Probe Preparation; Battery Installation; The Keypad - YSI DO200 Betriebshandbuch

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

PROBE PREPARATION

The YSI DO200 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 "LOW BAT" on the LCD indicates approximately
one hour of battery life for unit operation within specifications. Replace
battery when "LOW 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.

THE KEYPAD

1. : Turns the unit on or off.
2. MODE: In normal operation, toggles display between Dissolved Oxygen in % air saturation
and Dissolved Oxygen in ppm (mg/L). 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.
∆ ∆ ∆ ∆ and ∇ ∇ ∇ ∇ Keys: Increases or decreases the display value as desired.
5.
3
Figure 1.
Battery Installation