Triplett CD100 Manual de usuario

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User Manual

CD100

Conductivity / TDS / Salinity / Temperature Meter

5 Commonwealth Ave5 Commonwealth Ave

Woburn, MA 01801Woburn, MA 01801

Phone 781-665-1400Phone 781-665-1400

TollToll Free 1-800-517-8431Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

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Introduction

Thank you for selecting the Triplett CD100 Conductivity/Total Dissolved

Solids (TDS) / Salinity meter. With the CD100’s dynamic cell-constant

technology it is possible to measure a wide range of Conductivity, TDS,

and Salinity with the same electrode. Careful use and maintenance

provide years of reliable service.

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Description

METER DESCRIPTION

1. Battery compartment cap

2. LCD Display

3. MODE / HOLD button

4. CAL / RECALL button

5. ON/OFF button

6. Electrode collar

7. Conductivity Electrode

LCD DISPLAY

1. Bar graph reading

2. Measurement Units

3. Main Display

4. RENEW Indicator

5. HOLD Indicator

6. RANGE Calibration

Indicator

7. Low Battery Indicator

8. Temperature Display

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Powering On

The CD100 uses four (4) CR2032 Lithium Ion Batteries (included). If the

batteries are weak, the ‘Low Battery’ indicator appears on the LCD.

Press the ON/OFF key to turn the CD100 on or off. The auto power off

feature shuts the CD100 off automatically after 10 minutes of inactivity to

preserve battery life.

Getting Started

 Remove the cap from the bottom of the CD100 to expose the

conductivity electrodes.

 Before the first use or after storage, rinse the electride in water

and dry.

 For best results, calibrate for conductivity with a standard in the

expected range of the sample. For maximum accuracy calibrate from

low conductivity value standards to high value standards.

 Store dry.

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Measurement Procedure

Sample Preparation:

1. For Conductivity, TDS or Salinity place the test

sample in a sample cup with enough depth (2.5cm

minimum) to cover the electrode. Stir the solution to

remove any air bubbles.

Measurement:

1. Press the ON button. ( and then “SELF CAL” will appear in the

display during the turn-on diagnostics)

2. Depress and hold the MODE/HOLD key to scroll to the desired

measurement mode.

3. Insert the electrode into the sample making sure that the electrodes

are completely submersed.

4. Slowly stir the solution with the electrode to remove air bubbles.

5. The meter will auto-range to the proper range and then display the

reading.

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Changing Measurement Function

The meter can be set to measure Conductivity, TDS or Salinity.

To change the mode:

1. Press and Hold the MODE/HOLD button for 2 seconds and the

display will begin to scroll through the units.

µS (Conductivity); ppm S (Salinity); ppm (TDS); mg/l (TDS);

Note: The “HOLD” function cannot be on when changing the

measurement function. If “HOLD” is displayed in the lower left corner of

the display, briefly press the MODE/HOLD button to turn it off.

2. When the desired units are displayed, release the MODE/HOLD

button.

TDS Compensation Ratio

The TDS value is determined by multiplying a conductivity reading by a

known ratio factor. The meter allows for selecting a conversion ratio in

the range of 0.40 to 1.00. The ratio varies with the application, but is

typically set between 0.50 and 0.70.

Note: The stored ratio will briefly appear in the lower temperature

display when the meter is first turned on, or when changing

measurement function to TDS.

Note: In the Salinity mode the ratio is 0.40 to 0.60 auto.

To change the ratio, while in the TDS measurement mode (ppm or mg/l):

1. Press and release the CAL/RECALL button twice in

succession. The stored ratio will appear in the

display.

2. Press the MODE/HOLD button to increase the ratio value in steps of 0.01.

3. When the desired ratio is displayed, press and

release the CAL/RECALL button to store the

value and return to the normal mode.

4. If no buttons are pressed for 5 seconds, the

meter returns to measure mode.

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Storing Readings

1. Press the MODE/HOLD button to store a reading.

The storage location number will be displayed on

the lower display, while the main display shows

the stored reading. The meter will enter the HOLD

mode and the “HOLD” indicator will appear.

2. Press the MODE/HOLD button again to exit the

HOLD mode and return to normal operation.

3. If more than 25 readings are stored, previously

stored readings (starting with number 1) will be

overwritten.

Recalling Stored Readings

1. Press the CAL/RECALL button and then press the MODE/HOLD

button. A location number (1 through 25) will briefly appear and then

the value stored in that location will appear. The displayed units will

flash, indicating that the storage recall mode is active.

2. The last stored reading will be displayed first. Pressing and releasing

the MODE/HOLD button will scroll through the stored readings one at

a time. The location number is displayed first, followed by the reading

stored in that location.

