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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)
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.
is provided with a
3
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