Hanna Instruments PHep 98107 Manual de usuario

pHep is a rugged pH tester with replaceable

electrode and renewable reference junction. The

instrument can be calibrated at two points by

the user, simply acting on the offset and slope

calibration trimmers.

CONDITIONING:

• Remove the cap.

• To activate the electrode, immerse it in

HI70300 storage solution for 2 hours.

CALIBRATION:

Perform one of the following two-point calibration

procedure, according to the required application:

Acid calibration for measurements below pH 7:

• Immerse the electrode in pH

7.01 (HI7007) buffer solution.

• Allow the reading to stabilize

and with a small screwdriver

turn the pH7 Calibration Trim-

mer until the display shows

"7.0".

• Rinse the electrode with tap water and immerse

it in pH 4.01 (HI7004) buffer solution.

• Allow the reading to stabilize and with a small

screwdriver turn the pH4/pH10 Calibration Trim-

mer until the display shows "4.0".

Alkaline calibration for measurements above pH 7:

• Immerse the electrode in pH 7.01 (HI7007)

buffer solution.

• Allow the reading to stabilize and with a small

screwdriver turn the pH7 Calibration Trimmer

until the display shows "7.0".

• Rinse the electrode with tap water

and immerse it in pH 10.01 (HI7010) buffer

solution.

• Allow the reading to stabilize and with a small

screwdriver turn the pH4/pH10 Calibration Trim-

mer until the display shows "10.0".

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 immer-

sion level.

HI 70300

• Stir gently and wait for the reading to stabilize.

• After use, rinse the electrode with tap water to

minimize contamination.

• Store the electrode with a few

drops of storage (HI70300) or

pH7 (HI7007) solution in the pro-

tective cap.

• Always replace the protective cap after use.

DO NOT USE DISTILLED OR DEIONIZED WATER

FOR STORAGE PURPOSES.

• Large differences in pH readings (±1 pH) could

be due to lack of calibration or dry electrode.

MAINTENANCE:

The sensor should be kept moist at all times. For this

purpose, always keep wet the tissue inside the

protective cap. 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 rec-

ommended to cut the cloth

leaving always at least 2

mm -1/8'' over the reference

compartment) and repeat the

calibration procedure.

The cloth junction can be pulled out approximately

20 times. After that, the electrode can be replaced

(see the Electrode Replacement section).

BATTERY REPLACEMENT:

If calibration can not be performed or the display

fades, batteries level is low and batteries must be

replaced. Slide off the battery compartment cover

and replace all four 1.5V batteries while paying

attention to their polarity.

Batteries should only be replaced in a nonhazardous

area using the battery type specified in this instruction

manual.

pHep®®

®®

HI 98107

Pocket-sized pH Meter

Manufacturers since 1978

Visit our Internet Home Page:

http://www.hannainst.com

SPECIFICATIONS:

RANGE 0.0 to 14.0 pH

RESOLUTION 0.1 pH

ACCURACY (@20°C/68°F) ±0.1 pH

TYPICAL EMC DEVIATION ±0.1 pH

ENVIRONMENT 0 to 50C

(32 to 122F); 95% RH

CALIBRATIONCALIBRATION

CALIBRATION Manual, at two points through

offset and slope trimmers

BATTERY TYPE 4 x 1.5V alkaline (included)

BATTERY LIFE approx. 1700 hours

of continuous use

DIMENSIONS 175 x 41 x 23 mm

(7.9 x 1.8 x 1")

WEIGHT 78 g (2.7 oz.)

ACCESSORIES:

HI 73106 Spare electrode

HI 77400P pH 4.01 & 7.01 calibration kit

(5 x 20 mL, each)

HI 77700P pH 7.01 calibration kit

(10 x 20 mL)

HI 770710P pH 7.01 & 10.01 calibration kit

(5 x 20 mL, each)

HI 7004M pH 4.01 buffer solution

(230 mL bottle)

HI 7007M pH 7.01 buffer solution

(230 mL bottle)

HI 7010M pH 10.01 buffer solution

(230 mL bottle)

HI 70300M Storage solution (230mL)

HI 7061M Electrode cleaning solution

(230mL bottle)

HI 731326 Calibration screwdriver (20 pcs)

IS98107-R3 09/01

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 pHeppHep

pHeppHep

pHep

located below the battery compartment and slide

off the whole internal part of the tester.

• To remove the electrode proceed as follows:

Remove the fastening screw on the front (1) to

loose the electrode. The internal circuit is con-

nected 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 two connecting wires to their sock-

ets.

• Remove the electrode and

replace it with a new

HI73106.

• Connect the new electrode

as follows:

first fasten the screw on the

front (1) to attach the elec-

trode to the circuit. Insert

the two small wires into

their sockets and fasten the

two screws (2 & 3).

• 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.

Internal circuit and electrode:

• Reinsert the battery compartment cover.

• Perform a new calibration before using the

pHeppHep

pHep again.

pHep®®

®®

HI 98107

Pocket-sized pH Meter

HI73106

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

ONE YEAR WARRANTY & SERVICEABLE:

Covered by one yearone year

one yearone year

one year warranty against defects in work-

manship and materials, this tester is now completely

serviceable. Contact your dealer for further information.

The pHeppHep

pHeppHep

pHep is in compliance with the CE directives EN

50082-1, EN 50081-1 and EN 61010-1.

pHeppHep

pHep®®

®®

®is a registered Trademark of "Hanna Instruments"

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