Dawson DSM150
Contents
1. 7 5 L x 3 5 W x 1 67 H 190 L x 89 W x 42 5 H mm Weight about 7 oz 200 g including batteries Maintenance and Repair Repair Please follow these steps closely if the Meter is not functioning properly Check batteries replace with new batteries if low battery indicator E appears Follow User s Manual to confirm all procedures Before sending Meter back for repair include a description of the problems encountered Remove batteries and pack Meter well to 16 avoid damage in delivery Dawson does not cover damage due to delivery Repair or service not covered in this manual should be performed only by the authorized service center or qualified personnel Meter Calibration The Meter should be calibrated once a year Standard light source is required for calibration Please contact Dawson for details Replacing Battery Follow these steps to replace battery 17 Turn off the Meter Loosen the battery compartment door screw and remove the door from the case bottom Remove the battery and replace with a new battery Reattach the battery compartment door to the case bottom and tighten the screw Contact Dawson Dawson Tools Inc 1142 S Diamond Bar Blvd 858 Diamond Bar CA 91765 Phone 310 728 6220 www DawsonTools com X Do not recycle 18 Back Page Features LCD Display Auto and Manual Range Auto Power Off MAX MIN Display Relative Measuremen2. Dawson DSM150 Digital Light Meter User s Manual DAWSON MODs gl BBB Daimio CE Feja TABLE OF CONTENTS LIMITED WARRANTY AND LIMITATION OF LIABILITY wccsiccccccesccceccsescceccbeccescssscceeccrscesecets 3 Out of Box Error Bookmark not defined ACCOSSOPIOS gt 4 seintel kv vaated kus vee A Safety Information CONIPICOION E TED INTRODUCTION ccccseessssssssssssssssseees 6 OVERVIEW oe ov ss kisti hie saak oan Vives 6 Figures and Components 7 Buttons and Components 7 Display Description uuusslhlsn 9 USING THE METER ccsssssesssssseseseees About the Meter ecese Concepts of illuminance scales Conversion of illuminance and light DTD 11 Basic Functions remmee 12 Readings Hold Auto and Manual Range 12 Maximum and Minimum Measurement 13 Lux FC Measurement ossis 13 Relative and Peak Measurement 13 ZERO CQliDration ssecccesssscesesnecessteceeees 14 Button Sound ON OFF 15 Auto Power Off SPECIFICATIONS sssscccssssccccsssseesssceees 15 MAINTENANCE AND REPAIR 16 A 010 KEITTIS 16 Meter Calibration ssassn 17 Replacing Battery sneonen 17 CONTACT DAWSON sccccssssccecsssseesessees 18 FEATURES 7 ccccsceosassuecesecesevesessveees Back Page LI
3. E DUST EXPLOSIVE GAS OR VAPOR About the Meter The light sensor of this meter is designed to simulate the sensitive curve of light obtained through human eyes The spectral coverage is between 320mm and 730mm For best result use the Meter to measure light within this range Measurement outside the range ex infrared range may be inaccurate The light sensor is calibrated by common electric incandescent lamps required by CIE under the color temperature of 2854 K Reading may be different for the spectrum of other lamps Light source should be facing light sensor directly The optical detector should be exposed to the light source for 2 minutes before making measurement 10 Influences such as shadows and other factors on the optical detector should be avoided Concepts of illuminance scales A Lux is defined as the illuminance on a surface of one square meter when a uniform source of one candela is placed one meter away from the surface A foot candle Fc indicates the illuminance on a surface of one square foot when a uniform source of one candela is placed one foot away from the surface 1 Fc 10 764 lux 1 lux 0 09290 Fc Conversion of illuminance and light intensity E 1 r2 Where E Illuminance value Unit Lux Light intensity of the light source Unit cd r Distance from the luminous surface of light source to the optical detector Unit m 11 During measurement the minimum d
4. MITED WARRANTY AND LIMITATION OF LIABILITY This instrument from Dawson Tools Inc will be free from defects in workmanship and material for three years from the date of original purchase This warranty does not cover defects resulting from damage caused by the user such as drops neglect misuse unauthorized alteration usage outside of specified conditions contamination or improper repair maintenance To receive service on the instrument if it becomes necessary during the warranty period contact your nearest Dawson authorized service center at 800 898 6991 or visit www DawsonTools com to obtain a return authorization within the US only A return authorization is necessary before returning any instrument to Dawson no service will be provided without a return authorization The user is responsible for properly packing the unit and charges such as shipping freight and insurance charges The extent of Dawson s liability is limited solely to the repair replacement of the instrument The above warranty in its entirety is inclusive and no other warranties written or oral are expressed or implied Out of Box Check the Meter and accessories thoroughly before using the Meter Contact your local distributor if the Meter or any components are damaged or malfunction Accessories 9V Batteries 1pc Soft Case 1pc User s Manual Safety Information A WARNING TO REDUCE THE RISK OF FIRE ELECTRICAL SHOCK PRODUCT DAMAGE OR PERSONAL INJ
