Portable

Conductivity Meter

M1410 User Manual

1.002

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General information

This manual describes the operation of the Portable Conductivity Meter M1410. Please read

this entire manual before operating this equipment, to ensure proper and safe operation of

the product. And keep this manual carefully, so it is readily available whenever necessary.

Product and manual are subject to change without notice.

Safety information:

WARNING

Meter Do not take apart or modify the meter. Otherwise, it may heat up

or be ignited or an accident.

Battery Keep batteries away from children. If someone swallows a battery

accidentally, consult doctor immediately.

If alkaline fluid from a battery gets into the eyes, do not rub the

eyes, rinse with clean water immediately, then consult doctor.

Do not put batteries in a fire, expose to heat, disassemble or

remodel, it could cause fluid leaking, overheating or explosion.

Product information

Only use the product including accessories for their intended purpose.

This meter is shockproof, but severe impact could damage it.

The surface is made of TPE, keep the meter away of strong acid or alkali solution.

Do not heat to dry it with heating unit, such as electric hair drier.

This meter is a dust-proof and waterproof design. But does not guarantee

non-destructive, trouble-free, dust-proof, and waterproof performance in high dust or

high salt mist environment.

Do not replace the batteries in a dusty place or with wet hands

The Ni-MH rechargeable battery can be used in this meter, but the battery life ICON will

be not correct.

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Contents: General information............................................................................................................................................1

Safety information: ..............................................................................................................................................1

Product information ...........................................................................................................................................1

FEATURES ...............................................................................................................................................................3

Meter and operation ..........................................................................................................................................3

Meter overview ...........................................................................................................................................4

Display ..................................................................................................................................................5

Keypad description ...........................................................................................................................6

Operation ......................................................................................................................................................6

Startup ..................................................................................................................................................6

Select the MODE ...............................................................................................................................6

Using the backlight ...........................................................................................................................8

Entering numeric values .................................................................................................................8

Auto Power-off ..................................................................................................................................9

Measurement ........................................................................................................................................................9

Preparation ...................................................................................................................................................9

Battery Installation ............................................................................................................................9

Connect a probe ............................................................................................................................ 10

Measurement ............................................................................................................................................ 10

Calibration ........................................................................................................................................ 12

Set the Factors ................................................................................................................................ 13

Specifications ..................................................................................................................................................... 14

Conductivity probe: ................................................................................................................................ 14

Appendix ............................................................................................................................................................. 15

Calculating Temperature Coefficients .............................................................................................. 15

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FEATURES

IP67 Waterproof

Float

Shockproof

2*AAA Battery

Conductivity; TDS; Salinity Measurement

Auto Ranging

2 data points for Calibration

Automatic Temperature Compensation

Restore Factory Default

Hold Function

Auto Power-Off

Meter and operation

This section describes the name of each part and the main function, and basic operation.

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Meter overview

No. Name Description

1 LCD with backlight Display the readings and parameters

2 Keys Power/Back Light; Mode; Hold/Set.

3 Probe connection port 4-pin IP-68 waterproof connector

4 Battery Cover On the bottom of the instrument.

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Display

No. Name Description

1 Scale Name Displays the scale name

2 Battery Status Displays the battery level

3 Scale

Unit

Current measurement scale unit

4 2nD

Figure Area

Displays the Temperature or others parameters

5 Hold Icon The reading will be frozen when this icon was shown.

6 Wireless

Connection

The meter has been connected to a host device while this

icon is shown. (This function is not for the M1410)

7 Functions User can change the function by the mode key,

8 SLOPE Only for the pH electrode, not for the M1410

9 ATC This icon will be displayed if the conductivity electrode has

been connected to the meter,

The temperature sensor could be detected by the meter.

10 Ready Icon Displayed when measuring results are stable

11 1st

Figure Area

Displays the scale readings and settings.

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Keypad description

No. Name Function

1 POWER

/BACKLIGHT

Turn on the meter by pushing once

Turn off the meter by holding for 3 seconds

Turn on/off the backlight by pushing once when the meter

is power on.

2 Mode

Change the scale, Temperature unit, and set the parameters

3 Hold/Set

Hold the readings

Set is used as the confirmation key in the status of the

Mode

Operation

Startup

Push the key to turn on ，push the key for 3 seconds to turn off the

meter. If the meter does not turn on, make sure that the batteries are properly installed.

Select the MODE

One item of Mode will flash in proper order by pushing the key once, when meter

is on. Push the HOLD/SET key to confirm or enter when the icon flash.

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No. MODE Description

1 MODE1:

Measurement

mode

Select an option from a scale list: CON, TDS, SALT.

Use the MODE key to select an option. Push the HOLD/SET

key to confirm when the scale icon flash, and return to

Measurement Mode.

2 MODE2 Select the temperature unit.

3 MODE3:

Function

mode

Select the Function from CALIBRATION, SET FACTOR and

RESET; use the MODE key to select a function. Push the

HOLD/SET key to enter

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Note of MODE3: Function mode

CALIBRATION: The meter could automatically recognize the solution, and calibrate

the reading to 12.88 mS or 1413 μS.

SET TDS FACTOR: To set the factor for the TDS calculation from the conductivity

reading. Default setting is 0.50.

SET ATC FACTOR: To set the temperature compensation factor. Default setting is

2.1%.

RESET: The meter will be reset to the factory setting.

Push the key and select the RESET function.

The previous Calibration information of the user will be deleted.

The TDS FACTOR will be 0.50.

The ATC FACTOR will be 2.1%

The Temperature UNIT will be “℉”.

NOTE:

CALIBRATION, SET TDS FACTOR and SET ATC FACTOR: More details in the Measurement.

