Manual
Contents
1. o At small voltage ranges unsteady readings will appear before the test leads make contact with the circuit This is normal since the meter is highly sensitive When the test leads connect to the circuit the true reading will be shown AC Voltage Range Resolution Accuracy 400mV 0 1mV AV 1mV 0 8 of reading 3 digits 40V 10mv 400V 100mV 750V 1V 1 0 of reading 3 digits Input Impedance 10MO Overload protection 400mV range 250V DC or rms AC 4V 750V ranges 1000V DC or rms 750V AC Max input voltage 1000V DC or rms 750V AC Frequency range 40 to 400Hz Response Average 36 NOTE o At small voltage ranges unsteady readings will appear before the test leads make contact with the circuit This is normal since the meter is highly sensitive When the test leads connect to the circuit the true reading will be shown DC Current Range Resolution Accuracy 400A 0 1uA 4mA 1pA 40mA 10pA 1 2 of reading 3 digits 400mA 100A 4A 1mA 10A 10mA 2 0 of reading 10 digits Overload protection HA mA ranges resettable fuse F1 500mA 250V 10A range F2 10A 250V fuse quick acting Max input current mA jack LA ranges 4mA mA jack mA ranges 400mA 10A jack 10A voltage drop 37 400pA ranges 40mV 4000pA ranges 400mV 40mA ranges 40mV 400mA ranges 400mV 4A range 40mV 10A range 100Mv AC2. is highly sensitive When the test leads are connected to the circuit the true reading will be shown Under the manual range mode when OL or OL is shown on the LCD it means the measurement has exceeded the allowable range A higher range should be selected Under the manual range mode when the scale of the value to be measured is unknown select the highest range first and lower the range accordingly Frequency Measurement Plug the black test lead into the COM jack and the red test lead into the Hz jack Set the rotary switch to the Hz position or press the Hz DUTY button in the AC DC V range to switch to Hz measurement Connect test leads to the two ends of the source or load for measurement Read the numbers on the main indicator of the LCD Duty Measurement 21 Plug the black test lead into the COM jack and the red test lead into the Hz jack Set the rotary switch to the Hz position Press the Hz DUTY button to switch to DUTY measurement or press the Hz DUTY button in the AC DC V mode to switch to DUTY measurement Connect test leads to two ends of the source or load for measurement Read the numbers on the display DC AC Current Measurement WARNING USE CAUTION WHEN MEASUREING HIGH VOLTAGE CIRCUITS TO AVOID ELECTRICAL SHOCK AND INJURY DO NOT TEST VOLTAGES HIGHER THAN DC 1000V or AC 750V 22 Plug the black test lead into the COM j
3. AND REPAIR 46 iat 19 itp Test Leads Replacement Replace Batteries Replace Fusini iE CONTACT DAWSON sccccssssccecsssccesessees FEATURES eroe eere eo serene revue 2 LIMITED 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 the Box Check the Meter and accessories thoroughly before using the Meter Contact your local distributor if the Met
4. of the cover and remove the cover from the case Remove the batteries and replace the batteries with new batteries Reattach the battery compartment door to the case bottom and tighten the screws Replacing Fuse Fuses rarely need replacement Almost all blows are the result of operation error e Loosen the battery compartment door screws like in the Replace Batteries e Replace the blown fuse with one at the specified rating e Put the battery cover back and tighten the screws 47 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 48 Back Page Features 49 LCD Display Auto and Manual Ranging Auto Power Off Diode Test Audible Continuity Back Light Data Hold Low Battery Indicator
5. the REL button in HOLD mode will cancel the HOLD function and the measurement value will be stored in the memory as the reference The readings displayed will be the difference between the input value and the reference value Press the RANGE SELECT buttons or turning the rotary switch will cancel the relative measurement function and resume normal measurement The REL symbol on the display will disappear OL triggering Under the REL mode OL over limit will flash if the input value exceeds the range Press the REL button again to cancel the relative measurement function The Meter will enter the manual range mode after the REL button is pressed REL mode is not available for Hz Duty range The REL measurement cannot be performed when in OL Backlight e Press the HOLD B L button for two seconds to turn on backlight The backlight will go off automatically after 10 seconds e Press the HOLD B L button for two seconds again to manually turn off the backlight NOTE Backlight requires a large working current although the Meter backlight will be off automatically after 10 seconds frequent use of the backlight will shorten the life of the batteries Do not use the back light unless necessary When the battery voltage is lt 3 6V Er battery low will appear on the LCD When the backlight is on even if the batter is gt 3 6V ES may appear because of its large working current which causes
