JENCO VisionPlus EC 330 Manuale utente

Operation Manual

MODEL EC 330

Microcomputer Based

Conductivity /TDS

&Temperature Pocket

Meter

EC330

CONTENTS

INITIAL INSPECTION AND ASSEMBLY .....................2

VISIONPLUS EC 330 OVERVIEW................................2

A. Meter Description..................................................2

B. LCD Display ..........................................................2

OPERATION MODES AND KEYPAD OPERATIONS...3

A. Operation Modes.....................................................3

B. Keypad Operations...............................................3

BEFORE YOUR FIRST USE ..........................…………4

A. Insert Batteries ...........................................4

B. Soak the Electrode.... ..........................................4

C. Preparing Standard Solutions.................................4

D. Setup and Calibrate the Electrode and Meter...........5

USING VISIONPLUS EC 330........................................5

A. Power on/off ......................................................5

B. Calibrate Conductivity............................................5

C. Measure ..............................................................6

D. Hold Data ...........................................................6

REPLACE ELECTRODE…...........................................6

REPLACE THE OLD BATTERIES................................7

ERROR DISPLAYS AND TROUBLESHOOTING …....8

SPECIFICATIONS ......................................................9

WARRANTY ...............................................................10

INITIAL INSPECTION AND ASSEMBLY

Carefully unpack the instrument and accessories. Inspect for

damages made in shipment. If any damage is found, notify your

Jenco representative immediately. All packing materials should

be saved until satisfactory operation is confirmed.

VISIONPLUS EC 330 OVERVIEW

A. Meter Description

1. Battery cap

2. LCD screen

3. Keypad

4. Electrode collar

5. Electrode & ATC assembly

(Electrode cap is not shown.)

B. LCD Display

1. LOW BATTERY indicator

2. CALIBRATION mode indicator

3. MEASURE mode indicator

4. HOLD mode indicator

Hold

Cal Mode

EC 330

VisionPlus

5. CONDUCTIVITY/TDS mode indicator

6. CONDUCTIVITY/TDS unit indicator

7. CONDUCTIVITY/TDS reading

8. TEMPERATURE reading

9. TEMPERATURE unit indicator

OPERATION MODES AND KEYPAD OPERATIONS

A. Operation Modes

VisionPlus EC 330 meter has 3 operation modes:

1. Measure Mode. Measure Mode is used to make all

conductivity or TDS and temperature measurements.

2. Calibration Mode. Calibration Mode is used to perform

1 or 2 point calibration.

3. Hold Mode. Hold Mode is used to display the locked

reading for increased ease of use.

B. Keypad Operations

Key

Operation

Mode

Duration

Function

Hold

Measure

0 second

Holds current

measurement reading.

Press again to resume

measuring.

Hold

0 second

Returns to Measure Mode.

Measure

5 second

. Erases all stored data.

Cal

Measure

0 second

Enters Calibration Mode.

On/Off

All

0 second

Turns meter on/off.

Mode

Measure

0 second

Selects display mode:

conductivity (℃),

conductivity (℉),TDS(℃)

and TDS(℉).

BEFORE YOUR FIRST USE

A. Insert Batteries

1. Remove the battery cover

at the top of the unit.

2. Insert the set of batteries

(included) ensuring correct

polarities.

3. Securely replace battery

cover.

B. Soak the Electrode

1. Remove the electrode cap covering the VisionPlus EC 330

meter.

2. Soak the electrode in distilled water for 10 minutes before

first use or after storage.

C. Preparing Standard Solutions

Suitable conductivity standards are available commercially or the

user can prepare them using research grade reagents.

Here are some standard solutions the user can prepare to

calibrate the probe of the model EC330.

1. Standard solution of 1413uS at 25℃: Accurately weight out

0.746 grams of research grade dried Potassium Chloride

(KCL). Dissolve in 1000ml of distilled water.

2. Standard solution of 12.90mS at 25 ℃: Accurately weight

out 7.4365 grams of research grade dried Potassium

Chloride (KCL). Dissolve in 1000ml of distilled water.

[Note: You can store the remaining solution in a plastic container

for one week but the air space between the cap and the solution

must be kept to an absolute minimum. Storing the excess solution

below 4℃can increase the storage life. If you have any doubt of

the accuracy of the stored solution, a fresh batch should be

prepared.]

D. Setup and Calibrate the Electrode and Meter

VisionPlus EC 330 must be setup and calibrated before your

first use. Please follow the instructions detailed in section

USING VISIONPLUS EC 330 6.

USING VISIONPLUS EC 330

A. Power On/Off

Press the “On/Off ” key to turn the unit on. If the unit is running

then you can press the ”On/Off “ key to turn the unit off. The unit

will automatically turn off after 10 minutes of no key activity.

[Note: The unit will not automatically shut off if it is still immersed

in solution even after 10 minute of no key activity.]

