HF scientific 19998 Triple Validation Turbidimeter - 0-100 NTU - Manual (Page 29)

TVT 1 (5/02) 23
Rev. 2.6 (.pdf)
Pressing the ↵ button will return you back to the normal automatic mode of the
instrument.
You have now completed the customer selectable parameters section of the instrument.
You can enter this menu at any time to re-set, or change, any of the parameters.
9.0 Troubleshooting/System Alarm Relay
9.1 System Warning Message(s)
The instrument routinely performs self-diagnostics and will automatically generate
warning messages to provide you with specific diagnostic information about the
instrument. These are only messages and they do not indicate failure of any component
in the instrument. Normally, the cause of a warning message is external of the
instrument. The following table lists the warning messages and their associated
meanings:
WARNING ASSOCIATED MEANING TYPICAL CAUSE
W01 Lamp failure Lamp has too low an output or the 0.02
NTU calibration standard was
contaminated.
Attempt to recalibrate. If this does not
remedy the problem, the lamp must be
replaced followed by a recalibration.
W02 Calibration failure The wrong standards were used in
calibration or there is an internal sensor
failure of the instrument.
W03 Analog loop failure Analog loop connection is open. Verify
your wiring if you are using the analog
output. If not, turn off the option in the
setup menu.
W04 Flow Error If the flow switch is option installed,
this indicates a loss of flow of process