Table of Contents
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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
27
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Table of Contents
Troubleshooting
Need help?
Do you have a question about the 1720E and is the answer not in the manual?
Questions and answers
I have a blinking red light on my 1720E-1V. I have a green light on where it says ready. Blinking red light where it says status. I was just wondering what that means what it means when its blinking.
I'm only getting .. .. for my reading on my 1720e turb meter. The light bulb is new and working. not sure what to do.
If your Hach 1720E turbidity meter is displaying ".. .." despite having a new working light bulb, follow these troubleshooting steps:
1. Check for Light Path Obstruction – Ensure nothing is blocking the light path inside the turbidimeter.
2. Inspect the Lamp Installation – Verify that the new lamp is correctly installed and making proper contact.
3. Check for Improper Wiring – Ensure all connections at the controller and turbidimeter head are correct.
4. Verify System Voltage – Fluctuations in voltage may cause display issues. Restart the instrument to reset it.
5. Check for Circuit Board Issues – If problems persist, the circuit board in the turbidimeter head may be faulty.
6. Look for a Light Leak – Ensure the turbidimeter head is properly aligned with the body or calibration cylinder.
7. Perform Zero Electronics Calibration – Run the ZERO ELECTRONICS function in the CALIBRATION MENU.
8. Check the Photocell – If broken or cracked, the photocell may need replacement.
If the issue continues, contact the Customer Service Department for further assistance.
This answer is automatically generated