Hanna Instruments HI 981401 User Manual
Instruction Manual
(HI 981401N)
On-line, waterproof
pH meter with large LCD
This Instrument is in
http://www.hannainst.com
WARRANTYWARRANTY
WARRANTY
WARRANTYWARRANTY
Compliance with the CE Directives
Dear Customer,
Thank you for choosing a Hanna product. This manual will
provide you with the necessary information 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 tech@hannainst.com.
This instrument is in compliance with the directives.
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
PRELIMINARY EXAMINATIONPRELIMINARY 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.
The meter is supplied with:
HI 1286 pH electrode;
HI 1283 grounding probe;
Calibration screwdriver;
pH 4.01 and 7.01 buffer solutions (20 mL each);
12 VDC power adapter.
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 DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
Range 0.0 to 14.0 pH
Resolution 0.1 pH
Accuracy (@ 25°C/77°F) ±0.2 pH
Typical EMC Deviation ±0.1 pH
Calibration Manual with two trimmers
for offset and slope
Probes HI 1286 interchangeable pH electrode
and HI 1283 grounding probe (included)
Casing IP54
Power supply External 12 VDC (included)
Dimensions 86 x 94 x 33 mm (3.4 x 3.7 x 1.3)
Weight 150 g (5.3 oz)
OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDE
OPERATIONAL GUIDEOPERATIONAL GUIDE
pH ELECTRODE CONNECTION & MAINTENANCE
In order to protect pH against
vapors and humidity, the BNC connector is
shielded behind a waterproof sheath.
pH is warranted for one year against defects in
workmanship 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.
To validate your warranty, fill out and return the enclosed warranty card
within 14 days from the date of purchase.
All rights are reserved. Reproduction in whole or in part is prohibited
without the written consent of the copyright owner, Hanna Instruments Inc., Woonsocket, Rhode Island, 02895 , USA.
Hanna Instruments reserves the right to modify the design, construction
and appearance of its products without advance notice.
pH is a pH meter specially designed to meet
the needs of growers in greenhouses and hydroponic applications. It is equipped with a large LC display which make
easy to read measurements from distance at any time.
The housing has been completely sealed against vapors and
humidity. The HI 1286 gel-filled pH electrode is interchangeable and the BNC connector is protected behind a
waterproof sheath.
The meter is also supplied with HI 1283 stainless steel probe
to prevent potential grounding problems and thus ensuring
longer life for your electrode, which has been designed for
use in fertilizer solutions with high concentration of phosphate and nitrate.
You can simply hang the meter right above the sample to
be tested for continuous measurement, and it will run
without interruption on 12 VDC power supply.
Measurements are highly accurate and the meter can be
calibrated at one or two points.
1. Molded eye
2. pH 4.0 calibration trimmer
3. BNC connector
4. HI 1283 stainless steel grounding probe
5. HI 1286 pH electrode
6. 12 VDC power adapter
7. Power supply connector
8. Protective sheath
9. pH 7.0 calibration trimmer
10. Liquid Crystal Display (LCD)
Slide the protective sheath down. Connect the HI 1286
pH electrode to the BNC connector and then slide the
protective sheath back up all the way up to the pH
casing. Since the protective sheath is rubberized and 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.
When not in use, rinse the electrode with water to
minimize contamination and store it with a few drops of
storage (HI 70300) or pH7 (HI7007) 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 pH7 (HI7007) solution for at
least one hour to reactivate it.
CALIBRATIONCALIBRATION
CALIBRATION
CALIBRATIONCALIBRATION
For the greatest accuracy, frequent calibration of the instrument is recommended. In addition, the instrument must be
recalibrated whenever:
a) The pH electrode is replaced.
b) After testing aggressive chemicals.
c) Extreme accuracy is required.
d) At least once a month.
Note: the electrode should be sub-
merged approximately 4cm
(1½) in the solution.
Adjust the right hand trimmer
with the calibration screwdriver
until the LCD shows 7.0.
(1½")
4 cm
CE DECLARATIONCE DECLARATION
CE DECLARATION
CE DECLARATIONCE DECLARATION
OF CONFORMITYOF CONFORMITY
OF CONFORMITY
OF CONFORMITYOF CONFORMITY
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 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.
In addition to the pH electrode, the
pH is supplied with a
differential input and HI1283 stainless steel probe to prevent potential
grounding problems. Remove the protective cap from the pH electrode and
immerse the tips (4cm/1½) of both
pH electrode and grounding probe in
the sample.
The LCD will show the pH value. Allow the reading to stabilize
and pH will start continuous monitoring.
Note: to prolong the electrode life, after switching the meter
off, remove the electrode from the solution or, alternatively, detach it from the meter.
PREPARATION
Pour small quantities of pH 7.01 (HI7007) and pH 4.01
(HI7004) solution into two clean beakers.
HI 7004
HI 7004 HI 7007HI 7004 HI 7007
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.
RINSE
HI 7007
CALIBRATION
HI 7007
This way, contamination of the buffers is minimized.
pH4.01 (HI7004) is recommended for measuring acidic
samples. Use pH 10.01 (HI7010) if subsequent samples
are alkaline.
CALIBRATION PROCEDURE
Remove the protective cap from the
electrode, rinse and immerse it in a
pH 7.01 buffer with the grounding
probe. Stir gently and then wait a
couple of minutes for the reading to
stabilize.
Rinse and immerse the pH electrode
and the grounding probe in pH4.01
(or pH10.01) buffer and stir gently.
Wait a couple of minutes and
then adjust the left hand trimmer until the LCD shows the
value of the second buffer.
The pH calibration is now complete.
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 unacceptable 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 instruments
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.
ACCESSORIESACCESSORIES
ACCESSORIES
ACCESSORIESACCESSORIES
HI 1283 * Stainless steel grounding probe with 2 m
(6.6) cable
HI 1286 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 7004L pH 4.01 solution, 460 mL bottle
HI 7007L pH 7.01 solution, 460 mL bottle
HI 7061L Electrode cleaning solution, 460 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
HI 77400P pH 4 & 7 solutions, 20 mL sachet (5 each)
* To be replaced only by authorized service technicians
IST981401NR1
09/00
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