User Guide

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 When not in use, rinse the electrode with water to

minimize contamination and store it with a few drops of

storage (HI 70300) or pH7 (HI7007) solution in the

protective cap. Always replace the protective cap after use.

DO NOT USE DISTILLED OR DEIONIZED WATER FOR

STORAGE PURPOSES.

 If the electrode has been left dry, soak the tip in a

storage (HI 70300) or pH7 (HI7007) solution for at

least one hour to reactivate it.

 To minimize clogging and provide longer life for the pH

electrode, it is recommended to clean it monthly. Im-

merse the tip of the electrode in HI 7061 for one hour

and then rinse it with tap water.

TAKING pH MEASUREMENTS

 Turn the meter on by connecting the

12 VDC power adapter to the meter

and to the mains.

 In addition to the pH electrode, the

pH is supplied with a

differential input and HI1283 stain-

less steel probe to prevent potential

grounding problems. Remove the pro-

tective cap from the pH electrode and

immerse the tips (4cm/1½) of both

pH electrode and grounding probe in

the sample.

 The LCD will show the pH value. Allow the reading to stabilize

and pH will start continuous monitoring.

Note: to prolong the electrode life, after switching the meter

off, remove the electrode from the solution or, alterna-

tively, detach it from the meter.

For the greatest accuracy, frequent calibration of the instru-

ment is recommended. In addition, the instrument must be

recalibrated whenever:

a) The pH electrode is replaced.

b) After testing aggressive chemicals.

c) Extreme accuracy is required.

d) At least once a month.

PREPARATION

Pour small quantities of pH 7.01 (HI7007) and pH 4.01

(HI7004) solution into two clean beakers.

For accurate calibration use two beakers for each buffer

solution, the first one for rinsing the tip of the electrode and

the second one for calibration.

This way, contamination of the buffers is minimized.

pH4.01 (HI7004) is recommended for measuring acidic

samples. Use pH 10.01 (HI7010) if subsequent samples

are alkaline.

CALIBRATION PROCEDURE

 Remove the protective cap from the

electrode, rinse and immerse it in a

pH 7.01 buffer with the grounding

probe. Stir gently and then wait a

couple of minutes for the reading to

stabilize.

CALIBRATIONCALIBRATION

CALIBRATION

HI 7004 HI 7007HI 7004 HI 7007

HI 7004

HI 7007

RINSE

HI 7007

CALIBRATION

Note: the electrode should be sub-

merged approximately 4cm

(1½) in the solution.

 Adjust the right hand trimmer

with the calibration screwdriver

until the LCD shows 7.0.

 Rinse and immerse the pH electrode

and the grounding probe in pH4.01

(or pH10.01) buffer and stir gently.

 Wait a couple of minutes and

then adjust the left hand trim-

mer until the LCD shows the

value of the second buffer.

The pH calibration is now complete.

4 cm

(1½")

CE DECLARATIONCE DECLARATION

CE DECLARATION

OF CONFORMITYOF CONFORMITY

OF CONFORMITY

Recommendations for Users

Before using this product, make sure that it is entirely suitable for the environment in

which it is used. Operation of this instrument in residential areas could cause unaccept-

able interferences to radio and TV equipment.

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 this instrument when voltages at the measurement surface

exceed 24 VAC or 60 VDC. To avoid damages or burns, do not perform any measurement in

microwave ovens.

ACCESSORIESACCESSORIES

ACCESSORIES

HI 1283 * Stainless steel grounding probe with 2 m

(6.6) cable

HI 1286 Double junction, plastic body pH electrode

with 2 m (6.6) cable and BNC connector

HI 70004P pH 4.01 solution, 20 mL sachet (25 pcs)

HI 70007P pH 7.01 solution, 20 mL sachet (25 pcs)

HI 7004L pH 4.01 solution, 460 mL bottle

HI 7007L pH 7.01 solution, 460 mL bottle

HI 7061L Electrode cleaning solution, 460 mL bottle

HI 710005 12 VDC power adapter, US plug

HI 710006 12 VDC power adapter, European plug

HI 710012 12 VDC power adapter, Australian plug

HI 710013 12 VDC power adapter, Southern Africa plug

HI 710014 12 VDC power adapter, UK plug

HI 77400P pH 4 & 7 solutions, 20 mL sachet (5 each)

* To be replaced only by authorized service technicians

IST981401NR1

09/00