CONFIGURATION AND CALIBRATION
FIELD CALIBRATION
I-E96-301B1
15 December 1994
4 - 7
High-Level Voltage
Source
•
-10 V to +10 V range with an accuracy of
±
1.0 millivolt (or
±
0.005 percent of this range).
•
DC output resistance of less than 5.0 Ohms.
Resistance Source
•
5.0 Ohms to 500 Ohms range with an accuracy of
±
25 mil-
liohms (or
±
0.005 percent of specified range).
Individual Channel Calibration
This section provides field calibration instructions for low level,
high level and resistance inputs. To calibrate each channel in
the module:
1. Configure the point in the system.
2. Disable the channel.
3. Calibrate the channel with 2 to 11 calibration points.
4. Enable the channel.
This example shows the values to tune the function code 217
specifications for a low level voltage range calibration for chan-
nel one on the IMASI03 referenced by the function code 215 at
block address 100. S4 of function code 216 must also be set to
any of the thermocouple or millivolt types .
This example shows the values to tune the specifications to, in
order to reset the channel field calibration data to the original
factory settings for an IMASI03 at address one. This is needed
only if the field calibration is unsuccessful.
Function
FC 217 Specifications
S1
S2
S3
S4
S5
S6
Disable point
1
100
1
x
2
x
2
x
2
Point calibration
1
2
100
1
0
value
x
2
Enable point
3
100
1
x
2
x
2
x
2
NOTES:
1. Repeat this entry at least 2 times making specification 5 equal to the low voltage value applied
to the input terminals. For maximum accuracy, repeat 11 times of the range to be used.
2. x is a do not care value.
Function
FC 217 Specifications
S1
S2
S3
S4
S5
S6
Reset factory
calibration
11
100
x
1
x
1
x
1
x
1
NOTE:
1. x is a do not care value. It may be left at the previous value.
