DLM112SD Man - General Tools And Instruments
Contents
1. GENERAL DLM112SD USER S MANUAL LIGHT METER WITH DATALOGGING SD CARD Please read this manual carefully and thoroughly before using this product TABLE OF CONTENTS Introduction 2 coiere rre 3 Key Features 4 Operating Instructions 4 11 What s in the case 4 5 lg GG 6 8 Normal Operation 8 9 Holding and Storing Measurements 9 Automatic vs Manual Datalogging 9 10 Transferring Data from the SD Card to 10 11 Specifications 12 Maintenance amp Troubleshooting Tips 13 Optional 50 13 Warranty Information 13 Return for Repair Policy 14 INTRODUCTION Thank you for purchasing General Tools amp Instruments DLM112SD UV Light Meter with Datalogging SD Card Please read this user s manual carefully and thoroughly before using the instrument The DLM112SD is a general purpose handheld instrument suitable for measuring the intensity of light in commercial industrial and consumer settings Applications include photography videography construction engineering and surveillance This light meter measures light intensity using either of two units lux or foot candles The lux is the standard international unit of illuminance or2. 1 2 5 10 30 60 120 300 600 1800 and 3600 seconds 0 seconds to 1 hour 10 Format the SD card Once the sampling time has been set and stored the word no or yES will be displayed over the term Sd F Press the SET W button to make a selection Choose yES whenever a new SD card is being used or when a used card is being repurposed from use with another SD card instrument or a camera for example and all data on it is to be erased Choose no to preserve any data on a card previously used with this instrument e If you choose yES after you press the REC ENTER button the instrument will prompt you to confirm that decision by displaying the term Ent below yES and sounding three beeps To confirm that you want to begin the erasure formatting procedure press the REC ENTER Ent will then flash several times and the instrument will sound another three beeps to confirm that the SD card has been erased and formatted Once the SD card has been formatted or not the display will then either return to the first of the six steps in the setup sequence setting the current date and time or show the term ESC If ESC appears press the POWER ESC button to exit the setup procedure and enter normal operating mode NORMAL OPERATION The DLM112SD can measure and store two different kinds of values e The intensity of light in lux or footcandles The unit lux is analogous to the radi
3. BLESHOOTING TIPS Keep the light probe clean and its sensor under the protective cap when not in use When the icon dX appears in the left corner of the display it s time to replace the six batteries that power the instrument although measurements will remain valid for several hours after the low battery indicator first appears Replacing the batteries requires removing the two screws that hold the battery compartment cover in place as explained earlier After inserting fresh batteries in the correct orientation tighten the screws to secure the cover If the meter freezes like a computer and buttons become unresponsive try resetting the instrument by pushing the RESET button on its right side callout 1 11 of Fig 1 with the end of a paper clip Remove the batteries when storing this product for an extended period of time Do not drop or disassemble the instrument or immerse it in water REPLACEMENT PARTS amp OPTIONAL ACCESSORIES e Type K or Type J thermocouple optional e 9 VDC adapter for 110VAC power supply optional e Spare light probe WARRANTY INFORMATION General Tools amp Instruments General s DLM112SD UV Light Meter with Datalogging SD Card is warranted to the original purchaser to be free from defects in material and workmanship Subject to certain restrictions General will repair or replace this instrument if after examination the company determines it to be defective in material or workman
4. ICATIONS Embedded microcontroller Custom one chip LSI device Display type Liquid crystal with green backlight Display size 2 05 x 1 5 in 52 x 38 mm Full scale ranges 0 to 1 999 lux 1 800 to 19 990 lux automatically switched 18 000 to 99 900 lux 0 to 186 ft cd 167 to 1 960 ft cd 1 670 to 9 290 7 ft cd Measurement accuracy 4 of full scale reading 2 digits for all lux readings and ft cd readings at 200 ft cd full scale f s 4 of f s reading 2 ft cd at 2 000 ft cd f s 4 of f s reading 20 ft cd at 20 000 ft cd f s Measurement resolution 1 lux at 2 000 lux f s 10 lux at 20 000 lux f s 100 lux at 100 000 lux f s 0 1 ft cd at 200 ft cd f s 1 ft cd at 2 000 ft cd f s 10 ft cd at 10 000 ft cd f s Stored readings Maximum minimum Datalogging sampling times 1 second to 1 hour automatic mode SD card capacity 1 GB to 16 GB Settable parameters Date time auto power off beep sound temperature unit oF or oC sampling time thermocouple type K or J decimal point or comma Operating temperature 32 to 1220F 0 to 500C Operating relative humidity 0 to 85 Power source 6 Alkaline AA batteries or optional 9 VDC AC adapter Power consumption 6 5 mADC normal operation with backlight off and SD card not saving data 30 mADC with backlight on Dimensions of meter 6 97 x 2 68 x 1 77 in 177 x 68 x 45 mm Weight of meter 1 08 Ib 489g MAINTENANCE amp TROU
