6
7
All HANNA D.O. probes are shipped dry. To
hydrate the probe and prepare it for use,
connect it to the meter and proceed as fol-
lows.
1. Remove the red & black plas-
tic cap used for shipping pur-
poses only.
2. Wet the sensor by soaking
the bottom (2.5 cm/1") of the
probe in HI 7041S electrolyte
solution for 5 minutes.
3. Rinse the sup-
plied membrane
(HI76407A) with
some electro-
lyte while shak-
ing it gently.
Refill with fresh
electrolyte.
4. Gently tap the
sides of the
membrane with
your finger to
ensure that no
air bubbles re-
main trapped.
To avoid any
damage, do not
tap the membrane directly on the bottom.
5. Make sure that the rubber O-ring sits prop-
erly inside the membrane cap.
6. With the sensor facing down, screw the
cap clockwise. Some electrolyte will over-
flow.
When not in use, protect the
membrane with the supplied cap.
SPECIFICATIONS
Shipping
cap
black
red
THEN SCREW
BACK ON
THIRD
TAP
SECOND
FILL
FIRST
INSERT
O’RING
HI 9143
HI 9145
Range
0.00 to 45.00 mg/L O
2
0.0 to 300.0% O
2
0.0 to 50.0°C
Resolution
0.01 mg/L / 0.1% O
2
0.1°C
Accuracy (@20°C/68°F)
±1.5% FS (O
2
)
±0.5°C
Typical EMC Deviation
±0.3 mg/L / ±3.5% O
2
±0.5 °C
Calibration
Automatic, in air, at 100%
Temperature Compensation
Automatic, 0 to 50°C (32 to 122°F)
Altitude Compensation
0 to 1900 m
---
(resolution 100 m)
Salinity Compensation
0 to 40 g/L
---
(resolution 1 g/L)
Probe
HI 76407/4 polarographic
with 4 m (13’) cable (included)
Environment
0 to 50°C (32 to 122°F);
RH max 100%
Power Supply
4 x 1.5V AA batteries;
approx. 200 hours of continuous use;
auto-off after 4 hours of inactivity;
or input for 12 Vdc adapter
Dimensions
196 x 80 x 60 mm
(7.7 x 3.1 x 2.4")
Weight
500 g (1.1 lb.)
PROBE PREPARATION
