Metek 920, Operator'S Manual With Essential Health And Safety Requirements

Page: 138 / 278

4-30 | Model 920 Multi-Gas Analyzer
Analog Input Channels – Micro-Interface Board
There are (8) system analog input channels on the Micro-Interface board,
which can be viewed on the Show MAI screen. The parameter assigned
to the input and the signal level (volts or scaled parameter units) are
displayed.
The analog input channels are configured at the factory – the analyzer
will not operate properly if the jumpers or inputs are changed from
the factory settings.
The jumper positions are presented here only so they can be
restored by the user if they should become dislodged, during
transit for example.
Each input channel has (3) jumper-selectable ranges: 0–1 V, 0–5 V, 0–10 V.
The jumpers of interest are labelled
P100 and P101 (Figure 4-5) – ranges
are not marked on the board. The jumper positions are referenced by
“Top,” “Middle,” “Bottom” where “Top” is the position nearest the jumper
label on the board.
Micro-Interface Board Jumper Positions
Input Channel Jumper Header Jumper Position Range (VDC)
5 P100 Bottom 0–10
6 P101 Middle 0–5
!
CAUTION

(Show MAI) RUN

F6 8

1..8
Figure 4-5.
Micro-Interface
board.
P101 P100