Hanna Instruments HI 98201 User Manual

ORP

HI 98201

Pocket-sized Redox Meter

OPERATION:

• Remove the protective cap.

• Turn the meter on with the ON/OFF
switch located on the top of the
meter.

• Immerse it in the solution to be
tested without exceeding the maxi­mum immersion level.

• Stir gently and wait for the reading
to stabilize.

• After use, rinse the electrode with tap
water to minimize contamination.

• Always replace the protective cap after use.

MAINTENANCE:

dure.
The cloth junction can be
pulled out approximately
20 times. After that, the
electrode can be replaced
(see the Electrode Replace-

ment section).

BEPS & BATTERY REPLACEMENT:

The meter is supplied with BEPS (Battery Error
Preventing System) which avoid any erroneous read­ing due to low battery level. When the batteries are
too low, the meter automatically switches itself off.
To replace the batteries, slide off the battery com­partment cover and replace all four 1.5V batteries
while paying attention to their polarity.

Manufacturers since 1978

• Check the meter by immers­ing it in HI7020 ORP solu­tion. The reading should
be between 200 and 275
mV at 20ºC (68ºF).
Otherwise clean the plati­num tip of the electrode by
rubbing it with a soft cot­ton or lint-free cloth soaked
with HI7061 cleaning solu­tion.

• For more accurate readings, condition the meter
by immersing it in a pretreatment reducing
(HI7091) or oxidizing (HI7092) solution for half
an our before taking measurements.

• In case of erroneous readings even after an
accurate conditioning and calibration, the refer­ence junction might be contaminated or clogged.

• Pull out 2 mm (1/8'') of the cloth junction to
renew the electrode reference (it is recommended
to cut the cloth leaving always at least 2 mm ­1/8'' over the reference compartment) and re­peat the maintenance and conditioning proce-

Batteries should only be replaced in a nonhazardous
area using the battery type specified in this instruction

manual.

ONE YEAR WARRANTY & SERVICEABLE:ONE YEAR WARRANTY & SERVICEABLE:

ONE YEAR WARRANTY & SERVICEABLE:

ONE YEAR WARRANTY & SERVICEABLE:ONE YEAR WARRANTY & SERVICEABLE:

Covered by
manship and materials, this tester is now completely
serviceable. Contact your dealer for further information.

The

one yearone year

one year warranty against defects in work-

one yearone year

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ORP is in compliance with the CE directives.

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