SOIL

MOISTURE METER

Model : DSMM500

Your purchase of this

SOIL MOISTURE METER marks a step forward for you into the field of precision measurement.

Although this METER is a complex and delicate instrument, its durable structure will allow many years of use if p r o p e r o p e r a t i n g t e c h n i q u e s a r e developed. Please read t h e f o l l o w i n g instructions carefully and always keep this manual within easy reach.

OPERATION MANUAL

TABLE OF CONTENTS

1. FEATURES.................................................................1

2. SPECIFICATIONS.......................................................1

3. FRONT PANEL DESCRIPTION..................................... 3

3-1 Soil moisture Probe..............................................3

3-2 Moisture Sensing Head.........................................3

3-3 Power Button...................................................... 3

3-4 Hold Button.........................................................3

3-5 REC Button..........................................................3

3-6 LCD Display.........................................................3

3-7 Battery Compartment/Cover.................................3

4. MEASURING PROCEDURE..........................................4

4-1 Measurement by selecting the different

material............................................................4

4-2 Data Hold............................................................5

4-3 Data Record........................................................ 5

5. BATTERY REPLACEMENT...........................................6

1. FEATURES

* Designed to check the moisture level of soil or other similar material.

* Measurement range : 0 % to 50 % moisture content of soil sample with 0.1 % resolution.

* All in one digital soil meter, easy to make operation.

* Data hold function to freeze the desired value on display.

* Microprocessor circuit ensures high accuracy and provides special functions and features.

* Operates from DC 1.5V ( UM4/AAA ) x 4 PCs batteries.

* Built-in low battery indicator.

* Durable, long-lasting components, enclosed in strong, compact ABS-plastic housing.

2. SPECIFICATIONS

Applications

Measuring

Principal

Display

Designed to check the moisture level of soil or other similar material.

Used the 2 pins electrode to measure the conductive ability of the species, then converter to the reading of % " Moisture content " of soil sample.

LCD size : 28 mm x 19 mm.

1

Measurement 0 % to 50 % moisture content on soil.

Range

Resolution 0.1 %.

Accuracy

Circuit

± ( 5 % + 5 d ) F.S.

@ 23 ± 5 , F.S. : full scale.

Custom one-chip of microprocessor LSI

Probe

Data Hold circuit.

2 pins moisture electrode.

Freeze the display reading.

Sampling Time Approx. 0.8 second.

Operating

Temperature

Operating

Humidity

Less than 80% R.H.

Power Supply DC 1.5 V battery ( UM4/AAA ) x 4 PCs,

Power Current Approx. DC 5 mA

Weight 267 g/ 0.58 LB.

@ Battery is included.

Dimension Meter body :

172 x 40 x 40 mm ( 6.8" x 1.6" x 1.6" ).

Probe body :

202 mm x Dia. 10 mm

Accessories

Included

8" x Dia. 0.4" .

Total length ( meter + probe ) :

374 mm ( 14.7 " ).

Instruction manual.................. 1 PC.

2

3. FRONT PANEL DESCRIPTION

Fig. 1

3-1 Soil moisture Probe

3-2 Moisture Sensing Head

3-3 Power Button

3-4 Hold Button

3-5 REC Button

3-6 LCD Display

3-7 Battery Compartment/Cover

3

4. MEASURING PROCEDURE

4-1 Soil measurement

1)Turn on the meter by pressing the " Power Button "

( 3-3, Fig. 1 ) momentarily.

* Press the " Power Button " ( 3-3, Fig. 1 ) momentarily again will turn off the meter.

2)Insert the " Moisture sensing head " ( 3-2, Fig. 1 ) into the measured soil.

It is recommended that probe head should be inserted into the soil at least 10 cm when make the measurement..

Soil moisture

Probe

Fig. 2

Moisture

Sensing Head

Consideration :

If the sample soil under testing has a high moisture content it may take a few minutes to obtain a stable reading.

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4-2 Data Hold

* During the measurement, press the " Hold Button "

( 3-4, Fig. 1 ) momentarily to hold the measured value. The LCD will show a " HOLD " symbol.

* Press the" Hold Button " once again to release the data hold function.

4-3 Data Record ( Max., Min. reading )

1)The data record function records the maximum and minimum readings. Press the " REC Button " ( 3-5, Fig.

1 ) momentarily to start the Data Record function, shows " REC " on the display.

2)With the " REC " symbol on the display.

a) Press the " REC Button " ( 3-5, Fig. 1 ) momentarily, the " REC MAX " symbol along with the maximum value will appear on the display.

b)Press the " REC Button " ( 3-5, Fig. 1 ) momentarily again, the " REC MIN " symbol along with the minimum value will appear on the display.

* When display shows " REC MAX " or " REC MIN ", press the " Hold Button " ( 3-4, Fig. 1 ) momentarily will delete the max. ( min. ) value, the display will show the " REC. " only and execute the memory function continuously.

c) To exit the memory record function, press the

" REC " button for 2 seconds at least. The display will revert to the current reading, not show " REC "

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5. BATTERY REPLACEMENT

* Replace the batteries when the left corner of the LCD displays the low battery icon " ", using 4 fresh

1.5 V ( UM4, AAA ) batteries.

* To change the batteries, open ( rotate clockwise direction )

the " Battery Cover " ( 3-7, Fig. 1 ).

* Make sure the " Battery cover " (3-7, Fig 1) is secured after changing the batteries.

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0904-PMS714-GENERAL-DSMM500