Thermo Scientific 43i, Инструкция по эксплуатации

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Operation
Range Menu
Thermo Fisher Scientific Model 43i Trace Level-Enhanced Instruction Manual 3-9
In the dual range mode, there are two independent analog outputs. These
are labelled simply as the “High Range” and the “Low Range”. Each
channel has its own analog output range, averaging time, and span
coefficient.
This enables the sample concentration reading to be sent to the analog
outputs at two different ranges. For example, the low SO
2
analog output
can be set to output concentrations from 0 to 50 ppb and the high SO
2
analog output set to output concentrations from 0 to 100 ppb.
In addition, each SO
2
analog output has a span coefficient. 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 SO
2
range is set to 0–10 ppb and the high SO
2
range is set to 0–1000
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” in the “Service Menu”, later in this chapter.
Figure 3–5. Pinout 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 SO
2
High Range
2 33 3 SO
2
Low Range
3 15 5 None
4 34 7 None
Dual Range Mode