![background image](http://html1.mh-extra.com/html/thermofisher-scientific/43iqhl/43iqhl_instruction-manual_1105611156.webp)
Calibration
Calibration
4-6
43iQHL Instruction Manual
Thermo Scientific
2.
To ensure that the zero air is being measured at atmospheric pressure,
check that the zero air flow reported by the analyzer is approximately
1.5 LPM (zero air flow must be slightly greater then instrument sample
flow).
a.
From the Home screen choose
Settings>Health Check>Status
and Alarms>Flow and Pressure
.
b.
Make sure that the reported sample flow is less than the actual zero
air flow.
3.
Monitor the zero air reading and wait for the reading to stabilize.
4.
From the Home Screen, press Calibration>
Calibrate Background
.
The Target Concentration button will read 0.00. The Calculated
Background button will display the background needed to make the
current SO
2
concentration go to 0.00.
5.
Press
Calibrate
to set the SO
2
reading to zero and to save the new
background.
6.
Connect a source of calibration gas to the SAMPLE bulkhead. The
calibration gas concentration should be approximately 80% of the full-
scale range.
7.
To ensure that the calibration gas is being measured at atmospheric
pressure, check that the sample flow in the analyzer is approximately
0.9 LPM.
8.
Sample the vented calibration gas and wait for the instrument reading
to stabilize.
9.
From the Home Screen, choose Calibration>
Calibrate Span
Coefficient
.
The user sets the span concentration by pressing the Edit Span
Concentration button. The Calculated Span Coefficient button will
show what the span coefficient will be set to if the Calibrate button is
pressed. Pressing the Calibrate button will save the new coefficient and
calibrate the instrument.
Summary of Contents for 43iQHL
Page 1: ...43iQHL Instruction Manual High Level Sulfur Dioxide Analyzer 119015 00 1Apr2022...
Page 2: ......
Page 8: ......
Page 18: ......
Page 34: ...Operation Instrument Display 3 8 43iQHL Instruction Manual Thermo Scientific...
Page 150: ......
Page 176: ......
Page 238: ......
Page 256: ......
Page 264: ......
Page 276: ......
Page 277: ......