Operational Guide - Hanna Instruments HI2400 Instruction Manual

POWER CONNECTION
Plug the 12 VDC adapter into the power supply socket.
Notes: • This instrument use non volatile memory to retain the cali-
bration parameters and all the other settings even when unplugged.
• Make sure a fuse protects the main line.
PROBE CONNECTION AND PREPARATION
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
(HI7041S) for 5 minutes.
3. Rinse the membrane cap (HI76407A
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.

OPERATIONAL GUIDE

8
Shipping
cap
black
red
FILL FIRST
THEN TAP
THEN SCREW
BACK ON