Labco SCIENTIFIC TDS20 Pocket TDS Tester User Manual

Labco SCIENTIFIC TDS20 Pocket TDS Tester

Technical Specifications

• Model: TDS20 Pocket TDS Tester
• Power Source : 2 x AAA batteries
• Measurement Range : 0-9990 ppm (parts per million)
• Accuracy : ±2%
• Dimensions: 150mm x 25mm x 15mm

Product Usage Instructions

Battery Installation

Please install batteries according to the following steps. Please note polarity: + (anode) is upward; – (cathode) is downward.

Keypad Functions

Short press < 2 seconds

Long press > 2 seconds

• Short press to turn on, long press to turn off;
• When turned off, long press to enter setup;
• In the mode setting, short press to change the parameter;
• When turned on, long press to enter calibration mode;
• In calibration mode, short press to confirm calibration;

Complete Kit Calibration

1. Rinse the probe in distilled water and dry it. Short press to turn on the tester.
2. Long press to enter calibration mode; Short press to exit.
3. Short press to complete 1-point calibration.
4. Rinse probe in distilled water and dry it. Follow the steps to complete 2nd point calibration in the calibration solution.

TDS Measurement

1. Short press to turn on the tester. Rinse the probe in distilled water and dry it.
2. Stir the probe in the sample solution gently, and leave it to stand. Get readings after the smile icon comes up and stays.

Parameter Setting

1. When turned off, long press to enter setup; short press to switch parameters.
2. Short press, parameter flickering, short press to choose, short press to confirm parameter selection.
3. Long press to switch off.

FAQ

• Q: Do I need to calibrate the tester before use?
  • A: 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 an error is large, calibrate it before using it.
• Q: How often should I replace the calibration solutions?
  • A: We recommend replacing new calibration solutions after 5-10 times of calibrations to keep the solution’s accuracy.

BATTERY INSTALLATION

Please install batteries according to the following steps. Please note polarity: “+” (anode) is upward; “-” (cathode) is downward.

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 the mode setting, short press to change the parameter;

4. When turned on, long press to enter calibration mode.

5. In calibration mode, short press to confirm calibration;

6. In mode setting, short press to confirm parameter selection.

COMPLETE KIT

CALIBRATION

Rinse the probe in distilled water and dry it. Short press to turn on the tester.
Long press to enter calibration mode; Short press to exit.
Dip the probe into the 1413 µS calibration solution. Stir gently, leave it to stand, LCD displays (Diagram 3), and short press to complete 1-point calibration. The tester returns to measuring mode, and the calibration icon appears at the button left of the LCD.
Rinse the probe in distilled water and dry it. Follow the steps in 4.2-4.3 to complete 2nd point calibration in 12.88 mS calibration solution, The tester returns to measuring mode, calibration icons display on the bottom left of the LCD.

TDS MEASUREMENT

Short press to turn on the tester. Rinse the probe in distilled water and dry it.
Stir probe in the sample solution gently, and leave it to stand. Get readings after the smile icon comes up and stays.

NOTES

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.
The tester has self-diagnosis functions:

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 an error is large, calibrate it before using.
We recommend replacing new calibration solutions after 5-10 times of calibrations to keep the solution’s accuracy.

PARAMETER SETTING

Parameter setting reference chart:

How to Setup parameters:

When turned off, long press to enter setup → short press to switch P1-P2→ Short press , parameter
flickering → short press to choose, short press to confirm parameter selection → Long press to switch off.

Parameter setting notes:

a) TDS Factor (P1):

Users can adjust TDS Factor by experimental data or experience. The following chart lists some commonly used TDS Factors for reference.

Conductivity and TDS Factor

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.

TECHNICAL SPECIFICATIONS

OTHER FUNCTIONS & PARAMETERS

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 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, and 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.

Printed technical specifications are subject to change without notification

Labco® is a registered trademark.

See the full product range online.

CONTACTS

• 1800 052 226
• sales@labcoscientific.com.au
• labcoscientific.com.au
• sales@labcoscientific.com.au
• labcoscientific.com.au
• 1800 052 226
• PO Box 5816, Brendale, QLD 4500

References

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