6. the voltage to drop The accuracy of the measurement cannot be assured when the ES symbol appears In this case no battery replacement is necessary Only do so when l appears when the back light is not being used 18 Auto Power Off e If there is no operation exclude C F button within any thirty minute period the meter will auto off e Turn the rotary switch or press any of the HOLD B L SELECT RANGE Hz DUTY or REL button to resume operation of the Meter under auto power off mode e To disable the auto power off function hold the SELECT button when turning on the Meter DC AC Voltage Measurement WARNING USE CAUTION WHEN MEASUREING HIGH VOLTAGE CIRCUITS TO AVOID ELECTRICAL SHOCK AND INJURY DO NOT TEST VOLTAGES HIGHER THAN DC 1000V or AC 750V Plug the black test lead into the COM jack and the red test lead into the V jack Set the rotary switch to the V position 19 NOTE 20 Press the SELECT button to switch to DC or AC measurement Press the RANGE button to choose the auto range or manual range mode Connect the test leads to the voltage source or load for measurement Read the numbers on the main indicator of the LCD The polarity symbol denotes the polarity of the end connected by the red test lead At small voltage ranges unsteady readings will appear before the test leads make contact with the circuit This is normal since the Meter
7. x10Lux 10Lux calibrated to standard 40000 incandescent lamp Repeatability 2 44 Diode Test Resolution Function Pt 1mV Displaying approximate forward voltage of diode Forward DC current 1mA Reversed DC voltage 1 5V Overload Protection 250V DC or rms AC Continuity Test Function Built in buzzer will sound if resistance is lower than 400 Open circuit voltage 0 5V Overload Protection 250V DC or rms AC 45 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 4E 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 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 Test Leads Replacement A WARNING REPLACE THE TEST LEADS WITH IDENTICAL OR COMPATIBLE LEADS LEAD SPEC 1000V 10A Replace new leads if the current leads are worn 46 Replacing Batteries Follow these steps to replace batteries Turn off the Meter Pull up the stand loosen the battery compartment door screws pull from the lower part
8. A ranges 4mA mA jack mA ranges 400mA 10A jack 10A Overload protection LA mA ranges resettable fuses F1 500mA 250V 10A range F2 10A 250V fuse quick acting NOTE The range by duty of the Hz mode is larger than that of the voltage or current mode 42 Relative Humidity on RH and humidity display Range Resolution Accuracy 20 95 0 1 5 0 RH Operating temperature 0 C to 40 C Sampling Period 20s Temperature Temperature on sensor thermo resistor NTC and temperature display Range Resolution Accuracy C 0 1 C 0 C to 40 C 2 C F 0 1 F O F to 40 F 2 F Sampling Period 20s Temperature on sensor thermocouple and main Display Resolution Accuracy 20 C to 0 C 5 0 of reading or t 3 C 0 C to 400 C 1 0 of reading Sene or t 2C 400 C to 2 0 of reading 1000 C 43 4 F to 32 F 5 0 of reading 1832 F or 6 F 32 F to 752 F 1 0 of reading or t 4 F 752 F to 2 0 of reading Overload protection Sound Level dB resettable fuses F1 500mA 250V Range Resolution Accuracy 40 100dB 0 1 dB 3 5 dB at 94dB 1kHz sine wave Typical instrument frequency range 100 8000Hz Luminance Lux Range Resolution Accuracy Lux 1Lux 5 0 of reading 10 digits 4000 at color temp 2856K
9. Current Range Resolution Accuracy 400pA 0 1pA 4mA 1pA 40mA 10pA 1 5 of reading 5 digits 400mA 1004A 4A 1mA 10A 10mA 3 of reading 10 digits Overload protection HA mA ranges resettable fuse F1 500mA 250V 10A range F2 10A 250V fuse quick acting Max input current mA jack A ranges 4mA mA jack mA ranges 400mA 10A jack 10A voltage drop 400pA ranges 40mV 4000pA ranges 400mV 38 40mA ranges 40mV 400mA ranges 400mV 4A range 40mV 10A range 100mV Frequency range 40 to 400Hz Response Average Resistance Range Resolution Accuracy 4000 0 10 4kQ 10 40kQ 100 1 2 of reading 2 digits 400kQ 1000 4MQ 1kQ 40MQ 10kQ 2 0 of reading 5 digits Open circuit voltage 0 25V Overload protection 250V DC or rms AC Capacitance Range Resolution Accuracy 40nF 10pF 400nF 0 1nF 4uA 1nF 3 0 of reading 3 digits 40uF 10nF 100uF 100nF Overload protection 250V DC or rms AC 39 Frequency Range Resolution Accuracy 9 999Hz 0 001Hz 2 0 of reading 5 digits 99 99Hz 0 01Hz 2 0 of reading 5 digits 999 9Hz 0 1Hz 9 999kHz 1Hz 99 99kHz 10Hz 2 0 of reading 5 digits 199 9kHz 100Hz gt 200kHz reference only By Hz mode Measurement range 0 200kHz Input voltage range 0 5V 10V rms AC higher input voltage at highe
