Extech Instruments SDL400-NIST Manual de usuario

USER GUIDE

Light Meter

SD Card real-time datalogger

Model SDL400

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Introduction

Congratulations on your purchase of the Extech SDL400 Light Meter. This meter displays and

stores light meter readings in three ranges: 2,000 / 20,000 / 100,000 LUX or Foot candles from the

supplied domed light sensor. The meter automatically ranges light meter measurements and the

light sensor spectrum meets C.I.E.

This meter also displays and logs temperature readings from a connected Type J or Type K

thermocouple.

Logged data readings are stored on an SD card for transfer to a PC. This device is shipped fully

tested and calibrated and, with proper use, will provide years of reliable service. Please visit the

Extech Instruments website (www.extech.com) to check for the latest version of this User Guide.

Safety

International Safety Symbols

This symbol, adjacent to another symbol or terminal, indicates the user must refer to the

manual for further information.

Meter Description

1. Temperature (thermocouple) input jack

2. Light Meter Sensor input plug

3. Measurement reading

4. Temperature units of measure

5. HOLD and Backlight key

6. MAX-MIN key

7. SET and Clock key

8. PC interface jack

9. Reset button

10. Power Adaptor jack

11. SD card slot

12. ENTER and LOG key

13. Down arrow ▼/ FUNCTION / ZERO key

14. Up arrow ▲/ UNIT / ZERO key

15. Power ON-OFF key

16. Thermocouple type or Light measurement unit of measure

17. Light Sensor dome

Notes:

Items 8, 9, and 10 are located behind the snap-off compartment cover on meter’s right side.

Battery compartment, tilt stand, and tripod mount are located on the rear of the instrument.

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Getting Started

Power ON-OFF

Power the meter by pressing and holding the power button for at least 1.5 seconds.

Press and hold the power button for at least 1.5 seconds to power OFF the meter.

This meter is powered by six (6) 1.5VDC ‘AA’ batteries or by optional AC adaptor. If the meter

will not switch ON please check that fresh batteries are installed in the rear battery compartment

or, in the case of the AC adaptor, check that the adaptor is connected correctly to the meter and

to an AC source.

Display Backlight

To turn the display backlight ON or OFF, press and hold the backlight button for at least 1.5

seconds. The meter will beep when switching the backlight ON or OFF unless the beeper is

disabled as described in the Setup Mode section of this user guide.

Light Meter Sensor Connection

The supplied light sensor is connected to the meter via the DIN jack at the top right of the meter.

When taking measurements snap off the light sensor’s protective cover and then replace the cover

when finished.

Light Meter Units of Measure

The currently selected unit of measure is shown to the left of the light measurement reading on the

meter’s LCD. To change the unit of measure, press and hold the UNIT button until the desired unit

of measure appears and then release the UNIT button. The available light measurement units are

LUX and FOOT CANDLE (ft-cd).

Thermocouple Temperature Sensor Connection

A type K or J thermocouple temperature sensor can be connected via the sub-miniature

thermocouple jack at the top left of the meter. The display icon for the type of thermocouple

selected (J or K) is shown on the meter’s LCD to the left of the temperature measurement. To

change the type, use the Setup Mode.

Temperature Measurement Units of Measure

The currently selected unit of measure is shown below the temperature measurement reading on

the meter’s LCD. To change the unit of measure, press and hold the UNIT button until the desired

unit of measure appears and then release the UNIT button. The available temperature

measurement units are °C and °F.

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Measurements

Light Meter Measurements

1. Connect the light sensor to the top of the meter as previously described.

2. Power on the meter by holding the power button for at least 1.5 seconds.

3. Select the Light Measurement mode by pressing and holding the FUNCTION button for at least

1.5 seconds (if necessary). The ‘LIgHt’ icon indicates the Light Meter mode.

4. Select the desired unit of measure LUX or Foot candles by pressing and holding the UNIT

button for at least 1.5 seconds (if necessary).

5. Place the sensor on a surface, or hold in hand, with the domed area facing the light source

under test. The light sensor is dome shaped to accommodate light reaching it from various

angles.

6. Read the measurement on the meter’s LCD.

7. This instrument measures light intensity (illuminance) in LUX or Foot candle measurement units.

ZERO Adjustment (Light Measurement readings only)

To zero the light meter display, simply press and hold both arrow keys (▼▲) for at least 1.5

seconds. This is typically done with the protective sensor cover installed to ensure that a complete

absence of light displays a zero reading. This zero function can also be used as a relative, or offset,

function if the value is within 20 Lux of zero, but remember to re-zero the meter with the protective

cap on after such use.

