Owner's manual

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7
PROBE INITIAL PREPARATION
Probe Preparation
All D.O. probes from Hanna Instrument 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 used for shipping purposes only and
can be thrown away.
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 membrane (HI 76407A supplied with the
meter) with some electrolyte
while shaking it gently. Refill
with clean electrolyte.
4. Gently tap the sides of the
membrane with your finger
to ensure that no air bubbles
remain trapped inside.
To avoid damaging the
membrane, do not tap the
membrane directly on the
bottom.
5. Place the rubber O-Ring properly inside the membrane
cap.
6. With the sensor facing down, screw the cap clockwise.
Some electrolyte will overflow.
When not in use and during polarization, protect
the membrane with the supplied cap.
Shipping
cap
black
red
THEN SCREW
BACK ON
THEN TAP
FILL FIRST
SPECIFICATIONS
Range 0.0 to 19.9 mg/L (ppm)
-5.0 to 50.0°C (23.0 to 122.0°F)
Resolution 0.1 mg/L
0.1°C (1°F)
Accuracy ±1.5% FS
±0.2°C (±1°F)
excluding probe error
Calibration Manual in 100% DO
Automatic in 0% DO
Temperature Automatic, 0 to 50°C
Compensation (32 to 122°F)
Probe HI 76407/4, polarographic,
with 4 m (13') cable (included)
Battery Type 3 x 1.5V AAA
Life approx. 1000 hours of use
Auto-off After approx. 8 minutes
Environment 0 to 50°C (32 to 122°F);
RH max 100%
Dimensions 185 x 72 x 36 mm (7.3 x 2.8 x 1.4")
Weight 300 g (10.6 oz.)