10. Dawson DSM101N Digital Multimeter with Environmental Tester User s Manual gt m BB BBB aD gt oa E REL dB De cr _ MHz ka ac 88 08 i TABLE OF CONTENTS LIMITED WARRANTY AND LIMITATION OF LIABILITY 2 cis reas e cis T 3 Out of the BoxError Bookmark not defined Accessories eeeeeseesse esee ener 4 Safety Information Certification ise er ERR bna INTRODUCTION eee e eere eere OVerVIEW ote o oes Figures and Components Buttons and Components Display Description eese USING THE METER eere 14 Preparation cccccccececececececeseseseseseseseseeess 14 DC AC Voltage Measurement 19 Frequency Measurement sess 21 Duty Measurement sse 21 DC AC Current Measurement 22 Resistance Measurement Continuity esee eene 26 Relative Humidity Measurement 96RH 27 Temperature Measurement with Thermo ResistOt ci cea said vere coun reuse ede 28 Temperature Measurement with Thermocouple esee 29 Sound Level Measurement dB 30 Luminance Measurement 31 SPECIFICATIONS e eeee eee eene 34 General Specification esess 34 Technical Specifications 35 MAINTENANCE
11. HE CAPACITANCE BEFORE MEASURING TEMPERATURE Turn the rotary switch to TEMP position OL is displayed Plug the red end of the K type thermocouple into the TEMP jack and black end into the COM jack Touch the surface of the object or area with the thermocouple for measurement Press the C F button to choose C or F measurement Read the result on the LCD 29 NOTE Temperature compensation circuit is placed inside the front part of the Meter It may take a longer time to reach thermal balance The Meter should be exposed to the environment for a long period for accurate reading Sound Level Measurement dB WARNING AVOID ELECTRICAL SHOCK AND INJURY DO NOT CONNECT THE TEST LEADS Turn the rotary switch to the dB position Point the sensor located in the front of the Meter to the sound source The sound level in dB will be shown on the LCD NOTE Strong wind over 10m sec striking on the microphone may cause misreading A windscreen should be placed in front of the microphone in such circumstances 30 Luminance Measurement WARNING AVOID ELECTRICAL SHOCK AND INJURY DO NOT CONNECT TEST LEADS Turn the rotary switch to the Lux or x10Lux position Point the sensor located in the front of the Meter at the light source Read the result on the LCD NOTE 1 When OL is displayed choose a higher range Ex x10 Lux 2 S
12. ack When the current to be measured is under 400mA plug the red test lead into the wA mA jack when the current to be measured is over 400mA but under 10A plug the red test lead into the 10A jack Set the rotary switch to the A or mAzz or uA range position Press the SELECT button to switch between DC and AC measurements Press the RANGE button to choose auto range or manual range mode Connect the test leads to the circuit Read the numbers on the display The polarity symbol denotes the polarity of the red test lead NOTE o Under the manual range when OL or OL is shown on the LCD it means the measurement has exceeded the allowable range a higher range should be selected o Under the manual range when the scale of the value to be measured is unknown select the highest range first and then lower the range accordingly o AX indicates the maximum current of the mA jack is 400mA and the maximum current of the 10A jack is 10A At the 10A jack current exceeding the limit will blow the fuse Resistance Measurement WARNING TO AVOID ELECTRICAL SHOCK AND INJURY POWER OFF THE CIRCUIT AND DISCHARGE THE CAPACITANCE BEFORE MEASURING RESISTANCE Plug the black test lead into the COM jack and the red test lead into the Q jack 23 Set the rotary switch to the Q position The mode is set to measure capacitance by default Press the RANGE b
