ABB Z-MT Commissioning And Calibration Procedures page 19

Enter
Cell temp span x x x x x x
or
Enter
Flue temp zero x x x x x x
Flue temp span x x x x x x
Air temp zero x x x x x x
Air temp span x x x x x x
No of An Tx & ENT
Continued from opposite page.
Store.
Advance to next parameter.
Cell Temperature Span
Measure the ambient temperature at the 'CELL T/C' terminals and, from
standard type K thermocouple tables, obtain the millivolt equivalent of this
temperature (a).
Subtract (a) from 54.81 (the millivolt equivalent of 1370°C for a type K
thermocouple) and set the resultant value on the signal source.
Example. Ambient Temperature: 25°C
Millivolt equivalent: 1.00mV
Set millivolt source to: 54.81 – 1.00(mV)
Set '1370' on the upper display.
Store.
Advance to next parameter.
Disconnect the millivolt source from the 'PROBE T/C' terminals and remake
original cell thermocouple connections.
FLUE THERMOCOUPLE INPUT ELECTRICAL CALIBRATION
Connect the millivolt source in place of the 'FLUE T/C' connections using
Ni-Cr/Ni-Al compensating cable – see Section 5.4.1 or 5.4.2 in ZMT/0011.
Flue Temperature Zero
Repeat the procedure as for Cell Temperature Zero
the ambient temperature at the 'FLUE T/C' terminals.
Flue Temperature Span
Repeat the procedure for Cell Temperature Span
ambient temperature at the 'FLUE T/C' terminals.
Disconnect the millivolt source from the 'FLUE T/C' terminals and remake
original flue thermocouple connections.
AIR THERMOCOUPLE INPUT ELECTRICAL CALIBRATION
Connect the millivolt source in place of the 'AIR T/C' connections using
Ni-Cr/Ni-Al compensating cable – see Section 5.4.1 or 5.4.2 in ZMT/0011.
Air Temperature Zero
Repeat the procedure for Cell Temperature Zero
ambient temperature at the 'AIR T/C' terminals.
Air Temperature Span
Repeat the procedure for Cell Temperature Span
ambient temperature at the 'AIR T/C' terminals.
Number of Retransmission Outputs
As for the remainder of the Commissioning Page – see Section 3C.
53.81mV
, above, but measuring
, above, but measure the
, above, but measure the
, above, but measure the
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