Hanna Instruments HI 9143 User Manual
Instruction Manual
HI 9143 • HI 9145
Portable D.O. Meters
in Water-Resistant Casing
SAMPLE
ppm
°C
HI 9143
Microprocessor
Auto Cal
Dissolved
ON/OFF
Oxygen Meter
CAL
RANGE
HOLD
FACTOR
www.hannainst.com
Dear Customer,
Thank you for choosing a HANNA product.
Please read this instruction manual carefully
before using the instrument.
This manual will provide you with the neces-
sary information for a correct use of the instrument.
If you need additional technical support, do not
hesitate to e-mail us at tech@hannainst.com
These instruments are in compliance with the
CE directives.
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, immediately notify your dealer.
Each meter is supplied complete with:
• HI 76407/4 DO probe with 4 m (13’) cable
• 2 spare membranes with O-rings
• Protective cap
• HI 7041S electrolyte solution (30 mL)
• Batteries (4 x 1.5V AA)
• Instruction manual
• 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.
TABLE OF CONTENTS
Preliminary Examination ............................. 3
General Description..................................... 3
Functional Description - Probe .................... 4
Functional Description - Meter..................... 5
Specifications ............................................. 6
Probe Preparation ....................................... 7
Cali bratio n ................................................... 8
Taking Measurements............................... 10
Altitude Compensation .............................. 12
Salinity Compensation .............................. 13
Probe & Membrane Maintenance .............. 14
Battery Replacement ................................ 16
Accessories.............................................. 17
Warranty ................................................... 18
CE Declaration of Conformity .................... 19
23
GENERAL DESCRIPTION
HI 9143 and HI 9145 are water-resistant
dissolved oxygen meters designed for harsh
outdoor applications, especially waste water
treatment and fish farming.
Simple on-site calibration requires no chemical
solutions. Just expose the probe to air and
press the CAL button. In a few minutes, the
meter is calibrated and ready to use.
The new and improved HI 9143 and HI 9145
measure and display O2 from 0 to 300%, 0 to
45 mg/L and temperature from 0 to 50 °C.
In addition to the features of HI 9145, HI 9143
also supplies the user with compensation of
salinity and altitude factors.
Both meters compensate for the temperature
effect.
HI 9143
Microprocessor
Auto Cal
Dissolved
Oxygen Meter
CAL
ON/OFF
RANGE
FACTOR
85
9
67
23
24
4
19
20
21
22
3
210
SAMPLE
LOBAT
SAMPLE
HOLD
CAL
F1
F2
HOLD
ppm
ppm
%
°C
°C
1
2
10
The dissolved oxygen probe is provided with a
membrane covering the polarographic sensor
elements, 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 passes through the membrane
causes a current to flow from which the oxygen
concentration is determined.
FUNCTIONAL DESCRIPTION - PROBE
3
1
FUNCTIONAL DESCRIPTION - METER
4
6
7
8
9
4
5
6
7
8
9
1. D.O. probe
2. Protective cap
3. Watertight shielded cable
4. Polypropylene body
5. Temperature sensor
6. O-Ring seal
7. AgCl (silver chloride) anode
8. Platinum cathode
9. Oxygen permeable membrane
10. Membrane cap
45
1) Battery compartment
2 ) Probe connector
3) Liquid Crystal Display (LCD)
4) ON/OFF key
5) CAL key, to enter/exit calibration mode
6) FACTOR* key, to select altitude (F1)
and salinity (F2)
2
10
7) UP* and DOWN* arrow keys, to set F1
and F2 values
8) HOLD key, to freeze reading on display
9) RANGE key, to select oxygen measurement range (ppm or % of saturation)
10) Socket for 12 Vdc power adapter
19) “LOW BAT”, low battery indicator
20) “SAMPLE”, measuring mode indicator
21) “F1”, altitude factor* indicator
22) “F2”, salinity factor* indicator
23) “%” or “ppm”, oxygen measure unit
24) Secondary display
(*) HI 9143 only
SPECIFICATIONS
PROBE PREPARATION
HI 9143 HI 9145
Range 0.00 to 45.00 mg/L O
0.0 to 300.0% O
0.0 to 50.0°C
Resolution 0.01 mg/L / 0.1% O
0.1°C
Accuracy (@20°C/68°F)
±1.5% FS (O2)
±0.5°C
Typical EMC Deviation
±0.3 mg/L / ±3.5% O
±0.5 °C
Calibration Automatic, in air, at 100%
Temperature Compensation
Automatic, 0 to 50°C (32 to 122°F)
Altitude Compensation
0 to 1900 m ---
(resolution 100 m)
Salinity Compensation
0 to 40 g/L ---
(resolution 1 g/L)
Probe HI 76407/4 polarographic
with 4 m (13’) cable (included)
Environment 0 to 50°C (32 to 122°F);
RH max 100%
Power Supply
4 x 1.5V AA batteries;
approx. 200 hours of continuous use;
auto-off after 4 hours of inactivity;
or input for 12 Vdc adapter
Dimensions 196 x 80 x 60 mm
(7.7 x 3.1 x 2.4")
Weight 500 g (1.1 lb.)
2
2
2
2
All HANNA D.O. probes are shipped dry. To
hydrate the probe and prepare it for use,
connect it to the meter and proceed as follows.
1. Remove the red & black plas-
Shipping
cap
tic cap used for shipping purposes only.
2. Wet the sensor by soaking
black
the bottom (2.5 cm/1") of the
probe in HI 7041S electrolyte
solution for 5 minutes.
red
3. Rinse the sup-
plied membrane
(HI76407A) with
some electrolyte while shaking it gently.
Refill with fresh
electrolyte.
4. Gently tap the
sides of the
SECOND
FILL
THIRD
TAP
FIRST
INSERT
O’RING
membrane with
your finger to
ensure that no
air bubbles remain trapped.
To avoid any
THEN SCREW
BACK ON
damage, do not
tap the membrane directly on the bottom.
5. Make sure that the rubber O-ring sits properly inside the membrane cap.
6. With the sensor facing down, screw the
cap clockwise. Some electrolyte will overflow.
When not in use, protect the
membrane with the supplied cap.
67
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