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 tech@hannainst.com.
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 64
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
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