7
6
PROBE INITIAL PREPARATION
PROBE PREPARATION
All DO probes are shipped dry. To hydrate
the probe and prepare it for use, connect it to
the meter and proceed as follows.
1. Remove the red & black
plastic cap. This cap is
only used for protecting the
probe during shipment, and
can be thrown away.
2. Wet the sensor by soaking the bottom
(2.5 cm/1") of the probe in HI 7041S elec-
trolyte solution for 5 minutes.
3. Rinse the supllied membrane (HI 76407A)
with some electrolyte while shaking it gen-
tly. Refill with clean electrolyte.
4. Gently tap the sides of the
membrane with your finger
tip to ensure that no air
bubbles remain trapped in-
side. To avoid damaging
the membrane, do not tap
the membrane directly on
the bottom.
5. Make sure that the rubber
O-ring sits properly inside
the membrane cap.
6. With the sensor facing
down, screw the cap clock-
wise. Some electrolyte will
overflow.
When the probe is not used,
protect the membrane with the
supplied cap.
Shipping
cap
black
red
SPECIFICATIONS
Range 0.00 to 19.99 mg/L O
2
0.0 to 50.0°C (32 to 122 °F)
Resolution 0.01 mg/L O
2
0.1°C
Accuracy ±1.5% F.S. (O
2
)
±0.5°C
Typical EMC ±1.5% F.S. (O
2
)
Deviation ±1°C
Calibration Manual, 2 point (zero and slope)
Temperature Automatic, 0 to 30°C
Compensation (32 to 86°F)
Probe HI 76401 polarographic
with 3 m (10') cable (included)
Battery Type 1 x 9V
Life approx. 100 hours of continuous use
Environment 0 to 50°C (32 to 122°F); RH max 95%
Dimensions 180 x 83 x 40 mm (7.1 x 3.3 x 1.6")
Weight 240 g (8.4 oz.)
