Auto Power Off - Extech Instruments CL500 User Manual

7. Close the cover and lock it in place.
8. Press the "Test" button. The display will flash "tEST" for about 10 seconds and then the
results will appear.
Note: Clean and rinse the test bottle with distilled water after each test.
Data HOLD
Press the HOLD button once while taking a measurement to freeze the value on the display.
Press HOLD again to release the data hold function.
Data Record (MAX/MIN Readings)
1. The Data record function records the MAX and Min readings.
2. Press "REC" button once to begin Data recording. The LCD will display the "REC" symbol.
3. To view the MAX value while in the recording mode press "REC" once. The display will show
the maximum reading and "REC MAX" will show on the LCD display.
4. Press "REC" button once again and "REC MIN" will display on the LCD along with the
minimum reading.
5. To erase the Max value and continue recording, while in the record mode, momentarily
press the "Rec" button. The display will show "REC MAX". Momentarily press the "HOLD"
button, the display will now show "REC". The Max value has been erased.
6. To erase the Min value and continue recording, while in the record mode, momentarily press
the "Rec" button. The display will show "REC MAX". Press the "REC" button once again and
now the display will show "REC MIN". Momentarily press the "HOLD" button, the display will
now show "REC". The Min value has been erased.
7. To exit Record mode, press the "REC" button for 3 seconds. The display will return to the
current reading.
Mode Selection – Free or Total
1. The meter should be powered OFF.
2. Press the "HOLD" and "REC" buttons simultaneously and then momentarily press the
"Power" button.
3. Press the "TEST" button to select the desired function (Free or Total) Chlorine.
4. Press the "REC" button to confirm and save the selection into memory.
5. Momentarily press the "Power" button to turn off the meter.
Auto‐Power OFF
The auto power off feature automatically switches the CL500 OFF 10 minutes after the last key
press.
800.561.8187
4
www. .com
CL500-en-GB_V1.2 8/15
information@itm.com