Hanna Instruments Combo Grochek HI 991404 User manual

www.hannacan.com
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][email protected]
[email protected][email protected]
[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 Range0.0 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

www.hannacan.com
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][email protected]
[email protected][email protected]
[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 Range0.0 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
e

www.hannacan.com
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][email protected]
[email protected][email protected]
[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 Range0.0 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
ne

www.hannacan.com
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][email protected]
[email protected][email protected]
[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 Range0.0 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
e

ACCESSORIESACCESSORIES
ACCESSORIESACCESSORIES
ACCESSORIES
ToTo
ToTo
To turnturn
turnturn
turn thethe
thethe
the metermeter
metermeter
meter onon
onon
on
Connect the pH electrode to the meter.
Connect the 12VDC adapter to the meter and
to the mains; the display will lit. Press and hold
the MODE button for 2-3 seconds. All the used
segments on the LCD will be visible for a few
seconds.
ToTo
ToTo
To change the temperature unitchange the temperature unit
change the temperature unitchange the temperature unit
change the temperature unit
To change the temperature unit (from °C to °F),
from measurement mode, press and hold the
MODE button until TEMP and the current tem-
perature unit are displayed on the lower LCD.
Eg. TEMP °C.
Use the SET/HOLD button to change the tem-
perature unit, and then press MODE button
twice to return to normal measurement mode.
ToTo
ToTo
To freezefreeze
freezefreeze
freeze thethe
thethe
the displaydisplay
displaydisplay
display
Press and hold the SET/HOLD button for 2-3
seconds until HOLD appears on the secondary
display.
Press either button to return to normal mode.
Taking measurementsTaking measurements
Taking measurementsTaking measurements
Taking measurements
Select the pH, EC or TDS mode with the SET/
HOLD button.
Immerse the probes in the solution to be tested.
In order to ensure better accuracy, probes should
not touch or stand close to the walls or bottom
of the sample vessel.
The pH, EC or TDS value au-
tomatically compensated for
temperature is shown on the
primary LCD while the sec-
ondary LCD shows the
temperature of the sample.
The measurements should be
taken when the stability sym-
bol on the top left of the
LCD disappears.
Note:
Measurements have to be taken with both probes
(pH-electrode and EC/TDS/temperature probe)
immersed in the same vessel.
To change the EC/TDS conversionTo change the EC/TDS conversion
To change the EC/TDS conversionTo change the EC/TDS conversion
To change the EC/TDS conversion
factor (CONV) and the temperaturefactor (CONV) and the temperature
factor (CONV) and the temperaturefactor (CONV) and the temperature
factor (CONV) and the temperature
compensation coefficientcompensation coefficient
compensation coefficientcompensation coefficient
compensation coefficient ββ
ββ
β(BETA)(BETA)
(BETA)(BETA)
(BETA)
OPERATIONAL GUIDE
CALIBRATION
pH calibration buffer setpH calibration buffer set
pH calibration buffer setpH calibration buffer set
pH calibration buffer set
• From pH measurement mode, press and hold
the MODE button until TEMP and the current
temperature unit are displayed on the lower
LCD. Eg. TEMP °C.
• Press the MODE button again to show the
current buffer set: pH 7.01 BUFF (for 4.01/7.01/
10.01 calibration) or pH 6.86 BUFF (for NIST
4.01/6.86/9.18 calibration).
• Press the SET/HOLD button to change the
buffer value.
• Press the MODE button to return to normal
measuring mode.
pH calibration procedurepH calibration procedure
pH calibration procedurepH calibration procedure
pH calibration procedure
From pH measurement mode, press and hold
the MODE button until CAL is displayed on the
pH ELECTRODE MAINTENANCE
• When not in use, rinse the electrode with
water to minimize contamination and store it
with a few drops of storage (HI 70300) or pH 7 (HI
7007) solution in the protective cap after use. DO
NOT USE DISTILLED OR DEIONIZED WATER
FOR STORAGE PURPOSES.
• If the electrode has been left dry, soak in a
storage or pH 7 solution for at least one hour to
reactivate it.
• To prolong the life of the pH electrode, it is
recommended to clean it monthly by immersing
it in the HI 7061 cleaning solution for half an hour.
Afterwards, rinse it thoroughly with tap water
and recalibrate the meter.
