8
INITIAL PREPARATION
The instrument is supplied complete with batteries. In order to place the
batteries inside the instrument follow the instructions from page 21.
To take measurements, connect the DO probe to the meter securely by
aligning the pins with the socket located on the back of the meter,
pushing the plug in and tightening the threaded ring.
Probes shipped from Hanna Instruments are dry. To hydrate the probe
and prepare it for use, connect it to the meter and proceed as follows:
1. Remove the red and black plastic cap.
This cap is for shipping purposes and
can be thrown away.
2. Wet the sensor by soaking the bottom
2½ cm (1") of the probe in electrolyte
(HI 7041S) for 5 minutes.
3. Rinse the membrane cap (HI 76407A
supplied in the kit with the meter)
with electrolyte solution while shaking
it gently. Refill with clean electrolyte
solution.
4. Tap gently the sides of the membrane
cap with your finger tip to ensure that
no air bubbles are trapped. To avoid
damaging the membrane, do not tap
it directly on the bottom.
5. Make sure that the rubber O-ring sits
properly inside the membrane cap.
6. With the sensor facing down, slowly
screw the cap clockwise. Some electrolyte
will overflow.
When not in use and during polarization
(see page 9), use the protective transparent
cap supplied in the kit with the meter.
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