Instruction Manual
(HI 981402C)
On-line, pH Monitor for
CO
2
Dosing Control
W A R R A N T Y
This instrument is guaranteed for two years
against defects in work-
manship and materials when used for their intended purpose and maintained
according to instructions.
The electrode is warranted for a period of
six months.
This warranty is limited to repair or replacement free of charge.
Damages due to accident, misuse, tampering or lack of prescribed mainte-
nance are not covered.
If service is required, contact the dealer from whom you purchased the instru-
ment. If under warranty, report the model number, date of purchase, serial
number and the nature of the failure. If the repair is not covered by the
warranty, you will be notified of the charges incurred. If the instrument is to be
returned to Hanna Instruments, first obtain a Returned Goods Authorization
Number from the Customer Service department and then send it with ship-
ment costs prepaid. When shipping any instrument, make sure it is properly
packaged for complete protection.
All rights are reserved. Reproduction in whole or in part is prohibited
without the written consent of the copyright owner.
Dear Customer,
Thank you for choosing a Hanna product.
Please read this instruction manual carefully before using the
meter. If you need additional technical information, do not
hesitate to e-mail us at
.
This instrument is in compliance with the
directives.
PRELIMINARY EXAMINATION
Remove the instrument from the packing material and examine
it carefully. If any damage has occurred during shipment,
immediately notify your Dealer or the nearest Hanna Customer
Service Center.
Each meter is supplied with:
•
HI 1230B/2C
pH electrode with ceramic junction, gel,
BNC protective sheath and 2 m (6.6’) cable
• pH 4 and pH 7 buffer sachets
• Calibration screwdriver
• 12 Vdc power adapter
• Instruction manual
Note:
Conserve all packing material until the instrument has
been observed to function correctly. Any defective item
must be returned in its original packing.
GENERAL DESCRIPTION
The
CO
2
Aquadose
is an accurate and safe instrument specially
designed to dose CO
2
in planted aquariums.
• Accurate: optimal dosing, based on pH measurement.
• Safe: operated with 12 Vdc power to prevent the risk of electric
shock in combination with water.
This instrument is the ideal device to control the CO
2
level and flow
in your aquarium as it is done by pH control.
When the measured pH value exceeds the (user selectable) setpoint,
the red alarm LED starts blinking and the instrument provides
12Vdc on the plug (#8 on the functional description figure) to
activate the valve of your CO
2
dosing system.
The dosing of CO
2
stops automatically when the desired pH value
is reached.
The pH measurements are highly accurate and the meter can be
calibrated at one or two points.
• Featuring: setpoint selection, alarm LED, direct powering of the
magnetvalve, IP54 sealed housing (vapors and humidity),
waterproof BNC protection.
1. Molded eye
2. Alarm LED
3. pH 4 calibration trimmer
4. Power supply connector
5. 12 Vdc power adapter
6.
HI 1230B/2C
pH electrode with 2 m (6.6’) cable
7.
HI 1283
matching pin with 2 m (6.6’) cable
8. Plug (DIN43650-B) for 12 Vdc magnetvalve power
feeding, 1 m (3.3’) cable
9. Protective sheath
10. BNC connector
11. pH 7 calibration trimmer
12. Liquid Crystal Display
pH ELECTRODE CONNECTION & MAINTENANCE
For maximum protection against vapors and humid-
ity, the BNC connector is shielded behind a waterproof
sheath.
• Slide the protective sheath down. Connect the pH
electrode to the BNC connector and then slide the
protective sheath back up. To ensure maximum
waterproof protection, make sure the connector is
completely covered.
• Do not be alarmed if white crystals appear around the
electrode protective cap. This is normal with pH electrodes
and they dissolve when rinsed with water.
• If the electrode is dry, soak the tip in a storage (
HI 70300
)
or pH 7 (
HI 7007
) solution for 1 hour to reactivate it.
• To minimize clogging and provide longer life for the pH
electrode, it is recommended to clean it monthly. Immerse
the tip of the electrode in
HI 7061
cleaning solution for one
hour and then rinse it with tap water.
• When not in use, rinse the electrode with water and store it
with a few drops of
HI 70300
storage solution in the
protective cap. Always replace the protective cap after use.
NEVER USE DISTILLED OR DEIONIZED WATER FOR STORAGE
PURPOSES.
Range
0.0 to 14.0 pH
Resolution
0.1 pH
Accuracy
(@25°C/77°F)
±0.2 pH
Typical EMC Deviation
±0.2 pH
Calibration
Manual, 2 point, through trimmers
Setpoint
Set at 6.1 pH - user adjustable from 5.0 to 8.0 pH
Hysteresis
0.1 pH around setpoint
Alarm
LED blinks when measure exceeds setpoint value
Output Contact
Power on when measure > setpoint;
supporting max. 12 Vdc/500 mA magnetvalve (*)
pH Electrode
HI 1230B/2C
(included)
Casing
IP54
Power supply
12 Vdc power adapter (included)
Dimensions
86 x 94 x 33 mm (3.4 x 3.7 x 1.3”)
Weight
160 g (5.6 oz.)
(*) Limited by supplied power adapter. If higher power output is needed,
use proper power adapter.
FUNCTIONAL DESCRIPTION
S P E C I F I C A T I O N S
w w w . h a n n a i n s t . c o m
Hanna Instruments reserves the right to modify the design, construction and
appearance of its products without advance notice.
