Thermo Scientific 49iQ, Instruction Manual

Page: 101 / 282

Operation
Settings
Thermo Scientific 49iQ Instruction Manual 3-73
high range is active, the range mode selection status output is at half of
full-scale.
When the high range is active, the concentration must drop to 85% of
the low O
3
range for the low range to become active.
In addition, each O
3
range and analog output has a span coefficient so
that each range can be calibrated separately. This is especially necessary
if the two ranges are not close to one another. For example, the low O
3
range is set to 0–50 ppb and the high O
3
range is set to 0–20,000 ppb.