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
ORP ORP
ORP is in compliance with the CE directives.
ORP ORP
ORP
HI 98201
Pocket-sized Redox Meter
SPECIFICATIONS:
RANGE -999 to +999 mV
RESOLUTION 1 mV
ACCURACY
TYPICAL EMC DEVIATION ±5 mV
ENVIRONMENT
BATTERY TYPE 4 x 1.5V alkaline (included)
BATTERY LIFE approx. 700 hours
DIMENSIONS 175 x 41 x 23 mm
WEIGHT 78 g (2.7 oz.)
(@20°C/68°F) ±5 mV
0 to 50C (32 to 122F); 95% RH
of continuous use
(7.9 x 1.8 x 1")
ELECTRODE REPLACEMENT:
The electrode can be easily replaced in the following
way:
• Slide off the battery cover.
• Remove the screw on the back of the
below the battery compartment and slide off the
whole internal part of the tester.
ORPORP
ORP located
ORPORP
Internal circuit and electrode:
ACCESSORIES:
HI 7020M ORP 200/275 mV solution
(230 mL bottle)
HI 7091M Reducing solution (230 mL bottle)
HI 7092M Oxidizing solution (230 mL bottle)
HI 70300M Storage solution (230mL)
HI 7061M Electrode cleaning solution
(230mL bottle)
HI 73201 Spare electrode
Visit our Internet Home Page:
http://www.hannainst.com
• To remove the electrode proceed as follows:
Remove the fastening screw on the front (1) to
loose the electrode. The internal circuit is connected to the electrode through two wires (one
for the glass sensor and one for the reference).
Remove the two small screws (2 & 3) which
fasten the four connecting wires to their sockets.
• Remove the electrode and
replace it with a new
HI73201.
• Connect the new electrode
as follows:
first fasten the screw on the
front (1) to attach the electrode to the circuit. Insert
the two small wires into
their sockets and fasten the
two screws (2 & 3).
HI73201
• The new electrode is supplied
with four new O-rings (4).
Make sure they are placed
properly (as shown on the
above drawing) before reinserting the circuit into the
plastic casing.
• Reinsert the internal circuit
with the new electrode into
the plastic casing.
• Fasten the screw on the
back below the battery compartment.
• Reinsert the battery compartment cover.
• Recondition the ORP before using it
again.
IS98201R3 05/01
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