7
6
OPERATIONAL GUIDE
POWER CONNECTION
Plug the 12 VDC adapter into the power supply socket.
Note:
This instrument use non volatile memory to retain the calibration
parameters and all the other settings even when unplugged.
Note:
Make sure a fuse protects the main line.
PROBE CONNECTION AND PREPARATION
To take measurements, connect the D.O. 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 gen-
tly. 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 8),
use the protective transparent cap supplied in the kit
with the meter.
Shipping
cap
black
red
FILL FIRST
THEN TAP
THEN SCREW
BACK ON
