w w w . h a n n a c a n . c o m
Hanna Instruments reserves the right to modify the design, con-
struction and appearance of its products without advance notice.
WARRANTY
HI 991404
and
HI 991405
are
warranted for two years
against defects in
workmanship and materials when used for their intended
purpose and maintained according to instructions.
The probes
are 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 maintenance are not covered.
If service is required, contact the dealer from whom you
purchased the instrument. 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
shipment 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, Hanna Instruments Inc.
Instruction Manual
(HI 991404 - HI 991405)
Dear Customer,
Thank you for choosing a Hanna product. This
manual will provide you with the necessary in-
formation for a correct operation. Please read it
carefully before using the meter. If you need
additional technical information, do not hesitate
to e-mail us at [email protected]
These instruments are in compliance with the
directives.
Remove the instrument from the packing mate-
rial and examine it carefully. If any damage has
occurred during shipment, immediately notify
your Dealer or the nearest Hanna Customer
Service Center.
The meters are supplied with:
•
pH 4.01 and 7.01 buffer solutions (20 mL each);
•
HI 70031
1413 µS/cm calibration solution, for
HI
991404
;
•
HI 70030
12.88 mS/cm calibration solution, for
HI
991405
;
•
HI 1293D
pH-electrode with differential input signal;
• Hanna 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 re-
turned in its original packing.
PRELIMINARY EXAMINATION
COMBO
is a combined pH/tempera-
ture/EC/TDS meter specially designed to
meet the needs of growers in greenhouses
and hydroponic applications.
You can simply install the meter above the
sample to be tested for continuous
measurement.
The
HI 1293D
pH-electrode & the EC/TDS/
Temperature probe have been molded with
pipe thread (1/2’’ NPT), which allows the
user to attach them to an in-line system.
Measurements are accurate and the meter
can be calibrated at one or two points for
pH and at single point for EC/TDS.
You no longer need to worry about battery
changes either: the unit runs without
interruption on 12 VDC power supply.
GENERAL DESCRIPTION
FUNCTIONAL DESCRIPTION
These Instruments are in
Compliance with CE
Directives
SPECIFICATIONS
Recommendations for Users
Before using this product, make sure that it is entirely
suitable for the environment in which it is used. Operation
of this instrument in residential areas could cause unac-
ceptable interferences to radio and TV equipment.
The glass bulb at the end of the electrode is sensitive to
electrostatic discharges. Avoid touching this glass bulb at all
times. During operation, ESD wrist straps should be worn to
avoid possible damage to the electrode by electrostatic
discharges.
Any variation introduced by the user to the supplied equip-
ment may degrade the instrument’s EMC performance.
To avoid electrical shock, do not use this instrument when
voltages at the measurement surface exceed 24 VAC or 60
VDC. To avoid damages or burns, do not perform any
measurement in microwave ovens.
ISTR991404R1 05/02
HI 991404
EC/TDS Range
0 to 3999 µS/cm
0 to 2000 ppm
Resolution
1 µS/cm - 1 ppm
Accuracy (@20ºC/68ºF)
±2% f.s.
Typical EMC Deviation
±2.5 f.s.
HI 991405
EC/TDS Range
0.00 to 20.00 mS/cm
0.00 to 10.00 ppt
Resolution
0.01 mS/cm - 0.01 ppt
Accuracy (@20ºC/68ºF)
±2% f.s.
Typical EMC deviation
±2.5% f.s.
Common specifications
pH Range
0.0 to 14.0 pH
Temperature Range
0.0 to 60ºC (32.0 to 140ºF)
Resolution
0.1 pH
0.1ºC or 0.1ºF
Accuracy (@20ºC/68ºF)
±0.1 pH
±0.5 ºC or ±1ºF
Typical EMC Deviation
±0.1 pH
±1 ºC or ±2 ºF
Temp.Compensation pH
Automatic
EC/TDS
β
=0.0 to 2.4%/ºC
TDS Conversion factor
0.45 to 1.00 (CONV)
pH electrode
HI 1293D
(
included
)
pH Calibration
At 1 or 2 points
with auto-buffer recognition
EC/TDS Calibration
Automatic at 1 point
Power supply
12VDC power adapter (
included
)
Environment
0 to 50ºC (32 to 122ºF);
RH 95% non-condensing
Dimensions (meter only)
160 x 105 x 31 mm
(6.2 x 4.1 x 1.2’’)
Weight (meter only)
190 g (6.7 oz.)
1. Liquid Crystal Display
2. ON/OFF/MODE button
3. Power supply connector
4. 12 VDC power adapter
5.
HI 1293D
pH-electrode with differential
input, pipe thread 1/2’’ NPT
6. EC/TDS/Temperature probe, pipe
thread 1/2’’ NPT
(works also as matching pin for pH-
electrode)
7. DIN connector
8. SET/HOLD button