5. e no for disable is displayed Press the REC ENTER button to store the selection If enabled the power off function shuts off the DLM112SD after a period of inactivity of ten minutes Enable or disable the beeper Once the desired power management function has been set and stored the display will show the word yES over the word DEEP Press the SET W button until the desired setting yES or no is displayed and then press the REC ENTER button to store the selection 7 Select the thermocouple type Once the beeper has been enabled or disabled the display will show the word Set over the word tYPE Press the SET W button until the desired setting K or J for a Type or Type J thermocouple appears on the right side of the display Then press the REC ENTER button to store the selection 8 Select the temperature unit Once the thermocouple type has been set and stored the display will show the term t CF Press the SET W button until the desired setting F or C for Fahrenheit or Celsius units appears on the right side of the display Then press the REC ENTER button to store the selection 9 Set the datalogging sampling time Once the temperature unit has been set and stored the display will show a value above the letters SP t Press the SET button or the LOGGER A button to decrease or increase the value until the desired sampling time appears above SP t The options are 0
6. et New York NY 10013 3567 PHONE 212 431 6100 FAX 212 431 6499 TOLL FREE 800 697 8665 e mail sales generaltools com www generaltools com DLM112SD User s Manual Specifications subject to change without notice 2010 GENERAL TOOLS amp INSTRUMENTS NOTICE WE ARE NOT RESPONSIBLE FOR TYPOGRAPHICAL ERRORS MAN DLM112SD 11 26 10
7. hanges the term REC from flashing to constant Pressing the LOGGER A button again resumes automatic datalogging 9 9 To end automatic datalogging press the REC ENTER button and hold it for at least two seconds This action causes the REC message to disappear 10 To log data manually set the sampling time to zero Step 9 of the setup procedure Then press the REC ENTER button once The display will show the term REC on the top line a value in the middle and below it the letter P on the left and a number from 1 to 99 on the same line to the right The number indicates the position on the SD card that will be used to store manually logged data Now press the LOGGER A button This will cause the beeper to sound and the term LOGGER to briefly appear at the upper right of the display As in automatic datalogging mode in this mode the instrument is storing measurements and their time stamps on the SD card In manual datalogging mode however measurements are being stored continuously with a sampling time of zero and their locations on the card can be changed 11 To change the storage location of manually logged data press the SET WV button once this causes the to disappear from the left side of the display and the value on its line to begin flashing Once the flashing begins you can use the SET W and LOGGER A buttons to change the flashing value to any number between 1 and 99 Once you have chosen
8. how much luminous flux is spread over a given area One can think of luminous flux as a measure of the total amount of visible light present and illuminance as a measure of the intensity of illumination on a surface A given amount of light will illuminate a surface more dimly if it is spread over a larger area so illuminance is inversely proportional to area The standard international unit of luminous flux is the lumen and one lux is equal to one lumen m2 For perspective on lux readings from the natural world consider that a moonless clear night sky has an illuminance of about 0 002 lux while direct sunlight has an illuminance of 30 000 to 130 000 lux The footcandle or lumen per square foot is a non standard unit of illuminance Like the Btu it is mainly in common use only in the U S particularly in construction related engineering and in building codes Because lux and footcandles are different units of the same quantity it is perfectly valid to convert footcandles to lux and vice versa One footcandle ft cd 10 764 lux The DLM112SD has the performance and features needed to satisfy the most demanding aspects of the above applications It also has the ability to measure surface temperature using an optional Type K of Type thermocouple A light probe comes standard with the instrument Because it is microprocessor based the DLM112SD can make full use of the portability reliability and large storage capacities that SD me
9. ks on the inside of the compartment as a guide Replace the cover by replacing the two screws 2 Install an SD card To prepare for setup also install the supplied 2 GB SD memory card or another card with a capacity from 1 GB to 16 GB in the socket on the bottom of the DLM112SD callout 1 9 When installing the card make sure its gold contacts are facing front and push the card into the socket until you hear a click To remove the card push it in until you hear a click and the card pops out Now power on the instrument by pressing the POWER ESC button callout 1 2 to generate a short beep To power off the DLM112SD press the POWER ESC button and hold it until the instrument responds with a long beep When the DLM112SD powers on a Series of transient startup screens will briefly appear Once the display has stabilized perform the following series of eight setup steps in the order presented 3 Set the date and time Press the SET W button callout 1 5 and hold it for at least five seconds until the word dAtE appears in the center of the display along with the flashing value 00 00 00 at the lower left above yy mm dd If you press buttons too slowly in setup mode the screen will revert to the normal display To return to the setup sequence press and hold the SET W button again To move ahead to the next field in the sequence or to the next parameter press the FUNC HOLD NEXT button callout 1 3 First set the cur
