction The Model 5220A is a transconductance amplifier designed to operate as either a standalone unit or an extension of the Fluke Model 5100 Series Calibrator. Functionally, theinstrument operates as a precision ac/dc current source for cali...

5 220A Instruction Manual 1-2 selection switches are inside the 5220A. Refer to Section 4 of this manual for informationon how to properly set the line power switches. Accessories available for use with the 5220A are listed and described in Table 1-1. Therack mounting kits are designed for use with ...

2-1 Section 2 Operating Instructions 2-1. Introduction This section of the manual contains information concerning the installation and operationof the Model 5220A transconductance Amplifier. It is recommended that the contents ofthis section be read and understood before any attempt is made to opera...

5 220A Instruction Manual 2-2 2-4. Fuse Replacement 2-5. AC Line Fuse The ac line fuse is accessible by way of a rear-panel fuse holder located to the left of theinput power connector. If fuse replacement is required, disconnect the 5220A from linepower and remove the fuse cap and fuse (twist the fu...

Operating Instructions Operating Notes 2 2-5 Table 2-1. Controls, Indicators, and Connectors (cont.) Ref. No Name Function 8 Power Connector Provides the means of connecting the 5220A to ac line power by way ofa 3-wire power cord. 9 Fuse Holder Houses the ac line fuse and allows easy access for fuse...

5 220A Instruction Manual 2-6 2-13. Input Voltage Selection, Front/Rear Selection of the front or rear terminals for control voltage input is manually accomplishedby pressing the INPUT push button switch on the front panel. Each depression alternatelyselects front or rear as indicated by the lit FRO...

Operating Instructions Operating Notes 2 2-7 connected to the output before the condition can be cleared. Overcompliance is detectedas an output voltage outside the range of +4 V dc or 3 V rms ac. Output current in excess of 20 A will cause an overcurrent indication. To correct thecondition, the inp...

Operating Instructions Operation 2 2-9 ajs04f.wmf Figure 2-3. Typical Transconductance Error for Inductive Loads 2-20. Operation The following procedure is suggested for operating the 5220A. With reference to theprevious paragraphs proceed as follows: 1. Connect the 5220A to the 5100 Series Calibrat...

5 2 20A Instruction Manual 2-10 7. Determine the active output terminals (front or rear) by connecting a short jumperwire between the front-panel CURRENT OUTPUT terminals and then pressing theOPR/STDBY switch. If the OVERCOMPLIANCE LED lights, the rear outputterminals are active. Otherwise, the OPR ...

3-1 Section 3 Theory of Operation 3-1. Introduction This section of the manual contains an overall functional description followed by adetailed circuit analysis of the 5220A. Both descriptions are supported by blockdiagrams. Component level descriptions contained in the circuit analysis are referenc...

5 220A Instruction Manual 3-4 3-5. Digital Section The logic portion of the 5220A controls the sequencing of input relays (front/rear) andother control signals that turn the transconductance amplifier on and off. It also providesdrive commands to light appropriate front panel status LEDs. Inputs to ...

Theory of Operation Circuit Analysis 3 3-7 the rate at which the input voltage is applied to the A5 Preamplifier when the 5220A isswitched from standby to operate. This is necessary to prevent a step output which, ifapplied to an inductive load, would result in an overvoltage transient, forcing the ...

Theory of Operation Circuit Analysis 3 3-11 it were a logic level. That is, voltages from 0 to an approximate 2 V threshold areconsidered a low logic level. A high logic level is approximately 2 to 4.5 V. The TTL-to-FET level shifters are used to interface turn on/off commands TTL logiclevels, T1 an...

5 220A Instruction Manual 3-14 The shift-right mode is selected when flop-flop U17-1 responds to an operate command(D-input low) and drives the register’s S0 input high and the S1 input low. This results inthe high input at U22-2 being sequentially propagated through the register and its fouroutputs...

5 220A Instruction Manual 3-16 3-19. Failure Status Logic The failure status logic consists of three D-type flip-flop (U16-1, U16-13, and U17-13)and their associated logic gates and drivers. Its function is to store failure conditionsdetected by other parts of the A10 Logic and to drive the front pa...

