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Instruction Manual

HI 208   HI 207

Educational pH / Temperature

Bench Meters

with Built-in Stirrer

Dear Customer,
Thank you for choosing a Hanna Instruments
Product.
Please read this instruction manual carefully
before using the instrument. If you need addi-
tional technical information, do not hesitate to
e-mail us at 

[email protected]

.

These instruments are in compliance with
the 

 directives.

All Hanna Instruments

 meters are warranted

for two years 

against defects in workmanship

and materials when used for their intended pur-
pose and maintained according to instructions. 

The

probe is warranted for a period of six months.

This warranty is limited to repair or replacement
free of charge

Damage 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 problem. If the repair
is not covered by the warranty, you will be noti-
fied 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.

WARRANTY

PRELIMINARY EXAMINATION

Remove the instrument from the packing
material and examine it carefully to make
sure that no damage has occurred during
shipment. If noticeable damage is evident,
notify your dealer.

Each instrument is supplied with:

HI 1291D

 pH/Temperature probe with DIN

connector and 0.5 m (1.6’) cable

pH 4.01 & 7.01

 buffer solutions (20 mL each)

• Plastic beaker
• Electrode holder
• Rubber O-ring

Magnetic stir bar (

HI 208

 only)

12Vdc power adapter

Instruction manual

Note:

Save all packing material until you
are sure that the instrument functions
correctly. All defective items must be
returned in the original packing to-
gether with the supplied accessories.

HI 207

 and 

HI 208 

are microprocessor-based

pH and temperature bench meters.
Main features include: extended pH and tem-
perature ranges; built-in magnetic stirrer (

HI 208

only); large dual-line display; automatic pH cali-
bration at one or two points, with two memo-
rized buffer sets (standard or NIST); selectable
temperature unit (°C or °F).
The pH electrode has a built-in temperature
sensor for simultaneous pH and temperature
readings, and also contains a mini amplifier to
render measurements impervious to noise and
electrical interferences.

GENERAL DESCRIPTION

SPECIFICATIONS

Range (*)

-2.00 to 16.00 pH

-5.0 to 105.0 °C / 23.0 to 221.0 °F

Resolution

0.01 pH

0.1 °C / 0.1 °F

Accuracy

±0.02 pH

(@20°C/68°F)

±0.5 °C up to 60 °C; ±1 °C outside

±1 °F up to 140 °F; ±2 °F outside

Typical EMC

±0.02 pH

Deviation

±0.2 °C or ±0.4 °F

Temperature

Automatic

Compensation

pH Calibration

Automatic, 1 or 2 point

with 2 sets of standardized buffers

(pH 4.01/7.01/10.01 or 4.01/6.86/9.18)

Probe

 (included)

HI 1291D

amplified pH/Temperature probe

with DIN connector and 0.5 m (1.6’) cable

Stirrer (HI 208 only)

Built-in magnetic stirrer

at 500 rpm

Power supply

12 Vdc adapter

or 9V alkaline battery

Battery life

Approx. 200 hours

without stirrer

Environment

0 to 50 °C (32 to 122 °F);

max RH 95%

Dimensions

192 x 104 x 134 mm (7.6 x 4.1 x 5.3”)

Weight

420 g (14.8 oz.)

(*)

 

The temperature range is limited to 80 °C (176 °F)

if using the 

HI 1291D

 probe.

Hanna Instruments reserves the right to modify

the design, construction and appearance of its

products without advance notice.

LCD DESCRIPTION

1

2

1

3

9
8
7

6

4
5

    

IST208  05/05

w w w.hannainst.com

FUNCTIONAL DESCRIPTION

STIR

ON/OFF

HOLD

SET

ON/OFF

MODE

HI 208

pH meter

1

2 3

5

6

4

7

9

10

11

8

Front Panel

1- Liquid Crystal Display (LCD).
2- ON/OFF/MODE key, to turn the instrument

ON or OFF, to quit calibration/freezing
mode or to set parameters in SETUP.

3- HOLD/SET key, to freeze the display, to select

the temperature unit or the calibration buffer
set, or to reset to the default calibration.

4- Stirrer status LED indicator (

HI 208

 only).

5- STIR ON/OFF key (

HI 208

 only), to start/

stop the stirrer.

6- Electrode holder.

Rear Panel

7- Plastic beaker.
8- Beaker holder.
9- Magnetic stir bar (

HI 208

 only).

10 - DIN connector for probe.
11 - Socket for power adapter.

1. Automatic Temperature Compensation

indicator

2. Stability indicator
3. Battery percentage
4. pH calibration indicator
5. Battery indicator
6. Selectable temperature unit
7. Secondary display
8. Primary display
9. pH measurement unit

www.tools.in.th 

www.neonics.co.th

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