Instruction Manual
(HI 981404N and HI 981405N)
pH & TDS/EC Monitors
w w w . h a n n a i n s t . c o m
Hanna Instruments reserves the right to modify the design, construction
and appearance of its products without advance notice.
WARRANTY
HI 981404N and HI 981405N are warranted for two years
against defects in workmanship and materials when used for their in-
tended purpose and maintained according to instructions.
The probes
are warranted for a period of six months.
This warranty is lim-
ited 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 pur-
chase, 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 de-
partment and then send it with shipment costs prepaid. When shipping
any instrument, make sure it is properly packaged for complete protec-
tion.
All rights are reserved. Reproduction in whole or in part is prohibited
without the written consent of the copyright owner, Hanna Instru-
ments.
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 hesi-
tate to e-mail us at
.
These instruments are 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.
Each meter is supplied complete with:
•
HI 1286
pH electrode
•
HI 1283
grounding probe
• Conductivity probe
HI 7634
for
HI 981404N
&
HI 7632
for
HI 981405N
• 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 981404N
(pH and TDS) and
HI 981405N
(pH and EC)
are specially designed to meet the needs of simple continuous
monitoring.
You can simply install the meter above the sample to be
tested for continuous measurement.
The
HI 1286
gel-filled pH electrode features a waterproof
sheath to protect BNC connector against humidity and
vapours. Moreover, the unique design of the electrode
provides longer life in aggressive solutions.
The meter is equipped with two large LCDs for easy-to-read
measurements even from a distance.
Measurements are accurate and the meters can be cali-
brated at one or two points for pH, and at a single point
for TDS and EC.
You no longer need to worry about battery changes because
these units run without interruption on 12 Vdc power
supply.
GENERAL DESCRIPTION
FUNCTIONAL DESCRIPTION
1. Liquid Crystal Displays
2. “pH 4” calibration trimmer
3. “pH 7” calibration trimmer
4. BNC connector
5. Protective sheath
6.
HI 1286
pH electrode
7.
HI 1283
grounding probe
8.
HI 7632
or
HI 7634
probe (depending on model)
9. 12 Vdc power adapter
10. Power supply connector
11. EC or TDS calibration trimmer
Common Specifications
Range
0.0 to 14.0 pH
Resolution
0.1 pH
Accuracy
(@ 25°C/77°F)
±0.2 pH
Calibration
Manual, 1 or 2 point
Probes
HI 1286
pH electrode (included) and
HI 1283
grounding probe (fixed)
Environment
0 to 50°C (32 to 122°F); RH max 95%
Power Supply
12 Vdc adapter (included)
Dimensions
160 x 110 x 35 mm (6.3 x 4.3 x 1.4”)
Weight
300 g (10.6 oz.)
HI 981404N only
Range
0 to 1990 mg/L (ppm)
Resolution
10 mg/L (ppm)
Accuracy
(@ 25°C/77°F)
±2% f.s.
TDS Factor
0.7 ppm = 1 µS/cm
Temperature
Automatic, 5 to 50°C (41 to 122°F)
Compensation
TDS only
Calibration
Manual, 1 point
TDS Probe
HI 7634
(fixed)
HI 981405N only
Range
0.00 to 9.99 mS/cm
Resolution
0.01 mS/cm
Accuracy (@ 25°C/77°F)
±2% f.s.
Temperature
Automatic, 5 to 50°C (41 to 122°F)
Compensation
EC only
Calibration
Manual, 1 point
EC Probe
HI 7632
(fixed)
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 unaccept-
able 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 instrument’s
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.
