MiniPuck Model ST132-06x0 Two-Wire TC/mV Transmitter
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Acromag, Inc. Tel: 248-295-0880 Email:
12
POSSIBLE CAUSE
POSSIBLE FIX
Output
appears to be noisy…
This usually results from a
noisy input signal.
Use the “Filter-Control” to select a
medium or high filter to reduce the noise
Unit fails to operate or has an erratic output signal…
Is input grounded?
This non-isolated model is intended for
use with ungrounded T/C sensors and a
grounded probe could inadvertently short
the input bias voltage causing erroneous
operation, in particular if the output loop
is already grounded.
Unit drives a low current output, but fails to drive current at/near 20mA…
Loop supply voltage is too
low to support full-scale or
over-range current into the
loop load.
Check power supply voltage level. Make
sure it is at least 7V plus 0.020*Rload. If
transmission distance is long, then it
must have additional voltage to support
the IR drop in the wire. Ideally, the
voltage should have ample overhead to
drive the load at the maximum output
current of 25mA
Cannot Calibrate Input Channel…
Is input wired properly?
Check input wires at terminals 2 & 3.
Cannot Calibrate Input
Channel…
You may have blown the
input PGA via a ground loop,
or incorrect wiring.
If you cannot get the output signal to
vary for a continuously variable input
signal, your input signal is within range,
and you have properly wired the input
including connections to input terminal 4,
then your input amplifier may have been
damaged and the unit will need to be
replaced.
Service & Repair Assistance
This module contains solid-state components and requires no maintenance,
except for periodic cleaning and transmitter configuration parameter (zero
and full-scale) verification. The potted Surface Mounted Technology (SMT)
board contained within is difficult to repair. It is highly recommended that a
non-functioning transmitter be returned to Acromag for repair or
replacement. Acromag has automated test equipment that thoroughly
checks and calibrates the performance of each transmitter and restores
firmware
. Please refer to Acromag’s Service Policy and Warranty Bulletins
or contact Acromag for complete details on how to obtain repair or
replacement.
TROUBLE-SHOOTING
Diagnostics Table