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Reference Manual
00809-0100-3003
5
Maintenance
5.1
Hand-held test
You can use the GDU-01-TT test transmitter to emit an ultrasonic tone of 40 kHz with a
sound pressure level of approximately 106 dB at 3 ft. (1 m). Using the GDU-01-TT hand-
held device makes testing the GDU-Incus and other types of ultrasonic detectors quick and
cost-effective, as you can test at floor level at distances of up to 26 ft. (8 m) (dependent on
background noise) if you can achieve line of sight with the sensor.
Emerson recommends disabling all alarms and monitoring the 4-20 mA output from the
control room or observing it on the display. Test to ensure that the sensors are functioning
correctly in addition to any internal test function contained within the detector. Emerson
recommends doing a hand-held test in line with existing site maintenance procedures.
Note
Ensure that any internal test functions are disabled or deactivated when doing a handheld
test to avoid spurious results.
WARNING
This device will need a Hot Work Permit.
5.2
Troubleshooting
The GDU-Incus cannot be repaired in the field.
If a problem develops, carefully check installation and wiring. If you determine that the
problem is caused by an electronic or other defect, contact your Emerson representative.
Refer to
5.3
Storage
Store the detector in a location free from dust and moisture.
Make sure the storage temperature is well within the limits of the certified temperatures
of the equipment.
5.4
Spare parts and accessories
Part number
GDU-01-TT
GDU-01-TT-CHARGER
GDU-02-360-KIT
GDU-02-370-KIT
Reference Manual
Service support
for instructions.
Description
GDU test transmitter, battery-operated, and charger
18 V 0.83 A standard charger for the GDU test transmitter
GDU Incus 2-in. pipe U-bolt kit
4-in. pipe mount bracket kit. Material: stainless steel
Maintenance
December 2020
41
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