ACCESSORIES
HI 1293D Replaceable pH electrode with
differential input & DIN
HI 70004P pH 4.01 solution, 20 mL sachet (25
pcs)
HI 70006P pH 6.86 solution, 20 mL sachet (25
pcs)
HI 70007P pH 7.01 solution, 20 mL sachet (25
pcs)
HI 70009P pH 9.18 solution, 20 mL sachet (25
pcs)
HI 70010P pH 10.01 solution, 20 mL sachet (25
pcs)
HI 77400P pH 4 & 7 solutions, 20 mL sachet (5
each)
HI 7004M pH 4.01 solution, 230 mL bottle
HI 7006M pH 6.86 solution, 230 mL bottle
HI 7007M pH 7.01 solution, 230 mL bottle
HI 7009M pH 9.18 solution, 230 mL bottle
HI 7010M pH 10.01 solution, 230 mL bottle
HI 70030P 12.88 mS/cm @25ºC cal. solution, 20
mL sachet (25 pcs)
HI 70031P 1413 µS/cm @25ºC cal. solution, 20
mL sachet (25 pcs)
HI 70032P 1382 ppm @25ºC cal. solution, 20
mL sachet (25 pcs)
HI 70038P 6.44 ppt @25ºC cal. solution, 20 mL
sachet (25 pcs)
HI 70442P 1500 ppm @25ºC cal. solution, 20
mL sachet (25 pcs)
HI 7061M Electrode cleaning solution, 230 mL
bottle
HI 70300M Electrode storage solution, 230 mL
bottle
HI 710005 12VDC power adapter, US plug
• From measurement mode, press and hold the
MODE button until TEMP and the current tem-
perature unit are displayed on the lower LCD.
Eg. TEMP °C.
• Press the MODE button again to show the
current conversion factor. Eg. 0.50 CONV.
• Press the SET/HOLD button to change the
conversion factor.
• Press the MODE button to show the current
temperature compensation coefficient β. Eg. 2.1
BETA.
• Press the SET/HOLD button to change the
temperature compensation coefficient β.
• Press the MODE button to return to normal
measuring mode.
ToTo
ToTo
To turnturn
turnturn
turn thethe
thethe
the metermeter
metermeter
meter offoff
offoff
off
Press the MODE button while in normal mea-
surement mode. OFF will appear on the lower
part of the display. Release the button. The
display still lits, until the power supply is
connected.
NotesNotes
NotesNotes
Notes:
• Before taking any measurement make sure
the meter has been calibrated.
• To clear a previous calibration, press the
MODE button after entering the calibration
mode. The lower LCD will display ESC for 1
second and the meter will return to normal
measurement mode. The CAL symbol on the
LCD will disappear. The meter will be reset to
the default calibration.
• If measurements are taken in different samples
successively, rinse the probes thoroughly to
eliminate cross-contamination; and after clean-
ing, rinse the probes with some of the sample
to be measured.
lower LCD. Release the button. The LCD will
display pH 7.01 USE (or pH 6.86 USE if you have
selected the NIST buffer set). The CAL tag blinks
on the LCD.
• For a single-point pH calibration, place the
electrode and the probe in any buffer from the
selected buffer set (eg. pH 7.01 or pH 4.01 or
pH 10.01). The meter will recognize the buffer
value automatically.
If using pH 4.01 or pH 10.01, the meter will
display OK for 1 second and then return to
measurement mode.
If using pH 7.01, after recognition of the buffer
the meter will ask for pH 4.01 as second cali-
bration point. Press the MODE button to return
to measurement mode or, if desired, proceed
with the 2-point calibration as explained below.
NoteNote
NoteNote
Note: for better accuracy it is always
recommended to carry out a two-point
calibration.
• For a two-point pH calibration, place the
electrode and the probe in pH 7.01 (or 6.86 if
you have selected the NIST buffer set). The
meter will recognize the buffer value and then
display pH 4.01 USE.
Rinse the electrode thoroughly to eliminate cross-
contamination.
Place the electrode in the second buffer value
(pH 4.01 or 10.01, or, if using NIST, pH 4.01 or
9.18). When the second buffer is recognized,
the LCD will display OK for 1 second and the
meter will return to normal measurement mode.
NoteNote
NoteNote
Note: for storing calibration data in the non-
volatile memory, turn the meter OFF and then
ON again through the MODE button.
The CAL symbol on the LCD means that the
meter is calibrated.
EC calibration procedureEC calibration procedure
EC calibration procedureEC calibration procedure
EC calibration procedure
• From EC measurement mode, press and hold
the MODE button until CAL is displayed on the
lower LCD.
• Release the button and immerse the probe in
the proper calibration solution: HI 70031 (1413
µS/cm) for HI 991404 and HI 70030 (12.88 mS/cm) for
HI 991405.
• Once the calibration has been automatically
performed, the LCD will display OK for 1 second
and the meter will return to normal measure-
ment mode.