Temperature Measurements

1. Connect the temperature sensor to the top of the meter as previously described.

2. Power on the meter by holding the power button for at least 1.5 seconds.

3. Select the Temperature Measurement mode by pressing and holding the FUNCTION button for

at least 1.5 seconds (if necessary). The ‘tP’ icon indicates the temperature mode of operation.

4. Select the desired Thermocouple Type (K or J) in the Setup Mode.

5. Select the desired unit of measure (C or F) in the Setup Mode.

6. Hold the thermocouple in the air in the area under test.

7. Read the temperature measurement on the meter’s LCD.

Important Safety Note on Thermocouple Ratings

The temperature range of this meter extends up to 1300°C (2372°F); however the range of

thermocouple probes vary greatly; be sure to select a probe rated for the expected temperature

measurement ranges.

Data Hold

To freeze a displayed reading on the LCD, momentarily press the HOLD button (the HOLD display

icon will appear above the held reading). To release the held reading press the HOLD button again.

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Setup Mode

Basic settings at a glance

To view the current configuration of the meter with regard to time, date, and datalogging sampling

rate press the SET button momentarily. The meter will now display the configuration in quick

succession. If the information is missed on the first try, simply press the SET button again until all of

the information is noted.

Accessing the Setup mode

1. Press and hold the SET button for at least 1.5 seconds to access the Setup menu.

2. Press the SET button momentarily to step through the available parameters. The parameter

type is shown on the bottom of the LCD and the current selection for that type is shown above

it.

3. When a parameter is displayed that is to be changed, use the arrow keys to change the

setting. Press the ENTER button to confirm a change.

4. Press and hold the SET button for at least 1.5 seconds to exit the Setup mode. Note that the

meter automatically switches out of the Setup mode if no key is pressed within 7 seconds.

The available Setup parameters are listed below. Additional detailed information is provided

below this list:

dAtE

Set the clock (Year/Month/Date; Hours/Minutes/Seconds)

SP-t

Set the datalogger sampling rate (Hours/Minutes/Seconds)

PoFF

Automatic power-off management (Enable or disable the auto-power off function)

bEEP

Set the beeper sound ON/OFF

dEC

Set the numerical format; USA (decimal: 20.00) or European (comma: 20,00)

Sd F

Format the SD memory card

t-CF

Units of measure selection for temperature readings (C or F)

tYPE

Select the Thermocouple type (K or J)

Setting the Clock Time

1. Access the dAtE parameter as described in the Accessing Setup Mode section above.

2. Use the arrow keys to change a value.

3. Use the ENTER button to step through the selections.

4. Press and hold the SET button for at least 1.5 seconds to exit to the normal operation mode (or

simply wait 7 seconds for the meter to automatically switch to the normal operating mode).

5. The clock will keep accurate time even when the meter is switched off. However, if the battery

expires the clock will have to be reset after fresh batteries are installed.

Setting the Datalogger Sampling Time (Rate)

1. Access the SP-t parameter as described in the Accessing Setup Mode section above.

2. The sampling rate can be set to ‘0’ seconds (for manual logging) or

1, 2, 5, 10, 30, 60, 120,

300, 600, 1800, 3600 seconds for auto logging.

Use the arrow keys to select the sampling rate.

Press the ENTER button to confirm the entry.

4. Press and hold the SET button for at least 1.5 seconds to exit to the normal operation mode (or

simply wait 7 seconds for the meter to automatically switch to the normal operating mode).

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Enabling/Disabling the Auto Power OFF Feature

1. Access the PoFF parameter as described in the Accessing Setup Mode section above.

2. Use the arrow buttons to select ON (enable) or OFF (disable). With the Auto Power OFF

feature enabled, the meter will automatically switch OFF after 5 minutes of inactivity.

3. Press ENTER to confirm setting.

4. Press and hold the SET button for at least 1.5 seconds to exit to the normal operation mode (or

simply wait 7 seconds for the meter to automatically switch to the normal operating mode).

