ATI
Q45S/87 Portable Wet H
2
S Monitoring System
Part 9
– Troubleshooting
37
O&M Manual
– Rev-C
temperature reading should display approximately 0°C and the sulfide reading
should display approximately 0 ppm.
8.4
Display Messages
The Q45 Series instruments provide a number of diagnostic messages which
indicate problems during normal operation and calibration. These messages
appear as prompts on the secondary line of the display or as items on the Fault
List.
MESSAGE
DESCRIPTION
POSSIBLE CORRECTION
Max is 200
Entry failed, maximum user value allowed is 200.
Reduce value to
≤
200
Min is 200
Entry failed, minimum value allowed is 200.
Increase value to
≥
200
Cal Unstable
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.
Out of Range
Input value is outside selected range of the
specific list item being configured.
Check manual for limits of the function to be
configured.
Locked!
Transmitter security setting is locked.
Enter security code to allow modifications to
settings.
Unlocked!
Transmitter security has just been unlocked.
Displayed just after security code has been
entered.
Sensor High
The raw signal from the sensor is too high and
out of instrument range.
Check wiring connections to sensor.
Sensor Low
The raw signal from the sensor is too low.
Check wiring connections to sensor.
Sulfide High
The sulfide reading is greater than the maximum
of the User-selected range.
The reading is over operating limits. Set
measuring range to the next highest level.
Cal Fail
Failure of sulfide calibration. FAIL icon will not
extinguish until successful calibration has been
performed, or 30 minutes passes with no keys
being pressed.
Clean sensor redo zero and span calibration.
If still failure, sensor slope may be less than
25% or greater than 300%. Perform sensor
tests as described in section. Replace sensor
if still failure.
EPROM Fail
Internal nonvolatile memory failure
System failure, consult factory.
Chcksum Fail
Internal software storage error.
System failure, consult factory.
Display Fail
Internal display driver fail.
System failure, consult factory.
Range Cal
Fail
Failure of factory temperature calibration.
Consult factory.
Figure 9 - Q45H Display Messages