• Since there is a known relationship between
EC and TDS readings, it is not necessary to
calibrate the meter in TDS
NoteNote
NoteNote
Note: for storing calibration data in the non-
volatile memory, turn the meter OFF and then
ON again through the MODE button.
The CAL symbol on the LCD means that the
meter is calibrated.

ACCESSORIESACCESSORIES
ACCESSORIESACCESSORIES
ACCESSORIES
ToTo
ToTo
To turnturn
turnturn
turn thethe
thethe
the metermeter
metermeter
meter onon
onon
on
Connect the pH electrode to the meter.
Connect the 12VDC adapter to the meter and
to the mains; the display will lit. Press and hold
the MODE button for 2-3 seconds. All the used
segments on the LCD will be visible for a few
seconds.
ToTo
ToTo
To change the temperature unitchange the temperature unit
change the temperature unitchange the temperature unit
change the temperature unit
To change the temperature unit (from °C to °F),
from measurement mode, press and hold the
MODE button until TEMP and the current tem-
perature unit are displayed on the lower LCD.
Eg. TEMP °C.
Use the SET/HOLD button to change the tem-
perature unit, and then press MODE button
twice to return to normal measurement mode.
ToTo
ToTo
To freezefreeze
freezefreeze
freeze thethe
thethe
the displaydisplay
displaydisplay
display
Press and hold the SET/HOLD button for 2-3
seconds until HOLD appears on the secondary
display.
Press either button to return to normal mode.
Taking measurementsTaking measurements
Taking measurementsTaking measurements
Taking measurements
Select the pH, EC or TDS mode with the SET/
HOLD button.
Immerse the probes in the solution to be tested.
In order to ensure better accuracy, probes should
not touch or stand close to the walls or bottom
of the sample vessel.
The pH, EC or TDS value au-
tomatically compensated for
temperature is shown on the
primary LCD while the sec-
ondary LCD shows the
temperature of the sample.
The measurements should be
taken when the stability sym-
bol on the top left of the
LCD disappears.
Note:
Measurements have to be taken with both probes
(pH-electrode and EC/TDS/temperature probe)
immersed in the same vessel.
To change the EC/TDS conversionTo change the EC/TDS conversion
To change the EC/TDS conversionTo change the EC/TDS conversion
To change the EC/TDS conversion
factor (CONV) and the temperaturefactor (CONV) and the temperature
factor (CONV) and the temperaturefactor (CONV) and the temperature
factor (CONV) and the temperature
compensation coefficientcompensation coefficient
compensation coefficientcompensation coefficient
compensation coefficient ββ
ββ
β(BETA)(BETA)
(BETA)(BETA)
(BETA)
OPERATIONAL GUIDE
CALIBRATION
pH calibration buffer setpH calibration buffer set
pH calibration buffer setpH calibration buffer set
pH calibration buffer set
• From pH measurement mode, press and hold
the MODE button until TEMP and the current
temperature unit are displayed on the lower
LCD. Eg. TEMP °C.
• Press the MODE button again to show the
current buffer set: pH 7.01 BUFF (for 4.01/7.01/
10.01 calibration) or pH 6.86 BUFF (for NIST
4.01/6.86/9.18 calibration).
• Press the SET/HOLD button to change the
buffer value.
• Press the MODE button to return to normal
measuring mode.
pH calibration procedurepH calibration procedure
pH calibration procedurepH calibration procedure
pH calibration procedure
From pH measurement mode, press and hold
the MODE button until CAL is displayed on the
pH ELECTRODE MAINTENANCE
• When not in use, rinse the electrode with
water to minimize contamination and store it
with a few drops of storage (HI 70300) or pH 7 (HI
7007) solution in the protective cap after use. DO
NOT USE DISTILLED OR DEIONIZED WATER
FOR STORAGE PURPOSES.
• If the electrode has been left dry, soak in a
storage or pH 7 solution for at least one hour to
reactivate it.
• To prolong the life of the pH electrode, it is
recommended to clean it monthly by immersing
it in the HI 7061 cleaning solution for half an hour.
Afterwards, rinse it thoroughly with tap water
and recalibrate the meter.
