
DOTX-45 Dissolved Oxygen System Part 10– Troubleshooting
DOTX-45 61 -
Entry failed, maximum user value allowed is 200.
Reduce value to ≤ 200
Entry failed, minimum value allowed is 200.
Increase value to ≥ 200
Calibration problem, data too unstable to
calibrate. Icons will
not stop flashing if data is too
unstable. User can bypass by pressing ENTER.
Clean sensor, get fresh cal solutions, allow
temperature and conductivity readings to fully
stabilize, do not handle sensor or cable during
calibration.
Input val
ue is outside selected range of the
specific list item being configured.
Check manual for limits of the function to be
configured.
Transmitter security setting is locked.
Enter security code to allow modifications to
settings.
Transmitter security has just been unlocked.
Displayed just after security code has been
entered.
The sensor zero offset point is out of the
acceptable range of -40 to +40 mV.
Check wiring connections to sensor. Allow
sensor to operate powered a m
hours prior to first zero cal.
The raw signal from the sensor is too high and
out of instrument range.
Check wiring connections to sensor.
The raw signal from the sensor is too low.
Check wiring connections to sensor.
The oxygen reading is greater than the maximum
of the User-selected range.
The oxygen reading is over operating limits.
Set measuring range to the next highest level.
The temperature reading is > 55ºC.
The temperature reading is
limits. Check wiring and expected temp level.
Perform RTD test as described in sensor
manual. Recalibrate sensor temperature
element if necessary.
The temperature reading is < -10 ºC
Same as “Temp High” above.
TC may be open or shorted.
Check sensor wiring and perform RTD test as
described in sensor manual. Check j-
connections.
Figure 10-1 Display Messages
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