4 3
TRM138
Set 40.29 mV voltage for the potentiometer output
(the referenced value is 40.292 mV).
A5.4.2 Power on the instrument and set any of the
following values: “
04”’ “05’’ “19” or “20”
in parameter
int (PL1)
for transducer
dat1,
the corresponding value
indicates operation of TRM138 with any of the specified
thermal couples, or set
“06
” corresponding to operation
with an active transducer 0…50.0 mV.
If the code in
int (PL1)
parameter corresponds to
operation with a thermal couple, by setting “oFF” in
CjC (Pl0) parameter disable its automatic correction based on the free ends temperature.
If the code set in int (PL1) parameter corresponds to operation with 0…50.0 mV active
transducer, set for the latter “0.0” in Ain.L (PL1) parameter, and “50.0” in Ain.H (PL1) parameter.
Set the OPERATION mode for the instrument, and after 5..10 s check DI1 indications for the
channel the dc potentiometer is connected to. These readings shall correspond to the following
figures:
– when operating with L thermal couple = 500.0 ± 1.0 °C;
– when operating with K thermal couple = 975.0 ± 1.0 °C;
– when operating with N thermal couple = 1105.8 ± 1.0 °C;
– when operating with J thermal couple = 718.6 ± 1.0 °C;
– when operating with active transducers = 40.29 ± 0.05 mV.
If the measurement accuracy in this point exceeds the specified value, follow the procedures
specified in A4.3 and A4.4.
A5.4.4.
Check the adjustment results by indications of DI1 in OPERATION mode; these values
shall be equal to those specified in A5.4.2.
ATTENTION
! When performing operations of A5.4.2 – A5.4.4 the potentiometer output voltage
shall be unchanged and equal to the value specified in A5.4.1.
A5.4.5.
Power off the instrument and disconnect the PP63 potentiometer from input 1.
A5.5. Adjusting the instrument for operation with thermal couples of TPP(S), TPP(R)
and TVR(A1) type.
A5.5.1.
Instead of a thermal couple connect to the instrument’s contacts “Input 1” the DC
potentiometer PP63, or any 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 the polarity.
Set voltage 20.15 mV at the potentiometer output (the referenced value is 20.146 mV).
A5.2.2.
Power on the instrument and set for transducer dat1 in parameter int (PL1) any of
the following values: “17”,’ “18’’or “21” correspondent to operation of TRM138 with any of the
specified thermal couples.
By setting “oFF” in CjC (Pl0) parameter disable the automatic correction on the base of the
free end temperature.
Set the OPERATION mode for the instrument, and after 5..10 s check DI1 indications for the
channel the dc potentiometer is connected to. These readings shall correspond to the following
figures:
– when operating with TPP(S) thermal coupling = 1908.0 ± 2.0 °C;
– when operating with TPP(R) thermal coupling = 1694.8 ± 2.0 °C;
– when operating with TVR(A1) thermal coupling = 1269.8 ± 2.0 °C;
If the measurement accuracy in this point exceeds the specified value, follow the procedures
specified in A5.4.3 and A5.4.4.
A5.5.3
Check the adjustment results following the procedure specified in figure 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
Gt
is not available
on
DI4
) by continuous depressing
button (release the button after
CLbr
appears on
DI2
).
Appendix 5
Instrument Adjustment
Figure A5.3. Connection diagram
for the PP63 potentiometer
during adjustment
Содержание TPM138
Страница 23: ...22 TRM138 Setting up Procedures Section 6 Figure 16 Programmed parameters setting diagram...
Страница 24: ...23 TRM138 Section 6 Setting up Procedures...
Страница 30: ...29 TRM138 Appendix 1 Dimensional drawing...
Страница 31: ...30 TRM138 Instrument connection Appendix 2 Figure A2 1 Instrument terminal block contacts arrangement diagram...
Страница 35: ...34 TRM138 Figure A2 10 Example of connection of various type transducers Instrument connection Appendix 2...
