Hach Ultra Low Range CL17sc User Manual page 26

8.2 Warnings—Yellow light
To show the warnings, push menu and select DIAGNOSTICS > [select analyzer] > WARNING LIST.
A list of possible warnings is shown in
When a warning occurs, the status indicator light changes to yellow. A warning icon flashes and a
message is shown on the bottom of the controller display. If sufficient sample flow is available, a
warning does not affect the operation of menus. A warning does not affect the operation of the relays
and outputs.
Warning
BUBBLES There are bubbles in the cell. Clean the cell. Refer to
DETECTED
CLEAN CELL The cell is getting stained or
SOON dirty and should be cleaned
soon to prevent an error.
HIGH The chlorine concentration is
CHLORINE at or more than the HIGH CL
ALARMS setpoint.
LOW The chlorine concentration is
CHLORINE at or less than the LOW CL
ALARMS setpoint.
LOW SAMPLE The sample flow measured
FLOW is less than the minimum
sample flow rate. Refer to
Specifications
HIGH SAMPLE The sample flow measured
FLOW is more than the maximum
sample flow rate. Refer to
Specifications
HIGH The CL
EXPOSURE shown on the home screen
is more than the SET
EXPOSURE LIMIT setpoint.
26 English
Table 8.
Table 8 Warning messages
Description
on page 3.
on page 3.
exposure count
2
Solution
(Optional) Set the BUBBLE REJECT setting to
on. Refer to Step 10: Configure the analyzer
on page 17.
Clean the cell. Refer to
Increase the HIGH CL ALARMS setting. Refer to
Step 10: Configure the analyzer
Or
Decrease the chlorine concentration of the
sample supplied to the analyzer.
Decrease the LOW CL ALARMS setting. Refer to
Step 10: Configure the analyzer
Or
Increase the chlorine concentration of the sample
supplied to the analyzer.
Set the sample flow rate. Refer to
flow rate on page 16.
Clean the filter in the Y-strainer if necessary to
remove a blockage. Refer to
the Y-strainer on page 22.
Note: When a LOW SAMPLE FLOW warning occurs, the analyzer
temporarily stops measurements. When the flow rate is again
within the flow rate specification, the analyzer automatically starts
measurements.
Set the sample flow rate. Refer to
flow rate on page 16.
Increase the SET EXPOSURE LIMIT setting.
Refer to Step 10: Configure the analyzer
on page 17.
Or
If the RO (reverse osmosis) membrane is
replaced, set the CL
2
follows:
Push menu, then select SENSOR SETUP >
[select analyzer] > CONFIGURE >
CL2 EXPOSURE > RESET TO ZERO.
Clean the cell on page 20.
Clean the cell on page 20.
on page 17.
on page 17.
Step 8: Set the
Clean the screen in
Step 8: Set the
exposure count to zero as