Zero Calibration - Honeywell VA201T Calibration Handbook

Calibration Handbook
(12) When the following message is displayed press Enter:

Zero Calibration

The display changes to show the following instruction:
If zero reading in ambient air cannot be guaranteed, fit gassing cover over weather protection and apply
instrument air at one liter/minute for 30 sec.
10. Press to begin Zero Cal; display then shows
11. After 10 sec display shows; Zero is now set.
12. Once Zero Cal is complete, after a few seconds, display shows.
After a few seconds, the display shows:
Releases analog output from 2mA (inhibit signal) to normal operation (4mA)
13. Press and hold
The display then changes to show the Calibrate menu. The Searchline Excel gas detector is now live.
SIG:
TGT:
Ensure Zero Gas
Then Press Enter
Processing Data
Please Wait . . .
Zero Calibration
Installation
Complete
Press Enter to
Release 4-20
; for 3 sec, display shows
4-20 Released

Signals OK
OK
Calibrate
Install
82 Searchline Excel