Battery Installation; Operation - Velleman DVM8681 Bedienungsanleitung

1. Introduction
To all residents of the European Union
Important environmental information about this product
This symbol on the device or the package indicates that disposal of the device after its lifecycle could harm
the environment.
Do not dispose of the unit (or batteries) as unsorted municipal waste; it should be taken to a specialized
company for recycling.
This device should be returned to your distributor or to a local recycling service.
Respect the local environmental rules.
If in doubt, contact your local waste disposal authorities.
Thank you for choosing Velleman! Contents: 1 x pH meter, 4 x LR44 button cell and this manual. Please read the
manual thoroughly before bringing this device into service. If the device was damaged in transit, don't install or use it
and contact your dealer.

2. Battery Installation

• Loosen the two screws holding the battery cover. Do not discard
the small washer.
• Insert 4 x LR44 button cell batteries respecting the polarity.
• Close the battery compartment.
3. Description
1. measured pH reading
2. CAL – calibration mode
3. ATC – automatic temperature compensation
4. temperature reading
5. HLD – data hold
6. PWR – power button
7. CAL – calibration

4. Operation

a. General Operation
• 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.
• Dip the electrode into the test solution. Press PWR and stir the pH meter to
get a stable reading.
• A small dot will be flashing while the meter is in measuring mode. The temperature (in °C or °F) will also be
displayed.
• Press HLD to freeze the current reading. Note that the dot will stop flashing. Press HLD again to release
the reading.
• 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 "d. Calibrating your Meter" to perform the 3-
points calibration.
DVM8681 – pH METER