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XNX Universal Transmitter
Section 3 - Calibration
90
3.1 Gas Calibration Menu
Each of the sensor technologies supported by the XNX
®
Universal Transmitter uses unique calibration procedures. The
description provided illustrates the XNX interface with the
sensor. The description does not replace the procedures found
in each sensor’s operating manual.
The Gas Calibration menu is used for Zero and Span calibration
as well as functional gas testing (bump test). The Gas
Calibration menu is accessed from the Main Menu.
This table shows the Gas Calibration menu icons:
Symbol Description
Gas Calibration
Bump Test
Calibrate mA Output
Soft Reset
Align Excel
✓
Figure 193. Gas Calibration Menu
3.2 Calibration
Warning: Do not use the XNX Universal Transmitter in oxygen-enriched
atmospheres. Concentrations displayed will be adversely affected by oxygen
depletion.
Caution: The calibration procedure should be performed only by qualified
personnel. Take appropriate precautions with cylinders of flammable and toxic
gases.
The default calibration values for the “Calibration Required”
diagnostic vary based on sensor type. This value can be
reprogrammed in accordance with site requirements to ensure
the highest level of safety. Correct operation of each sensor
should be conrmed before each use by calibration with a
certied test gas of known concentration before commissioning.
See Section 6 - Specications for calibration gas specications.
Caution: Recalibrate if the temperature of local environment has varied by more
than ±15°C from the temperature of calibration.
Warning: Honeywell recommends periodic bump tests (every 30 days or
in accordance with customer site procedures) to the sensor to insure proper
operation and compliance with the functional safety rating of the installation.
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