Hanna Instruments HI 981402 User manual

Instruction Manual
(HI 981402)
On-line, Waterproof
pH meter with Alarm
www.hannainst.com
Hanna Instruments reserves the right to modify the design, construction
and appearance of its products without advance notice.
WARRANTY
HI 981402 is warranted 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
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.
Dear Customer,
Thank you for choosing a Hanna product.
This manual will provide you with the necessary information
for correct operation of the meter. Please read it carefully
before using the meter.
If you need additional technical information, do not hesitate
to e-mail us at [email protected].
This instrument is in compliance with the directives.
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.
The meter is supplied with:
•HI 1286 pH electrode
• Calibration screwdriver
• 12 Vdc power adapter and 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.
PRELIMINARY EXAMINATION
HI 981402 is a pH meter specially designed to meet the
needs of simple continuous monitoring of pH.
The housing has been completely sealed against vapors and
humidity with IP54 rating.
Simply hang the meter right above the sample to be tested
for continuous measurement.
The HI 1286 gel-filled pH electrode is interchangeable and
the BNC connector is protected behind a waterproof sheath.
The unique design of the electrode provides longer life even
in aggressive solutions.
This instruemnt also provides for a selectable setpoint and
alerts the user with a flashing LED alarm when an abnor-
mal situation occurs.
Measurements are highly accurate and the meter can be
calibrated at one or two points.
You no longer need to worry about battery changes either:
the unit runs without interruption on 12 Vdc power supply.
GENERAL DESCRIPTION
FUNCTIONAL DESCRIPTION
1. Molded eye
2. Alarm LED
3. “pH 4” calibration trimmer
4. BNC connector
5. HI 1286 pH electrode
6. 12 VDC power adapter
7. Power supply connector
8. Protective sheath
9. “pH 7” calibration trimmer
10. Liquid Crystal Display
pH ELECTRODE CONNECTION & MAINTENANCE
In order to protect the instrument against
vapors and humidity, 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. Since the protective sheath is
rubberized 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 elec-
trodes and they dissolve when rinsed with water.
SPECIFICATIONS
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, through offset and slope trimmers
pH Electrode HI 1286 (included)
Setpoint 3.0 to 11.0 pH
Hysteresis ±0.5 pH around setpoint
Alarm LED blinks when pH is outside hysteresis range
Casing IP54
Power supply 12 Vdc adapter (included)
Dimensions 86 x 110 x 43 mm (3.4 x 4.3 x 1.7’’)
Weight 150 g (5.3 oz.)
OPERATIONAL GUIDE

• When not in use, rinse the electrode with water and store
it with a few drops of storage (HI 70300) or pH 7
(HI 7007) 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 a
storage (HI 70300) or pH 7 (HI 7007) solution for at
least one hour to reactivate it.
• To minimize clogging and provide longer life for the pH
electrode, it is recommended to clean it monthly. Im-
merse the tip of the electrode in HI 7061 for one hour
and then rinse it with tap water.
TAKING pH MEASUREMENTS
• Turn the meter on by connecting
the 12 Vdc power adapter to the
meter and to the mains.
• Remove the protective cap from the
pH electrode and immerse the pH
electrode tip (4 cm/1½”) into the
sample.
• The LCD will show the pH value. Allow
the reading to stabilize and the instru-
ment will start continuous monitoring.
Note: To prevent damages to the pH
electrode, remove it from the sample
before turning the meter off.
ADJUSTING THE SETPOINT
With HI 981402 you can select the desired setpoint and be
alerted with a visual LED alarm when an abnormal situa-
tion arises.
• To access the MEASURE/SET switch and the setpoint
adjustment trimmer, remove the rear panel.
• Move the switch to the left (SET position).
• With a small screwdriver adjust the setpoint trimmer to
display the desired value in the range from 3 to 11 pH.
For the greatest accuracy, frequent calibration of the instru-
ment is recommended. In addition, the instrument must be
recalibrated whenever:
a) The pH electrode is replaced
b) After testing aggressive chemicals
c) Where extreme accuracy is required
d) At least once a month
PREPARATION
Pour small quantities of pH 7.0 (HI 7007) and pH 4.0
(HI 7004) solution into two clean beakers.
For accurate calibration use two beakers for each buffer
solution, the first one for rinsing the tip of the electrode and
the second one for calibration.
For the second calibration point, the pH 4.0 (HI 7004)
buffer is recommended if you are going to measure acidic
samples, while pH 10.0 (HI 7010) should be used if
samples to be tested are alkaline.
CALIBRATION
•Moved back the switch to the MEASURE position.
• Close the meter with the rear panel, while making sure
the gasket is in place before tightening the screws.
• Whenever the pH reading varies
more than ±0.5 pH from the
setpoint, the red alarm LED blinks
to warn the user.
CALIBRATION PROCEDURE
• Turn the meter on and make sure that the MEASURE/SET
switch is on the MEASURE position.
• Remove the protective cap from the
electrode, rinse and immerse it in
pH 7.0 buffer solution. Stir gently
and wait a couple of minutes for the
reading to stabilize.
Note: The electrode should be submerged
approximately 4 cm (1½”) in the
solution.
• With the calibration screwdriver,
adjust the “pH 7” trimmer
until the LCD shows “pH 7.0”.
•Rinse and immerse the pH electrode in pH 4.0 (or
pH 10.0) buffer and stir gently.
• Wait a couple of minutes, then
adjust the “pH 4” trimmer
until the LCD shows “pH 4.0”
(or “pH 10.0”).
The calibration is now complete.
4 cm
(1½")
CE DECLARATION OF CONFORMITY
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 unaccept-
able 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 equipment 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.
ACCESSORIES
HI 1286 Double junction, plastic body pH electrode
with 2 m (6.6’) cable and BNC connector
HI 2114P/2 Double junction, plastic body pH electrode
with 2 m (6.6’) cable and BNC connector
HI 70004P pH 4.01 solution, 20 mL sachet (25 pcs)
HI 70007P pH 7.01 solution, 20 mL sachet (25 pcs)
HI 70010P pH 10.01 solution, 20 mL sachet (25 pcs)
HI 7004L pH 4.01 solution, 500 mL bottle
HI 7007L pH 7.01 solution, 500 mL bottle
HI 7010L pH 10.01 solution, 500 mL bottle
HI 70300L Electrode storage solution, 500 mL bottle
HI 7061L Electrode cleaning solution, 500 mL bottle
HI 710005 12 Vdc power adapter, US plug
HI 710006 12 Vdc power adapter, European plug
HI 710012 12 Vdc power adapter, Australian plug
HI 710013 12 Vdc power adapter, Southern Africa plug
HI 710014 12 Vdc power adapter, UK plug
IST981402 05/05
HI 7007
RINSE
HI 7007
CALIBRATION