MAN0923_Issue 3_04/15
Touchpoint Pro
Operating Instructions
91
6. Commissioning
1. If not already logged in, login with a valid engineer level user name
2. From the
System Status
screen select the
Inputs
icon
then select the channel to be calibrated
3. Select
Calibration
from the popup menu
4. Press
Inhibit
to inhibit the channel
5. Select
Zero
Adjust
, and when ready press
OK
6. Generate a zero signal at the sensor, preferably by forcing the output to 4 mA
7. View the signal reading until it is stable, and then press
Accept
8. Confirm that the reading is zero, and press
Save
then
OK
9. Select
Span Adjust
10. Enter the equivalent concentration of span gas that can be generated by the sensor
(preferably 100 %FSD, 20 mA) and press
Accept
11. When ready press
OK
and generate an equivalent gas reading at the sensor, preferably by forcing the
output to 20 mA
12. View the signal reading until it is stable, and then press
Accept
13. Confirm that the reading is correct, and press
Save
then
OK
14. Return the sensor to normal operation, and confirm that the signal has returned to zero
15. Select
Clear inhibit
to remove the inhibit from the channel
Note: Please read the chapter
“User Interface” before proceeding.