13. e Fuse must be replaced with ratings specified in the manual A Important Safety Information Never use the Meter to measure voltages that might exceed 1000V DC 750V AC above earth ground Always be careful when working with voltages above 60V DC or 30V AC RMS Keep fingers behind the probe barriers while measuring Never connect the Meter leads across a voltage source while the rotary switch is in the resistance diode or continuity mode Doing so can damage the Meter Do not perform resistance diode and continuity measurements on powered circuits Inspect test leads and probes for cracks breaks or crazes on the insulation before using the Meter Repair or maintenance should be implemented by trained personnel Certification CAT II This meter has meet IEC1010 1 standard with an overvoltage category 1000V CAT II and pollution degree 2 CAT III This meter has meet IEC1010 1 standard with an overvoltage category 600V CAT III and pollution degree 2 C the Meter is compiled to EMC requirements Introduction Overview The DSM101N is a portable multifunction digital multimeter featuring a large three line backlight LCD screen Basic functions include AC DC voltage AC DC current resistance capacitance frequency and duty cycle measuring It also features a thermocouple ambient temperature relative humidity sound level and luminosity measurements The retractable stand is ideal for travel and
14. er or any components are damaged or malfunction Accessories Test Leads 1set Thermocouple 1pc 1 5V AAA Battery 3pcs User s Manual Safety Information Z WARNING TO REDUCE THE RISK OF FIRE ELECTRICAL SHOCK PRODUCT DAMAGE OR PERSONAL INJURY PLEASE FOLLOW THE SAFETY INSTRUCTIONS DESCRIBED IN THE USER MANUAL READ THE USER MANUALS BEFORE USING THE METER AN 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 Do not place Meter in a strong magnetic field this may cause false readings 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 Important safety information please refers to the user manual Earth ground Indicates compliance with requirements for double insulation Possible of high voltage fe g
15. f the light source and the light detector should be larger than 15 times the 33 maximum size of the illuminant surface of the light source or the light sensor Specifications General Specification 34 Auto range and manual range Overload protection is provided for all modes Maximum voltage between terminals and earth ground 1000V DC or 750 VAC Operating altitude max 2000 meters 7000 ft Display LCD Maximum value display 3999 4 Polarity indication automatic for negative polarity Overload indication OL or OL Sampling time approx 0 4 second per sample Function and Unit display Auto power off time 30 min Resettable fuse F1 500mA 250V Fuse protection F2 10A 250V quick acting Power Supply 1 5Vx3 AAA batteries e Battery low indication ES on LCD Temperature Index 0 1x Accuracy F e Operating Temperature 0 C to 40 C 32 F to 104 F e Storage Temperature 10 C to 50 C 10 F to 122 F e Dimension 195x92x55mm 7 7x3 6x2 17 in e Weight approximate 400g 140z including batteries Technical Specifications DC Voltage Range Resolution Accuracy 400mV 0 1mV 4V 1mV t 0 796 of reading 2 40V 10mV digits 400V 100mV 1000V 1V Input Impedance 10MO Overload protection 400mv range 250V DC or rms AC 4V 1000V ranges 1000V DC or 750V rms AC Max input voltage 1000V DC or 750V rms AC 35 NOTE
16. in the current and voltage Press the SELECT button to switch between resistance diode continuity and capacitance measurements Switch Ranges 15 When the Meter is turned on it is at the auto range mode for current voltage and resistance measurement by default Press the RANGE button for manual range mode The range will go up one level after each press and return to the lowest level when the highest level is reached Hold the RANGE button for two seconds to return to auto range Switching Between Frequency Duty Press the Hz DUTY button at the frequency range to switch between frequency and duty measurements When the Meter is in the voltage and current modes press the Hz DUTY button to measure the frequency of the voltage or current signal Another press on the Hz DUTY button will change it into the Duty range for measuring the duty cycle of the voltage or current signal Press the Hz DUTY again go back to normal mode Switching To Relative Measurement 16 Press the REL button to enter the relative measurement mode The instantaneous reading when the button is pressed will is stored in memory as the reference value for later measurements The displayed reading is the difference between the input value and stored reference value l e REL present reading input value reference value NOTE 17 Press the REL button again to cancel the relative measurement function Pressing
