Maintenance and Troubleshooting
Hardware Installation and Maintenance Manual B
–29
Table B-1 Potential analyzer issues and solutions (Continued)
Symptom Response
Reading seems to always be high by a
fixed amount
Capture diagnostic data and send the
file to SpectraSensors (see “To read
diagnostic data with
HyperTerminal” in the Firmware
Manual).
Reading seems to always be high by a
fixed percentage
Capture diagnostic data and send the
file to SpectraSensors (see “To read
diagnostic data with
HyperTerminal” in the Firmware
Manual).
Check that Peak Tracking is enabled
(see “To change parameters in
Mode 2” in the Firmware Manual).
Reading displays 0.0 or seems relatively
low
Capture diagnostic data and send the
file to SpectraSensors (see “To read
diagnostic data with
HyperTerminal” in the Firmware
Manual).
Reading is erratic or seems incorrect Check for contamination in the sample
system, especially if the readings are
much higher than expected.
Capture diagnostic data and send the
file to SpectraSensors (see “To read
diagnostic data with
HyperTerminal” in the Firmware
Manual).
Make sure the computer COM port is
set for 19200 baud, 8 data bits, 1 stop
bit, no parity, and no flow control.
Reading goes to “0”
If 4-20 mA Alarm Action is set to 1,
look on display for an error message
(see “To change parameters in
Mode 2” in the Firmware Manual).
Gas concentration is equal to zero.
Reading goes to full scale
If 4-20 mA Alarm Action is set to 2,
look on display for an error message
(see “To change parameters in
Mode 2” in the Firmware Manual).
Gas concentration is greater than or
equal to full scale value.
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