Operation
Range Menu
3-10
Model 42
i
Trace Level Instruction Manual
Thermo Fisher Scientific
In addition to each channel having two ranges, each channel has two span
coefficients. There are two span coefficients so that each range can be
calibrated separately. This is necessary if the two ranges are not close to one
another. For example, the low NO range is set to 0–50 ppb and the high
NO range is set to 0–200 ppb.
By default, in the dual range mode, the analog outputs are arranged on the
rear panel connector as shown in
Figure 3–5
. See
Table 3–3
for channels
and pin connections. Dual range mode may be selected from the “
Range
Mode Select
” on page
3-74
.
Figure 3–5.
Pin-Out of Rear Panel Connector in Dual Range Mode
Table 3–3.
Default Analog Outputs in Dual Range Mode
Channel
Connector Pin
I/O Terminal Pin
Description
1 14
1
NO
High
Range
2
33
3
NO Low Range
3 15
5
NO
2
High Range
4 34
7
NO
2
Low Range
5 17
9
NO
x
High Range
6 36
11
NO
x
Low Range
Ground
16, 18, 19, 35, 37
2, 4, 6, 8, 10, 12
Signal Ground
Note
All channels are user definable. If any customization has been made
to the analog output configuration, the default selections my not apply.
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