USER GUIDE Light Meter SD Card real-time datalogger Model SDL400
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.
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.
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.
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. 2. 3. 4. 5. Press and hold the SET button for at least 1.5 seconds to access the Setup menu.
Enabling/Disabling the Auto Power OFF Feature 1. 2. 3. 4. Access the PoFF parameter as described in the Accessing Setup Mode section above. 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. Press ENTER to confirm setting. Press and hold the SET button for at least 1.
Set the Temperature Units of Measure (C or F) 1. 2. 3. 4. Access the t-CF parameter as described in the Accessing Setup Mode section above. Use the arrow buttons to select the desired unit of measure. Press ENTER to confirm setting. 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. 2. 3. 4.
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.
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.
Spreadsheet data example RS-232/USB PC Interface The optional 407001A software kit (software and cable) allows streaming of data to a PC via the RS232 Output jack. 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.
Specifications General Specifications Display Backlit LCD; LCD size: 52 x 38mm (2 x 1.5”) Status indicators Over-range (----) and low battery Sensor types Light: Supplied color corrected, domed light intensity sensor (meets C.I.E.); Temperature: Thermocouple (J or K) temperature probe Temperature compensation Automatic compensation for thermocouple temperature measurements Measurement Units Temperature: °C, °F; Light: LUX, Foot candles Zero Adjust Light function only. Front panel push-button.
Electrical Specifications (ambient temperature 23°C ± 5°C) Light meter Measurement LUX (auto range) Foot-candles (auto range) Range Range Actual Display for each range 2,000LUX 0 to 1,999 LUX 20,000 LUX 1,800 to 19,990 LUX 100,000 LUX 18,000 to 99,900 LUX 200Ft-cd 0 to 186.0 Ft-cd 2,000 Ft-cd 167.0 to 1,860.0 Ft-cd 10,000 Ft-cd 1,670.0 to 9,290.7 Ft-cd Resolution Accuracy 2,000 LUX 1 LUX 20,000 LUX 10 LUX 100,000 LUX 100 LUX 200 Ft-cd 0.