5. URY PLEASE FOLLOW THE SAFETY INSTRUCTIONS DESCRIBED IN THE USER MANUAL READ THE USER MANUALS BEFORE USING THE METER A WARNING TO ENSURE SAFE OPERATION AND LIFE OF THE METER DO NOT PLACE THE METER IN ANY ENVIRONMENT WITH HIGH PRESSURE HIGH TEMPERATURE DUST EXPLOSIVE GAS OR VAPOR Avoid shaking dropping or any kind of impacts when using or transporting the Meter To avoid electric shock or personal injury repairs or servicing not covered in this manual should be performed only by qualified personnel Avoid direct exposure to sunlight to ensure extended life of the Meter Use only the batteries indicated in the Technical Spec Avoid exposing batteries to humidity Replace batteries as soon as the low battery indicator appears Please keep the original packing for future shipping purposes ex Calibration After opening the box check for any damage during delivery Safety Symbols on the Meter A Important safety information please refers to the user manual A Important Safety Information Repair or maintenance should be implemented by trained personnel Certification o CE The Meter is compiled to EMC reguirements Introduction Overview The DSM150 is a high precision portable digital light meter The Meter features a bar graph display for easy reading of ambient illuminance maximum and minimum reading LX FC measuring and peak relative measuring This convenient Meter is ideal in many a
6. is pressed the instantaneous measurement is set as reference level 0 and the value displayed is the difference between the current measurement and the reference level Change range and units as desired To enter PEAK mode Hold REL PEAK until PEAK shows up on the screen Change range and units as desired Press and hold REL PEAK to return to normal mode ZERO Calibration To calibrate the Meter cover the sensor with the sensor cover Press and Hold HOLD ZERO button till ADJ is displayed on the screen Once ADJ disappears calibration is done NOTE The Meter can be calibrated while the sensor is exposed to light This will serve as a relative measurement 14 Button Sound ON OFF Press the power button O to turn off Button sound press O again to turn it back on Auto Power Off The Meter will switch off if not in used for more than 10 minutes Specifications Analog bar display 3 digits max reading of 1999 w Analog Bar Display Sampling rate 22 times sec Measurement range 20 to 200k Lux 20 to 20k FC Measurement spectrum 320 720nm wavelength A Sensor Silicon Photoelectric Diode Power supply 1 x 9V battery Battery life 200hrs 15 Operating temperature 10 F to 122 F 10 50 C Max Operating Humidity 80 RH Storage temperature 10 F to 122 F 10 50 C Max Storage humidity 80 RH Outside measurement
7. istance between the luminous surface of the light source and the light sensor should be greater than 15 times the diameter of the light sensor or light source choose the one with the larger diameter Basic Functions Press the power button to turn on the Meter the default setting is auto range Lux measurement The measured ambient light level is displayed Face the light sensor to the light source Readings Hold Press HOLD ZERO button to hold the current reading Press HOLD ZERO button again to release the hold Auto and Manual Range 12 Press RANGE to switch from auto range to manual Range MANU is displayed on the top left corner of the screen Press RANGE multiple times to choose the desired range Hold RANGE to switch back to Auto range AUTO is displayed Maximum and Minimum Measurement Press MAX to hold the maximum value on the display Press MAX key again to switch to minimum n Hold MAX MIN return to normal measurement mode Lux FC Measurement To switch units between Lux and FC press LX FC Default unit is Lux Relative and Peak Measurement Difference between Peak and Max Peak measures the instantaneous output of the light source at a higher sampling rate where Max displays the maximum value obtained at a lower sampling rate Press REL PEAK to enter Relative measurement REL mode 13 When REL
8. reas such as construction inspection photography greenhouse gardening and much more Figures and Components Buttons and Components 1 2 3 4 Light sensor protection cover Light sensor LCD display screen Power and touch tone ON OFF e Power on off Press the key to activate the device and hold for 1 second to turn it off e Touch tone on off When power is on press the key to turn on off the touch tone Max and Min button Lux Fc button Data hold and Zero calibration e Data hold Press to enter exit data hold mode o Zero calibration Press for 1 second to perform zero calibration function Relative value and peak value measurement o Relative value measurement Press key to enter exit relative value measurement mode o Peak value measurement Hold for 1 second to enter exit peak value measurement mode 9 Key for manual range switching n Press the button to select ranges Hold for 1 second to return to auto range mode Front Panel Display Description Auto Measurement Mode Peak Value Measurement Mode 1 Manual Range Switching Mode 2 Data Hold Mode 3 Bar Graph Measurement Display 4 Current Measurement Value 5 Lux Unit 6 FcUnit 7 8 9 Low Battery Indicator 10 Relative Value Measurement Mode 11 12 Max and Min Values Inguiry Using the Meter A WARNING TO ENSURE SAFE OPERATION AND LIFE OF THE METER DO NOT PLACE THE METER IN ANY ENVIRONMENT WITH HIGH PRESSURE HIGH TEMPERATUR
9. t Peak Mode Back Light Data Hold Low Battery Indicator 19
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