Table of Contents
Advertisement
May 2019
Section 6: Maintenance
6.1
Handheld test
The GDU-01-TT test transmitter can be used to emit an ultrasonic tone of 40 kHz with a sound pressure
level of approximately 106 dB at 1 m (3 ft). Using the GDU-01-TT handheld device makes testing the
GDU-Incus and other types of ultrasonic detectors quick and cost effective as it may be undertaken at
floor level at distances of up to 8 m (26 ft) (dependent on background noise) provided line of sight with
the sensor can be achieved. It is recommended that all alarms are disabled and the 4-20 mA output is
monitored from the control room or observed on the display. Testing is carried out to ensure that the
sensors are functioning correctly in addition to any internal test function contained within the GDU-
Incus. It is recommended that a handheld test is undertaken in line with existing site maintenance
procedures.
Note: ensure that any internal test functions are disabled or not activated when undertaking a
handheld test to avoid spurious results.
6.2
Verification test
The GDU-PTV-01 performance target verification kit can be used to simulate an actual gas release to
test both functionality and performance of ultrasonic gas detectors by generating a 'burst release'
representative of that expected in the event of a gas leak. The GDU-PTV-01 should be used at the
perimeter of the detector coverage to ensure that all leaks will be detected. It is recommended that all
alarms are disabled and the 4-20 mA output is monitored from the control room or observed on the
display. Testing is carried out to ensure that the sensors are functioning correctly in addition to any
internal test function contained within the GDU-Incus with respect to sensor response and coverage. It
is recommended that a verification test is undertaken at installation and in line with existing site
maintenance procedures.
6.3
Troubleshooting
The GDU-Incus cannot be repaired in the field. If a problem should develop, carefully check for faulty
wiring. If it is determined that the problem is caused by an electronic defect, the device must be
returned to the factory for repair (refer to
6.4
Storage
The detector should be stored in locations free from dust and moisture. The storage temperature
should be well within the limits of the certified temperatures of the equipment. See
storage temperatures.
32
1.2
and
1.3
for instructions).
Reference Manual
00809-0100-3003, Rev AA
Section 7
for
Advertisement
Table of Contents