3. To exit the storage mode, press the CAL/RECALL button and the

meter will return to normal operation, after displaying “End”.

Clear Stored Memory

With the unit on, press and hold ON/OFF for 4 seconds. “CLr” will be

briefly displayed when the memory is cleared.

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Changing Temperature Units

To change the displayed temperature units (oC or oF):

1. With the unit OFF, press and hold down the CAL/RECALL button.

2. With the CAL/RECALL button depressed momentarily press the

ON/OFF button. When “SELF CAL” appears in the display release the

CAL/RECALL button. The unit will power on with temperature

displayed in the new units.

Data Hold Mode

Press the MODE/HOLD button to hold (freeze) a reading in the display.

The meter will enter the HOLD mode and the “HOLD” indicator will

appear.

Note: This also stores the reading.

Press the MODE/HOLD button again to return to normal operation.

Auto Power OFF

The auto power off feature automatically shuts the meter off 10 minutes

after the most recent button press.

Auto Power OFF Disable

To disable the Auto Power Off feature:

1. Turn the unit on.

2. Press CAL/RECALL once (Quickly)

3. Immediately and simultaneously press the MODE/HOLD and ON/OFF

buttons for approximately 2 seconds, until “oFF” is briefly displayed

To disengage this feature, turn the unit off with the ON/OFF button. The

next time the unit is powered up, Auto Power OFF mode will be engaged

again.

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Low Battery Indication

When the batteries become weak the “ ” icon will appear in the

display. Refer to the Maintenance section for battery replacement

information.

Measurement and Display Considerations

If the unit appears to be locked (display frozen). It is possible that the

Data Hold mode has been inadvertently accessed by pressing the

MODE/HOLD button. (“HOLD” will be displayed in the bottom left of the

LCD.) Simply press the MODE/HOLD button again or turn the meter off

and then on.

For maximum accuracy, allow sufficient time for the temperature of the

probe to reach the temperature of the sample before calibrating. This will

be indicated by a stable temperature reading on the display.

Reset Calibration Data

Follow this procedure to clear all calibration data from the meter.

Resetting the calibration data may be necessary when new calibration

solutions are used or accuracy of measurements is in question.

1. Turn off the meter.

2. Press and Hold the Cal/Recall and Mode/Hold buttons.

3. Momentarily press the On/Off button, as soon as the display comes

on, release all 3 buttons.

4. The display will show “dFLt rSt” (default reset) and all of the

calibration data will be erased. If “dFLt rSt” does not appear, retry the

procedure.

5. Proceed to the calibration routine for Conductivity.

Calibration - Conductivity

Meter accuracy verification should be performed on a periodic basis.

Once per month is the recommended cycle for normal use. If calibration

is required, a conductivity standardizing solution must be obtained. The

meter can be calibrated in any or all of the three ranges. Standardizing

solutions of 84µS/cm, 1413µS/cm or 12.88mS/cm (12,880µS/cm) are

used for the automatic calibration recognition procedure. No other

calibration values are permitted.

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Calibration is always done in conductivity mode. Since salinity and TDS

values are calculated from conductivity values, this procedure also

calibrates the salinity and TDS ranges.

Fill a sample cup with the standardizing solution.

1. Turn the meter ON and insert the electrode into the solution. Tap or

move the electrode in the sample to dislodge any air bubbles.

2. Press and hold the CAL/RECALL button (approximately 2

seconds) until “CAL” appears in the lower (temp) display. The main

display will start flashing.

3. The meter will automatically recognize and calibrate to the

standardizing solution. The display will briefly indicate “SA”, End

and then return to the measurement mode after a calibration.

4. Note: The “SA” will not appear if the calibration fails.

5. The “range calibrated” symbol will appear in the display for each

range that is calibrated during that power on cycle.

Low range, 84µS/cm

Medium range, 1413µS/cm

High range, 12.88mS/cm (12,880µS/cm)

Note: Each time the calibration mode is entered all calibration symbols on

the display are cleared, but only the calibration data for the currently

calibrated range is replaced. The other two ranges keep the existing

calibration data, just the symbols are removed. Calibration of all three

ranges must be performed during one power on period for all three range

calibration symbols to appear.

See Reset Calibration Data to clear all calibration data from the meter.

Note: The meter allows for a 1, 2 or 3 point calibration. If calibration is

done for more than one point the lowest value standard should be done

first to obtain the best accuracy.

Considerations and Techniques

Do not touch the inner surfaces of the conductivity electrodes. Touching

the surface of the platinized electodes may damage and reduce the life

of the probe.

Store the electrode dry, in the storage cap.

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