17. k Set the rotary switch to the PF range position Press the SELECT button to switch to Pt Diode measurement Connect the red test lead to the anode and the black test lead to the cathode of the diode for testing Read the numbers on the LCD NOTE o The Meter will show approximate forward voltage drop of the diode o When the test leads are reversed or opened OL will appear on the LCD Continuity WARNING TO AVOID ELECTRICAL SHOCK AND INJURY POWER OFF THE CIRCUIT AND DISCHARGE THE CAPACITANCE BEFORE TESTING CONTINUITY Plug the black test lead into the COM jack and the red test lead into the jack Set the rotary switch to the range position Press the SELECT button to switch to continuity measurement Connect the test leads to two ends of the circuit If resistance of the circuit is less than 400 the built in buzzer will sound 26 NOTE Ifthe test leads are open or resistance of the circuit is over 4000 OL will appear on the LCD Relative Humidity Measurement RH This function is used for measuring ambient humidity around the Meter NOTE 27 Turn the rotary switch to any position other than OFF Current ambient humidity will is shown on the humidity display RH Humidity sensor is placed inside the front of the Meter and therefore it may take a longer time to reach balance with the environment being measured Al
18. office use This DSM101N is truly an All in One meter that is ideal for both professional and hobbyists Figures and Components Front Panel 5 o did ES ps i onal Buttons and Components SOF 00 SM gy Oe NY es PRPrPrRPrPrRPRP PB B m m s See 10 LCD liquid crystal display RANGE Button REL Button HOLD B L Button Hz Duty Button Panel Rotary Switch 10A Input Jack mA pA Temp Input Jack COM Input Jack V Hz AF Q Input Jack OFF Power off SELECT Button C F Switch Humidity amp Temperature sensor Light Sensor Microphone Buttons and Components Description C F Button Switch units between C and F Hz Duty Button Switch between Hz Duty HOLD B L Button Hold reading or hold the button to control backlight SELECT Button Switch between DC AC or between 4F 0 20 RANGE Button Choose auto or manual range REL Button Relative measurement Rotary Switch To select different functions 10A Input Jack Input for current between 0 10A mA pA Temp Input for current from 07400mA Input Jack and temperature v Hz AF 0 Input for voltage resistance Input Jack frequency duty cycle capacitance diode and continuity measurement COM Common terminal Humidity Sensor To measure humidity Light Sensor To measure lux 11 Display Description 1 Temperature Indicator 2 Humidity Indicator 3 Main Sc
19. pectral sensitivity characteristic 100 80 60 40 20 Relative Sensitivity 400 500 600 700 800 900 1000 Wave Length nm Most suitable for visible light 400 700nm detection 31 32 3 Recommended luminance Location Lux Home Wardrobe Bedroom Lavatory 707150 Stairway Corridor 707150 Living Room Bathroom Kitchen 200 750 Writing Working Area 50071000 Artisanry Sewing 75072000 Office Conference Room Reception 200 750 Room Administrative Area 700 1 500 Typing Area 1000 2 000 Factory Packing Passage Area 150 300 Assembly Line 300 750 Inspection Work 750 1 500 Electronic Parts Assembly Line 1 500 3 000 Hotel Public Area Restroom 100 200 Reception Front Desk 200 1 000 Shop Stairway Corridor 150 200 Display Window 1 500 3 000 Hospital Ward Warehouse 100 200 Examination Room 300 750 Operating Room Emergency 750 1 500 Room School Auditorium Indoor Gym 100 300 Classroom 200 750 Laboratory Library 500 1 500 Appendix Conversion between luminance and light intensity E 1 r Where E luminance unit Lux I intensity of light source unit cd r distance between illuminant surface of light source and light detector unit m When making measurement the shortest distance between the illuminant surface o
20. r frequency Overload protection 250V DC or rms AC By V mode Measurement range 0 40kHz Input voltage range 0 5V 750V rms AC higher input voltage at higher frequency Input Impedance 10MO Max input voltage 1000V DC or 750V rms AC By pA mA or A mode Measurement range 0 40kHz 40 Input current range gt 1 4 range rms AC higher input voltage at higher frequency Max input current mA jack LA ranges 4mA mA jack mA ranges 400mA 10A jack 10A Overload Protection HA mA ranges resettable fuses F1 500mA 250V 10A range F2 10A 250V fuse quick acting NOTE When measuring frequency the range in Hz mode is larger than that in V or A mode Also note that the value measured beyond the range given above is for reference only Duty Range Resolution Accuracy 0 1 99 996 0 196 3 096 By Hz mode Frequency response 0 200kHz Input voltage range 0 5V 10V rms AC higher input voltage at higher frequency Overload protection 250V DC or rms AC higher input voltage at higher frequency 41 By V mode Frequency response 0 40kHz Input voltage range 0 5V 600V rms AC higher input voltage at higher frequency Input Impedance 10MO Max Input Voltage 1000V DC or 750V rms AC By pA mA or A range Frequency response 0 40kHz Input current range 21 4 of the rms AC for the range higher input voltage at higher frequency Max input current mA jack u
