Michell Instruments QMA601, User Manual

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QMA601 User’s Manual
Michell Instruments 35
OPERATION
Figure 27 Measurement Screen
Parameter Description
Carrier Gas
The settings menu is accessed through the Settings item on the main
screen.
Available Options: Air, Ar, CH
4
, C
2
H
2
, C
2
H
4
, C
2
H
6
, C
3
H
6
, C
3
H
8
, C
4
H
10
,
CO, CO
2
, H
2
, He, Kr, N
2
, Ne, NH
3
, NO, N
2
O, O
2
, Xe, User 1, User 2,
User 3
User Gas Entry:
If a 'User' carrier gas is selected an additional option
to set this gas is added to the menu. See section 3.7.1.1 for more
information.
DP Calculation
Selects the dew-point calculation method.
Available Options:
IGT (IGT Bulletin #8)
ISO (ISO 18453),
Ideal Gas,
Pressure Input
Selects the pressure source.
Available Options:
Atmos
– Atmospheric pressure.
Fixed
– User-settable fixed value.
When the Fixed option is chosen it enables a fixed value to be entered
(see screen shot below).
External
– An externally connected pressure transducer.
When the External option is chosen it enables the choice of the zero
and span range pressure transducer values of 4 or 20mA (see screen
shot below).
Pressure Unit
for indication purposes only but can be changed in the "HMI Menu"
(Section 3.7.3)
Table 9 Measurement Screen