Instruction Manual
HI 9142
Portable Waterproof
Dissolved Oxygen Meter
w w w . h a n n a i n s t . c o m
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Dear Customer,
Thank you for choosing a Hanna Instruments Product.
Please read this instruction manual carefully before using the instrument.
This manual will provide you with all the necessary information for correct use of the instrument, as well as a precise idea of its versatility.
If you need additional technical information, do not hesitate to e-mail us at tech@hannainst.com or view our worldwide contact list at www.hannainst.com.
TABLE OF CONTENTS |
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PRELIMINARY EXAMINATION ............................................... |
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GENERAL DESCRIPTION ...................................................... |
3 |
PROBE FUNCTIONAL DESCRIPTION ...................................... |
4 |
METER FUNCTIONAL DESCRIPTION ..................................... |
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SPECIFICATIONS ................................................................. |
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PROBE INITIAL PREPARATION ............................................. |
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CALIBRATION PROCEDURE .................................................. |
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TAKING MEASUREMENTS ................................................. |
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ALTITUDE AND SALINITY COMPENSATION .......................... |
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PROBE AND MEMBRANE MAINTENANCE ............................ |
14 |
BATTERY REPLACEMENT ................................................... |
16 |
ACCESSORIES ................................................................... |
17 |
WARRANTY ...................................................................... |
18 |
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PRELIMINARY EXAMINATION
Remove the instrument from the packing material and examine it to make sure that no damage has occurred during shipping. If there is any damage, notify your Dealer.
The meter is supplied complete with:
•HI 76407/4 DO probe with 4 m cable
•2 spare membranes with O-rings
•HI 7041S electrolyte solution (30 mL)
•Calibration screwdriver
•Batteries (3 x 1.5V AAA)
•Instruction manual
•Rugged carrying case
Note: Save all packing material until you are sure that the instrument functions correctly. All defective items must be returned to us in the original packaging with the supplied accessories.
GENERAL DESCRIPTION
HI 9142 is a rugged, waterproof meter that solves the common problems of field use, such as cold, rain, snow and dust, that can damage a meter, rapidly deteriorating its performance and life. It is very simple to use: calibration is performed with HI 7040 zero oxygen solution, while 100% calibration is done in air.
The polarographic probe (HI 76407/4) is provided with a membrane covering the sensors and a built-in thermistor for temperature measurement and compensation. The thin permeable membrane isolates the sensor elements from the testing solution, but allows oxygen to enter. When a voltage is applied across the sensor, oxygen that has passed through the membrane reacts causing current to flow, allowing the determination of oxygen.
The probe included with the meter is supplied with a 4 m (13') cable that allows measurements to be taken even in even hard to reach places. For applications that require longer probe cables, the HI 76407/10 and HI 76407/20 probes with a 10 m (33') or 20 m (67') cable are available.
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PROBE FUNCTIONAL DESCRIPTION
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1.D.O. probe
2.Protective cap
3.Shielded cable
4.Polypropylene probe body
5.Temperature sensor
6.O-Ring seal
7.Silver chloride (AgCl) anode
8.Platinum cathode (sensor)
9.Oxygen permeable membrane
10.Membrane cap
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METER FUNCTIONAL DESCRIPTION
1.Liquid Crystal Display (LCD)
2.On/Off button
3.°C/°F Celsius or Fahrenheit selection button
4.Zero oxygen calibration button
5.Battery compartment cap
6.Probe connector (DIN7)
7.Calibration button
8.Secondary LCD line
9.Primary LCD line
10.Slope calibration trimmer
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SPECIFICATIONS |
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Range |
0.0 to 19.9 mg/L (ppm) |
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-5.0 to 50.0°C (23.0 to 122.0°F) |
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Resolution |
0.1 mg/L |
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0.1°C (1°F) |
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Accuracy |
±1.5% FS |
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±0.2°C (±1°F) |
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excluding probe error |
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Calibration |
Manual in 100% DO |
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Automatic in 0% DO |
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Temperature |
Automatic, 0 to 50°C |
Compensation |
(32 to 122°F) |
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Probe |
HI 76407/4, polarographic, |
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with 4 m (13') cable (included) |
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Battery Type |
3 x 1.5V AAA |
Life |
approx. 1000 hours of use |
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Auto-off |
After approx. 8 minutes |
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Environment |
0 to 50°C (32 to 122°F); |
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RH max 100% |
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Dimensions |
185 x 72 x 36 mm (7.3 x 2.8 x 1.4") |
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Weight |
300 g (10.6 oz.) |
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