21. reen 12 Ac Alternating Current Dc Direct Current x AC Or DC gt Diode e Buzzer H Hold REL Relative Measurement Auto Auto Range E3 Low Battery Indicator C Celsius F Fahrenheit Rh Relative Humidity Units F Farad capacitance Q Ohm Resistance V Volt Voltage A Ampere Current Hz Hertz Frequency 96 Duty Cycle dB Decibel Lux lluminance Unit x10 Decuple n u m k M Nano Micro Milli Kilo And Mega 13 Using the Meter Preparation 14 Switch on the power by turning the rotary switch If the battery voltage is lower than 3 6V the symbol will appear and the batteries should be replaced The A symbol next to the input lead shows that the input voltage or current should not exceed the specified value in order to protect the internal circuit from damage Turn the rotary switch to the required function and range to be measured Under the manual mode choose the highest range when the value to be measured is unknown When making connection connect the common test lead first and then the powered test lead Removed the charged test lead first when disconnecting Readings Hold Press HOLD B L button to hold the readings of current measurement Press HOLD B L button again to release the hold Switch Functions Press the SELECT button to switch between AC and DC measurements
22. so it takes a longer intermission time about 20 seconds for sampling and the Meter has to be exposed to the environment for a longer time to get accurate readings Hence it is not suitable for measuring rapidly changing ambient humidity It will take some time for a steady RH reading when the ambient humidity changes Temperature Measurement With build in Thermo Resistor This function is used for measuring the ambient temperature around the Meter NOTE 28 Turn the rotary switch to any position other than OFF The current ambient temperature will be shown on the temperature indicator of the LCD Press the C F button to switch between C and F measurement Temperature sensor thermo resistor is placed inside the front of the Meter and therefore it may take a longer time to reach thermal balance with the environment Also it has a longer intermission time about 20 second for sampling and the Meter has to be exposed to the environment for a longer time for accurate readings Hence it is not suitable for measuring rapidly changing ambient temperature Working temperature of the Meter is 32 104 F If exposed to an environment beyond 32 and 104 F the Meter may show a wider range of temperature measurement but the accuracy cannot be ensured and may damage the Meter Temperature Measurement With Thermocouple WARNING TO AVOID ELECTRICAL SHOCK AND INJURY POWER OFF THE CIRCUIT AND DISCHARGE T
23. utton to choose auto range or manual range mode Connect the test leads to the ends of the resistor or circuit Read the numbers on the LCD NOTE At the manual range mode when OU or OL is shown on the LCD it means the measurement has exceeded the range and a higher range should be selected When the input is open OL is displayed on the LCD to indicate overload For measuring resistance above 1M0 it may take a few seconds to get a steady reading This is normal for high resistance measurement Capacitance Measurement WARNING TO AVOID ELECTRICAL SHOCK AND INJURY POWER OFF THE CIRCUIT AND DISCHARGE THE CAPACITANCE BEFORE MEASURING CAPACITANCE 24 NOTE Diode 25 Plug the black test lead into the COM jack and the red test lead into the 4k jack Set the rotary switch to the 4k range position Press the SELECT button to switch to 4k measurement After fully discharging the capacitor connect the test leads to the two ends of the capacitor for measurement Read the numbers on the LCD It takes some time to stabilize reading when measuring high capacitance 30 seconds for the 200uF range Sometimes reading may be shown even when the test leads are not connected to the circuit In such case press the REL button to reset the reading and take the measurement again Plug the black test lead into the COM jack and the red test lead into the PF jac
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