740 Portable Suspended Solids
13 Error Messages
When the instrument detects an error condition, an error message will be displayed. All
the error messages are described below:
13.1 Measurement
13.1.1 Display Over Range
Calculated display value greater than selected display range maximum, either change
display range or check calibration is correct.
13.1.2 Display Under Range
Calculated display value less than selected display range minimum, check calibration
13.2 Sensor
13.2.1 No Sensor
No sensor detected on input to monitor, if sensor is connected and wiring is okay either
sensor fault or monitor fault.
13.2.2 Sensor Low Limit
Sensor input signal is too low possible, sensor fault.
13.2.3 Sensor High Limit
Sensor input signal is too high possible, sensor fault.
Calibration
13.2.4 Not Available - Sensor Fault
If one of the above sensor faults is present, it is not possible to perform a calibration.
Clear the sensor fault and try again.
13.2.5 Sensor Input Too High (Set Zero)
The data collected for the zero operation was above the allowed maximum for a zero
operation. This can be caused by a dirty zero solution, fouling on the sensor or a fault
with the sensor.
13.2.6 Sensor Input Too Low (Set Zero)
The data collected for the zero operation was below the allowed minimum for a zero
operation. This generally indicates that the sensor is faulty.
13.2.7 Sensor Input Too Low (Set Span)
The data collected for the calibration operation was below the allowed minimum for the
span to be set. This occurs when sensor signal in the calibration solution is too close to
172430IM-Iss07.odt 172430IM-Iss07 Issue Date 23/10/2014 Page 33 of 46
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