Hach TU5 Series User Instructions page 13

Operation
Chemical exposure hazard. Obey laboratory safety procedures and wear all of the personal protective
equipment appropriate to the chemicals that are handled. Refer to the current safety data sheets
(MSDS/SDS) for safety protocols.
Set the automatic cleaning options
After the automatic cleaning module is installed, set the cleaning options.
1. Push menu.
2. Select SENSOR SETUP>CONFIGURE>CLEANING MODULE.
3. Select ON.
The menu options for the automatic cleaning module are shown on the display.
4. Select SENSOR SETUP>CONFIGURE>CLEANING.
5. Select an option.
Option
CLEAN.
INTERVAL
WIPER REMINDER When set to on, the reminder for wiper replacement shows on the display when it is
CLEAN. LEVEL
THRESHOLD
OUTPUT DELAY
Show maintenance information
1. Push menu.
2. Select SENSOR SETUP>DIAG/TEST>COUNTERS.
3. Select an option.
Option
WIPER REPLACE Shows the remaining number of wiper cycles before a wiper replacement is necessary.
VIAL TIME
W A R N I N G
Description
Sets the cleaning interval. Options: 2, 6 or 12 hours (default) or 1 or 7 days. The
frequency of the cleaning interval selected depends on the sample composition.
Note: To manually start a cleaning cycle, select SENSOR SETUP>START WIPE.
time to replace the wiper (default: OFF).
When set to on, a cleaning cycle is done when the reading is more than the
THRESHOLD setting (default: OFF).
When set to off, a cleaning cycle is done at the time frequency of the cleaning interval.
Sets the threshold for a cleaning cycle. Options: 0 to 1000 NTU (or FNU).
Note: This menu option only shows when the CLEAN. LEVEL setting is set to on.
Use caution when the threshold is set. High turbidity levels may be the result of critical
process issues where immediate attention is necessary.
Sets the time for the hold condition of the output after the cleaning cycle. Options: 0 to
120 seconds (default: 30 seconds).
Description
Shows the date of the last vial installation or replacement.
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