Hanna Instruments HI 2400 - Manual (Page 7)

7
POWER CONNECTION
Plug the 12 VDC adapter into the power supply socket.
Notes: • This instrument use non volatile memory to retain the
calibration 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
(
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 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
O P E R A T I O N A L G U I D E O P E R A T I O N A L G U I D E O P E R A T I O N A L G U I D E O P E R A T I O N A L G U I D E O P E R A T I O N A L G U I D E