ACCESSORIES
HI 1293D Replaceable pH electrode with
differential input & DIN
HI 70004P pH 4.01 solution, 20 mL sachet (25
pcs)
HI 70006P pH 6.86 solution, 20 mL sachet (25
pcs)
HI 70007P pH 7.01 solution, 20 mL sachet (25
pcs)
HI 70009P pH 9.18 solution, 20 mL sachet (25
pcs)
HI 70010P pH 10.01 solution, 20 mL sachet (25
pcs)
HI 77400P pH 4 & 7 solutions, 20 mL sachet (5
each)
HI 7004M pH 4.01 solution, 230 mL bottle
HI 7006M pH 6.86 solution, 230 mL bottle
HI 7007M pH 7.01 solution, 230 mL bottle
HI 7009M pH 9.18 solution, 230 mL bottle
HI 7010M pH 10.01 solution, 230 mL bottle
HI 70030P 12.88 mS/cm @25ºC cal. solution, 20
mL sachet (25 pcs)
HI 70031P 1413 µS/cm @25ºC cal. solution, 20
mL sachet (25 pcs)
HI 70032P 1382 ppm @25ºC cal. solution, 20
mL sachet (25 pcs)
HI 70038P 6.44 ppt @25ºC cal. solution, 20 mL
sachet (25 pcs)
HI 70442P 1500 ppm @25ºC cal. solution, 20
mL sachet (25 pcs)
HI 7061M Electrode cleaning solution, 230 mL
bottle
HI 70300M Electrode storage solution, 230 mL
bottle
HI 710005 12VDC power adapter, US plug
• From measurement mode, press and hold the
MODE button until TEMP and the current tem-
perature unit are displayed on the lower LCD.
Eg. TEMP °C.
• Press the MODE button again to show the
current conversion factor. Eg. 0.50 CONV.
• Press the SET/HOLD button to change the
conversion factor.
• Press the MODE button to show the current
temperature compensation coefficient β. Eg. 2.1
BETA.
• Press the SET/HOLD button to change the
temperature compensation coefficient β.
• Press the MODE button to return to normal
measuring mode.
ToTo
ToTo
To turnturn
turnturn
turn thethe
thethe
the metermeter
metermeter
meter offoff
offoff
off
Press the MODE button while in normal mea-
surement mode. OFF will appear on the lower
part of the display. Release the button. The
display still lits, until the power supply is
connected.
NotesNotes
NotesNotes
Notes:
• Before taking any measurement make sure
the meter has been calibrated.
• To clear a previous calibration, press the
MODE button after entering the calibration
mode. The lower LCD will display ESC for 1
second and the meter will return to normal
measurement mode. The CAL symbol on the
LCD will disappear. The meter will be reset to
the default calibration.
• If measurements are taken in different samples
successively, rinse the probes thoroughly to
eliminate cross-contamination; and after clean-
ing, rinse the probes with some of the sample
to be measured.
lower LCD. Release the button. The LCD will
display pH 7.01 USE (or pH 6.86 USE if you have
selected the NIST buffer set). The CAL tag blinks
on the LCD.
• For a single-point pH calibration, place the
electrode and the probe in any buffer from the
selected buffer set (eg. pH 7.01 or pH 4.01 or
pH 10.01). The meter will recognize the buffer
value automatically.
If using pH 4.01 or pH 10.01, the meter will
display OK for 1 second and then return to
measurement mode.
If using pH 7.01, after recognition of the buffer
the meter will ask for pH 4.01 as second cali-
bration point. Press the MODE button to return
to measurement mode or, if desired, proceed
with the 2-point calibration as explained below.
NoteNote
NoteNote
Note: for better accuracy it is always
recommended to carry out a two-point
calibration.
• For a two-point pH calibration, place the
electrode and the probe in pH 7.01 (or 6.86 if
you have selected the NIST buffer set). The
meter will recognize the buffer value and then
display pH 4.01 USE.
Rinse the electrode thoroughly to eliminate cross-
contamination.
Place the electrode in the second buffer value
(pH 4.01 or 10.01, or, if using NIST, pH 4.01 or
9.18). When the second buffer is recognized,
the LCD will display OK for 1 second and the
meter will return to normal measurement mode.
NoteNote
NoteNote
Note: for storing calibration data in the non-
volatile memory, turn the meter OFF and then
ON again through the MODE button.
The CAL symbol on the LCD means that the
meter is calibrated.
EC calibration procedureEC calibration procedure
EC calibration procedureEC calibration procedure
EC calibration procedure
• From EC measurement mode, press and hold
the MODE button until CAL is displayed on the
lower LCD.
• Release the button and immerse the probe in
the proper calibration solution: HI 70031 (1413
µS/cm) for HI 991404 and HI 70030 (12.88 mS/cm) for
HI 991405.
• Once the calibration has been automatically
performed, the LCD will display OK for 1 second
and the meter will return to normal measure-
ment mode.
