Det-Tronics UD10 FlexVu Explosion-Proof Universal Display Unit - Manual (Page 57)

4.2 K-5 95-8661
Calibration procedure
To calibrate the NTMOS detector with the FlexVu UD10
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
Cal Gas Conc
Calibrate
Calibrate
Execute
Abort
2. Activate “Execute” (Enter/Select) to begin the zero
calibration.
3. The UD10 will display “Waiting for Zero” on the main
display screen.
4. When zero calibration is complete (approximately
one minute), the UD10 will display “Waiting for
Span” on the main display screen.
5. Apply calibration gas to the detector.
6. With 50 ppm H
2
S applied to the detector, the UD10
display will continue to show “Waiting for Span” while
the span calibration is being performed.
7. When the UD10 Display shows “Remove Cal Gas”
the calibration is complete. Remove calibration gas
from the detector.
8. When the gas level falls below the lowest alarm
setpoint, the UD10 automatically exits the Calibrate
mode and returns to normal operating mode.
menu structure
UD10 with NTmOS H
2
S Detector
Refer to the following menu when using the UD10’s
LCD display and internal magnetic switches.
When connecting a HART Communicator to the UD10’s
4-20 mA output, refer to the “UD10 HART” menu in
Appendix E.
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 Detector
UD10 mA Output During Calibration
(UD10 with NTmOS)
UD10 Display Reading
Standard
mode
Replicate
mode
Waiting for Zero 3.8 2.2
Waiting for Gas 3.8 3.8
Waiting for Span 3.8 3.8
Remove Cal Gas 3.8 3.8
back to normal 4.0 4.0