Fluke 1521 - Manuals

Symbol Description Canadian Standards Association OVERVOLTAGE (Installation) CATEGORY II, Pollution Degree 2 per IEC1010-1 re-fers to the level of Impulse Withstand Voltage protection provided. Equipment ofOVERVOLTAGE CATEGORY II is energy-consuming equipment to be supplied fromthe fixed installatio...

Carefully place probes on a heat/cold resistant surface or rack until theyreach room temperature. • The AC adapter can present safety concerns if misused or damaged. Toavoid the risk of electric shock or fire, do not use the AC adapter outdoorsor in a dusty, dirty, or wet environment. If the cord, c...

• Probes are fragile devices which can be damaged by mechanical shock,overheating, and absorption of moisture or fluids in the wires or hub.Damage may not be visibly apparent but nevertheless can cause drift, in-stability, and loss of accuracy. Observe the following precautions: • DO NOT allow probe...

Chao Yang District Beijing 100004, PRC CHINA Phone: +86-10-6-512-3436 Telefax: +86-10-6-512-3437 E-mail: [email protected] Fluke South East Asia Pte Ltd. Fluke ASEAN Regional Office Service Center 60 Alexandra Terrace #03-16 The Comtech (Lobby D) 118502 SINGAPORE Phone: +65 6799-5588 Telefax: ...

2 Introduction The 1521 Handheld Thermometer Readout is a low-cost, high-accuracy digitalthermometer readout designed to be used with PRTs and thermistors. Theunique combination of features makes this instrument suitable for a wide vari-ety of applications in industry. Features and capabilities of t...

3 Specifications and EnvironmentalConditions 3.1 Specifications Resistance Range 0 Ω to 500 k Ω Resistance Accuracy, PRT, oneyear † 0 Ω to 25 Ω : 0.002 Ω 25 Ω to 400 Ω : 0.008% (80 ppm) of reading Resistance Accuracy, thermistor,one year † 0 Ω to 2 k Ω : 0.4 Ω 2 k Ω to 200 k Ω : 0.02% (200 ppm) of r...

Digital Filter Exponential with adjustable time constant (1 to 60 seconds) Remote Communications RS-232 serial Display LCD, 6-digit x 7-segment with 16-character alphanumeric Operating Temperature Range 0 to 40°C (32 to 104°F) absolute15 to 35°C (59 to 95°F) full accuracy Power 12 VDC (AC adapter in...

4 Quick Start This section briefly explains the basics of setting up and operating your 1521Thermometer. 4.1 Unpacking Carefully unpack the 1521 and accessories and inspect them to make sure allcomponents are present and in satisfactory condition. Verify that the followingitems are present: • 1521 T...

top of the instrument with the ridged side down. It will fit snugly and lock intoplace when it is fully inserted. The INFO-CON probe connector includes a memory device that stores the unique characteristics of the probe, allowing the 1521 to measure tempera- ture accurately. If your probe was purcha...

5 Parts and Controls The functions of the various features of the 1521 are described below. 5.1 Front Features The front of the 1521 features the LCD display and control buttons. 13 5 Parts and Controls Front Features

5.2 Top and Side Features The top and side of the 1521 feature the probe connector, DC power input, se-rial port, and infrared window. Probe Connector - At the top of the thermometer is the opening where the probe connector is inserted. The probe must be connected using an INFO-CONprobe connector to...

5.3 Back Features See Figure 4 on page 19. Stand -The stand at the back of the 1521 can be flipped down to prop up the in- strument for better viewing. Battery Compartment - Behind the stand is the compartment that contains the battery pack. The battery pack can be accessed if necessary by opening t...

5.5 Accessories The 1521's accessories and their features are described here. AC Adapter -The AC adapter recharges the internal battery pack and can also be used to supply power to operate the 1521 while the battery is being charged(see Section 6.2). Serial Cable -The serial cable can be used to con...

Ordering Information Model Type Range Size Cal Uncertainty andRepeatability Typical Drift(1 year) 5626 Pt-100 Ohm, 4-wire –200 to 660°C 1/4” x 12” or 15”(6.35 x 305 or 381 mm) ±0.015°C ±0.03°C 5628 Pt-25 Ohm, 4-wire –200 to 660°C 1/4” x 12” or 15”(6.35 x 305 or 381 mm) ±0.015°C ±0.03°C 5614 Pt-100 O...

6 General Operation This section explains the details of the operation of the 1521 with its compo-nents and accessories. 6.1 Battery The 1521 has a built-in nickel-metal-hydride battery pack that can power theinstrument for about 18 hours before needing to be recharged. The battery willdischarge muc...

on. The power control circuit inside the instrument manages battery chargingand will stop charging the battery automatically when it’s fully charged. It nor-mally takes about four hours to fully charge the battery. The instrument can beoperated while the battery is being charged. CAUTION: DO NOT lea...

adapter supplied with the instrument. The DC power source plugs into the DCpower input on the right side of the 1521. WARNING: The AC adapter has circuits with high voltages inside that could present danger of electric shock or fire if exposed. If the AC adapteris damaged in any way or becomes hot, ...

smaller type to the right of the measurement. The possible units are degreesCelsius (C), resistance in ohms ( Ω ), degrees Fahrenheit (F), Kelvin (K), and degrees Rankine (R). The units can be easily changed by placing the display inthe units setting mode using the MODE button (see Section 7.5). The...

ognize that accuracy may be significantly degraded using a two-wire connec-tion because of wire resistance. 1521 Handheld Thermometer Readout User’s Guide 24 GND P1 C2 P2 C1 J1 J2 Four-wire Connection GND P1 C2 P2 C1 J1 J2 Three-wire Connection GND P1 C2 P2 C1 J1 J2 Two-wire Connection Short Short F...

