Hanna Instruments HI 9146 User Manual
Instruction Manual
HI 9146
Portable Waterproof
Microprocessor
Dissolved Oxygen Meter
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 necessary
information for a correct use of the instrument,
as well as a precise idea of its versatility.
If you need more technical information, do not
hesitate to e-mail us at tech@hannainst.com
This meter is in compliance with directives.
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
Measurement ............................................ 10
Altitude Compensation .............................. 12
Salinity Compensation .............................. 13
Probe & Membrane Maintenance .............. 14
Battery Replacement ................................ 16
Accessories.............................................. 17
Warranty ................................................... 18
CE Declaration of Conformity .................... 19
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 76407/4F DO probe with 4 m cable and
protective sleeve for HI9146-04
• HI 76407/10F DO probe with 10 m cable &
protective sleeve for HI9146-10
• 2 membranes (HI 76407A) with O-rings
• protective cap
• 30 mL electrolyte solution (HI 7041S)
• 4 x 1.5V AA batteries
• 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.
GENERAL DESCRIPTION
The Hanna HI 9146 is a water-resistant,
microprocessor-based, auto-calibrating
Dissolved Oxygen meter with ATC. It has 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.
23
Salinity compensation in water allows
determination of mg/L of dissolved oxygen in
salty waters and the altitude compensation
readjusts for the altitude variance.
Four 1.5V AA alkaline batteries provide power
and make the instrument completely portable.
HI 9146 is also designed to be used with a battery
recharger or a 12 Vdc power supply. A 12 Vdc
input jack is incorporated into the housing.
A microprocessor ensures an accurate and
rapid calibration and measurement. The case
rugged and water-resistant for maximum
protection in the field as well as in the laboratory.
The dissolved oxygen probe has 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
1. D.O. Probe
2. Protective Cap
3. Watertight Shielded
Cable
4. Polypropylene
Probe Body
5. Temperature Sensor
6. O-Ring Seal
7. AgCl Anode (sensor
element)
8. Platinum Cathode
(sensor element)
9. Oxygen Permeable
PTFE Membrane
10. Membrane Protective Cap
6
7
8
9
3
4
4
5
6
7
8
9
FUNCTIONAL DESCRIPTION - METER
1) Battery Compartment
2) Probe Connector
3) Liquid Crystal Display
4) ON/OFF key
5) CAL key (to enter/exit calibration mode)
6) FACTOR key (to select altitude F1 and
salinity F2)
1
7) UP and DOWN arrow keys (to select F1
and F2 levels)
8) HOLD key (to freeze displayed value)
9) RANGE key (to select ppm or % of
saturation)
10) Power socket for 12 Vdc adapter
19) LOW BAT indicator
20) SAMPLE indicator (to indicate measure-
2
10
ment mode)
21) F1 indicator (altitude factor)
22) F2 indicator (salinity factor)
23) % or ppm mode indicator
24) Temperature and factor display
45
SPECIFICATIONS
PROBE PREPARATION
Range 0.00 to 45.00 mg/L O
0.0 to 300 %O
0.0 to 50.0 °C
Resolution 0.01 mg/L O
0.1 %O
0.1 °C
Accuracy ±1.5% Full Scale mg/L O
(@25°C/77°F) ±1.5% Full Scale %O
±0.5 °C
Typical EMC ±0.3 mg/L O2 / ±3.5 %O
Deviation ±0.5 °C
Calibration Automatic in saturated air
Temperature Automatic from 0 to 50°C
Compensation (32 to 122°F)
Altitude 0 to 4 km
Compensation 100 m resolution
Salinity 0 to 80 g/L
Compensation 1 g/L resolution
Environment 0 to 50°C (32 to 122°F)
RH 100%
Power supply • 4x1.5V AA batteries;
200 hours of continuous use;
auto-off after 4 hours.
• 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 probes are shipped dry by Hanna Instruments. To hydrate the probe and prepare it
for use, connect it to the meter and proceed
as follows.
1 Remove the red and black plas-
Shipping
cap
tic cap which is for shipping
purposes and can be discarded.
2
2
2
2 Wet the sensor by soaking the
bottom 2½ cm (1") of the probe
in electrolyte (HI 7041S) for 5
minutes.
black
red
3 Take a membrane
(HI 76407A sup-
plied with the
meter) and Make
sure that the rubber O-ring sits
SECOND
FILL
FIRST
INSERT
O’RING
properly inside
the membrane
cap.
THIRD
TAP
4 Rinse the mem-
brane with electrolyte while shaking
it gently. Refill
with clean electrolyte.
THEN SCREW
BACK ON
5 Gently tap the sides of the membrane cap
with your finger tip to ensure that no air
bubbles remain trapped. To avoid damaging to the membrane, do not tap the membrane directly on the bottom.
6 With the sensor facing down, screw the
cap clockwise. Some electrolyte will overflow.
When not in use, protect the membrane by placing the protective cap
on it.
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