7 IOP Calibration Procedures
7.4 LLAI IOP Calibration Procedure
R688
HPM High-Performance Process Manager Service
439
December 2020
Honeywell
Figure 209 Zero Calibration Circuit
– RTD ZeroCu: 10 Ohm, Pt: 100 Ohm, Ni: 120 Ohm
A
B
C
Channels 1 through 8
NC
Shield
Model MU/MC-TAIL01 and MU/MC-TAIL02 FTAs
Model MU/MC-TAIL03 FTA
Channels 1 through 8
1
3
Ins tall the jumper between pins 1 and 2
to dis connect the reference junction
s ens or from channel 1.
2
P1
24 84
NC
17
TB2
Remove the wire between TB-1 and
TB2-17 to dis connect the reference
junction s ensor from channel 1.
Reference
A
B
C
NC
Shield
Step
Action
3
Select the
ENABLE CALIBRATION
(or
ENABLE RJ CALIBRATION
if an RJ
calibration is being performed) target on the Detail Status display for the LLAI. The
ENABLE CALIBRATION
target changes to the
DISABLE CALIBRATION
target.
4
Momentarily short the two square calibrate pads in the upper-left corner of the
FTA under test, as shown in
. Now check the
STATUS
indicator (DS1) on the associated LLAI FTA.
You will find it extinguishes immediately, then comes back on in approximately
30 seconds. During this time, the IOP card has performed its "zero input"
calibration.
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