MASS-tron II/CEM
Air Monitor Corporation
116-004-94.P65 (8-31-10)
MASS-tron II/CEM
- IO&M Manual
61
8 – TROUBLESHOOTING
SECTION 8 – TROUBLESHOOTING
Personnel should be familiar with the operation of the MASS-tron II/CEM (see Section 5) before performing any
troubleshooting.
Note:
Prior to performing any troubleshooting, turn power switch OFF. After 10 seconds, turn power switch ON. If
problem still exists, proceed with troubleshooting steps.
Problem
No Display and "CPU
Activated" LED is not lit.
No output or incorrect output
(Transmitter Output 1) and
display responding correctly
with process change.
No output or incorrect output
(Transmitter Output 1) and
display not responding or
correctly with process
change.
No output or incorrect output.
(Analog Output 2, 3 or 4).
AUTO-zero Function
is not working.
"AUTO-zero in Progress"
LED is continuously lit.
"AUTO-zero in Progress"
LED is flashing rapidly.
"AUTO-cal In Progress" LED
is continuously lit.
"AUTO-cal In Progress" LED
is rapidly flashing.
Solution
– Verify input power is present at the correct voltage as listed on label and connected to
Terminals 15 and 16.
– Verify power switch is in the ON position.
– Check fuse F2 (see Figure 5.2 for location).
– Replace I/O Board.
– Review Factory Set-Up Information Sheet for type of output.
– Check terminal strip wiring for proper installation.
– Verify jumpers are correct for desired type of output (see Section 4.6).
– Perform Transmitter Output Calibration (see Section 6.4).
– Replace I/O Board.
– Verify pressure signal lines are connected correctly.
– Check for leaky or obstructed lines between MASS-tron II/CEM and process sensor.
– Check for kinked internal signal pressure lines in transmitter base.
– Replace Transducer.
– Replace CPU Board.
– Verify correct output is selected (see Section 5.18).
– Verify correct input is applied for process application.
– Verify jumpers are correct for desired type of output (see Section 4.6).
– Check wiring for proper installation.
– Verify menu configuration setup is correct for process application or special function.
– Replace I/O Board.
– Verify AUTO-zero is ON and interval is properly set (see Section 5.10).
– Replace I/O Board.
– Zero value measured during AUTO-zero cycle is between 90 and 100% of span. Transmitter
Input Calibration should be performed as soon as possible (see Section 6.3).
– Replace CPU Board.
– Zero value measured during AUTO-zero cycle is greater than 100% of span. Transmitter
Input Calibration should be performed immediately (see Section 6.3).
– Replace Transducer.
– Verify input pressure is correct for the reference value set in Section 5.12 (see Section 6.5
for calibration procedure).
– Recalibrate Transmitter Zero and Span (see Section 6.3.1).
– Verify input reference pressure is correct for the reference value set in Section 5.12 (see
Section 6.5 for calibration procedure).
– Recalibrate Transmitter Zero and Span (see Section 6.3.1).
If after following the Troubleshooting steps the MASS-tron II/CEM continues to operate
improperly, contact the Service Department for further assistance (see Section 10).
Summary of Contents for MASS-tron II/CEM
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