Projecta DT150 User manual

TRUE RMS MULTIMETER
P/No. DT150

IMPORTANT SAFETY INFORMATION
Please read this manual thoroughly before use and store in a safe place for future reference
WARNING
• The meter’s safety features may not protect the user if not used in accordance with the
manufacturer’s instructions.
• Keepngersawayfromthemetalprobetipswhentakingmeasurements.
• Before changing functions using the selector switch, always disconnect the test leads
from the circuit under test.
• Comply with all applicable safety codes. Use approved personal protective equipment
 whenworkingnearliveelectricalcircuits.
• Usecautiononlivecircuits.Voltagesabove30VACrms,42VACpeak
 or60VDCposeashockhazard.
• Verifyoperationbeforeusingmeterbymeasuringaknownlivevoltage.
• Measurements in the 10A range should be limited to 30 seconds maximum every 15 minutes.
• Never test resistance, diodes, or continuity on a live circuit.
• Toavoidelectricshock,disconnectpowertotheunitundertestanddischargeallcapacitorsbefore
takinganycapacitancemeasurements.Removethebatteriesandunplugthelinecords.
• RiskofElectrocution.Beforeuse,alwaystesttheVoltageDetectoronaknownlivecircuittoverify
proper operation.
• Do not touch the temperature probe to live circuits.
• Do not use the meter if the meter or test leads appear damaged.
• Do not use the meter in wet or damp environments or during electrical storms.
• Do not use the meter or near explosive vapours, dust, or gasses.
• Do not use the meter if it operates incorrectly, protection may be compromised.
• Do not use the meter while Low Battery warning is on, replace batteries immediately.
• Do not apply voltage or current that exceeds the meter’s maximum rated input limits.
• Do not measure voltages if a motor or the circuit is being switched ON or OFF. Large voltages surges
may occur that can damage the meter.

FUNCTIONS
TRUE RMS
Provides a more accurate measure of AC signals that are imperfect waveforms
MULTI-TEST
Test everything from voltage and frequency, resistance, and continuity along with the ability to test diodes
and temperature
NON-CONTACT VOLTAGE DETECTION
Safely measure AC live voltage without even touching the circuit
LCD DISPLAY
An illuminated digital LCD display will ensure clear and precise data
PRODUCT OVERVIEW
1. LCD Display
2. Non-Contact Voltage Indicator
3. MODE/RELATIVEButton
4. RANGEButton
5. MAX/MIN Button
6. HOLD/BacklightButton
7. Function Switch
8. 10AInputJack
9. COMInputJack
10.PositiveInputJack
11.Non-Contact Voltage Detector
12.Lanyard Hole
13.Test Lead Holders
14.BatteryCoverLock
15.Tilt Stand
16.Battery Cover
SYMBOLS USED ON LCD DISPLAY
1. Auto Power Off
2. AutoRanging
3. Maximum
4. Minimum
5. Display Hold
6. Diode Test
7. Continuity
8.RelativeMode
9. Degree Celsius/Degree Fahrenheit
10. Units of Measure List
11. MeasurementReading
12. Low Battey
13. Minus Sign
14. Direct Current
15. Alternating Current

