Probe Preparation; Battery Installation; Battery Disposal; The Keypad - VWR DO210 Manual De Operaciones

5. To prevent the membrane and electrolyte from drying out, store the probe in the calibration
bottle with the moistened sponge.

PROBE PREPARATION

The DO probe ships with a dry, protective membrane. To install a new membrane cap on the
probe:
1. Unscrew probe membrane cap and discard.
2. Fill a new cap with Oxygen Probe Solution. Prepare according to directions on the solution
bottle.
3. Thread filled membrane cap onto sensor.
4. Allow sufficient warm-up time for initial use (10-15 min). During this time an "ovEr" message
may appear on the display. This is normal. After the warm up is complete the message
will disappear.

BATTERY INSTALLATION

An initial display of "BAT" on the LCD indicates approximately one
hour of battery life for unit operation within specifications. Replace
battery when "BAT" appears on the LCD.
To replace battery, remove the two battery cover screws and the
battery cover and o-ring. Replace the 9V battery. Replace the battery
cover and o-ring (be sure to align the o-ring correctly to prevent a bad
seal) and fasten the two battery cover screws for the splash-
resistant feature.

Battery Disposal

This instrument is powered by a 9 volt battery, which the user must remove and dispose of when the
batteries no longer power the instrument. Disposal requirements vary by country and region, and
users are expected to understand and follow the battery disposal requirements for their specific
locale.

THE KEYPAD

1. : Turns the unit on or off.
2. MODE: In normal operation, toggles display between Dissolved Oxygen in % air saturation,
Dissolved Oxygen in ppm (mg/L), Delete and Recall. In Calibration mode, exits current
calibration and displays the next calibration parameter.
3. CAL: In normal operation, changes the mode from Normal to Calibration. See Calibration
Set-up.
4. : In Calibration Set-up, press this key to save the current parameter to memory.
5. ∆ and ∇ Keys: Increases or decreases the display value as desired.
2
Figure 1.
Battery Installation