mDT001 HazMon System Tester Technical Manual /24
CMC INDUSTRIAL ELECTRONICS LTD
Phone: (604) 421-4425 Toll Free: (888) 421-4425 Fax: (604) 421-7734
www.cmciel.com [email protected]
The Industry Leader in HazMon Technology
4. Troubleshooting Tips
The tester can only locate sensors that are faulted when they are connected to the tester.
Sensors that are intermittent can be more difficult to locate. Here are some tips to assist you in
locating problems:
1. Use the tester as soon as a fault occurs, as it is more likely the fault will be present
when you connect the tester.
2. In most cases, you do not need to use the tester to locate a bad sensor or wiring on the
network. The basic branch isolation technique is the easiest and fastest way to locate
the fault. The sensor test “
Bus Test
” can be deployed when a partially faulted sensor is
disrupting the network intermittently. The
“
Bus Test
” measures the signal levels on the
cable system and reports if a sensor is loading the system. The traditional isolation
techniques can then be used to locate the sensor that is loading the system. The sensor
can then be verified using the “
Sensor Test
” function to confirm it is defective.
3.
The “
Sensor Test
” function can also be used to verify sensors during the installation. It
is especially useful for speed sensors where the sensors reading can be immediately
compared to a handheld tachometer at the source.
4.
The “
Bus Test
” function can also be used to verify that the expected serial numbers are
being polled by a bus converter. Once a system is commissioned and the sensor
located using the acquire function, the “
Bus Test
” function will display the sensors being
polled by the bus converter. If a sensor is being polled but is not responding then the
wiring to the sensor and the sensor itself should be verified.
A copy of the standard
network troubleshooting guide is included with this manual. A full sized
laminated version is available from our sales office on request.