• Since there is a known relationship between
EC and TDS readings, it is not necessary to
calibrate the meter in TDS
NoteNote
NoteNote
Note: for storing calibration data in the non-
volatile memory, turn the meter OFF and then
ON again through the MODE button.
The CAL symbol on the LCD means that the
meter is calibrated.

ACCESSORIESACCESSORIES
ACCESSORIESACCESSORIES
ACCESSORIES
ToTo
ToTo
To turnturn
turnturn
turn thethe
thethe
the metermeter
metermeter
meter onon
onon
on
Connect the pH electrode to the meter.
Connect the 12VDC adapter to the meter and
to the mains; the display will lit. Press and hold
the MODE button for 2-3 seconds. All the used
segments on the LCD will be visible for a few
seconds.
ToTo
ToTo
To change the temperature unitchange the temperature unit
change the temperature unitchange the temperature unit
change the temperature unit
To change the temperature unit (from °C to °F),
from measurement mode, press and hold the
MODE button until TEMP and the current tem-
perature unit are displayed on the lower LCD.
Eg. TEMP °C.
Use the SET/HOLD button to change the tem-
perature unit, and then press MODE button
twice to return to normal measurement mode.
ToTo
ToTo
To freezefreeze
freezefreeze
freeze thethe
thethe
the displaydisplay
displaydisplay
display
Press and hold the SET/HOLD button for 2-3
seconds until HOLD appears on the secondary
display.
Press either button to return to normal mode.
Taking measurementsTaking measurements
Taking measurementsTaking measurements
Taking measurements
Select the pH, EC or TDS mode with the SET/
HOLD button.
Immerse the probes in the solution to be tested.
In order to ensure better accuracy, probes should
not touch or stand close to the walls or bottom
of the sample vessel.
The pH, EC or TDS value au-
tomatically compensated for
temperature is shown on the
primary LCD while the sec-
ondary LCD shows the
temperature of the sample.
The measurements should be
taken when the stability sym-
bol on the top left of the
LCD disappears.
Note:
Measurements have to be taken with both probes
(pH-electrode and EC/TDS/temperature probe)
immersed in the same vessel.
To change the EC/TDS conversionTo change the EC/TDS conversion
To change the EC/TDS conversionTo change the EC/TDS conversion
To change the EC/TDS conversion
factor (CONV) and the temperaturefactor (CONV) and the temperature
factor (CONV) and the temperaturefactor (CONV) and the temperature
factor (CONV) and the temperature
compensation coefficientcompensation coefficient
compensation coefficientcompensation coefficient
compensation coefficient ββ
ββ
β(BETA)(BETA)
(BETA)(BETA)
(BETA)
OPERATIONAL GUIDE
CALIBRATION
pH calibration buffer setpH calibration buffer set
pH calibration buffer setpH calibration buffer set
pH calibration buffer set
• From pH measurement mode, press and hold
the MODE button until TEMP and the current
temperature unit are displayed on the lower
LCD. Eg. TEMP °C.
• Press the MODE button again to show the
current buffer set: pH 7.01 BUFF (for 4.01/7.01/
10.01 calibration) or pH 6.86 BUFF (for NIST
4.01/6.86/9.18 calibration).
• Press the SET/HOLD button to change the
buffer value.
• Press the MODE button to return to normal
measuring mode.
pH calibration procedurepH calibration procedure
pH calibration procedurepH calibration procedure
pH calibration procedure
From pH measurement mode, press and hold
the MODE button until CAL is displayed on the
pH ELECTRODE MAINTENANCE
• When not in use, rinse the electrode with
water to minimize contamination and store it
with a few drops of storage (HI 70300) or pH 7 (HI
7007) solution in the protective cap after use. DO
NOT USE DISTILLED OR DEIONIZED WATER
FOR STORAGE PURPOSES.
• If the electrode has been left dry, soak in a
storage or pH 7 solution for at least one hour to
reactivate it.
• To prolong the life of the pH electrode, it is
recommended to clean it monthly by immersing
it in the HI 7061 cleaning solution for half an hour.
Afterwards, rinse it thoroughly with tap water
and recalibrate the meter.
