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orientAtion
The UD10/NTMOS assembly must be mounted with
the detector pointing down (see photo below).
cAlibrAtion
Calibration Notes
The NTMOS sensor must be calibrated using 50 ppm
H
S in air (never use H
2
2
The recommended source of 50 ppm H
gas is the 50 ppm Ampoule Calibration Kit (p/n
007098-005) with 50 ppm ampoules (p/n 225741-001),
available from Det-Tronics.
The use of any other H
produce inaccurate calibration results, possibly
resulting in a dangerous condition if the sensor
under-reports the level of H
To operate the Ampoule Calibrator:
– Remove the cover and insert a 50 ppm H
ampoule into the ampoule holder inside the
calibrator. Tighten the thumb screw until snug.
– Place the cover back on the calibrator and
connect it snugly to the NTMOS sensor.
– Tighten the thumb screw until the ampoule
breaks.
– Rotate the mixing fan by slowly turning the mixing
fan lever.
4.3
S in nitrogen).
S calibration
2
Warning
S calibration mixture will
2
S.
2
S
2
Ampoule Calibrator Attached to NTMOS Sensor
F-4
FLEXVU UD10
NTMOS H2S SENSOR
AMPOULE CALIBRATOR
THUMB SCREW
MIXING FAN LEVER
95-8618
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