Honeywell XNX-UT Series User Manual

XNX Universal Transmitter Quick Start Guide
56
8.2 Functional Gas Testing (Bump Test)
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.
WARNING
Exposure to desensitizing or contaminating substances or concentrations causing operation of any
alarm may aect sensor sensitivity. Following such events, it is recommended to verify sensor
performance by performing a functional gas test (bump test).
CAUTION
The calibration procedure should be performed only by qualied personnel. Take appropriate
precautions with cylinders of ammable and toxic gases..
It is recommended that the detector is tested frequently to ensure the system
is operating properly. Keep in mind different sensor types may require more
frequent maintenance depending on the environmental conditions and gases
present. The weatherproof cover has a spigot for attaching tubing from a gas
cylinder. This may be used for a simple functional (or bump) test of the sensor.
However, this method may not be suitable for all gas types and/or applications
due to environmental conditions. It is the responsibility of the user to ensure
suitability of this method for each application.
1. Whenbumpgasisappliedtothesensor,thebumptestscreen
displaysthecurrentreadingofthesensorandthepeakreadingthat
hasoccurredduringthebumptest.
Peak Reading
Full Scale
Alarm Levels
Current Sensor
Reading
Figure 51. Bump Test screen
2. Ifthedifferencebetweenreadingandappliedgasconcentrationis
outsidetheacceptablelimitsfortheapplicationfollowtheprocedures
forzeroingandcalibratingthedetector(seeSection8.1).
3. Ifreadingisstillinaccuratereplacethesensor.

Honeywell XNX-UT Series Specifications

General

Brand	Honeywell
Model	XNX-UT Series
Category	Transmitter
Language	English