Operation; Data, Event And Service Logs; Measure A Grab Sample In; Calibration And Adjustment - Hach CL17sc User Manual

Operation

Data, event and service logs

The controller provides a data log, event log and service log for each connected instrument. The
CL17sc measurements are saved to the data log at 150 second intervals. The event log shows the
events that have occurred. The event log and data log capacity are 2 weeks minimum. The service
log capacity is 24 hours minimum.
Refer to the controller documentation to download the data log, event log and/or service log. The
data log is an XML file that can be changed to CSV or Excel format. The event log and service log
are files in CSV format.

Measure a GRAB SAMPLE IN

Use the GRAB SAMPLE IN menu to add a water sample of known chlorine concentration to the cell
for measurement. When necessary, measure a grab sample for verification or to measure a water
sample collected from another location.
1. Push menu, then select SENSOR SETUP > [select analyzer] > GRAB SAMPLE IN.
2. Complete the steps that show on the display. When prompted, remove the cell lid and add 50 mL
of the grab sample to the cell. Some of the sample will flow to the sample drain.
Modbus registers
A list of Modbus registers is available for network communication. Refer to the manufacturer's
website for more information.

Calibration and adjustment

The calibration curve of the analyzer is set at the factory for performance to specifications.
Calibration can be done for performance verification.
No user adjustments to the factory calibration curve are recommended unless required by a
regulatory agency for compliance reporting purposes, or a large repair of the analyzer is done.
For more information, refer to the instructions in the Calibration Verification Kit or contact technical
support.

Maintenance

Multiple hazards. Only qualified personnel must conduct the tasks described in this section of the
document.
Do not disassemble the instrument for maintenance. If the internal components must be cleaned or repaired,
contact the manufacturer.
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