ACCESSORIES
HI 1293D Replaceable pH electrode with
differential input & DIN
HI 70004P pH 4.01 solution, 20 mL sachet (25
pcs)
HI 70006P pH 6.86 solution, 20 mL sachet (25
pcs)
HI 70007P pH 7.01 solution, 20 mL sachet (25
pcs)
HI 70009P pH 9.18 solution, 20 mL sachet (25
pcs)
HI 70010P pH 10.01 solution, 20 mL sachet (25
pcs)
HI 77400P pH 4 & 7 solutions, 20 mL sachet (5
each)
HI 7004M pH 4.01 solution, 230 mL bottle
HI 7006M pH 6.86 solution, 230 mL bottle
HI 7007M pH 7.01 solution, 230 mL bottle
HI 7009M pH 9.18 solution, 230 mL bottle
HI 7010M pH 10.01 solution, 230 mL bottle
HI 70030P 12.88 mS/cm @25ºC cal. solution, 20
mL sachet (25 pcs)
HI 70031P 1413 µS/cm @25ºC cal. solution, 20
mL sachet (25 pcs)
HI 70032P 1382 ppm @25ºC cal. solution, 20
mL sachet (25 pcs)
HI 70038P 6.44 ppt @25ºC cal. solution, 20 mL
sachet (25 pcs)
HI 70442P 1500 ppm @25ºC cal. solution, 20
mL sachet (25 pcs)
HI 7061M Electrode cleaning solution, 230 mL
bottle
HI 70300M Electrode storage solution, 230 mL
bottle
HI 710005 12VDC power adapter, US plug
• From measurement mode, press and hold the
MODE button until TEMP and the current tem-
perature unit are displayed on the lower LCD.
Eg. TEMP °C.
• Press the MODE button again to show the
current conversion factor. Eg. 0.50 CONV.
• Press the SET/HOLD button to change the
conversion factor.
• Press the MODE button to show the current
temperature compensation coefficient β. Eg. 2.1
BETA.
• Press the SET/HOLD button to change the
temperature compensation coefficient β.
• Press the MODE button to return to normal
measuring mode.
ToTo
ToTo
To turnturn
turnturn
turn thethe
thethe
the metermeter
metermeter
meter offoff
offoff
off
Press the MODE button while in normal mea-
surement mode. OFF will appear on the lower
part of the display. Release the button. The
display still lits, until the power supply is
connected.
NotesNotes
NotesNotes
Notes:
• Before taking any measurement make sure
the meter has been calibrated.
• To clear a previous calibration, press the
MODE button after entering the calibration
mode. The lower LCD will display ESC for 1
second and the meter will return to normal
measurement mode. The CAL symbol on the
LCD will disappear. The meter will be reset to
the default calibration.
• If measurements are taken in different samples
successively, rinse the probes thoroughly to
eliminate cross-contamination; and after clean-
ing, rinse the probes with some of the sample
to be measured.
lower LCD. Release the button. The LCD will
display pH 7.01 USE (or pH 6.86 USE if you have
selected the NIST buffer set). The CAL tag blinks
on the LCD.
• For a single-point pH calibration, place the
electrode and the probe in any buffer from the
selected buffer set (eg. pH 7.01 or pH 4.01 or
pH 10.01). The meter will recognize the buffer
value automatically.
If using pH 4.01 or pH 10.01, the meter will
display OK for 1 second and then return to
measurement mode.
If using pH 7.01, after recognition of the buffer
the meter will ask for pH 4.01 as second cali-
bration point. Press the MODE button to return
to measurement mode or, if desired, proceed
with the 2-point calibration as explained below.
NoteNote
NoteNote
Note: for better accuracy it is always
recommended to carry out a two-point
calibration.
• For a two-point pH calibration, place the
electrode and the probe in pH 7.01 (or 6.86 if
you have selected the NIST buffer set). The
meter will recognize the buffer value and then
display pH 4.01 USE.
Rinse the electrode thoroughly to eliminate cross-
contamination.
Place the electrode in the second buffer value
(pH 4.01 or 10.01, or, if using NIST, pH 4.01 or
9.18). When the second buffer is recognized,
the LCD will display OK for 1 second and the
meter will return to normal measurement mode.
NoteNote
NoteNote
Note: for storing calibration data in the non-
volatile memory, turn the meter OFF and then
ON again through the MODE button.
The CAL symbol on the LCD means that the
meter is calibrated.
EC calibration procedureEC calibration procedure
EC calibration procedureEC calibration procedure
EC calibration procedure
• From EC measurement mode, press and hold
the MODE button until CAL is displayed on the
lower LCD.
• Release the button and immerse the probe in
the proper calibration solution: HI 70031 (1413
µS/cm) for HI 991404 and HI 70030 (12.88 mS/cm) for
HI 991405.
• Once the calibration has been automatically
performed, the LCD will display OK for 1 second
and the meter will return to normal measure-
ment mode.
• Since there is a known relationship between
EC and TDS readings, it is not necessary to
calibrate the meter in TDS
NoteNote
NoteNote
Note: for storing calibration data in the non-
volatile memory, turn the meter OFF and then
ON again through the MODE button.