Set the Beeper Sound ON or OFF

1. Access the bEEP parameter as described in the Accessing Setup Mode section above.

2. Use the arrow buttons to select ON (enable) or OFF (disable).

3. Press ENTER to confirm setting.

4. Press and hold the SET button for at least 1.5 seconds to exit to the normal operation mode (or

simply wait 7 seconds for the meter to automatically switch to the normal operating mode).

Numerical Format (comma or decimal)

European and USA numerical formats differ. The meter defaults to USA mode where a decimal

point is used to separate units from tenths, i.e. 20.00; The European format uses a comma, i.e.

20,00 to separate units from tenths. To change this setting:

1. Access the dEC parameter as described in the Accessing Setup Mode section above.

2. Use the arrow buttons to select USA or EUro.

3. Press ENTER to confirm setting.

4. Press and hold the SET button for at least 1.5 seconds to exit to the normal operation mode (or

simply wait 7 seconds for the meter to automatically switch to the normal operating mode).

SD Card FORMATTING

1. Access the Sd-F parameter as described in the Accessing Setup Mode section above.

2. Use the arrow buttons to select YES to format the card (select NO to abort). Note that all data

on the card will be lost if formatting is attempted.

3. Press ENTER to confirm selection.

4. Press ENTER again to re-confirm.

5. The meter will automatically return to the normal operating mode when formatting is complete.

If not, press and hold the SET button for at least 1.5 seconds to exit to the normal operation

mode.

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Set the Temperature Units of Measure (C or F)

1. Access the t-CF parameter as described in the Accessing Setup Mode section above.

2. Use the arrow buttons to select the desired unit of measure.

3. Press ENTER to confirm setting.

4. Press and hold the SET button for at least 1.5 seconds to exit to the normal operation mode (or

simply wait 7 seconds for the meter to automatically switch to the normal operating mode).

Set the Thermocouple Type (K or J)

1. Access the tYPE parameter as described in the Accessing Setup Mode section above.

2. Use the arrow buttons to select the desired sensor type.

3. Press ENTER to confirm setting.

4. Press and hold the SET button for at least 1.5 seconds to exit to the normal operation mode.

System Reset

If the meter’s keys become inoperable or if the display freezes the Reset button can be used to

reset the instrument.

Use a paper clip or similar item to momentarily press the reset button located on the lower right

side of the instrument under the snap-off compartment cover.

After pressing the Reset button, switch the instrument ON by pressing and holding the POWER

key for at least 1.5 seconds. If using the power adaptor unplug the adaptor and then plug it back

in again to power the meter.

Max-Min Reading Record and Recall

For a given measurement session, this meter can record the highest (MAX) and the lowest (MIN)

readings for later recall.

1. Press the MAX-MIN button momentarily to access this mode of operation (REC icon appears)

2. The meter is now recording the MAX and MIN readings.

3. Press the MAX-MIN button again to view the current MAX readings (MAX icon appears). The

readings on the display are now the highest readings encountered since the REC icon was

switched on (when the MAX-MIN button was first pressed).

4. Press the MAX-MIN button again to view the current MIN readings (MIN icon appears). The

readings on the display are now the lowest readings encountered since the REC icon was

switched on (when the MAX-MIN button was first pressed).

5. To exit the MAX-MIN mode, press and hold the MAX-MIN button for at least 1.5 seconds. The

meter will beep, the REC-MAX-MIN icons will switch off, the MAX-MIN memory will clear, and

the meter will return to the normal operating mode.

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Datalogging and PC Interface

Types of Data Recording

Manual Datalogging: Manually log up to 99 readings onto an SD card via push-button press.

Automatic Datalogging: Automatically log data onto an SD memory card where the number of

data points is virtually limited only by the card size. Readings are logged at a rate specified by

the user.

SD Card Information

Insert an SD card (from 1G size up to 16G) into the SD card slot at the bottom of the meter. The

card must be inserted with the front of the card (label side) facing toward the rear of the meter.

If the SD card is being used for the first time it is recommended that the card be formatted and

the logger’s clock set to allow for accurate date/time stamping during datalogging sessions.

Refer to the Setup Mode section for SD card formatting and time/date setting instructions.

European and USA numerical formats differ. The data on the SD card can be formatted for

either format. The meter defaults to USA mode where a decimal point is used to separate units

from tenths, i.e. 20.00. The European format uses a comma, i.e. 20,00. To change this setting,

refer to the Setup Mode section.

Manual Datalogging

In the manual mode the user presses the LOG button to manually log a reading onto the SD card.

