2 Introduction
The Hart 1529 is a low-cost,high-accuracy, digital thermometer readout de-
signed tob eused with 25 and 100ΩPRTs, thermistors, and thermocouples. Its
uniquecombination of features makes it suitable for a wide variety of applica-
tionsfrom laboratory measurementto industrialprocesses. Features of the 1529
include:
•Measures 25Ωand 100ΩPRTs, thermistors, and thermocouples
•Four inputs: two PRT/thermistor and two thermocouple (standard config-
uration)
•Four-wire connection eliminates lead resistance effects inPRTs
•Three-wire measurement mode for three-wire RTDs
•Exclusive patentedmini-DWF connectors (U.S. Patent No. 5,964,625)
•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-VanDusen PRT characterizations
•Accepts Steinhart-Hart R(T) or T(R) and YSI-400 type thermistor charac-
terizations
•Accepts thermocouple types B, E, J, K, N, R, S, T, Au-Pt, and polynomial
specified
•Temperature offsets for improved thermocouple accuracy
•Stores 10 additional sets of probe parameters
•Eight programmable display sets for display probe information, measure-
ment statistical data, or difference between measurements
•Password protection of settings
•Large, LCD, user-configurable, display viewable in bright or dim lighting
•Serial RS-232 interface standard; IEEE-488 GPIB interface optional
•Powered by external AC supply, 12-15V DC source, or internal recharge-
able battery
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2 Introduction