Electro-Chemical Devices (ECD) H10C - Manual (Page 4)

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2. Wait for the unit and probe to dry completely before
resuming operation.
3. If the unit does not function correctly after steps1 and 2,
call ECD for possible repair or replacement (see Warranty).
Installing the Batteries
The Model H10 pH meter is packaged with 4 “AAA” alkaline
batteries required for operation. To insert the batteries into the
meter, follow the procedure outlined below.
1. Use a screw driver to remove the two screw and battery
cover to expose the battery compartment. (Figure 1)
2. Note the polarity and insert the batteries into the battery
compartment correctly.
3. Replace the battery cover and make sure to secure the
two screws for the water-tight feature.
[Note: Press the “On/Off” key to turn the unit on. If the unit is
running then you can press the ”On/Off “ key to turn the unit off.
The unit will automatically turn off after 20 minutes of no key
activity.]
Figure 1