Hach PAT700 DS, Basic User Manual

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Accept or remove an alarm
When a warning or an error that is not critical occurs, the animation area of the measurement screen
flashes red.
1. Push << to show the sliding menu.
2. Select ALARMS . The Alarm Acknowledge screen opens.
• Push ACCEPT ALARMS (bell with green checkmark) to acknowledge the alarm.
• Push DELETE ALARMS (bell with a red X) to delete all alarms in the list.
3. Push ENTER to return to the measurement screen. If the error condition still exists but has been
accepted, the animation area shows steady red.
Error codes
Table 8 shows the error codes that occur any time one of the non-critical subsystems fail or a failure
occurs from which the analyzer tries to recover.
When an error occurs, the animation area flashes red to identify when an error condition is present.
In addition, the digital output that represents the error condition and the three analog outputs (error =
2 or 22 mA) change their state to identify when an error condition is present.
When the error condition is removed, the analyzer attempts to recover and continue to operate. Once
a valid TOC measurement is taken, the analog outputs once again represent the measured values.
For error codes not listed, contact technical support.
Table 8 Error alarm codes
Code Message Resolution
SC151 LampExtinct Replace the lamp.
SC188 TOCOverLimit The TOC measurment is over the set limit. Examine process conditions, or set the TOC
maximum to a different level.
Critical error alarm codes
In a critical error condition, the instrument cannot function. The error shows as a full-screen flashing
message. The digital output that represents the error condition and the three analog outputs (error =
2 or 22 mA) change their state to identify when an error condition is present.
Operation stops until the error condition is corrected. Touch the screen interface to accept the alarm
and see more information. Refer to
Table 9 . For codes not listed, contact technical support.
Table 9 Critical error codes
Code Message Resolution
SC175 BothLampsBad Replace both lamps.
SC174 InstrumentTemperature Ambient temperature is greather than the maximum set temperature.
Decrease the instrument and environmental temperature.
Warning alarm codes
When a warning condition is present, a warning indicator (flashing red rectangle on the display)
shows on the display to identify that a warning message is pending in the alarm log. The digital
output that represents an error state changes its state to identify when a warning condition is present.
The three analog outputs do not identify when a warning condition is present.
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