Universal Display Module
UDM Manual Page | 7
5.4 Set Autospan Level Menu
“Set Autospan Level” is used to set the span gas concentration level that is being used to calibrate the
sensor. This adjustable level is dependant on the detector attached. Refer to the applicable detector
manual. The current setting can be viewed in “View Sensor Status”, but you can also enter the “Set
Autospan Level” menu to make changes.
To access the “Auto Span Level” menu:
1) Hold the magnet over PGM2, of the channel you want to access.
2) When the arrow prompt appears hold the magnet continuously for 3 seconds, “View Sensor
Status” text will scroll.
3) When the “View Sensor Status” text scrolls, hold the magnet over PGM2.
4) As soon as the arrow prompt appears, remove the magnet away.
5) When the “Auto Span Level” text scrolls, hold the magnet over PGM2.
6) When the arrow prompt appears, hold continuously again for 3 seconds. This will bring you
into the “Auto Span Level” menu and display the current span gas level setting.
7) Swipe the magnet momentarily over PGM 1 to increase or PGM 2 to decrease the value until
the correct span level is displayed.
8) Hold the magnet over PGM 2 for 3 seconds to accept the new value.
9) The display will show “Autospan Level Saved”.
10) The display will revert to the “Auto Span Level” text scroll and after a few seconds revert to
normal operation.
5.5 Zero Calibration
A zero calibration can be performed on all sensors by accessing the UDM calibration menu. Intervals for
zero calibration are dependent on the attached make and model of detector. Details regarding the zero
calibration frequency can be found in the applicable detector manual.
To access the Zero Calibration menu:
1) Hold the magnet over PGM1, of the channel you want to access.
2) When the arrow prompt appears hold the magnet continuously for 3 seconds, “PGM1 = Zero
… PGM2 = SPAN” text will scroll.
3) Hold the magnet on PGM1 and when the arrow appears, continue to hold for 3 seconds until
the zero calibration is started and “Setting Zero” scrolls on the display.
4) Once the zero calibration is finished, the display will say “Zero Cal Complete”
5) The detector will return to normal operation.
Note: During zero calibration, the detector output will either go to 2mA or stay at 4mA
depending on the detector attached.
5.6 Span Calibration
A zero calibration can be performed on all sensors by accessing the UDM calibration menu. Intervals for
span calibration are dependent on the attached make and model of detector. Details regarding the span
calibration frequency can be found in the applicable detector manual.
