Hanna Instruments HI 98101 User Manual

pHel

pH electrodepH electrode

pH electrode pHel

pH electrodepH electrode

pH electrode pHel

pH electrodepH electrode

pH electrode pHel

pH electrodepH electrode

pH electrode

pH electrodepH electrode

Specifications

Range Resolution Accuracy

(@20°C/°68F) Typical EMC

Deviation Calibration

Environment Battery

Life Dimensions Weight

Operating Instructions

pHel is a very easy instrument to use. Simply switch it on, remove the protective cap and immerse the tip of the electrode (the bottom 4cm

0.0 to 14.0 pH

0.1 pH

±0.2 pH ±0.2 pH

Two points

through trimmers

0 to 50ºC (32 to

122ºF), 95% RH

2 x 1.4V

3000 hours of

continuous use 200x28x20 mm

7.9x1.1x0.8"

46 g (1.6 oz.)

or 1½ inch) into the solution. Under no circumstances the immersion shall be above 8 cm or 3 inches. Stir gently and wait until the display stabilizes. If the electrode is dry, allow a few minutes for the reading to stabilize. For best results, recalibrate periodically using fresh calibration buffers.

• Do not be alarmed if white crystals appear around the cap. This is normal with pH electrodes and they dissolve when rinsed with water.

• If the electrode is dry, soak it in tap water for a few minutes.

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

• Store the electrode with a few drops of

Storage Solution

in the protective cap.

DO NOT USE DISTILLED OR

Always replace the protective cap after use.

Calibration

• Dip the tip of the electrode (4cm/1½") of pHel in a sample of pH 7.01 buffer (from

Calibration Kit

the reading to stabilize.

HI70300

DEIONIZED WATER FOR

STORAGE PURPOSES.

HI774P

). Allow

• Adjust the pH 7 trimmer until the display reads "7.0".

pHel

pH electrodepH electrode

pH electrode pHel

pH electrodepH electrode

pH electrode pHel

pH electrodepH electrode

pH electrode pHel

pH electrodepH electrode

pH electrode

pH electrodepH electrode

• Rinse the electrode with water and dip it in a sample of pH 4.01 (or

10.01 buffer from

HI 7710P Calibration Kit

). Allow the reading

to stabilize.

• Adjust the pH 4/10 trimmer until the display reads the chosen buffer value (either "4.0" or "10.0").

• Calibration is now complete. FOR BETTER ACCURACY,

ALWAYS USE FRESH

BUFFERS FOR CALIBRATION

& NEVER REUSE THEM.

Battery Replacement

Replace the batteries when the display fades or pHel cannot be switched on or segments are missing.

Lift the battery cover. Check the polarity of the batteries before removing them. Insert two new 1.4V batteries the same way. Battery replacement must only take place in a non hazardous area using the battery types specified in this instruction manual.

Maintenance

• If the electrode remains dry for a long period, before taking any measurement or calibrating, it is necessary to reactivate it by dipping it into tion for approximately 4 hours. The electrode should be cleaned after use and stored with the cap on and some

HI70300

solution inside.

solu-

• Solutions available for the calibration, the maintenance, the storage and the cleaning of the electrode:

•

HI70300

•

HI7061

solution (soak for 30 min.)

•

HI7073

solution (soak for 15 min.)

•

HI7074

solution (soak for 15 min.)

•

HI7077

ing solution (soak several times with clean solution)

•

HI774P

4.01 & 7.01 @ 25°C/77°F, 30 ml each)

•

HI777P

7.01 @ 25°C/77°F, 2 x 30 ml)

•

HI7710P

4.01 & 10.01 @ 25°C/77°F, 30 ml each)

Storage solution

General cleaning

Protein cleaning

Inorganic cleaning

Oil and fat clean-

Calibration kit (pH

Recommendations for Users

Before using this product, ensure that it is entirely suitable for the environment in which it is used. Operation of this instrument in residential area could cause unacceptable interferences to radio and TV equipments, requiring the operator to take all necessary steps to correct interferences. The glass bulb at the end of the electrode is sensitive to electrostatic discharges. Avoid touching this glass bulb at all times. During operation, ESD wrist straps should be worn to avoid possible damage to the electrode by electrostatic discharges. Any variation introduced by the user to the supplied equipment may degrade the instrument's EMC performance. To avoid electrical shock, do not use these instruments when voltages at the measurement surface exceed 24VAC or 60VDC. To avoid damages or burns, do not perform any measurement in microwave ovens.

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SPHEL 09/96