The CAL symbol on the LCD means that the
meter is calibrated.

ACCESSORIESACCESSORIES
ACCESSORIESACCESSORIES
ACCESSORIES
ToTo
ToTo
To turnturn
turnturn
turn thethe
thethe
the metermeter
metermeter
meter onon
onon
on
Connect the pH electrode to the meter.
Connect the 12VDC adapter to the meter and
to the mains; the display will lit. Press and hold
the MODE button for 2-3 seconds. All the used
segments on the LCD will be visible for a few
seconds.
ToTo
ToTo
To change the temperature unitchange the temperature unit
change the temperature unitchange the temperature unit
change the temperature unit
To change the temperature unit (from °C to °F),
from measurement mode, press and hold the
MODE button until TEMP and the current tem-
perature unit are displayed on the lower LCD.
Eg. TEMP °C.
Use the SET/HOLD button to change the tem-
perature unit, and then press MODE button
twice to return to normal measurement mode.
ToTo
ToTo
To freezefreeze
freezefreeze
freeze thethe
thethe
the displaydisplay
displaydisplay
display
Press and hold the SET/HOLD button for 2-3
seconds until HOLD appears on the secondary
display.
Press either button to return to normal mode.
Taking measurementsTaking measurements
Taking measurementsTaking measurements
Taking measurements
Select the pH, EC or TDS mode with the SET/
HOLD button.
Immerse the probes in the solution to be tested.
In order to ensure better accuracy, probes should
not touch or stand close to the walls or bottom
of the sample vessel.
The pH, EC or TDS value au-
tomatically compensated for
temperature is shown on the
primary LCD while the sec-
ondary LCD shows the
temperature of the sample.
The measurements should be
taken when the stability sym-
bol on the top left of the
LCD disappears.
Note:
Measurements have to be taken with both probes
(pH-electrode and EC/TDS/temperature probe)
immersed in the same vessel.
To change the EC/TDS conversionTo change the EC/TDS conversion
To change the EC/TDS conversionTo change the EC/TDS conversion
To change the EC/TDS conversion
factor (CONV) and the temperaturefactor (CONV) and the temperature
factor (CONV) and the temperaturefactor (CONV) and the temperature
factor (CONV) and the temperature
compensation coefficientcompensation coefficient
compensation coefficientcompensation coefficient
compensation coefficient ββ
ββ
β(BETA)(BETA)
(BETA)(BETA)
(BETA)
OPERATIONAL GUIDE
CALIBRATION
pH calibration buffer setpH calibration buffer set
pH calibration buffer setpH calibration buffer set
pH calibration buffer set
• From pH measurement mode, press and hold
the MODE button until TEMP and the current
temperature unit are displayed on the lower
LCD. Eg. TEMP °C.
• Press the MODE button again to show the
current buffer set: pH 7.01 BUFF (for 4.01/7.01/
10.01 calibration) or pH 6.86 BUFF (for NIST
4.01/6.86/9.18 calibration).
• Press the SET/HOLD button to change the
buffer value.
• Press the MODE button to return to normal
measuring mode.
pH calibration procedurepH calibration procedure
pH calibration procedurepH calibration procedure
pH calibration procedure
From pH measurement mode, press and hold
the MODE button until CAL is displayed on the
pH ELECTRODE MAINTENANCE
• When not in use, rinse the electrode with
water to minimize contamination and store it
with a few drops of storage (HI 70300) or pH 7 (HI
7007) solution in the protective cap after use. DO
NOT USE DISTILLED OR DEIONIZED WATER
FOR STORAGE PURPOSES.
• If the electrode has been left dry, soak in a
storage or pH 7 solution for at least one hour to
reactivate it.
• To prolong the life of the pH electrode, it is
recommended to clean it monthly by immersing
it in the HI 7061 cleaning solution for half an hour.
Afterwards, rinse it thoroughly with tap water
and recalibrate the meter.
