Manual for use of dual channel thermometer for thermocouples J, K, S
COMMETER C0321
Instrument is designed for measurement of temperature from two thermocouples of types J, K, S
with the possibility to display the temperature difference between channels. Measured values are
displayed on a dual line LCD display. Instrument compares measured values of temperature with
two adjustable levels for each measured channel. Breaking the level is indicated by blinking the
proper value on display and by audio indication (switchable). Instrument is equipped with minimum
and maximum memory and Hold function. Minimum and maximum values and Hold value are
possible to display on the LCD anytime.
Technical parameters:
Parameters of measurement (both channels):
Range of measurement (with the limitation of connected probe parameters:
thermocouple J (Fe-Co)
-200 to +750°C
thermocouple K (NiCr-Ni)
-200 to +1300°C
thermocouple S (Pt10%Rh-Pt)
-50 to +1700°C
Resolution:
thermocouples J and K 0.1°C from –99.9 to +999.9°C, otherwise 1°C
thermocouple S
0.4°C from –50.0 to +999.9°C, otherwise 1°C
Accuracy of inputs without probes:
thermocouples J and K
±(0.1% +0.4°C) from reading
thermocouple S
±(0.1% +0.85°C) from reading
Compatible temperature probes: J,K,S thermocouple with subminiature male thermocouple
connector
Compensation of thermocouple cold junction temperature: automatic from –10 to +60°C
Measuring interval and display reading refresh: approximately 0.7 s in FAST mode
0.7 to 5 s in dynamic mode
Power: battery 9V or ac/dc adapter 12V with NiCd accumulator 9V
Average current consumption: 0.3 to 1.3 mA (depending on operation mode)
Protection:
IP20
Operation
conditions:
Ambient temperature range: -10 to +60 °C
Ambient relative humidity range: 5 to 95 % RH, non condensing
Outer characteristics in accordance with EN 33-2000-3: normal environment with
characteristics AD1, AE1, AF1, AG1, AH1, AK1, AL1, AN1, AP1, AQ1, AR1, AS1, BA1,
BE1
Storing conditions: temperature -10 to +60 °C relative humidity 5 to 95 % RH
Dimensions: 141 x 71 x 27 mm
Weight including battery: approximately 150 g
Battery life depends on selected display refresh mode (see below). In FAST mode display is
refreshed in shortest possible interval with highest current consumption. In dynamic mode display
is refreshed in interval up to 5 s in case measured values remain stable. Refresh interval is shortened
to approximately 0.7 s only if measured values change. Current consumption in this mode in usual
operation is lower, battery life is up to 4 times longer. The FAST mode is recommend to use only in
cases, when slower display response is not acceptable.
Battery voltage drop below 7 V is indicated with blinking of "BAT" in default display mode
(displaying of actual values) and FAST mode is automatically cancelled to save the battery. At the
same time audio indication of alarms is automatically switched OFF.
If instrument is supplied from external ac/dc adapter, internal 9V battery should be replaced with
rechargeable NiCd accumulator. In usual operation from adapter accumulator is charged only with
2
IE-COM-C0321-04
