Hach 6120118 - Manual (Page 35)

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Section 7 Troubleshooting
7.1 Error Codes
When a sensor is experiencing an error condition, the sensor reading on
the measurement screen will flash and all relays and analog outputs associated with this
sensor will be held. The following conditions will cause the sensor reading to flash:
• Sensor calibration
• Relay timer washing cycle
• Loss of communication
Highlight the Sensor Diag menu and press ENTER . Highlight Errors and press ENTER to
determine the cause of the error. Errors are defined in Table 6 .
7.2 Warnings
A sensor warning will leave all menus, relays, and outputs functioning normally, but will
cause a warning icon to flash on the right side of the display. Highlight the Sensor Diag
menu and press
ENTER to determine the cause of the warning.
A warning may be used to trigger a relay and users can set warning levels to define the
severity of the warning. Warnings are defined in
Table 7 .
7.3 Troubleshooting the pH or ORP Sensor
Clean the sensor using the procedure described in section 6.2 on page 34 and then
calibrate the sensor as shown in section 4.7 on page 25 or section 4.8 on page 29 .
If the measuring system cannot be calibrated after cleaning, contact Technical and
Customer Service (U.S.A. only) on page 39 .
Table 6 Error Codes
Displayed Error Definition Resolution
ADC FAILURE System measurement fails Contact Technical Consulting Services.
Table 7 Warning Codes
Displayed Warning Definition Resolution
PROBE OUT RANGE Measured pH/ORP exceeds the expected value range. Contact Technical Consulting Services.
TEMP OUT RANGE
Measured temperature exceeds the expected value
range.
Contact Technical Consulting Services.
FLASH FAILURE System flash memory write has failed. Contact Technical Consulting Services.
REF ELECTRODE
Standard Electrode is not performing within the required
specifications.
Contact Technical Consulting Services.