Michell Instruments MDM300 I.S, Руководство пользователя

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MDM300 I.S. User’s Manual
Michell Instruments 11
INSTALLATION
1
5
8
7
MDM300 & MDM300 I.S. Quick Start Guide
97244 Issue 02, July 2011
Atmospheric
Atmospheric
System
System
Yes
No
Connect the MDM to
the sample gas stream
Determine the approximate
dew point by using the ‘initial check’
procedure on the reverse
The instrument will begin
Measurement mode. During the first few
minutes of this, the displayed moisture
value will drop rapidly below the actual
moisture value, before returning
to a stable reading.
The instrument’s display will show an initial
measured value, and the status display
will show ‘ Measurement in progress’ .
Do you
want to measure
at Atmospheric pressure
or System
pressure?
Do you
want to measure
at Atmospheric pressure
or System
pressure?
4
3
After the initialization
period is complete,
close the outlet flow
control valve and
fully open the inlet
flow control valve .
Then adjust the flow
rate using the outlet
flow control valve
to between 0.2 and
0.5 l/min.
Is the
equivalent
dew point
> - 40Cdp?
Turn the instrument
on. The status display
will read
‘ Initializing
internal sensor ’
Turn the instrument
on. The status display
will read
‘ Initializing
internal sensor ’
Turn the instrument on.
The status display will read
‘ Initializing internal sensor ’.
Adjust the flow rate
using the
inlet flow control valve
to
between
0.2 and 0.5 l/min
Adjust the flow rate
using the
inlet flow control valve
to
between
0.2 and 0.5 l/min
Adjust the flow rate
using the
outlet flow control
valve to
between
0.2 and 0.5 l/min
Typical MDM300 Sampling Arrangement
VENT
1
1
2
2
3
3
4
4
SAMPLE FLOW
Coalescing Filter
Particulate Filter
Inlet Flow Control Valve
Outlet Flow Control Valve Once ‘ Measurement in progress’
has disappeared, the instrument is close
to the final dew point.
Depending on the conditions, it may
continue to respond for a number of
minutes before tracking the measured dew point.
!
HIGH PRESSURE! High pressure gases are potentially hazardous. Energy stored in these
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4
3
2
6
MDM300 I.S.
Advanced Dew-Point Hygrometer
User’s Manual
- I.S.
97213 Issue 4.1
June 2013
Figure 6 Accessories