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.
In addition to this manual you should find the
following items:
• D.O. meter
• AA size batteries (4 each)
• DO Probe with 4m (13’) cable (HI 76407/4)
• (2) PTFE Membranes (HI 76407A)
• Protective cap
• 30 mL electrolyte solution (HI 7041S)
• Rugged carrying case
Note: Save all packing material until you are
sure that the instrument functions
correctly. Any defective items must be
returned in the original packing with the
supplied accessories.
GENERAL DESCRIPTION
The Hanna HI 9143 and HI 9145 are water-
resistant, microprocessor-based, auto-
calibration Dissolved Oxygen meters with ATC.
They have been developed for dissolved
oxygen and temperature measurement in
water and wastewater as well as other
applications such as fish farming.
Dissolved oxygen is indicated in hundredths
of parts per million (ppm=mg/L) or in % of
saturation.
The temperature range is indicated in
centigrade from 0 to 50°C with 0.1°C resolution.
The ppm and the % saturation are both
compensated for changes in solubility of oxygen
in water and for permeability of the membrane
as well as the temperature effect.
Salinity compensation in water allows
determination of mg/L of dissolved oxygen in
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