MDM50 LP Version User’s Manual
Michell Instruments
3
OPERATION
3
OPERATION
!
Maximum operating pressure is 20 barg (290 psig).
It is important that the gas fittings are correctly tightened, and
any tubing is secure in the push fittings before use.
Failure to do so will affect the instrument's pressure rating.
3.1
General Operation
To operate the MDM50, follow these instructions:
1. Ensure that all gas fittings are fully tightened before use.
2. Gas under test should be restricted to flow rates between 1 and 5 Nl/min
(2 and 10.6 scfh) and pressures from atmospheric to 2 MPa (20 barg (290
psig)).
3. Connect the sample gas supply line to the instrument
Gas In
port.
4. Connect the sample gas vent line to the instrument
Gas Out
port.
5. Switch the instrument on. The display will begin to change as the sensor
responds to the applied dew point.
6. Allow the gas to flow until the display shows a stable reading. Typically
this would be around 5 to 15 minutes for spot checks at dew points of
-40°C (-40°F) and above.
7. Switch the unit off and disconnect the sample lines.
NOTE: Filters are essential for potentially dirty/contaminated gases – the
fitted filter should be checked before and after use and replaced regularly - as
required.