10. lude Type K and Type J thermocouples and a 9VDC adapter for a 110V power supply See the Replacement Parts amp Optional Accessories section of this manual for more details Figure 1 shows all of the controls and indicators on the front back top bottom and right side of the DLM112SD It also shows at right the main components of the supplied light probe Familiarize yourself with their positions and functions before moving on to the setup procedure Fig 1 BOTTOM 1 1 Liquid crystal display 1 11 RESET Button 1 2 POWER ESC button 1 12 Socket for 9VDC AC adapter 1 3 FUNC HOLD NEXT button 1 13 Battery compartment cover 1 4 REC ENTER button 1 14 Battery compartment cover 1 5 SET W button ares 1 6 LOGGER A button ITS Kickstand 1 7 Socket for light probe 1 16 Tripod attachment nut 1 8 Socket for Type K or J 1 17 Light probe plug thermocouple temperature probe 1 18 Light sensor housing 1 9 SD card socket 1 19 Light sensor 1 10 RS232 output jack 1 20 Light sensor cap The DLM112SD s controls and indicators and other physical features SETUP 1 Choose the power source Before using the DLM112SD be sure it is powered by fresh batteries or an optional 9VDC AC adapter plugged into the bottom jack on its right side callout 1 12 To remove the battery compartment cover remove the two screws holding it in place callout 1 14 Then install six AA batteries in the correct orientation using the polarity mar
11. mory cards offer Measurements of light intensity or temperature can be made automatically at any of 11 sampling rates between one second and one hour After time stamping and storing the measurements on an SD card plugged into the instrument a process called datalogging the user can remove the card and transfer the measurements to laptop or desktop computer either directly or via a USB card reader The DLM112SD has a backlit 2 1 2 in diagonal display and is powered by six AA Alkaline batteries or an optional 9 VDC AC adapter KEY FEATURES e Includes light probe Measures light intensity within three automatically switched full scale ranges 2 000 lux 20 000 lux and 100 000 lux 200 ft cd 2 000 ft cd and 10 000 ft cd e Selectable lux or foot candle unit Displays maximum and minimum readings Performs real time automatic datalogging at sampling time settable from 1 second to 1 hour Also supports manual logging and changing of card storage location Accepts SD memory cards of up to 16 GB capacity Big 2 5 in diagonal front panel green backlit LCD is easy to read Auto power off function Powered by six AA batteries or optional 9V AC DC adapter OPERATING INSTRUCTIONS WHAT S IN THE CASE The DLM112SD comes fully assembled in a carrying case along with a light probe with a protective cover a 2 GB SD memory card and this user s manual Optional accessories available from General Tools amp Instruments inc
12. ometric unit mW cm2 but with the power at each wavelength weighted according to the luminosity function a standardized model of human visual brightness perception One footcandle 10 764 lux e Temperature in oF or oC as sensed by a Type K or Type J thermocouple Pressing and holding the FUNC HOLD NEXT button will bring up in order two blank five digit displays above the terms LIgHt and tP for temperature Each display also automatically shows the correct unit for the parameter 1 To choose the measurement function release the FUNC HOLD NEXT button when the desired parameter appears This becomes the instrument s default measurement function until you change it 2 To measure the intensity of light plug the light probe with its sensor cap on into the socket at the top of the DLM112SD callout 1 7 and use the FUNC HOLD NEXT button to select light measurement mode If the display shows a value other than zero press the LOGGER A button and hold it for at least three seconds until you hear a beep Then remove the cap from the probe Holding the sensor housing point the sensor directly at the light source whose intensity you wish to measure The display will indicate the intensity in units of lux To change the unit of measurement to footcandles Ft cd press the REC ENTER button The last unit selected becomes the default unit 3 To measure temperature first make sure that the light probe is not plugged into the ins
13. rent year by pressing the SET W or LOGGER button repeatedly until the correct value appears above yy Press the REC ENTER button to store the setting The next screen that appears will have the value above mm flashing Use the SET W or LOGGER A button to navigate to the current month and press the REC ENTER button to store the setting When the next screen flashes the value above dd again use the SET W or LOGGER A button to navigate to the current day and press the REC ENTER button to store the setting Once you have set the date the display will prompt you to set the hour minute and second of the current time Again use the SET W or LOGGER A buttons to navigate to the correct values and the REC ENTER button to store the settings 4 Choose a decimal point or comma to represent the decimal division between integers and fractions for example American style 20 88 vs European style 20 88 Once you have finished setting the time the display will show the word above the phrase Press the SET W button to make bASIC American style or Euro appear in the upper display as desired Press the REC ENTER button to store the selection 5 Enable or disable auto power off Once the format of decimal divisions has been set and stored the display will show the word yES over the term PoFF Press the SET W button until the desired automatic power off management scheme yES for enabl
