User`s guide

DO700 V1.0 8/09

P4 - Temperature unit of measure selection

• Use the CAL or the M+/RM keys to select the desired unit of measure (

C or

F).

• Momentarily press MODE to move to the next parameter or press ENTER to return

to the normal measurement mode.

P5 - Display Backlight Setting

• Use the CAL or the M+/RM keys to select 0, 1, 3, or 6 minute default backlighting

time.

• Momentarily press MODE to move to the next parameter or press ENTER to return

to the normal measurement mode.

P6 - Automatic Power OFF Setting

• Use the CAL or the M+/RM keys to select a 0, 10, or 20 minute Auto Power OFF

time.

• Momentarily press MODE to move to the next parameter or press ENTER to return

to the normal measurement mode.

Note: The default setting for DO is 0, that is, the auto power off function is defeated.

P7 - Restore Factory Default Settings

• Use the CAL or the M+/RM keys to select ON (reset the factory default settings) or

OFF (cancel edit).

• Momentarily press MODE to move to the first parameter (P1) or press ENTER to

return to the normal measurement mode.

Replacing the Membrane Cap

Replace the Membrane cap under the following conditions:

• Electrode response time increases.

• Displayed value appears incorrect or abnormal.

• Damaged or cracked membrane.

Replace as follows:

1. Loosen and then remove the membrane cap.

2. Clean the electrode (without membrane cap) with distilled water and shake the

water off of the electrode.

3. Lightly polish the cathode surface (gold) with a piece of clear velvet or tissue.

4. Slowly inject electrolyte into a new membrane cap. After injecting, check the

electrolyte for air bubbles. If air bubbles are present, carefully tap the

membrane cap to remove the air pockets.

5. Place the membrane cap on a clean surface and place the electrode in the cap

vertically. Slowly twist in a clockwise motion until electrode is tightly attached.

Excess electrolyte may be displaced, wipe excess electrolyte with tissue and

distilled water.

6. Check that there are no air bubbles present in the electrolyte (smaller air

bubbles are acceptable). If large air bubbles are present, re-assembly will be

required.

7. Do not touch the sensitive membrane when using the electrode or replacing the

membrane cap. Oils from the skin will affect the quality of the membrane and

decrease the rate of oxygen permeability.