ACCESSORIES
HI 1293D Replaceable pH electrode with
differential input & DIN
HI 70004P pH 4.01 solution, 20 mL sachet (25
pcs)
HI 70006P pH 6.86 solution, 20 mL sachet (25
pcs)
HI 70007P pH 7.01 solution, 20 mL sachet (25
pcs)
HI 70009P pH 9.18 solution, 20 mL sachet (25
pcs)
HI 70010P pH 10.01 solution, 20 mL sachet (25
pcs)
HI 77400P pH 4 & 7 solutions, 20 mL sachet (5
each)
HI 7004M pH 4.01 solution, 230 mL bottle
HI 7006M pH 6.86 solution, 230 mL bottle
HI 7007M pH 7.01 solution, 230 mL bottle
HI 7009M pH 9.18 solution, 230 mL bottle
HI 7010M pH 10.01 solution, 230 mL bottle
HI 70030P 12.88 mS/cm @25ºC cal. solution, 20
mL sachet (25 pcs)
HI 70031P 1413 µS/cm @25ºC cal. solution, 20
mL sachet (25 pcs)
HI 70032P 1382 ppm @25ºC cal. solution, 20
mL sachet (25 pcs)
HI 70038P 6.44 ppt @25ºC cal. solution, 20 mL
sachet (25 pcs)
HI 70442P 1500 ppm @25ºC cal. solution, 20
mL sachet (25 pcs)
HI 7061M Electrode cleaning solution, 230 mL
bottle
HI 70300M Electrode storage solution, 230 mL
bottle
HI 710005 12VDC power adapter, US plug
• From measurement mode, press and hold the
MODE button until TEMP and the current tem-
perature unit are displayed on the lower LCD.
Eg. TEMP °C.
• Press the MODE button again to show the
current conversion factor. Eg. 0.50 CONV.
• Press the SET/HOLD button to change the
conversion factor.
• Press the MODE button to show the current
temperature compensation coefficient β. Eg. 2.1
BETA.
• Press the SET/HOLD button to change the
temperature compensation coefficient β.
• Press the MODE button to return to normal
measuring mode.
ToTo
ToTo
To turnturn
turnturn
turn thethe
thethe
the metermeter
metermeter
meter offoff
offoff
off
Press the MODE button while in normal mea-
surement mode. OFF will appear on the lower
part of the display. Release the button. The
display still lits, until the power supply is
connected.
NotesNotes
NotesNotes
Notes:
• Before taking any measurement make sure
the meter has been calibrated.
• To clear a previous calibration, press the
MODE button after entering the calibration
mode. The lower LCD will display ESC for 1
second and the meter will return to normal
measurement mode. The CAL symbol on the
LCD will disappear. The meter will be reset to
the default calibration.
• If measurements are taken in different samples
successively, rinse the probes thoroughly to
eliminate cross-contamination; and after clean-
ing, rinse the probes with some of the sample
to be measured.
lower LCD. Release the button. The LCD will
display pH 7.01 USE (or pH 6.86 USE if you have
selected the NIST buffer set). The CAL tag blinks
on the LCD.
• For a single-point pH calibration, place the
electrode and the probe in any buffer from the
selected buffer set (eg. pH 7.01 or pH 4.01 or
pH 10.01). The meter will recognize the buffer
value automatically.
If using pH 4.01 or pH 10.01, the meter will
display OK for 1 second and then return to
measurement mode.
If using pH 7.01, after recognition of the buffer
the meter will ask for pH 4.01 as second cali-
bration point. Press the MODE button to return
to measurement mode or, if desired, proceed
with the 2-point calibration as explained below.
NoteNote
NoteNote
Note: for better accuracy it is always
recommended to carry out a two-point
calibration.
• For a two-point pH calibration, place the
electrode and the probe in pH 7.01 (or 6.86 if
you have selected the NIST buffer set). The
meter will recognize the buffer value and then
display pH 4.01 USE.
Rinse the electrode thoroughly to eliminate cross-
contamination.
Place the electrode in the second buffer value
(pH 4.01 or 10.01, or, if using NIST, pH 4.01 or
9.18). When the second buffer is recognized,
the LCD will display OK for 1 second and the
meter will return to normal measurement mode.
NoteNote
NoteNote
Note: for storing calibration data in the non-
volatile memory, turn the meter OFF and then
ON again through the MODE button.
The CAL symbol on the LCD means that the
meter is calibrated.
EC calibration procedureEC calibration procedure
EC calibration procedureEC calibration procedure
EC calibration procedure
• From EC measurement mode, press and hold
the MODE button until CAL is displayed on the
lower LCD.
• Release the button and immerse the probe in
the proper calibration solution: HI 70031 (1413
µS/cm) for HI 991404 and HI 70030 (12.88 mS/cm) for
HI 991405.
• Once the calibration has been automatically
performed, the LCD will display OK for 1 second
and the meter will return to normal measure-
ment mode.
• Since there is a known relationship between
EC and TDS readings, it is not necessary to
calibrate the meter in TDS
NoteNote
NoteNote
Note: for storing calibration data in the non-
volatile memory, turn the meter OFF and then
ON again through the MODE button.
The CAL symbol on the LCD means that the
meter is calibrated.

www.hannacan.com
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][email protected]
[email protected][email protected]
[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 Range0.0 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