7 Display Functions The 1521 operates in any of several modes which determine what informationis visible in the lower alphanumeric portion of the display. The MODE button changes the mode. This button can be pressed repeatedly until a desired modeis set. The various modes are listed below in the ord...

Each of these operating modes is described in the sections that follow. 7.1 Blank Mode This mode is identified by “Blank” that temporarily appears on the display. 1521 Handheld Thermometer Readout User’s Guide 26 Blank Mode Set Units Min/Max Mode Set Rate Hold Mode Set Resolution Cal Mode button but...

In this mode nothing appears on the alphanumeric portion of the display. Usethis mode if you are only interested in the latest measurements and want to sim-plify the appearance of the display. The message “Prb cal expired”, “Mtr cal expired”, “Recharge Needed”, or“Probe is locked” may be displayed. ...

7.5 Units This mode is identified by “Units: C/ Ω /F/K/R” that appears on the display. This mode allows you to select the unit of measurement: C for degrees Celsius, Ω for resistance in ohms, F for degrees Fahrenheit, K for Kelvin, and R for Rankine. The Up and Down buttons are used to select one of...

ITS-90 PRTs calibrated to ITS-90 R(.01), a, b, c, d, a4, and b4 IEC751 PRTs (RTDs) conforming to IEC-751 none CVD PRTs characterized by the Callendar-Van Dusenequation R0, Alpha, Delta, and Beta YSI400 Thermistors matching the YSI-400 series none THERM Thermistors characterized by the thermistorpoly...

A PRT was calibrated to ITS-90 and its calibration certificate states values forcoefficients R(273.16K), a4, b4, a8, and b8. Set the 1521 coefficients to thecertificate values as follows. 1521 Coefficients Certificate Value R(.01) R(273.16K) a a8 b b8 c 0.0 d 0.0 a4 a4 b4 b4 Example 2: A PRT was cal...

higher), and has moderate accuracy (0.05°C to 1°C). This type uses theCallendar-Van Dusen equation to calculate temperature from resistance: r t C R t t t R ( [ ]) ° = + − − ⎛ ⎝⎜ ⎞ ⎠⎟ ⎡⎣⎢ ⎤⎦⎥ ⎧ ⎨ ⎩ ⎫ ⎬ ⎭ ≥ 0 0 1 1 100 100 1 0 α δ 1 100 100 1 100 1 100 3 + − − ⎛ ⎝⎜ ⎞ ⎠⎟ − − ⎛ ⎝⎜ ⎞ ⎠⎟ ⎛ ⎝⎜ ⎞ ⎠⎟ ⎡ ⎣ ⎢ ...

Example 2: A thermistor has coefficients for the equation ln(R) as a function of T given asa, b, and c. Set the 1521 coefficients to the certificate values as follows: 1521 Coefficients Certificate Value b0 a b1 b b2 0.0 b3 c 7.8.14 Probe Wires This function sets the number of connecting wires in th...

8 Communications Interface Remote communications allows an external device, such as a computer, to com-municate with the 1521 to obtain measurement data and control its operation.Communication is accomplished with various commands issued to the 1521through the RS-232 serial port. 8.1 RS-232 Connecti...

ON (all carriage returns are followed by a linefeed (ASCII decimal 10)), andthe duplex to HALF disabling echo. The serial port can be used to transmit measurements to a computer or printer.It can also be used to change settings of the 1521 from a computer or interfacewith software. A full list of co...

Description Command Example ResponseFormat ResponseExample Range Set resolution digits re[solution]=n res=1 1 to 3 Read time ti[me] time ti: hh:mm:ss ti: 16:23:45 Set time Note: You must set hours, min-utes, and seconds for the time tobe set correctly. ti[me]=hh:mm:ss ti=08:15:00 00:00:00 to23:59:59...

9 Calibration The 1521 should be calibrated at regular intervals to ensure that it continues tomeasure with proper accuracy. Calibration should only be done by qualified,authorized personnel. 9.1 Required Equipment The following items are required to test and calibrate the 1521: • 0 Ω four-wire resi...

4. Verify the accuracy at 0 Ω , 4k Ω , 10 k Ω , 40 k Ω , 100 k Ω , and 500 k Ω . 5. Set the meter calibration date to the present date (see Section 7.8.18). 6. Set the meter due date to one year from the present date (see Section 7.8.19). 1521 Handheld Thermometer Readout User’s Guide 44

10 Maintenance • This instrument has been designed with the utmost care. Ease of operationand simplicity of maintenance have been a central theme in the productdevelopment. Therefore, with proper care the instrument should requirevery little maintenance. Avoid operating the instrument in oily, wet, ...

11 Troubleshooting In case you run into difficulty while operating the 1521, this section providessome suggestions that may help you solve the problem. Below are several situa-tions that may arise followed by possible causes of the problem and suggestedactions you might take. 11.1 An Error Message I...

Problem Solution While attempting to measure re-sistance the display shows an in-correct value. Poor or incorrect connection of the probe. A common mistake is to connect the wires of the probe to the wrong terminals. Check the wir-ing carefully (see Figure 6). Open, shorted, or damaged sensor or lea...

The instrument was designed specifically as a test and measuring device. Com-pliance to the EMC directive is through IEC 61326-1 Electrical equipment for measurement, control and laboratory use – EMC requirements (1998). As noted in the IEC 61326-1, the instrument can have varying configurations.The...