Instruction Manual
HI 207 • HI 208
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 these
instruments. This manual will provide you with the necessary
information for correct use of these instruments, as well as a
precise idea of their versatility. If you need additional technical
information, do not hesitate to e-mail us at tech@hannainst.com
or view our worldwide contact list at www.hannainst.com.
HI 207 and HI 208 are guaranteed for two years against defects
in workmanship and materials when used for their intended
purpose 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 is 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 notified of the charges incurred. If the instrument is to be
returned to Hanna Instruments, first obtain a Returned Goods
Authorization Number from the Technical Service department
and then send it with shipping costs prepaid. When shipping
any instrument, make sure it is properly packed 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.
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 together with the
supplied accessories.
HI 207 and HI 208
are microprocessor-based pH and temperature
bench meters.
Main features include: extended pH and temperature ranges;
built-in magnetic stirrer (HI 208 only); large dual-line display;
automatic pH calibration at one or two points, with two
memorized 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.
LCD DESCRIPTION
www.hannainst.com
FUNCTIONAL DESCRIPTION
STIR
ON/OFF
HOLD
SET
ON/OFF
MODE
HI208
pHmeter
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
Hanna Instruments reserves the right to modify the design, construction or
appearance of its products without advance notice.
IST208 02/13
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