Fluke Calibration 1502A - referenčný teplomer s presnosťou merania ±0,006 °C
Vyhodnocovacie zariadenie Hart Scientific 1502A dosahuje presnosti merania až ±0,006 °C (model Hart Scientific 1504 je dokonca ešte presnejší, až ±0,002 °C). Naviac pri použití so sondami 100-ohm, 25-ohm a 10-ohm dosahuje rozlíšenie až 0,001 °C v celom rozsahu merania. Tento najmenší prístroj vo svojej triede je možné používať aj s voliteľnou batériovou sadou a tak zvýšiť prenosnosť pri kalibrácii.
Each Tweener is programmable to match a probe’s constants for maximum linearity and accuracy. All probe constants and coefficients are programmed through simple, front-panel keystrokes. Temperature is displayed in °C, °F, K, or resistance in ohms.
The 1502A accurately measures the resistance of the probe and then converts the resistance to a temperature value using its built-in algorithms.
For convenience, the 1502A reads the common industrial grade IEC-751 or “385” ALPHA RTD without any programming. Enter the actual R0 and ALPHA of the individual probe for increased accuracy. For maximum accuracy, use the ITS-90 formulas. The Tweener accepts the subranges 4 and 6 through 11.
ITS-90 formulas reside in the Tweener’s firmware. If your probe has been calibrated for any of the above subranges of the ITS-90, you simply enter the coefficients directly into your Tweener.
Each thermometer comes complete with an RS-232 interface for automation of temperature data collection, calibrations, or process control functions. An IEEE-488 interface is available as an option.
The 1502A is calibrated digitally using the front-panel buttons. You never have to open the box to calibrate it. This calibration protocol further reduces the cost of the 1502A. It goes where you go and works the way you want it to.
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Specifications |
1502A |
1504 |
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Temperature Range† |
–200 °C to 962 °C (–328 °F to 1764 °F) |
Any thermistor range |
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Resistance Range |
0W to 400W, auto-ranging | 0W to 1 MW, auto-ranging |
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Probe |
Nominal RTPW: 10W to 100W |
Thermistors |
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Characterizations |
ITS-90 subranges 4, 6, 7, 8, 9, 10, and 11 |
Steinhart-Hart thermistor polynomial |
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Resistance Accuracy |
0W to 20W: 0.0005W 20W to 400W: 25 ppm |
0W to 5 KW: 0.5W 5 KW to 200 KW: 100 ppm 200 KW to 1 MW: 300 ppm |
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Temperature Accuracy† |
±0.004 °C at –100 °C |
±0.002 °C at 0 °C |
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Operating Temperature Range |
16 °C to 30 °C |
13 °C to 33 °C |
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Resistance Resolution |
0W to 20W: 0.0001W 20W to 400W: 0.001W |
0W to 10 KW: 0.01W 10 KW to 100 KW: 0.1W 100 KW to 1 MW: 1W |
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Temperature Resolution |
0.001 °C |
0.0001 °C |
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Excitation Current |
0.5 and 1 mA, user selectable, 2 Hz |
2 and 10 mA, automatically selected |
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Measurement Period |
1 second |
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Digital Filter |
Exponential, 0 to 60 seconds time constant (user selectable) |
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Probe Connection |
4-wire with shield, 5-pin DIN connector |
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Communications |
RS-232 serial standard |
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Display |
8-digit, 7-segment, yellow-green LED; 0.5-inch-high characters |
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Power |
115 VAC (±10 %), 50/60 Hz, 1 A, nominal |
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Size (HxWxD) |
61 x 143 x 181mm (2.4 x 5.6 x 7.1 in) |
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Weight |
1.0 kg (2.2 lb.) |
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Probes from Hart |
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Calibration |
Accredited NIST-traceable calibration provided |
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| †Temperature ranges and accuracy may be limited by the sensor you use. | ||
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