2
Introduction
The Hart 1522 is a low-cost, high-accuracy digital thermometer readout de-
signed to be used with PRTs and thermistors. The unique combination of fea-
tures makes this instrument suitable for a wide variety of applications in
industry. Features and capabilities of the 1522 include the following:
•
Accepts input from platinum resistance thermometers (PRTs) and therm-
istors
•
Works with Hart’s INFO-CON probe connector (which is partially based
on U.S. Patent 5,857,777) to automatically recognize the type of sensor
and its characteristics
•
Alerts the operator automatically when the probe calibration or meter cal-
ibration expires
•
Measures with an accuracy of ±0.025°C at 25°C with PRTs and ±0.005°C
at 25°C with thermistors
•
Accepts three- or four-wire sensors to eliminate lead resistance errors
•
Measures with a fast one-second measurement cycle
•
Displays maximum, minimum, and delta temperatures
•
Uses a unique factory-assigned passcode to protect programmed settings
•
Displays measurements and settings on a high-contrast LCD display
•
Communicates with other equipment or a computer using an RS-232 se-
rial interface
•
Can be powered from its AC adapter or rechargeable battery
•
Stores up to 10,000 readings with reading, units, date, time, and label in
autologging mode at user selected intervals
•
Stores up to 100 readings with reading, units, date, time, and label in de-
mand logging mode
•
Contains an infrared interface for fast downloading of logged data
•
Stores 25 labels (8 characters) for easy recognition of logged data
•
Stops logging once maximum readings are stored. Memory must be
cleared to store additional data
•
Starts and stops logging both from the front panel and through the
RS-232 and infrared interfaces
•
Allows user to select a label for every reading stored in demand logging
mode
7
2 Introduction
