Monitor Operation
Set Span menu
WARNING:
!
alarms will be triggered. Either change alarm levels so the alarms are not
triggered, or put the entire system in service mode so no external equipment
(lights, fans, ventilators, buzzers) will be activated.
!
Only use the Set Span function when inspection or calibration maintenance
indicate that it is necessary. See
This option allows users to calibrate the sensor's span. In the main Set
Span screen, press enter to begin. If there is a remote sensor connected,
you must scroll to select Z1 (built-in sensor) or Z2 (remote sensor).
Before starting calibration, connect the regulator to the gas cylinder.
•
Adjust the flow rate to 0.5 L/min.
•
Connect the tubing from the regulator to the sensor calibration
cap. See
•
Let the gas flow for at least 2 minutes before starting the
calibration.
!
If the gas is not allowed to flow for at least 3 minutes, it will affect the
calibration accuracy.
The next screen allows you to specify the span calibration gas
concentration value.
•
Use the arrow keys to increase or decrease the value and press
enter to select.
•
The next screen requests confirmation.
Press enter to confirm and the screen displays the concentration
•
during calibration.
22
If the calibration gas concentration exceeds alarm setpoints,
* Menu *
Set Span
Figure
4.
200 ppm
Set Span
Set Span
198 ppm
Periodic Inspection and
Set Span
Z1
Set Gas
Yes
E
Point Gas Monitor Technical Manual
3
Maintenance.