Using the backlight

When it is difficult to see the LCD in the dark, you can turn on the backlight by pressing the

key.

Note:

Turning on the backlight consumes energy and shortens battery life.

Entering numeric values

If the user want to set the parameter value and the meter is already in the setting modes,

push the key once to increase the value, hold down the key to

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continually decrease the value.

Auto Power-off

The meter will automatically power off without any operation for 8 min.

Measurement

This section describes the method of measurement.

Preparation

To make sure that the electrode is not stained or damaged.

According to your applications, the standard solution will be helpful to the accurate reading.

Do not use the instrument near any noise source.

Battery Installation

This instrument is operated by batteries. You can use AAA alkaline batteries or AAA NiMH

rechargeable batteries. Perform the following procedure to insert batteries in the meter.

1. Turn the screws on the battery cover counterclockwise and remove the cover.

2. Install 2 AAA alkaline or 2 AAA nickel metal hydride batteries.

3. Make sure that the batteries are installed in the correct polarity.

4. Put the battery cover back.

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Connect a probe

1. Plug the probe into the meter.

2. Push and turn the Plug tight nut to tighten.

Measurement

1. Push the key and select the scale.

2. Push the key to confirm the selection when scale icon flash.

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3. Put the probe into the solution and shake the probe gently to remove bubbles from the

surface of the electrode.

4. There should be above 3cm from the probe bottom to the beaker bottom.

5. icon will display when the readings are stable。

6. Record the readings.

7. Put the electrode out of the solution, and rinse it with deionized water.

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Calibration

1. Same as the measurement, put the electrode into the standard solution (12.88mS,

1413uS) until the readings are stable.

2. Push the key to select the calibration function and Push key to

confirm.

3. When the procedure is completed, End will be displayed.

4. The meter will return to measurement mode automatically.

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Set the Factors

Two factors could be modified by user: TDS Factor, and ATC Factor.

1. Push the key to select the SET TDS FACTOR or SET ATC FACTOR function and

Push key to confirm it.

2. Push the key to change the setting. Push the key once to increase

the value, hold down the key to continually decrease the value.

3. Press the key to confirm and return the measurement mode.

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Specifications

Specification Description

Model M1410

Scale Conductivity; TDS; Salinity;

Operating temperature 0 – 40 ℃

Operating humidity 0 – 80%(non-condensing)

Power supply 2 X AAA Alkaline batteries

Dimensions 60*70*36mm

Weight Approximate to 226 g

Temperature Sensor NTC Thermistor

Range 0-80 ℃

Resolution 0.1 ℃

Accuracy ± 0.5 ℃

Conductivity Sensor 2-Cell

Range 0 – 200 mS

Resolution 0.1% full scale

Accuracy ±1.0%(0.00 – 100.0 mS);

±1.5%(100.0 – 200.0 mS)

TDS Sensor Calculate from the Conductivity

Range According to Conductivity

Resolution 0.1% full scale

Accuracy According to Conductivity

Salinity Sensor Calculate from the Conductivity

Range 0.0 - 40.0 ppt(Display Range: 0.0 – 100.0 ppt)

Resolution 0.1 ppt

Accuracy ±0.4% full scale

Conductivity probe:

Include a graphite conductivity probe (k=1).

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It has been software optimized. In the range: 10.0uS – 100.0mS, the 1% accuracy can be

achieved. In the other range, the accuracy is around ±1.5%. At both Endpoints, the

accuracy is ±2%.

Appendix

* If you do not know the temperature coefficient of your solution you can determine the

correct value using the formula in Appendix “Calculating Temperature Coefficients”.

Calculating Temperature Coefficients

To determine the temperature coefficient of your sample solution use this formula:

𝐓𝐂 = 100 x𝐂𝐓𝟐−𝐂𝐓𝟏

𝐂𝐓𝟏(𝐓𝟐 − 𝟐𝟓) − 𝐂𝐓𝟐(𝐓𝟏 − 𝟐𝟓)

TC = Temperature coefficient

CT1 =Conductivity at Temp. 1

CT2 = Conductivity at Temp. 2

T1 = Temp. 1

T2 = Temp. 2

25 = 25°C

A controlled temperature water bath is ideal for this procedure.

1. Immerse the probe into a sample of your solution and adjust the temperature coefficient

to 0% (that is, no compensation) by performing the following:

2. Wait for 5 minutes. Note T1 and CT1 (conductivity at T1).

3. Condition the sample solution and probe to a temperature (T2) that is about 5°C to 10°C

different from T1, and note the conductivity reading CT2.

NOTE: Record your results for future reference. Ideally T1 and T2 should bracket your

measurement temperature, and should not differ by more than 5°C.

4. Calculate the temperature coefficient of your solution according to the formula shown

above.

5. Enter the temperature coefficient you calculated into the meter.

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The calculated temperature coefficient will now be applied to all the meter readings.

To determine the conductivity to TDS conversion factor for your solution:

Appendix

1. Factor—the conductivity to ppm TDS conversion factor. Multiply conductivity by this factor

to get ppm TDS for the type of TDS reading needed.

2. 442—a formulation that most closely represents the conductivity to ppm relationship, on

average, for naturally occurring fresh water.

3. TDS Your Material—These columns are for you to write in your application-specific

conductivity-to-ppm values and conversion factors for future reference.

Factor = actual TDS ÷ Actual Conductivity @ 25°C lists some commonly used

conversion factors.

Conductivity

at 25°C

TDS KCl TDS NaCl TDS 442 TDS Your

Material

ppm

Value

Factor ppm

Value

Factor ppm

Value

Factor ppm

Value

Factor

1413 μS 744.7 0.5270 702.1 0.4969 1000 0.7078

12880 μS 7447 0.5782 7230 0.5613 11,367 0.8825