Hanna Instruments HI 981504 User Manual
Instruction Manual
HI 981504
pH, TDS, Temperature
Monitor
www.hannainst.com
Dear Customer,
Thank you for choosing a Hanna product.
Please read carefully this instruction manual before using the
meter. If you need additional technical information, do not
hesitate to e-mail us at tech@hannainst.com.
These instruments are 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 1286 pH electrode
• HI 7634 TDS probe & temperature probe (fixed)
• pH 4 & pH 7 buffer sachets, 1 pc. each
• HI 70032 (1382 ppm) sachet for HI 981504/5 or
HI 70442 (1500 ppm) sachet for HI 981504/7
• HI 700661 cleaning solution sachet, 2 pcs
• Screwdriver, 12 Vdc power adapter & instructions
Note: Conserve all packing material until the instrument has
been observed to function correctly. Any defective item
must be returned in its original packing.
FUNCTIONAL DESCRIPTION SPECIFICATIONS
Range pH 0.0 to 14.0 pH
TDS 0 to 1990 ppm
Temperature -10.0 to 60.0°C / -14.0 to 140.0°F
Resolution pH 0.1 pH
TDS 10 ppm
Temperature 0.1°C / 0.1°F
Accuracy pH ±0.2 pH
TDS ±2% f.s.
Temperature ±0.3°C / ±0.5°F
TDS Factor 0.5 (HI 981504/5) or 0.7 (HI 981504/7)
Calibration pH Manual, 2 point, through trimmers
TDS Manual, 1 point, through trimmer
Temperature Factory calibrated
Probes pH HI 1286 (included)
TDS HI 7634 (fixed)
Temperature Stainless steel, 2 m cable (fixed)
Temperature Automatic, 5 to 50°C (41 to 122°F),
Compensation for TDS readings only
Environment 0 to 50 °C (32 to 122°F); RH max 95%
Power Supply 12 Vdc power adapter (included)
Dimensions 160 x 110 x 35 mm (6.3x4.3x1.4’’)
Weight 560 g (1.2 lb.)
WARRANTY
These instruments are guaranteed for two years against
defects in workmanship and materials when used for their
intended purpose and maintained according to instructions.
Probes are guaranteed for one year. This warranty is
limited to repair or replacement free of charge. Damages due to
accidents, 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.
GENERAL DESCRIPTION
HI 981504 has been designed for continuously and simultaneously monitoring pH, TDS and temperature.
Simply install the HI 981504 above the sample to be tested,
plug the instrument to the mains and immerse the probes.
pH, TDS and temperature measurements will be simultaneously
displayed on three backlit LCDs.
The user can easily select the temperature unit (°C or °F)
through a switch on the rear panel.
The HI 1286 gel-filled pH electrode is provided with a waterproof sheath to protect the BNC connector. The unique design of
the electrode provides longer life even in aggressive solutions.
The HI 7634 TDS probe is easy to clean and requires little
maintenance.
Measurements are accurate and the meter can be calibrated at
one or two points for pH, and at a single point for TDS.
Temperature range is factory calibrated.
Two models are available:
• HI 981504/5 with 0.5 TDS factor
• HI 981504/7 with 0.7 TDS factor
1. Backlit LCD for pH readings
2. pH calibration trimmers
3. Backlit LCD for TDS readings
4. TDS calibration trimmer
5. Backlit LCD for temperature readings
6. BNC connector (pH electrode)
7. Protective sheath for BNC connector
8. HI 1286 pH electrode
9. HI 7634 TDS probe (fixed)
10. Temperature probe (fixed)
11. 12 Vdc power adapter
12. Power supply connector
Recommendations for Users
Before using these products, make sure that they are entirely suitable for the environment in
which it is used. Operation of these instruments in residential areas could cause unacceptable
interferences to radio and TV equipment. The glass bulb at the end of the electrode is
sensitive to electrostatic discharges. Avoid touching the 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 equipment may degrade the
instruments’ EMC performance. To avoid electrical shock, do not use this instrument when
voltage at the measurement surface exceeds 24 Vac or 60 Vdc. To avoid damage or burns, do
not perform any measurement in microwave ovens.
Hanna Instruments reserves the right to modify the design,
construction and appearance of its products without advance notice.
°C/°F SELECTION
TDS CALIBRATION
pH ELECTRODE MAINTENANCE
ACCESSORIES
• The user can easily select the temperature unit, in degrees
Celsius (default) or Fahrenheit through a switch on the rear
panel.
• Remove the label and set the switch to the desired position.
Replace the label for better protection against humidity.
pH ELECTRODE CONNECTION
In order to protect the instrument against vapors
and humidity, the BNC connector is protected with
a waterproof sheath.
