Hach-Lange NH4D sc Ammonium Sensor - Manual (Page 33)

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Section 6 Troubleshooting
6.1 Error codes
When the sensor is experiencing an error condition, the sensor
reading on the measurement screen will flash and the relays and
analog outputs associated with this sensor will be held. Errors are
defined in
Table 2 .
6.2 Warning codes
A sensor warning will leave all menus, relays and outputs functioning
normally, but will cause a warning icon to flash
.
Warnings may be used to trigger a relay and users can set warning
levels to define the severity. Warnings are defined in
Table 3 .
Table 2 Error codes
Displayed errors Definition Resolution
NH4 mV RANGE! Ammonium mV value is out of measuring range
See 6.3.1 Troubleshooting during operation on
page 34 .
K+ mV RANGE! Potassium mV value is out of measuring range
pHD RANGE! pHD reference value out of measuring range
TEMP RANGE Temperature value out of measuring range
NO CARTRIDGE No sensor cartridge connected
Connect sensor cartridge, see section 3.3 on
page 13 .
SENSOR CODE Sensor code calibration failed See 6.3.2 Troubleshooting during calibration on
page 36 CALIBRATING Data transfer from software 1.3x has failed
Table 3 Warning codes
Displayed warnings Definition Resolution
NH4 mV RANGE!
Ammonium mV value is close to measuring range
limit
See 6.3.1 Troubleshooting during operation
on page 34 .
K+ mV RANGE!
Potassium mV value is close to measuring range
limit
pHD RANGE! pHD reference value is close to limit
TEMPERATURE Temperature is close to limit
CARTRIDGE OLD Sensor cartridge more than 1 year old Replace the sensor cartridge
AMMONIUM
See 6.3.2 Troubleshooting during calibration
on page 36 .
OFFSET Ammonium offset is out of measuring range
SLOPE Ammonium slope is out of measuring range
POTASSIUM
OFFSET Potassium offset is out of measuring range
SLOPE Potassium slope is out of measuring range