B. Calibrate Conductivity

The user can select one or two point conductivity calibration.

1. Rinse the electrode & ATC assembly in distilled water and

immerse them in the standard solution of 1413uS. The

temperature displayed is the solution temperature.

2. Press “Cal” key to initiate calibration. The “CAL” icon will

appear when the main display shows “1415”. Single

Point calibration is now complete. The “MEAS” icon will

appear. The unit is now ready to measure.

[Note: At this moment, the unit can measure 0~2000uS

range of conductivity.]

3. Remove the electrode & ATC assembly from the standard

solution of 1413uS. Rinse them in distilled water and

immerse them in the standard solution of 12.90mS. The

unit will display the temperature of the standard solution

of 12.90mS.

4. Press “Cal” key to initiate calibration. The “CAL” icon will

appear when the main display shows “12.90”. Dual

Points calibration is now complete. The “MEAS” icon will

appear. The unit is now ready to measure.

[Note: At this moment, the unit can measure

0.0~20.00mS range of conductivity. ]

C. Measure

In the “Measure Mode”, dip the meter into the test solution.

Measuring for Conductivity (℃) commences. Press “Mode” key to

select: Conductivity(℃), Conductivity(℉), TDS(℃) and TDS(℉).

[Note: If the “CAL” icon does not appear, during measuring, it

means the unit has not been calibrated. Repeat the calibration

procedure.]

D. Hold Data

1. When the conductivity reading is stable, press “Hold” key

once to lock the reading.

2. Press “Hold” key again to unlock reading and the unit will

return to “Measure Mode”. The unit is now ready for

another measurement.

REPLACE ELECTRODE

1. Unscrew the electrode collar to remove the electrode &

ATC assembly as shown in the right figure.

2. Remove the old electrode from

the electrode collar.

3. Insert a new electrode, make

sure the electrode fit back into

the meter correctly.

4. Screw back the electrode collar.

5. Soak the electrode in distilled water for 10 minutes and

recalibrate the EC 330 following the instructions detailed

in section USING VISIONPLUS EC 330..

REPLACE THE OLD BATTERIES

Replace the battery when the blinking low battery indicator “ ”

appears on the upper left corner of the LCD screen. The instrument

can operate within specifications for approximately 2~3 hours after

low battery indicator appears.

1. Take off the battery cover.

2. Remove all of the old batteries and insert a new set of

batteries ensuring the polarities are correct.

[Note: Calibration of the unit is required after replacement of

batteries.]

ERROR DISPLAYS AND TROUBLESHOOTING

Conductivity

LCD Display

ATC

Display

DISPLAY

Mode

Possible cause(s)

[Action(s)]

"OVER"

Measure

Temperature >99.9°

C range.

[Bring solution to a

lower temperature.]

[Replace electrode

& ATC assembly .]

"OVER"

"udr"

Measure

Temperature <0.0°C

range.

[Bring solution to a

higher temperature.]

[Replace electrode

& ATC assembly .]

"OVER"

60.0 ~ 99.5°C

Measure

Temperature

>60.0°C, over the

temperature

compensation range.

[Bring solution to a

lower temperature.]

"OVER"

0.0 ~ 60.0°C

Measure

[The conductivity

value of the test

solution is beyond

20mS.]

[Replace electrode &

ATC assembly.]

"ERR"

Calibration

a.Temperature

exceed 0 ~ 60.0°C

Temperature

compensation

b. Correction of

slope beyond

50%.

[Bring solution to a

lower temperature.]

[Use a new

standard solution.]

[Replace electrode &

ATC assembly.]

SPECIFICATIONS

Conductivity

Range

Resolution

Accuracy

0 to 20.00 mS/cm

5 uS/cm (40~2000 uS/cm)

±1% F.S.

0.05 mS/cm (2.00 ~ 15.00 mS/cm)

0.10 mS/cm (15.00 ~ 20.00 mS/cm)

TDS

Range

Resolution

Accuracy

0.00 to 10.00 g/L

5 mg/L (20 ~ 1000 mg/L)

±1% F.S.

0.05 g/L (1.00 ~ 7.50 g/L)

0.10 g/L (7.50 ~ 10.00 g/L)

Temperature

Range

Resolution

Accuracy

0.0 to 99.5 °C

32 to 212 °F

0.5 °C

1 °F

±0.5 °C

±1 °F

Conductivity

Temperature compensation

Temperature Coefficient

Reference temperature

AUTO 0.0 °C to 60.0 °C

1.91 %/°C

25 °C

TDS

TDS Constant 0.50

Temperature

Temperature sensor Thermistor, 10 k

at 25 °C

Temperature unit °C and °F

General

Power: LR44 x 4

Battery life: >100 Hours

Ambient temperature range 0.0 to 50.0 °C

Case IP67 water-tight case

Weight 105 g

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