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1. PRINCIPLES OF SAFE USE
before you start to use the device, become familiar with the present instructions;
ensure proper operating conditions, as specified in the user’s technical data (humidity, temperature)
The device is designed so as to ensure an appropriate level of immunity to most interferences that may
occur in industrial environments. In environments of unknown level of interferences,
it is recommended to implement the following measures so as to prevent potential interference with the
operation of the device:
avoid running instrument (signal) cables in the direct vicinity of and parallel to power and supply cables;
it is recommended to use twisted pair signal cables;
in the case of sensing resistors in 3-wire connections, use identical wires;
avoid proximity of remotely controlled devices, electromagnetic meters, high power loads, loads with
phase or group power control, and other devices that cause high impulse disturbances;
2.GENERAL CHARACTERISTICS OF THE CALIBRATOR
the purpose of the device is to measure and simulate temperature sensors
universal input/output (programmed from the keyboard):
- thermoresistant...Pt100, Ni100, for measurements, automatic detection of a 2- or 3-wire connection of
the sensor with line resistance compensation
- thermocouples...J, K, S, B, R, T, E, N, automatic or constant compensation of reference joint
temperature
- linear…………... voltage (mV), resistance
an ergonomic manual housing of small size and weight, with rubber anti-slip side grips
simple and reliable laboratory banana connectors
a clearly visible LCD display and a functional keyboard
battery (2 x 1.5 V) or rechargeable battery (2 x 1.2 V NiMH) power supply, AA type
long operation on a fully charged set of batteries
automatic power supply cutoff at low battery charging level
automatic shutdown after a preset idle time
possibility to test measurement devices and temperature sensors
diagnostic functions facilitating detections such defects in tested circuits as:
- lack of excessive value of current polarizing a resistance sensor (in a simulation)
- short circuits in a voltage signal measurement circuit (in a simulation of thermocouples and mV)
- short circuits or interruptions in sensor circuits (in measurements)
quick and simple readout:
- type of sensor set
- working direction (input/output)
- battery charging level
- current polarizing a resistance sensor (in a simulation)
- type of detected connection in a resistance sensor (2- and 3-wire)
- reference joint temperature in a thermocouple sensor (in a simulation and in measurements)
programmable range and step of output signal changes and other configuration parameters, such as:
resolution of indications, calibration of the zero point and the gain of the measured or set signal,
keyboard block, automatic device shutdown delay, etc.
settings in °C ,
Ω
, mV
programmable password protection of configuration parameters
high resistance to interferences present in industrial environments
protection against incorrect battery polarity
NOTE:
After the calibrator is switched on in the measurement mode, an error signal may be shown in the display
that indicates that no sensor or a sensor different than the factory-defined sensor in the configuration
parameter is connected to the device. If this happens, connect the proper sensor or set the correct
parameter 0:
StYP
(chapter 6, Table 1)
Summary of Contents for AR915
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