Apera Instruments EC20 Pocket Conductivity Tester Instruction Manual

1. Battery Installation

Please install batteries according to the following steps. *Please note the correct direction of battery installation:

The Positive Side ("+") OF EVERY SINGLE Battery MUST FACE UP. (WRONG INSTALLATION OF BATTERIES WILL CAUSE DAMAGE TO THE TESTER AND POTENTIAL HAZARDS!) ⚠️

(batteries are pre-installed)

Illustration showing seven steps for installing AAA batteries into the Apera EC20 tester. Step 1 shows the tester with the battery cap removed. Steps 2-6 show the insertion of four AAA batteries, noting the positive (+) terminal facing up. Step 7 shows the battery compartment closed.

2. Keypad Functions

Short press: < 2 seconds

Long press: > 2 seconds

• [MEAS] Button: 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;
• [CAL] Button: 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 of the Apera EC20 conductivity tester, labeling the Battery Cap, LCD Screen, Keypad, BPB Probe, and Probe Cap.

3. Complete Kit

Visual representation of the Apera EC20 Pocket Conductivity Tester kit contents, including the tester unit, a lanyard, four AAA batteries, and two bottles of calibration solution.

4. Calibration

4.1 Rinse the probe in distilled water and dry it with a clean tissue. Short press [MEAS] to turn on the tester.

4.2 Long press [CAL] to enter calibration mode; Short press [MEAS] to exit.

4.3 Dip the probe into 1413 µS/cm calibration solution. Stir gently, leave it to stand. LCD displays ? (Diagram 3), short press [CAL] to complete 1-point calibration. The tester returns to measuring mode, and calibration icon [M] appears at the bottom left of LCD.

Close-up of the Apera EC20 tester's LCD screen during calibration. It displays a conductivity reading of '1433' and a calibration solution value of '1413', accompanied by a stable smiley face icon (?) and the calibration indicator 'M'.

4.4 Rinse probe in distilled water and dry it. Follow the steps in 4.2-4.3 to complete 2nd point calibration in 12.88 mS/cm calibration solution. Tester returns to measurement mode, calibration icons [M] [H] display on bottom left of LCD.

5. Conductivity Measurement

5.1 Short press [MEAS] to turn on tester. Rinse probe in distilled water and dry it with a clean tissue to remove excess water.

5.2 Stir the probe in the sample solution gently, leave it to stand. Get readings after the smile icon (?) comes up and stays.

5.3 Rinse off the tester thoroughly in distilled water after each test.

6. Notes

6.1 For first-time use or if the tester hasn't been used for a long time, soak the probe in 12.88 mS/cm solution for 15-30 minutes to restore sensitivity and speed up response time.

6.2 The tester uses 1413 µS and 12.88 mS standard calibration solutions. Users can perform 1- or 2-point calibrations as needed. For most circumstances, calibrating in 1413 µS for the first point meets testing requirements.

6.3 Unit Information: 1 mS/cm = 1000 µS/cm. Readings greater than 2000 µS/cm automatically switch to mS/cm.

6.4 Self-Diagnosis Functions

6.5 The tester is pre-calibrated from the factory. Users can typically use it immediately or test its accuracy with calibration solutions. If a large error is detected, calibrate before use.

7. Parameter Setting

7.1 Parameter Setting Reference Chart

7.2 How to Setup Parameters

When turned off, long press [MEAS] to enter setup. Short press [MEAS] to switch between P1-P2-P3. Short press [CAL], parameter flickers; short press [MEAS] to choose; short press [CAL] to confirm parameter selection. Long press [MEAS] to switch off.

7.3 Parameter Setting Notes

a) Select conductivity ranges (P1): Aut-- All ranges: 0~199.9 µS/cm, 20~1999 µS/cm, 2.0~20.0mS/cm. Factory default is Aut.

b) P2-Select temperature unit (°C-°F): In P1 mode, press [MEAS] to enter P2. Press [CAL], °C or °F flickering. Press [MEAS] to choose °C-°F. Press [CAL] to confirm parameter selection. Long press [MEAS] to return to measurement mode.

c) Restore to factory default: Select Yes to restore calibration to theoretical values and parameter settings to original values. This function can be used if the meter's calibration or measurement performs abnormally, allowing it to revert to factory default settings for subsequent calibration or measurement.

8. Technical Specifications

9. Other Functions & Parameters

10. Warranty

Apera Instruments warrants this instrument to be free from defects in material and workmanship. Apera Instruments (Europe) GmbH agrees to repair or replace, free of charge, any malfunctioned or damaged product attributable to its responsibility for a period of two years from delivery (a six-month limited warranty applies to electrodes). The warranty period is the time limit for providing free service for products purchased by customers, not the service life of the tester or electrodes.

This limited warranty does not cover any damages due to:

• transportation;
• storage;
• improper use;
• failure to follow the product instructions or to perform any preventive maintenance;
• modifications;
• combination or use with any products, materials, processes, systems, or other matter not provided or authorized in writing by Apera Instruments;
• unauthorized repair;
• normal wear and tear; or
• external causes such as accidents, abuse, or other actions or events beyond Apera Instruments' reasonable control.

Contact Information

APERA INSTRUMENTS (Europe) GmbH

Wilhelm-Muthmann-Straße 18

42329 Wuppertal, Germany

Contact: info@aperainst.de

Website: www.aperainst.de

Tel: +49 202 51988998