14. ship for a period of one year This warranty does not apply to damages that General determines to be from an attempted repair by non authorized personnel or misuse alterations normal wear and tear or accidental damage The defective unit must be returned to General Tools amp Instruments or to a General authorized service center freight prepaid and insured Acceptance of the exclusive repair and replacement remedies described herein is a condition of the contract for purchase of this product In no event shall General be liable for any incidental special consequential or punitive damages or for any cost attorneys fees expenses or losses alleged to be a consequence of any damage due to failure of or defect in any product including but not limited to any claims for loss of profits 13 RETURN FOR REPAIR POLICY Every effort has been made to provide you with a reliable product of superior quality However in the event your instrument requires repair please contact our Customer Service to obtain an RGA Return Goods Authorization number before forwarding the unit via prepaid freight to the attention of our Service Center at this address General Tools amp Instruments 80 White Street New York NY 10013 212 431 6100 Remember to include a copy of your proof of purchase your return address and your phone number and or e mail address NOTES Specialty Tools amp Instruments GENERAL TOOLS amp INSTRUMENTS 80 White Stre
15. the storage location press the REC ENTER button to save the setting This causes the value to stop flashing and the to return 12 To end manual datalogging press the REC ENTER button and hold it for at least three seconds This action causes the message to disappear from the top line of the display TRANSFERRING DATA FROM THE SD CARD TO A COMPUTER After automatic or manual datalogging of measurements remove the SD card from the DLM112SD and plug it into your computer either directly if it has an SD card slot or through an SD card reader Because the files containing time stamped data logs have the file extension xls they open in Microsoft s Excel application Figures 2 and 3 show two kinds of Excel presentations a data only screen and a graphics only screen MS f Place G D G H I J K Time Value Unit Value Unit 15 14 54 663 LUX 15 14 55 666 LUX 15 14 56 663 LUX 15 14 57 663 LUX 15 14 58 666 LUX 15 14 59 659 LUX 15 15 00 664 LUX 15 15 01 664 LUX 15 15 02 664 LUX 15 15 03 664 LUX 15 15 04 664 LUX 15 15 05 667 LUX 15 15 06 674 LUX 15 15 07 674 LUX 15 15 08 674 LUX 15 15 09 674 LUX 15 15 10 155 LUX 15 15 11 1038 LUX 15 15 12 2030 LUX 15 15 13 1250 LUX 15 15 14 1068 LUX 15 15 15 874 LUX 15 15 16 1007 LUX Fig 2 Typical Excel data only screen 2500 2000 1500 1000 arias 500 Fig 3 Typical Excel graphics only screen 11 SPECIF
16. the top of the display Pressing the REC ENTER button again briefly will make the term MAX appear to the right of REC and switch the display to the maximum value stored in memory during the last recording session Pressing the REC ENTER button again briefly will make the term MIN appear to the right of REC and switch the display to the minimum value stored during the last session 6 To exit recording mode press and hold the REC ENTER button for at least three seconds until the term REC disappears from the top line of the display The display will then revert to showing the current reading AUTOMATIC VS MANUAL DATALOGGING The DLM112SD can automatically log data using any of 11 sampling times from 1 second to 1 hour To view the sampling time for which the instrument was set up press the LOGGER A button once To change the datalogging sampling time perform Step 9 of the setup procedure 7 To start automatic datalogging press the REC ENTER button once The top line of the display will then show the term REC Pressing the LOGGER A button at this point will make REC flash and add the flashing term LOGGER at the top right of the display This indicates that the instrument is currently storing measured values and their time stamps in memory 8 To pause automatic datalogging press the LOGGER A button once this action makes the flashing term LOGGER disappear from the top right of the display and c
17. trument Then use the FUNC HOLD NEXT button to select temperature measurement mode and plug either a Type K or Type J thermocouple into the socket callout 1 8 on the top of the DLM112SD The display will read out the sensed temperature in degrees F or C depending on the setting chosen during setup To change the unit of measurement or to configure the instrument for use with Type J thermocouple probe press the SET W button to reenter setup mode and perform Step 7 or 8 of the procedure Along with the measured value the display also shows the type of thermocouple the DLM112SD is configured for Whenever the DLM112SD is in measurement mode you can turn off the backlight which is on by default by briefly pressing but not holding the POWER ESC button To reactivate the backlight briefly press the button again Whenever the instrument is in measurement mode you also can check the current date and time by briefly pressing the SET W button Doing so causes both values to appear briefly at the lower left of the display HOLDING AND STORING MEASUREMENTS 4 To hold a measured value of light intensity or temperature press the FUNC HOLD NEXT button during the measurement Doing so will cause the word HOLD to appear at the top of the display Pressing the FUNC HOLD NEXT button again releases the hold 5 To record and recall readings press the REC ENTER button while making measurements This will make the term REC appear at
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