C Commissioning Page - ABB Z-MT Commissioning And Calibration Procedures

3.1C Commissioning Page

COMMISSIONING
Software Identification
ACJC const
Measure Temperature
or
ACJC Transistor
IC1
Fig. 3.3C Identifying the ACJC Transistor
4
Select the Commissioning Pag .
N o t e . It is possible to access the Electrical Calibration
down this page using Security Access at this point – see Section 4.
Advance to next parameter.
Software Identification
Shows the software type and issue number to be quoted on any
correspondence with the Company.
Advance to next parameter.
Automatic Cold Junction Compensation (ACJC) Constant
& ENT
The cold junction reference temperature (in °C) is shown on the upper display.
If the value is suspect it may be checked as follows:
a) Measure the temperature at the ACJC transistor (TR1) with a
mercury-in-glass thermometer – see Fig. 3.3C.
b) Adjust the displayed value to that of the measured temperature.
N o t e . Adjusting the ACJC constant affects the calibration.
Continued opposite.
IC2
TR1
C6 C8
3
Module Position 1
Module Position 2
Relay Module
IC4
IC3
IC2
PL2
IC1
TR2 TR1
PL1
Omitted from single relay modules.
Fig. 3.4C Identification of Module Types
procedures further
1
Module Position 3
Analogue Retransmission
Module
PL2
C1
IC7
C5
IC8
RL1
Tx1
PL1