7 IOP Calibration Procedures
7.10 RHMUX IOP Calibration Procedure
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LLMux FTA calibration connections
Figure 220 LLMux FTA Calibration Connections
100 ž
No Connection
J5
1
2
3
4
J1
100 mV
Source
+
-
T1A
T1B
T2A
T2B
7.10 RHMUX IOP Calibration Procedure
Introduction
The main calibration constants for the Remote Hardened Low Level Multiplexer (RHMUX) IOP are
determined during factory calibration and are used to calibrate the gain block error and the A/D
reference.
A subsequent field calibration calibrates only the A/D reference and is done only for the 100 mV range
which results in the field calibration factor being set to a ratio of the original factory calibration gain to
the field calibration gain. This factor is then used to modify the original factory calibration constants
such that the original factory calibration gain constants still exist.
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