Hach H135 miniLab User manual

The H135 miniLab
Technical information is a portable waterproof pH meter with an ISFET pH
Calibration points 1,2 or 3 point pH range 2 to 12 pH
Auto buffer Recognition pH 4.01, 7.00, 10.01, 4.01, 6.86, 9.18
Automatic Temperature compensation Temperature range 5 to 40 °C (40 to 105 °F)
Power Auto Shut Off. 3 V lithium batteries (2x), CR2032
Turn the meter on Calibration
To change the buffer set or the temperature units, push and hold CAL 1 and then push
the power button. Push CAL 1 again to toggle between the parameters.
Maintenance and storage
For protein deposits the manufacturer recommends an enzyme cleaning solution (2964349). Do not use organic solvents.
Reference electrode replacement
Avoid direct contact with the pH sensor.
When the liquid in the reference electrode is decreased, replace the electrode (9316900).
Troubleshooting Error code Definition
Battery icon <10 hours battery life
BAT Replace the battery. Battery replacement Always dry the meter first.
or 14.00 Voltage outside range. Dry or insufficient sample.
E06 Slope error.
E07 Voltage error.
E08 Calibration time out.
E13 Temperature sensor error.
Note:
When an error occurs, clean the probe and calibrate again with sufficient sample. If the
problem is not solved, contact Technical Support.