Module calibration chapter 7, Setting channel gain calibration – Rockwell Automation 1771-IXHR , D17716.5.80 HIGH RESOL.THERMOCOUPLE User Manual
Page 41
Module Calibration
Chapter 7
7Ć7
For example, if the observed value was 17, enter –53 [(0 – 17) x 3.0933 =
–53] in signed magnitude binary into the upper byte of the calibration
word for that channel. Enter 10110101 in bits 15–08 of word 20. The
lower byte will remain zero at this time.
6.
Repeat steps 3 through 5 for each of the remaining input channels.
7.
Initiate a write block transfer to send the corrections to the module. The
input value read by the processor should now be 0000 for all channels.
Setting Channel Gain Calibration
1.
Now set the precision voltage source for +100.000 millivolts. Allow
sufficient time (at least 10 seconds) for the input filter and voltage source
to settle.
Figure 7.4
Applying 100.000mV for Gain Calibration
1
Do not
use
18
Input 1 (+ lead)
17
Input 1 (- lead)
16
Input 2 (+ lead)
15
Input 2 (- lead)
14
Input 3 (+ lead)
13
Input 3 (- lead)
12
Input 4 (+ lead)
11
Input 4 (- lead)
10
Not Used
9
Not used
8
Input 5 (+ lead)
7
Input 5 (- lead)
6
Input 6 (+ lead)
5
Input 6 (- lead)
4
Input 7 (+ lead)
3
Input 7 (- lead)
2
Input 8 (+ lead)
1
Input 8 (- lead)
Terminal Identification
Terminal
Function
Wiring Arm
Cat. No. 1771-WI
18
17
16
1
15
14
13
12
11
10
9
8
7
6
5
4
3
2
100.000mV
Apply
+
-
10533-I