1. Set the sampling rate to ‘0’ seconds as described in the Setup Mode section.

2. Press and hold the LOG button for at least 1.5 seconds and the lower portion of the display will

show P-n(n= memory position number 1-99).

3. Momentarily press the LOG button to store a reading. The REC icon will flash each time a data

point is stored.

4. Use the ▲and ▼buttons to select one of the 99 data memory positions in which to record.

5. To exit the manual datalogging mode, press and hold the LOG button for at least 1.5 seconds.

The Pnicon will switch off.

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Automatic Datalogging

In automatic datalogging mode the meter takes and stores a reading at a user-specified sampling

rate onto an SD memory card. The meter defaults to a sampling rate of one second. To change the

sampling rate, refer to the Setup Mode section (the sampling rate cannot be ‘0’ for automatic

datalogging):

1. Select the sampling rate in the Setup Mode (refer to Setup Mode section) to a value other than

zero.

2. Press and hold the LOG button for at least 1.5 seconds. The meter will flash the REC icon at

the selected sampling rate indicating that readings are now being automatically recorded to the

SD card. Note that if the battery is low, the meter will flash the BAT icon and datalogging will

not commence. Replace the batteries at this point (see Battery Replacement section of this

guide)

3. If a card is not inserted or if the card is defective, the meter will display SCAN SD indefinitely.

In this case, switch the meter OFF and try again with a valid SD card.

4. Pause the datalogger by pressing the LOG button momentarily. The REC icon will stop

flashing and the sample rate will display for a short time. To resume logging simply press the

LOG button again momentarily.

5. To terminate the datalogging session press and hold the LOG button for at least 1.5 seconds.

6. When an SD card is used for the first time a folder is created on the card and named LXB01.

Up to 99 spreadsheet documents (each with 30,000 readings) can be stored in this folder.

7. When datalogging begins a new spreadsheet document named LXB01001.xls is created on

the SD card in the LXB01 folder. The data recorded will be placed in the LXB01001.xls

document until 30,000 readings are reached.

8. If the measurement session exceeds 30,000 readings, a new document will be created

(LXB01002.xls) where another 30,000 readings can be stored. This method continues for up to

99 documents, after which another folder is created (LXB02) where another 99 spreadsheet

documents can be stored. This process continues in this same fashion with folders LXB03

through LXB10 (last allowable folder).

SD Data Card to PC Data Transfer

1. Complete a datalogging session as detailed above in the previous sections. Hint: For the first

few tests, simply record a small amount of test data. This is to ensure that the datalogging

process is well understood before committing to critical, large scale datalogging.

2. With the meter switched OFF, remove the SD Card.

3. Plug the SD Card directly into a PC SD card reader. If the PC does not have an SD card slot,

use an SD card adaptor (available at most outlets where computer accessories are sold).

4. Power on the PC and run a spreadsheet software program. Open the saved documents in the

spreadsheet software program (see example spreadsheet data screen below).

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Spreadsheet data example

RS-232/USB PC Interface

For streaming of data to a PC via the RS232 Output jack, the optional 407001-USB kit (RS232 to

USB cable and driver CD) along with the 407001 software (available free at

www.extech.com/sdl400) are required.

AC Power Adaptor

This meter is normally powered by six (6) 1.5V ‘AA’ batteries. An optional 9V power adaptor is

available. When the adaptor is used, the meter is permanently powered on and the power button

will be disabled.

Battery Replacement and Disposal

When the low battery icon appears on the LCD, the batteries must be replaced. Several hours of

accurate readings are still possible in this condition; however batteries should be replaced as soon

as possible. Note that the Datalogger will not run with the low battery symbol showing.

Remove the two (2) Phillips screws from the rear of the meter (directly above the top of the tilt

stand).

Remove and safely place the battery compartment and screws where they will not be damaged

or lost.

Replace the six (6) 1.5V ‘AA’ batteries observing polarity.

Replace the battery compartment cover with the two (2) Phillips screws.

All EU users are legally bound by the Battery Ordinance to return all used batteries to

community collection points or wherever batteries / accumulators are sold!

Disposal in household trash or refuse is prohibited!

Disposal: Follow the valid legal stipulations in respect of the disposal of the device at the

end of its lifecycle

Other Battery Safety Reminders

Never dispose of batteries in a fire. Batteries may explode or leak.

Never mix battery types. Always install new batteries of the same type.

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