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2 Introduction
The Hart 1529 is a low-cost, high-accuracy, digital thermometer readout de
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signed to be used with 25 and 100Ω PRTs, thermistors, and thermocouples. Its
unique combination of features makes it suitable for a wide variety of applica
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tions from laboratory measurement to industrial processes. Features of the 1529
include:
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Measures 25Ω and 100Ω PRTs, thermistors, and thermocouples
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Four inputs: two PRT/thermistor and two thermocouple (standard config
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uration)
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Four-wire connection eliminates lead resistance effects in PRTs
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Three-wire measurement mode for three-wire RTDs
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Exclusive patented mini-DWF connectors (U.S. Patent No. 5,964,625)
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Automatic current reversal eliminates thermoelectric EMF errors
• Accuracy: PRTs to 0.006°C, thermistors to 0.002°C, and thermocouples
to 0.3°C
• Typical resolution: PRTs 0.001°C, thermistors 0.0001°C, thermocouples
0.01°C
• Measures four sensors simultaneously with a fast one-second measure-
ment cycle
• Measures one sensor at 10 readings per second (limited accuracy)
• Adjustable moving average for extra precision
• Stores over 8,000 measurements internally
•
Accepts ITS-90, PT-100 (ASTM E1137, DIN 43760, or IEC-751), and
Callendar-Van Dusen PRT characterizations
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Accepts Steinhart-Hart R(T) or T(R) and YSI-400 type thermistor charac
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terizations
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Accepts thermocouple types B, E, J, K, N, R, S, T, Au-Pt, and polynomial
specified
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Temperature offsets for improved thermocouple accuracy
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Stores 10 additional sets of probe parameters
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Eight programmable display sets for display probe information, measure
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ment statistical data, or difference between measurements
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Password protection of settings
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Large, LCD, user-configurable, display viewable in bright or dim lighting
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Serial RS-232 interface standard; IEEE-488 GPIB interface optional
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Powered by external AC supply, 12-15V DC source, or internal recharge
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able battery
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2 Introduction