ABUS Technologies MPT Melt Pressure Transmitter - Manual (Page 7)

ABUS TECHNOLOGIES INC.
7
MPT
6. INSTALLATION
Recommendation
Before starting the machine, wait until the melt medium at the diaphragm of the PT
has reached its operating/processing temperature. If the machine is started before the
medium reaches its operating temperature, the PT will be damaged. If it is hard to tell when
the operating temperature has been reached, use a combined PT with thermocouple.
Operating temperature at the PT diaphragm is max. 400°C (752°F) for mercury filled
transmitters. Operating temperature at the PT diaphragm is max. 325°C (617°F) for food
grade oil filled transmitters.
Operating temperature at the PT diaphragm is maximum 518°C (1000°F) for filled
transmitters. Temperatures higher than the maximum recommended temperatures will
damage the PT. Ambient temperature for the electronics housing is maximum +85°C.
Higher range temperatures can result in damage and malfunction.
Do not install the pressure transmitter in places where this temperature is exceeded.
7. MAINTENANCE
Troubleshooting
FAULT POSSIBLE CAUSE RESOLUTION
No signal
Cable breakage or poor
contact
Check cable and contact, or replace.
No supply voltage Check supply voltage.
String zero shift
when screwing in
Mounting hole
incorrectly produced
Check hole with test bolt, review with tool if
necessary.
Mounting torque too
high
Adjustment to recommended mounting torque.
No signal change
despite pressure
rise
Plug forming in front of
diaphragm
Check mounting hole; remove solidified plastic.
Diaphragm damaged Send pressure transmitter to ABUS for repair.