User Guide

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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.
Each Printing D.O. meter is supplied complete
with:
• 1.5V AA size batteries (4 pieces)
• DO Probe with 4 m/13' cable (HI 76407/4)
• Membrane cap, 2 pieces (HI 76407A)
• Electrolyte solution, 30 ml (HI 7041S)
• Paper rolls, 5 pieces
• Rugged Carrying case
Note: Save all packing material until you are
sure that the instrument functions
correctly. All defective items must be
returned in the original packing with
the supplied accessories.
The HI 9141 and HI 91410 are portable, mi-
croprocessor-based, printing (and logging
HI 91410 only) meters for Dissolved Oxygen
measurements.
Housed in a rugged and lightweight case,
with an easy-to-read LCD, they are the first
portable D.O. meters in their category to
incorporate a printer. The printer uses plain,
non-fading paper.
They are capable of storing up to 8,000 read-
ings. These readings can be printed and/or
transferred to a computer system for elabora-
tion or permanent storage (HI 91410 only).
An optional HI 9200 infrared transmitter can
be used to interface the HI 91410 to a com-
puter for data transfer.
Dissolved oxygen and temperature measure-
ments can be performed with lab-grade preci-
GENERAL DESCRIPTION
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sion in the field (wastewater treatment, fish-
farming, water analysis, etc.) as well as in
the laboratory without compromising accu-
racy.
Dissolved oxygen is indicated in ppm (parts
per million).
Temperature is compensated for by the meter's
ATC circuitry. Salinity compensation in water
allows direct determination of dissolved oxy-
gen in saline waters and the altitude compen-
sation readjusts for the altitude variance.
The dissolved oxygen probe has a membrane
covering the polarographic sensors and a built-
in thermistor for temperature measurements
and compensation. This permeable PTFE
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 a current flow.