4 2
TRM138
Set the instrument to OPERATION mode, and after 5…10 s check indications of
DI1
for the channel
the resistance box is connected to. The value shall not exceed 0.0 ± 0.2 °C.
If the measurement absolute accuracy in this point is over 0.2 °C, perform the operations
specified in A5.2.3 – A5.2.4.
A5.2.3
Adjust the instrument, following the procedure presented in A5.2.
The adjustment is over, the instrument will indicate on
DI2
display the calculated coefficient
value which will be recorded to volatile memory (provided that indication icon on
DI4
is not
available) by continuous depressing
button (release the button after
CLb
appears on
DI2
).
A5.2.4.
Check the adjustment results (in OPERATION mode) by indications of DI1, which
must be 0.0 ± 0.2 °C.
A5.2.5.
Power off the instrument, disconnect the resistance box.
Figure A5.2. Diagram for adjusting the instrument for operation with a sensing device
A5.3. Adjusting the instrument for operation with transducers TC 100M and Pt 100P
A5.3.1.
Set at the box 100.00 Ohm.
A3.2.2.
Power on the instrument and set in
int (PL1)
parameter any of the following values:
“00”, “02”’ “03” or “14
”.
A5.3.3.
Complete steps of A5.2.3 – A5.2.4.
A5.4. Adjusting the instrument for operation with thermal couples of L, K, N, J types,
and with active transducers with 0…50.0 mV output signal.
A5.4.1.
Instead of the thermal couple connect to the instrument’s contacts “Input 1” the PP
63dc potentiometer, or any other reference power source with similar performances and accuracy
class not less than 0.05. Connect the instrument to the potentiometer as per the diagram presented
in figure A5.3. Observe polarity.
Instrument Adjustment
Appendix 5
