Impact / Impact Pro / Impact Pro IR Operating Instructions
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Impact Configuration Utility (ICU) PC software prior to version 3.0 will allow iv)
the user to select alternative flammable gases. These alternative settings are
not appropriate for IR sensors. It is the user’s responsibility to ensure that the
flammable gas settings are not changed from methane for IR flammable sensor
cartridges.
The latest version of this utility (3.0 or later) is designed for this IR series. This
revised version of this utility provides for the IR gases and ranges and prevents
selection of Hydrocarbon gases other than Methane, as could be done with the
standard Impact employing a catalytic bead. The operator must ensure that if
an IR flammable cartridge is fitted, only the new ICU (3.0 or later) is utilized
for Downloading/Uploading of the instrument. Check with Honeywell Analytics
that you have the appropriate version of the ICU software.
STEL and LTEL readings are not available from the infrared COv)
2
sensor;
therefore STEL and LTEL alarms are not implemented.
Calibration
Only methane %LEL IR sensors can be calibrated using the Enforcer calibration
accessory. Methane %V/V and CO
2
IR sensors can be calibrated only by using
a separate cylinder and regulator. Contact Honeywell Analytics for full details of
calibration gases and accessories.
When performing a calibration (other than with an Enforcer) the gas flow should be
started 30 seconds before starting the span calibration sequence.
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