Range Mode Selection - Thermo Scientific 410iQ Instruction Manual

Range Mode Selection

Thermo Scientific
The Range Mode Selection screen is used to switch between the various
range modes: Single, Dual, and Auto Range.
Home Screen>Settings>Measurement Settings>Range Mode Selection
The Range Mode Selection screen contains the following information:
Single: In single range mode, there is one range, one averaging time,
●
and one span coefficient.
Dual: In the dual range mode, there are two independent analog
●
outputs. These are labeled simply as the "High Range" and the "Low
Range". Each channel has its own analog output range setting,
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 CO
output can be set to output concentrations from 0 to 500 ppm and the
high CO analog output set to output concentrations from 0 to 1000
2
ppm.
In addition, each CO
range can be calibrated separately. This is especially necessary if the two
ranges are not close to one another. For example, the low CO
set to 0–200 ppm and the high CO
Auto: The auto range mode switches the CO
●
high and low range settings, depending on the concentration level. The
high and low ranges are defined in the Range Settings menu.
For example, suppose the low range is set to 500 ppm and the high
range is set to 1000 ppm. Sample concentrations below 500 ppm are
output based on low range selection and sample concentrations above
500 ppm are output based on high range selection. When the low
range is active, the range mode selection status output is at 0 volts.
analog output has a span coefficient so that each
2
range is set to 0–10000 ppm.
2
Operation
Settings
analog
2
range is
2
analog outputs between
2
410iQ Instruction Manual 3-77