Instruction manual

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MODEL XMT-A-FF/FI SECTION 15.0
TROUBLESHOOTING
SECTION 15.0
TROUBLESHOOTING
15.1 OVERVIEW
The Xmt-A-FF transmitter continuously monitors itself and the sensor for problems. If the transmitter detects a
problem, the word "fault" or "warn" appears in the main display alternating with the measurement.
A fault condition means the measurement is seriously in error and is not to be trusted. A fault condition might also
mean that the transmitter has failed. Fault conditions must be corrected immediately.
A warning means that the instrument is usable, but steps should be taken as soon as possible to correct the con-
dition causing the warning.
See Section 15.2 for an explanation of fault and warning messages and suggested corrective actions.
The Xmt-A-FF also displays error and warning messages if a calibration is seriously in error. Refer to the section
below for assistance. Each section also contains hints for correcting other measurement and calibration problems.
For troubleshooting not related to measurement problems, see
Section 15.10.
Measurement Section
Temperature 15.3
Dissolved oxygen 15.4
Free chlorine 15.5
Total chlorine 15.6
Monochloramine 15.7
Ozone 15.8
pH 15.9
NOTE
A large number of information screens are available to aid troubleshooting. The most useful of these are
raw sensor current and sensitivity and zero current at last calibration. For pH measurements (available
with free chlorine only), sensor slope and offset and glass impedance are also available. To view the infor-
mation screens, go to the main display and press the

key.