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Technical Sheet

MANUAL - Apera EC20 Conductivity Meter

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Applies to EC Meter Digital Kit with ATC - EC Tester High

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EC20 Pocket Conductivity Tester Instruction Manual

APERA INSTRUMENTS, LLC

v2.2

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!)

[Diagram showing 7 steps for installing 4 AAA batteries into the tester]

  1. Keypad Functions ■Short press------- < 2 seconds ■Long press-------- > 2 seconds
[Power/Meas icon] 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 icon] 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: Labeled diagram of the tester showing Battery Cap, LCD Screen, Keypad, BPB Probe, and Probe Cap]

  1. Complete Kit

[Diagram - 2: Illustration of the kit contents including Calibration Solution, EC Tester, Lanyard, and AAA Batteries] (batteries are pre-installed)

  1. Calibration 4.1 Rinse the probe in distilled water and dry it with a clean tissue. Short press [Power/Meas icon] to turn on the tester. 4.2 Long press [Cal icon] to enter calibration mode; Short press [Power/Meas icon] to exit. 4.3 Dip the probe into 1413 µS/cm calibration solution. Stir gently, leave it to stand, LCD displays [Smile icon] (Diagram 3), short press [Cal icon] to complete 1-point calibration. The tester returns to measuring mode, and calibration icon (M) appears at the bottom left of LCD. 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.

[Diagram - 3: Illustration of LCD screen showing 1433 µS, 1413, and a smile icon]

  1. Conductivity Measurement 5.1 Short press [Power/Meas icon] 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.

  2. Notes 6.1 If it’s first time use or the tester hasn’t been used for a long time, we recommend soaking the probe in 12.88 mS/cm solution for 15-30 minutes to restore its sensitivity and speed up the response time. 6.2 The tester adopts 1413 µS and 12.88 mS standard calibration solutions. Users can use 1-2 point calibrations as needed. For most circumstances, calibrating in 1413 µS to complete 1st point calibration will meet testing requirements. 6.3 Unit Information: 1 mS/cm = 1000 µS/cm Once the readings are greater than 2000µS/cm, the unit will automatically become mS/cm. 6.3 The tester has self-diagnosis functions:

Symbol Self-Diagnosis information How to fix
Er 1 Wrong calibration solution, which exceeds the recognizable range of the meter. 1. Check if calibration solution is correct 2. Check if probe is damaged.
Er 2 [Cal icon] is pushed before measurement is stable ([Smile icon] comes up and stays) Wait for the smile icon to stay, and then short press [Cal icon]

6.4 The tester has already been calibrated after manufacture. Usually users can use the tester right away, or test it in the calibration solutions to test its accuracy. When error is large, calibrate it before using.

  1. Parameter Setting 7.1 Parameter setting reference chart:
Symbol Parameter Setting content Code Factory Default
P1 Select conductivity ranges Aut-µS-mS Aut
P2 Restore to factory default No – Yes No

7.2 How to setup parameters: When turned off, long press [Power/Meas icon] to enter setup → short press [Power/Meas icon] to switch P1-P2→ Short press [Cal icon], parameter flickering→short press [Power/Meas icon] to choose, short press [Cal icon] to confirm parameter selection→Long press [Power/Meas icon] 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 – 20.0 mS/cm; Factory default is Aut. b) Restore to factory default: Select Yes to restore the calibration to the theoretical values and parameter setting to original values. When meter’s calibration or measurement performs abnormally, this function can be adopted so the meter goes back to factory default setting and then users can conduct calibration or take measurements again.

  1. Technical Specifications
Conductivity Range 0 – 200.0 µS/cm, 0 – 2000 µS/cm, 0 – 20.00 mS/cm
Resolution 0.1/1 µS/cm, 0.01 mS/cm
Accuracy ±1% F.S ± 1 digit
Calibration points 1-2 points auto calibration
Automatic Temp. Compensation 0-50˚C
Temp. Range 0-50˚C
Resolution 0.1˚C
Accuracy ±0.5˚C
  1. Other Functions & Parameters
Indication of calibration points (M) (H) Auto Power-off Power-off in 8 minutes if no operation
Indication of stable measurements [Smile icon] Waterproof level IP67, floats on water
Self-Diagnosis information Er1, Er2 Power Supply AAA batteries*4
Low battery reminder [Battery icon] Flashes to remind to replace batteries Battery Life Up to 1000 hours of continuous operation
Dimensions/Weight Instrument: 4031178mm/107g; Carrying case: 190165140mm/438g
  1. Warranty We warrant this instrument to be free from defects in material and workmanship and agrees 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 electrodes). Warranty period is the time limit to provide free service for the products purchased by customers, not the service life of the tester or electrodes.

This limited warranty does not cover any damages due to: i. transportation; ii. storage; iii. improper use; iv. failure to follow the product instructions or to perform any preventive maintenance; v. modifications; vi. combination or use with any products, materials, processes, systems or other matter not provided or authorized in writing by us; vii. unauthorized repair; viii. normal wear and tear; or ix. external causes such as accidents, abuse, or other actions or events beyond our reasonable control.

APERA INSTRUMENTS, LLC Address: 6656 Busch Blvd, Columbus Ohio 43229