4-1 Section 4 Maintenance 4-1. Introduction W Warning These servicing instructions are for use by qualified personnelonly. To avoid electric shock, do not perform any servicingother than that contained in the operation instructions unlessyou are qualified to do so. This section of the manual contain...

5 220A Instruction Manual 4-2 4-2. Service Information The 5220A is warranted for a period of 1-year upon delivery to the original purchaser.The warranty is located on the back of the title page. Factory authorized calibration and service for each Fluke product is available at variousworldwide locat...

Maintenance General Maintenance 4 4-3 ajs15f.wmf Figure 4-1. Internal Component/Assembly Locations Caution To prevent component damage observe static awarenessprecautions during instrument disassembly/assembly. Refer tothe yellow insert sheet following Section 1.

5 220A Instruction Manual 4-4 4-7. Internal Components/Assemblies All internal switches, fuses, and calibration adjustments can be accessed by removing thetop cover and the large inner cover from the 5220A. The location of each of theapplicable components is shown in Figure 4-1. Procedures for setti...

Maintenance General Maintenance 4 4-5 4-11. A6 Driver and A7 Output Assembly Removal The A6 Driver and A7 Output PCB Assemblies comprise a plug-in assembly referred toin this procedure as the A6 Driver/A7 Output. Use the following procedure to remove theA6 Driver/A7 Output: 1. Remove the top cover f...

5 220A Instruction Manual 4-6 4-14. Fuse Replacement 4-15. Ac Line Fuse The ac line fuse is accessible by way of a rear-panel fuse holder located to the left of theinput power connector. If fuse replacement is required, disconnect the 5220A from linepower and remove the fuse cap and fuse (twist the ...

Maintenance Performance Test 4 4-9 4-22. Front Panel Tests Use the following procedure to check the operation of the 5220A front-panel controls andLEDs: 1. With the unit in the standby mode, connect jumper wires between the enabled(front/rear) output terminals. Use a 4-inch length of 16-gauge insula...

5 220A Instruction Manual 4-10 4-24. DC Accuracy and Line Regulation The following procedure is used to check the dc accuracy of the 5220A output current: 1. Connect the precision shunt to the enabled output terminals on the 5220A. 2. Connect the DVM to the sense terminals on the precision shunt. Ob...

Maintenance Performance Test 4 4-11 7. Set the 5220A to the standby mode. 8. Disconnect the load resistor and the distortion analyzer from the 5220A outputterminals. 4-26. Frequency Response Note When high ac currents at high frequencies are being used, andminimization of inductive coupling is requi...

Maintenance Calibration Adjustments 4 4-13 4-30. Initial Conditions Before starting the following procedures, condition the 5220A as follows: 1. Disconnect all input and remote connections to the 5220A, and connect a shortjumper wire between the selected output terminals. 2. Connect the unit to line...

Maintenance Replacement of Selected Components 4 4-15 8. Set the 5220A to the standby mode. 9. Disconnect the shunt and voltmeter from the 5220A output terminals. 4-36. Overcurrent Adjustment This procedure is used to adjust the overcurrent trip level of the 5220A. The overcurrentadjustment (R21) is...

5-1 Section 5 List of Replaceable Parts 5-1. Introduction This section contains an illustrated list of replaceable parts for 5220A. Parts are listed byassembly; alphabetized by reference designator. Each assembly is accompanied by anillustration showing the location of each part and its reference de...

6-1 Section 6 Option and Accessory Information 6-1. Introduction This section of the manual documents the options and accessories available for use withthe 5220A. Currently, there are no options, and the accessories are limited to a choice oftwo rack-mounting kits and a precision current shunt for c...

Option and Accessory Information Accessories 6 6-3 6-4. Rack Slide Kit (M00-280-610) The 5220A can be rack mounted in a 24-inch deep equipment rack using the Rack SlideKit, model M00-280-610. Use the following procedure to install the kit: 1. Remove the horizontal side trim decal from both sides of ...