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Hanna Instruments reserves the right to modify the design, con-
struction and appearance of its products without advance notice.
WARRANTY
HI 98127 and HI 98128 are warranted for one
year against defects in workmanship and materials
when used for their intended purpose and maintained
according to instructions. The electrode is war-
ranted 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 re-
turned 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., Woonsocket,
Rhode Island, 02895 , USA.
Instruction Manual
HI 98127 - HI 98128
Waterproof
pH & Temperature Meters
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 73127 pH electrode
• HI 73128 Electrode removal tool
• 4 x 1.5V batteries
Note: Conserve all packing material until the instru-
ment has been observed to function correctly.
Any defective item must be returned in its
original packing.
PRELIMINARY EXAMINATION
HI 98127 and HI 98128 are waterproof pH and
temperature meters. The housing has been completely
sealed against humidity and designed to float.
All pH readings are automatically temperature com-
pensated (ATC), and temperature values can be displayed
in °C or °F units.
The meters can be calibrated at one or two points with
auto-buffer recognition and against five memorized
buffer values.
Measurements are highly accurate with a unique sta-
bility indicator right on the LCD.
These meters are also provided with battery level
indication at start-up, and with a low battery symbol
which warns the user when the batteries need to be
replaced. In addition the Battery Error Prevention
System (BEPS) avoids erroneous reading caused by low
voltage level by turning the meter off.
The HI 73127 pH electrode, supplied with the meters,
is interchangeable and can be easily replaced.
The stainless steel encapsulated temperature sensor fa-
cilitates faster and more accurate temperature
measurement and compensation.
GENERAL DESCRIPTION
FUNCTIONAL DESCRIPTION
1. Battery compartment
2. Liquid Crystal Display (LCD)
3. ON/OFF/MODE button
4. HI 73127 pH electrode
5. Temperature sensor
6. SET/HOLD button
These Instruments are
in Compliance with
CE Directives
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.
The glass bulb at the end of the electrode is sensitive
to electrostatic discharges. Avoid touching the glass
bulb at all times.
Any variation introduced by the user to the supplied
equipment may degrade the instrument’s EMC per-
formance.
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 73127 Replaceable pH electrode
HI 73128 Electrode removal tool
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 7061M Electrode cleaning solution, 230 mL bottle
HI 70300M Electrode storage solution, 230 mL bottle
1. Automatic temperature compensation
indicator
2. Stability indicator
3. Battery life percentage indicator
4. Low battery indicator
5. Secondary display
6. Primary display
7. Measuring unit for primary display
ISTR98127R4 03/03
US DESIGN PATENT
D462,024
Dear Customer,
Thank you for choosing a Hanna product. This
manual will provide you with the necessary informa-
tion for 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.
These instruments are in compliance with the
directives.