Thermo Fisher Scientific EC/TDS/SaltTestr User Manual

Ec/tds/salt testr, Instruction manual

NSTRUCTION MANUAL

EC/TDS/SALT Testr

Large Screen

Waterproof Conductivity/TDS/Salt Tester

Introduction

Thank you for selecting our microprocessor-based waterproof EC / TDS / SALT tester with large

dual line display. You have one of the following models:

• ECTestrlow

• ECTestrlow+

• ECTestrhigh

• ECTestrhigh+

• ECTestrpure+

• TDSTestrlow

• TDSTestrlow+

• TDSTestrhigh

• TDSTestrhigh+

• TDSTestrpure+

• SALTTestr

The non plus models are designed with user-replaceable two-pin type sensor with many user friendly

features such as the Hold function, Automatic Temperature Compensation and Self-Diagnostic Messaging

capabilities. The plus models, with the user-replaceable cup type sensor, have more additional

features such as simultaneous temperature display, °C or °F selection, and have higher resolution

measurement.

This manual provides a step-by-step guide to operate the testers.

Before you begin:

Remove the electrode’s protective cap. Soak the electrode for a few minutes in alcohol to remove any

oil stains on the electrodes which will affect the accuracy of the tester. Rinse thoroughly with de-

ionized water and shake off dry.

Calibration

The tester is factory calibrated. However, to ensure accuracy, you can calibrate the tester on a regular

basis. Depending on the model selected, you can calibrate the Conductivity / TDS / Salt / Temperature

on a one point calibration using the appropriate calibration standard.

The following table lists each model allowable calibration range when selecting a calibration standard.

It is best to select a standard close to the test solution value.

This Instruction Manual is also available for download on our Web-site: eutechinst.com or 4oakton.com

M o d e l

E C T

E C Te s t r

e s t r

e s t r l o

l o

l o wwwww

E C T

E C Te s t r

e s t r

e s t r l o

l o

l o w +

w +

w + E C T

E C T

E C Te s t r h i g h

e s t r h i g h

E C T

E C Te s t r h i g h +

e s t r h i g h +

E C T

E C Te s t r

e s t r

e s t r p u r

p u r

p u r e +

e +

Calibration

200 to 1990

200 to 1999

2.00 to 19.90

2.00 to 19.99

20.0 to 199.9

Standard Range

uS/cm

mS/cm

uS/cm

Model

TDST

TDSTestr

estr

estr lo

lowwwww TDST

TDST

TDSTestr

estr

estr lo

low+

w+ TDST

TDST

TDSTestrhigh

estrhigh

estrhigh TDST

TDST

TDSTestrhigh+

estrhigh+

estrhigh+ TDST

TDST

TDSTestr

estr

estr pur

pur

pure+

e+ S A L

S A L

S A LTTTTTestr

estr

Calibration

200 to

1.00 to

20.0 to

1.00 to

Standard Range

1990 ppm

1999 ppm

10.00 ppt

199.9 ppm 10.00 ppt

Measurement

1. Press the ON/OFF button to switch the tester on.

2. Dip the electrode into the test solution making sure that it is fully immersed. Stir to clear any

trapped air bubbles from the electrode and let the reading stabilize. For plus models, you

can opt for the cup style measurement by filling the electrode cup with sample of test solution.

3. Note the value or press HOLD button to freeze the reading. To release the reading, press HOLD

again.

4. Press ON/OFF to turn off tester. If you do not press a button for 8.5 minutes, the tester will

automatically shut off to conserve batteries.

Figure 2: Example of a Power Up Sequence

Figure 3: Example of HOLD Function

Temperature Mode Selection (Only for PLUS Models)
This feature lets you select either the Celsius (°C) or the Fahrenheit (°F) temperature mode

display.

From the measurement mode,

1. Press °C/°F button to select the desired temperature mode. The temperature

display will toggle between the Celsius reading and the Fahrenheit reading.

Figure 4: Example of a temperature mode selection

1. Organise your calibration standard solution in two beakers – one for rinsing and

the other for calibration. Prepare separate de-ionized water for electrode rinsing.

2. Twist off and open the battery compartment lid (the cap with the lanyard loop).

You will see two switches – the INC (increment) and DEC (decrement) keys.

3. Switch on the unit using the ON/OFF key.

4. Rinse the electrode in de-ionized water and then rinse with the calibration

standard.

5. Dip the electrode to the calibration standard intended for calibration

and swirl gently to create a homogenous sample. Wait for the reading

to stabilize.

6. Press the INC or DEC key to enter calibration mode and to adjust the

reading to the calibration standard value. The upper display will be the

adjustable reading for calibration whereas the lower display will be the

default reading of the standard.

Note: At this point, the non-plus models will have its upper and lower display showing readings

with resolution of its plus version. Reading adjustment can then be made from its last significant

digit. Upon confirming the calibration, the reading changes back to its original resolution.

7. Wait for 5 seconds for the tester to automatically confirm the calibration value by displaying

“CO” and return to the measurement mode.

8. Replace the battery compartment lid. The tester is now ready for measurement.

Note: To exit this program without confirming the calibration, press the HOLD button before the

automatic confirmation takes place.

Note: The tester will exit calibration mode with “Er.0” message if the temperature is outside the

0 to 50°C range. Please refer to information under ’Self Diagnostic Messages’.

Note: The calibration window is +/- 50% from the default reading of the standard.

HOLD Function

This feature lets you freeze the display for a delayed observation.

1. Press HOLD button to freeze the measurement. A ‘HOLD’ indicator will be displayed and the

measurement will be frozen.

2. Press HOLD again to release the measurement. The ‘HOLD’ indicator will not be displayed

anymore indicating the held measurement is released.

Figure 1: Example of a calibration sequence using 2764 µS calibration standard

Table 1

INC Key

TDS Factor Setting (Only for TDS Models)

The TDS models features includes the setting of the TDS factor. You can adjust the TDS factor from 0.4

to 1.0.

From the measurement mode,

1. Press HOLD button to bring the tester to the HOLD mode.

2. Press either the INC or DEC key to enter the TDS Factor Setting mode. The upper display will

be the adjustable TDS factor whereas the lower display will be the last TDS Factor setting.

3. Use the INC or DEC key to set the correct TDS factor for your sample measurement.

4. Wait for 5 seconds for the tester to automatically confirm the new setting by displaying “CO”

and return to the measurement mode.

Figure 5: Example of setting the TDS Factor

Electrode Maintenance

1. Always keep the sensor electrodes clean. Rinse the electrodes with de-ionized water and

wipe them dry with clean cloth before storing with its protective cap. For the plus models,

remove the white plastic cup insert to thoroughly clean viscous solutions. Never scratch

the electrodes with a hard substance.

2. For better performance, soak the electrode in alcohol for 10 to 15 minutes and rinse with

de-ionized water before starting any measurement process. This is to remove dirt and oil

stains on the electrode which may affect the accuracy of the measurements.

After 5 sec,
“CO” is
displayed
signifying
automatic
confirmation

INC

DEC

INC

DEC

After 5 sec,
“CO” is
displayed
signifying
automatic
confirmation

INC

DEC

INC

DEC

ON/OFF