Michell Instruments QMA401, Руководство пользователя

Страница: 38 / 102

QMA401 User’s Manual
28 97450 Issue 2, March 2018
OPERATION
3.7.1 Measurement Screen
Figure 24
Measurement Screen
Parameter Description
Carrier Gas
Toggles through the different carrier gas options.
Available Options: Air, Ar, CH
4
, C
2
H
2
, C2H
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 option is chosen in Carrier Gas then this
Parameter will show on the Measurement Page. See Appendix B for
more information.
DP Calculation
Sets the frost point calculation method.
Available Options:
ISO (ISO 18453)
Ideal Gas,
IGT (IGT Bulletin #8)
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.
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.
Purge Feature
This enables or disables the purge function, see section 3.7.1.3 below.
Table 5 Measurement Screen Parameters