Iq force™ Gas Detector Reference Manual


Fresh Air/Zero Calibration



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Fresh Air/Zero Calibration
inaccurate, proceed to Section 4.3
and perform the span calibration.
WARNING
The Canadian Standards Association (CSA) requires the
instrument to undergo calibration when the displayed LEL value
during an accuracy check fails to fall between 100% and 120% of
the expected value for the gas.
Honeywell Analytics’ multi-calibration gas mixtures contain
approximately 18.0% oxygen. During the bump test, the oxygen
sensor should read within ±0.5% (absolute) of the level shown on
the calibration cylinder.
4.2 Fresh Air/Zero Calibration
WARNING
Fresh air/zero calibrations may only be performed in an
atmosphere that is known to contain 20.9% oxygen, 0% LEL, and
0 ppm toxic gas.
To initiate the fresh air/zero calibration. Make sure that the instrument is in an atmosphere known to contain
20.9% oxygen, 0% LEL, and 0 ppm toxic gas. If the quality of the atmosphere is suspect, a cylinder of zero air available from Honeywell Analytics, maybe used. Zero air is clean air that is known to contain no contaminants. Apply zero air as shown in Figure 4.1.
2. Press the MODE button three times within two seconds to begin the fresh air/zero calibration sequence. The IQ Force will briefly display AUTO CAL and then begin a second countdown. Press the MODE button before the end of the second countdown to begin the fresh air/zero calibration. The fresh air/zero calibration has been initiated when the IQ Force shows cascading zeros:

IQ Force™ Gas Detector Reference Manual
28


Iq force™ gas detector
Contacting honeywell analytics
Technical services
Appendix a toxic gas measurement – warning, danger, stel,
Appendix d toxic sensor cross-sensitivity .............................. 52
Operating temperature
Multi-sensor capability
Table 2. alarm logic
Iq force portable gas detectors have been designed for the
In the event of an lel over-range alarm, the iq force must be
A sensor that cannot be calibrated or is found to be out of toler-
Do not use the pump for prolonged periods in an atmosphere
Case: the instrument is enclosed in a solid pc (polycarbonate) case with tpe (rubber) overmold.2. front face:
On/off mode button:
Battery charger connector:
Turning the iq force on
Notethe bump test interval and bump test due reminder are
Notesample probe assembly and tubing must be attached when
Always verify that all sensors present in the instrument are
Turning the iq force off
The iq force is designed to detect potentially life threatening
The iq force must be located in a nonhazardous location during
A combustible sensor over-range alarm indicates a potentially
Pc connection via infrared port
Error messages
Manual sample-draw kit
Motorized sample-draw pump
The canadian standards association (csa) requires the lel
Calibration/accuracy verification
Figure 1. bump test/span calibration setup
Fresh air/zero calibration
Possible causes and solutions
Fresh air/zero calibrations may only be performed in an
Span calibration
Noteonce the calibration cycle is completed, the iq force will
Possible causes of span calibration failure and remedies:
A sensor that cannot be calibrated or is found to be out of
Noteto enable the h
Notehoneywell analytics recommends regular verification of
Notethe bump test interval and bump test reminder are used
Toxic gas measurement – warning, danger, stel, and twa alarms
A.2 time weighted average (twa)
Appendix b calibration frequency rec-
Verification of accuracy & related terminology
Lengthening the intervals between calibration checks or bump tests
One button automatic full calibration and calibration docks
Iq force sensor information



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