Section 7 Troubleshooting; Error Codes; Warnings - Hach 1720E User Manual

Section 7

7.1 Error Codes

7.2 Warnings

Warning
Displayed Warning
Number
1 Dark Reading Warning
2 Temp Warning
3 Data Log Full
4 Event Log Full
5 5 Volt Warn
6 Inp V Warn
7 Lamp Volt Warn
8 Lamp Curr Warn
9 Output Mode Warn
Troubleshooting
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 the
sensor will be held.
Highlight the Probe Diag menu and press
determine the case of the error. Errors are defined in
Displayed Error Definition
A/D Fail Failed A/D converter. Call the Service Department.
The light source has failed. See
Lamp Fail
replacing it.
Flash Fail Datalog and event log will not work.
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 Probe Diag
menu and press to determine the cause of the error. Warnings are defined in
ENTER
Table 4.
A warning may be used to trigger a relay and users with the sc100 controller can set
warning levels to define the severity of the warning (see the sc100 controller user manual
for more information about warning levels). Errors are defined in
Table 4 Warning Codes
Definition/Resolution
Dark reading detects too much light. (> 0.05 NTU)
Sensor head internal temperature is higher than specified. Contact the Service
Department. (> 70 °C)
Sensor data log is full. No additional data will be logged until sensor log is
downloaded into controller memory.
Sensor data log is full. No additional data will be logged until sensor log is
downloaded into controller memory.
Monitored voltage is outside the range of 4.5–5.5 V.
Monitored voltage is outside the range of 9.08–14.13 V.
Monitored voltage is outside the range of 3.96–4.48 V.
Monitored current is outside the range of 1.67–2.75 Amps.
Activated when the sensor is not in normal measurement mode (such as when
in calibration or verification mode).
. Highlight Errors and press
ENTER
Table
Table 3 Error Codes
section 6.4.3 on page 25
ENTER
3.
for instructions for
Table 4.
to
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