Hanna Instruments HI 9142 User Manual
Instruction Manual
HI 9142
Portable Waterproof
Dissolved Oxygen Meter
www.hannainst.com
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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
PRELIMINARY EXAMINATION............................................... 3
GENERAL DESCRIPTION ...................................................... 3
PROBE FUNCTIONAL DESCRIPTION ...................................... 4
METER FUNCTIONAL DESCRIPTION ..................................... 5
SPECIFICATIONS ................................................................. 6
PROBE INITIAL PREPARATION ............................................. 7
CALIBRATION PROCEDURE .................................................. 9
TAKING MEASUREMENTS ................................................. 11
ALTITUDE AND SALINITY COMPENSATION .......................... 12
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
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.
zero
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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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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.)
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