Apera PH20 Manuel utilisateur

PH20 Value pH Tester

Instruction Manual

APERA INSTRUMENTS, LLC

www.aperainst.com

1. Battery Installation

Please install batteries according to the following steps. *Please note

direction of batteries: All POSITIVE SIDES (“+”) FACING UP.

(Wrong installation of batteries will cause damage to the tester

and potential hazards)

2. Keypad Functions

■Short press------- < 2 seconds

■Long press-------- > 2 seconds

1. Short press to turn on, long press to turn off;

2: When turned off, long press to enter setup;

3: In mode setting, short press to change

parameter;

1.When turned on, long press to enter calibration

mode.

2.In calibration mode, short press to confirm

calibration;

3.In mode setting, short press to confirm parameter

selection.

Diagram - 1

3. Complete Kit

4. Calibration

4.1 If first time use or unused for a long time, pour certain tap water in

probe cap, soak probe for about 5 minutes.

4.2 Short press to turn on. Rinse in pure water and dry it.

4.3 Long press to enter calibration mode; Short press to exit.

4.4 Soak probe in calibration solution 7.00 pH; Stir gently, leave it to stand,

LCD displays (as Diagram 3), short press , complete 1-point

calibration, tester returns to measurement mode, calibration icon

displays on button left side of LCD.

4.5 Rinse probe in pure water and dry it. Long press to enter calibration

mode, soak probe in calibration solution 4.00pH, stir gently, leave it to

stand, LCD display , short press , to complete 2 points calibration,

tester returns to measuring mode, calibration icon displays on bottom left

side of LCD ;

■Notes

a) Tester will automatically recognize pH buffer solution, user can choose

calibration points: 1point, 2points, or 3points. But 1st point calibration must

Diagram - 2

Diagram - 3

be in calibration solution of 7.00 pH, then followed by 2nd or 3rd point

calibration. For details, please refer to the following table:

Calibration Solution

Calibration

Indication icon

Recommended Accuracy

and Range

1-point

Calibration

7.00 pH

Accuracy ≥0.1pH

2-point

Calibration

7.00 pH and 4.00 pH

Measuring Range <7.0

7.00 pH and 10.01 pH

Measuring Range>7.0

3-point

Calibration

7.00 pH, 4.00 pH

and 10.01 pH

Wide measuring range

b) Automatic self-diagnostic information: if measured value is more than preset

range, LCD will display “Er1”; In calibration mode, if the measured value

hasn`t been stable, i.e. has not been displayed on LCD, pressing

will cause LCD to display “Er2”.

5. Measurement

5.1 Short press to turn on the tester. Rinse probe in pure water and dry it.

5.2 Stir probe in sample solution gently, leave it to stand. Get readings after

comes up and stays.

■Special Notes

After each use, users should rinse the pH probe thoroughly.

For the premixed pH calibration buffer solutions, we recommend replacing

them after 10 to 15 times of use to keep its accuracy.

The instruments will NOT give accurate and stable pH readings when

testing distilled or deionized water. This because distilled and deionized

water do not have enough ions present for the electrode to function

properly. To measure distilled or deionized water’s pH, users need to use a

specialized electrode.

Do not store probe in distilled water or deionized water because they will

cause damage to the glass membrane of the pH probe. The probe should

be stored in 3M KCL solution for best accuracy or stored without any

liquid.

6. Parameter Setting

6.1 Setting Schedule

6.2 Parameter Setting

When turned off, long press to enter setup →short press to switch

P1-P2→Short press , parameter flashing→short press to choose,

short press to confirm parameter selection→Long press to switch off.

6.3 Parameter setting instruction

Select standard pH buffer solution (P1): There are two options of standard buffer

solutions: USA series and NIST series as the following chart:

Prompt

Mark

Parameter Setting Items

Code

Factory

Default

Select pH buffer

USA –NIST

USA

Back to Factory Default

No –Yes

Icons

pH standard buffer solution series

USA series

NIST series

Three-Point

calibration

1.68 pH and 4.00 pH

1.68 pH and 4.01 pH

7.00 pH

6.86 pH

10.01 pH and 12.45 pH

9.18 pH and 12.45 pH

6.4 For the self-diagnosis information, please refer to the table below:

Symbol

Self-Diagnosis information

How to fix

Wrong pH calibration solution, which

exceeds the recognizable range of

the meter.

1. Check if calibration solution is correct

2. Check if probe isdamaged.

Is pushed before measurement is

stable ( comes up)

Wait for the smile icon to come up and

then press

7. Technical Specifications

Range

0 - 14.0 pH

Resolution

0.1 pH

Accuracy

±0.1 pH

Calibration Points

1 - 3 points

Automatic Temperature Compensation

0 - 50℃

Temp.

Range

0 - 50 ℃

Resolution

0.1 ℃

Accuracy

±0.5 ℃

8. Tester Functions

8.1 Calibration points indication:

8.2 Stable Measurement:

8.3 Self-Diagnostic information:：Er1, Er2

8.4 Low-Voltage warning: flashes, reminder of battery replacement

8.5 Auto Power-Off in 8 minutes if no operation.

9. Warranty

We warrant this instrument to be free from defects in material and workmanship

and agree to repair or replace free of charge, at option of APERA INSTRUMENTS,

LLC, any malfunctioned or damaged product attributable to responsibility of APERA

INSTRUMENTS, LLC for a period of two years from the delivery (a six-month limited

warranty applies to probes). This warranty does not apply to defects resulting from

actions such as misuse (violation of the instructions in this manual or operations in

the manner not specified in this manual), improper maintenance, or unauthorized

repairs. Warranty period is the time limit to provide free service for the products

purchased by customers, not the service life of the tester or probe.

*Apera Instruments reserves the right to update the information in this manual without giving notice in advance.

APERA INSTRUMENTS, LLC

Address: 977 Old Henderson Rd, Columbus Ohio 43220

Tel: 1-614-285-3080

Email: info@aperainst.com

Website: www.aperainst.com

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