• Slide the protective sheath down. Connect the
pH electrode to the BNC socket and then slide
the protective sheath back up. For 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.
pH CALIBRATION
• Turn the meter on.
• Pour a small quantity of the proper calibration solution (HI
7032 for HI 981504/5 or HI 70442 for HI 981504/7) in a
beaker. If possible, use plastic beakers to minimize any EMC
interference.
• Immerse the TDS probe in the solution, making sure that
the metal pins are completely submerged.
Note: For best accuracy, the probe body should not touch nor
stand close to the side walls of the beaker.
• Wait for a couple of minutes for thermal equilibrium to be
reached and the temperature to be compensated.
• Tap the probe gently on the bottom and shake it, to make
sure no air bubbles have remained trapped inside.
• Adjust the calibration trimmer with the supplied screwdriver
until the display shows “1380” ppm (HI 981504/5) or
“1500” ppm (HI 981504/7)
Calibration is now complete.
TAKING MEASUREMENTS
• 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.
DO NOT USE DISTILLED OR DEIONIZED WATER FOR STORAGE PURPOSES.
• If the electrode has been left dry, soak the tip in HI 70300
storage solution overnight to reactivate it.
• To minimize clogging and provide longer life for the pH
electrode, it is recommended to clean it at least once a
week. Immerse the tip of the electrode in the HI 700661
cleaning solution supplied with the instrument, for half an
hour and then rinse it with tap water.
TDS PROBE MAINTENANCE
HI 1286 Double junction, plastic body pH electrode with 2
m (6.6’) cable and BNC connector
HI 7634* TDS probe with 2 m (6.6’) cable
HI 70004P pH 4.01 solution, 20 mL sachet (25 pcs)
HI 7004M pH 4.01 solution, 230 mL bottle
HI 70007P pH 7.01 solution, 20 mL sachet (25 pcs)
HI 7007M pH 7.01 solution, 230 mL bottle
HI 70010P pH 10.01 solution, 20 mL sachet (25 pcs)
HI 7010M pH 10.01 solution, 230 mL bottle
HI 70032P 1382 ppm solution, 20 mL sachet (25 pcs)
HI 7032M 1382 ppm solution, 230 mL bottle
HI 70442P 1500 ppm solution, 20 mL sachet (25 pcs)
HI 70442M 1500 ppm solution, 230 mL bottle
HI 70300M Storage solution, 230 mL bottle
HI 700661P Cleaning solution, 20 mL sachet (25 pcs)
HI 7061M Cleaning solution, 230 mL bottle
HI 710005 115 Vac / 12 Vdc power adapter
HI 710006 230 Vac / 12 Vdc power adapter
HI 731326 Calibration screwdriver (20 pcs)
* To be replaced by authorized technical personnel only
CE DECLARATION OF CONFORMITY
Pour small quantities of pH 7 (HI 7007) and pH 4 (HI 7004)
or pH 10 (HI 7010) buffer solutions into two clean beakers.
For accurate calibration use two beakers for each buffer solution, the first one for rinsing the electrode tip, and the second
one for calibration.
• Turn the meter on.
• Remove the electrode protective cap, rinse and immerse the
electrode in the pH 7 buffer solution together with the TDS
probe (working as matching pin). Stir gently and wait for
the reading to stabilize.
Note: The electrode should be submerged approximately 4 cm
(1½”) in the solution.
• Adjust the “pH 7” trimmer with the supplied calibration
screwdriver until the LCD shows pH “7.0”.
• Rinse and immerse the pH electrode and the TDS probe in
the pH 4 (or pH 10) buffer. Stir gently.
• Wait for a stable reading and then adjust the “pH 4”
trimmer to read pH “4.0” (or pH “10.0”).
The pH calibration is now complete.
• Turn the meter on by connecting the supplied 12 Vdc
power adapter to the meter and then to the mains.
• Remove the protective cap
from the pH electrode.
• Immerse the tips of pH electrode (at least 4cm/1½”),
TDS and temperature probes
into the solution to be tested.
For best accuracy, the probes
should not touch or stand
close to the vessel’s walls or
bottom.
• The three backlit LCDs will show
the pH, TDS and temperature values, respectively.
Any initial variation in readings may be due to the pH
electrode conditioning and to the temperature compensation of TDS measurements. Allow the readings to stabilize.
It is recommended to clean the probe at least once a month,
by following this procedure:
• Immerse the tip of the probe in the HI 700661 cleaning
solution supplied with the instrument, for half an hour.
• If a more thorough cleaning is required, brush the metal
pins with very fine sandpaper.
• After cleaning, rinse the probe with tap water and recalibrate
the instrument.
ISTCOMBO3-R1 05/05
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