MAN0923_Issue 3_04/15
Touchpoint Pro
Operating Instructions
137
9. Problem Solving
Error
Code
Message
Possible
Cause
Remedial
Action
51
Zero gas calibration failed - zero
signal too low
The level at which the
channel is trying to
calibrate zero is outside
the configured limits
1. For a mA channel, calibration should always be
done by forcing the output from the sensor where the
facility exists. Check the configured limits on zero and
span gas calibration and ensure that the forced mA
value is within the limits.
2. For a mA channel where the sensor has no facility
to force the output, consult the manufacturer’s
instructions and carry out a calibration at the sensor.
3. For a mV channel, there may be a problem
with the sensor or the calibration gas. Consult the
manufacturer’s instructions.
52
Zero gas calibration failed - zero
signal too high
The level at which the
channel is trying to
calibrate zero is outside
the configured limits
Please refer to error 51
53
Span gas calibration failed - span
signal too low
The level at which the
channel is trying to
calibrate span is outside
the configured limits
Please refer to error 51
54
Span gas calibration failed - span
signal too high
The level at which the
channel is trying to
calibrate span is outside
the configured limits
Please refer to error 51
55
Gas calibration failed - sensor
lifetime exceeded. The sensor
sensitivity has fallen to below 50%
of its original value; please replace
the sensor.
Touchpoint Pro monitors
the performance of mV
sensors relative to their
first span calibration.
If the gas response
falls below 50% of the
original value this error
occurs.
1. Contact your local service representative to
schedule a sensor replacement.
2. When the replacement sensor has been fitted,
repeat calibration in accordance with the instructions
in chapter 6, using the “First Span” function
56
Entered span gas concentration is
out of range - please edit and try
again
The span gas selected is
not within the configured
limits
1. Check the configured limits for span gas
concentration.
2. Obtain an alternative span gas that is within the
limits.
3. Retry the operation.
57
Operation failed; invalid object type
There has been a
communication error
between the CCB and
COB
1. Please retry the operation.
2. If still unsuccessful, on the front panel, press the
Accept and Reset buttons together for 10 s, which
will restart the COB.
3. If the error has not cleared, if possible cycle the
power to the system.
4. If the problem persists, please contact your local
service representative.
