Det-Tronics UD10 DCU Emulator FlexVu Universal Display Unit - Manual (Page 51)

4.2 J-4 95-8656
Calibration Procedure
To calibrate the NTMOS sensor with the FlexVu
UD10-DCU Display:
1. Touch the magnet to the ENTER/SELECT button to
display the Main Menu. Follow the illustration below
to navigate to the “Calibrate” menu.
Main Menu
Process Vars
Display Status
Device Status
Display Setup
Device Setup
Device Cal
Display Test
Device Cal
Calibration
Cal Gas Conc
Calibration
Execute
Abort
2. Activate “Execute” (Enter/Select) to begin the zero
calibration.
3. The UD10-DCU will display “Waiting for Zero” on
the main display screen.
4. When zero calibration is complete (approximately
one minute), the UD10-DCU will display “Waiting for
Span” on the main display screen.
5. Apply calibration gas to the sensor.
6. With 50 ppm H
2
S applied to the sensor, the UD10-DCU
display will continue to show “Waiting for Span” while
the span calibration is being performed.
7. When the UD10-DCU Display shows “Remove Cal
Gas” the calibration is complete. Remove calibration
gas from the sensor.
8. When the gas level falls below the lowest alarm
setpoint, the UD10-DCU automatically exits the
Calibrate mode and returns to normal operating
mode.
menu structure
UD10-DCU with NTmOS h
2
S Sensor
Refer to the following menu when using the UD10-DCU’s
LCD display and internal magnetic switches.
menu HeLp
Status menus only allow the user to view the data.
The Setup menus allow the user to both view and
edit the data.
Humidification Tube Calibration Kit Attached to NTMOS Sensor