General Operation; Auto Power Off - Velleman DVM8681 Mode D'emploi

6. Battery Installation
Refer to the illustrations on page 2 of this manual.
The display will blink when battery power is insufficient.
1. Loosen the two screws holding the battery cover. Do not
discard the small washer.
2. Insert 4 x LR44 button cell batteries respecting the polarity.
3. Close the battery compartment.
7. Operation
7.1

General Operation

Refer to the illustrations on page 3 of this manual.
1. Remove the bottom and the inner cap to expose the
electrode. It is normal to find some whitish crystals on the
inner cap and electrode. Keep the sponge in the cap wet
to keep the electrode in a good storage condition.
2. Dip the electrode into the test solution. Press PWR and stir
the pH meter to get a stable reading.
3. A small dot will be flashing while the meter is in measuring
mode. The temperature (in °C or °F) will also be displayed.
4. Press HLD to freeze the current reading. Note that the dot
will stop flashing. Press HLD again to release the reading.
5. Turn off the meter by pressing PWR. Cover the electrode
with the cap and store the meter at an ambient temperature
between 0°C ~ 50°C (32°F ~ 122°F). Refer to
"7.4. Calibrating your Meter" to perform the 3-points
calibration.
7.2 Auto Power-Off
1. This meter will switch off after
approximately 20 minutes of inactivity.
2. Disable this function by holding HLD and PWR
simultaneously pressed before power-on. An "n" will briefly
appear onto the display. The function has been disabled.
The function will be reactivated after every power-off.
V. 03 – 15/10/2018
DVM8681
6 ©Velleman nv