CONFIGURATION AND CALIBRATION
FIELD CALIBRATION
4 - 4
15 December 1994
I-E96-301B1
®
This is an example of a set user gain and offset operation:
In this example the specifications have these functions:
•
S1 selects the field calibration operation (5). The value of 5
is the set user gain and offset command.
•
S2 is the block address of the FC215 which corresponds to
the IMASI03.
•
S3 calls up the channel to be tuned (channel 1).
•
S4 sets the input type (0 = millivolt).
•
S5 sets the amount of gain. Set S5 to the gain value.
•
S6 sets the offset value. Set S6 to the offset value.
Check block N+2 or block N+3 to see if the set user gain and
offset command is processed correctly, and is incorporated into
slave input reading of that channel and type.
Field calibrating all 16 channels for all three input types on a
slave is a lengthy procedure that may require up to four hours
to complete when done properly.
A channel can be disabled and field calibrated separately from
the rest of the active channels on the slave. Each channel can
be calibrated for any of the three input ranges:
•
Individual Channel Low Level Voltage Range (-100 mV to
+100 mV).
•
Individual Channel High Level Voltage Range (-10V to
+10V).
•
Individual Channel 3-Wire Resistance Range (5 Ohms to
500 Ohms).
To field calibrate each of the three ranges:
1. Configure the point in the system.
2. Disable the point from the system.
Function
FC 217 Specifications
S1
S2
S3
S4
S5
S6
1
Tune channel 1 offset
and gain correction
5
100
1
0
gain
value
offset
value
Tune channel 2 offset
and gain correction
5
100
2
0
NOTE: 1. S7 and S8 are not used.