BUTTON FUNCTIONS
MODE AND REL (RELATIVE) BUTTON
• PresstheMODEbuttontoselectAC/DCVoltage,AC/DCCurrent,Frequency,Ohms,DiodeTest,
Continuity or Capacitance, Temperature.
• PresstheRELbuttonfor>2secondstoturnonorofftheRelativefunction.
• TheRelativefunctionzerosoutthereadingdifferencebetweentheactualmeasurementandthestore
reference value.
NOTE:RELdoesnotworkonFrequency,DiodeTest,Continuity
RANGE BUTTON
• Whenthemeterisrstturnedon,itautomaticallygoesintoAutoRanging.
• This automatically selects the best range for the measurements being made and is generally the best
mode for most measurements.
• Formeasurementsituationsrequiringthatarangebemanuallyselected,performthefollowing:
1. PresstheRANGEbutton,the“AUTO”displayindicatorwillturnoff.
2. PresstheRANGEbuttontocyclethroughtherangesuntilyouselecttherangeyouwant.
3. PressandholdtheRANGEbuttonfor2secondstoexittheManualRangingmodeand
 returnAutoRanging.
MAX/MIN BUTTON
1. MomentarilypresstheMAX/MINbuttontoactivatetheMAX/MINmode,the“MAX”indicatorwill
appear on the LCD display, the meter will display and hold the maximum reading and will update
 whenahigher“max”occurs.
2. MomentarilypresstheMAX/MINbuttonagaintoviewthelowerreading,“MIN”indicatorwillappear
on the LCD display, the meter will display and hold the maximum reading and will update when a
 lower“min”occurs.
3. Press and hold the MAX/MIN button to end MAX/MIN and return to normal operation.
NOTE:ThemeterdoesnotautorangewhentheMAX/MINmodeisactive,thedisplaywillread‘OL’ifthe
rangeexceeded.Whenthisoccurs,exitMAX/MINandusetheRANGEbuttontoselectahighrange.MAX/
MINdoesnotworkonFrequency,DutyCycle,DiodeTest,ContinuityandCapacitance.
HOLD/BACKLIGHT BUTTON
• PresstheHOLD/BacklightbuttontoturnonorofftheHOLDfunction.
• PresstheHOLD/Backlightbuttonfor>2secondstoturnonorofftheBacklightfunction.
AUTO POWER OFF
• The auto off feature will turn the meter off after 15 minutes.
• Todisabletheautopowerofffeature,holddowntheMODEbuttonandturnthemeteron.
LOW BATTERY INDICATION
• The“ ”iconwillappearinthelowerleftcornerofthedisplaywhenthebatteryvoltage
becomes low.
• Replacethebatterywhenthisappears.

AC/DC VOLTAGE (FREQUENCY) MEASUREMENT
1. Set the rotary function switch to the V AC/DC position.
2. ToselectACorDCvoltage,presstheMODEbuttonuntiltheAC or DC symbol appears
on the LCD display.
3. InserttheblacktestleadbananaplugintothenegativeCOMInputJack;Inserttheredtestlead
 bananaplugintothePositiveInputJack.
4. Touchtheblacktestprobetiptothenegativesideofthecircuit;Touchtheredtestprobetip
to the positive side of the circuit.
5. ReadthevoltageontheLCDdisplay.
6. PresstheMODEButtontoindicateHz.
7. Readthefrequencyinthedisplay.
FREQUENCY (ELECTRONIC) MEASUREMENT
1. SettherotatoryfunctionswitchtotheHzposition.
2. InserttheblacktestleadbananaplugintothenegativeCOMInputJack;Inserttheredtestlead
 bananaplugintothePositiveInputJack.
3. Touch the test probe tips to the circuit under test.
4. Readthefrequencyinthedisplay.

AC/DC CURRENT MEASUREMENT
1. InserttheblacktestleadbananaplugintotheCOMInputJack.
2. For current measurements up to 10A AC/DC, set the rotary function switch to the 10A position and
 inserttheredtestleadintothe10AInputJack.
3. For current measurements up to 400mA AC/DC, set the rotary function switch to the mA position and
inserttheredtestleadintothePositiveInputJack.
4. For current measurements up to 4000µA AC/DC, set the rotary function switch to the µA position and
 inserttheredtestleadintothePositiveInputJack.
5. ToselectACorDCcurrent,presstheMODEbuttonuntiltheAC or DC symbol appears
on the LCD display.
6. Removepowerfromthecircuitundertest,thenopenupthecircuitatthepointwhereyouwishto
measure current.
7. Touchtheblacktestprobetiptotheneutralsideofthecircuit;Touchtheredtestprobetiptothe
 “hot”sideofthecircuit.
8. Apply power to the circuit.
9. Readthecurrentinthedisplay.
RESISTANCE MEASUREMENT
1. Set the rotary function switch to the CAP position.
2. PresstheMODEbuttonuntiltheΩsymbolappearsontheLCDdisplay.
3. InserttheblacktestleadbananaplugintothenegativeCOMInputJack;Inserttheredtestleadinto
 thePositiveInputJack.
4. Touch the test lead probes to the component under test, if the component is installed in a circuit, it is
best to disconnect one side before testing to eliminate interference with other devices.
5. Readtheresistanceinonthedisplay.

DIODE TEST
1. Set the rotary function switch to the CAP position.
2. PresstheMODEbuttonuntilthesymbolappearsontheLCDdisplay.
3. InserttheblacktestleadbananaplugintothenegativeCOMInputJack;Inserttheredtestleadinto
 thePositiveInputJack.
4. Touch the test lead probes to the diode under test.
5. Forwardvoltagewillindicate0.4to0.7VontheLCDdisplay;Reversevoltagewillindicate“OL”;
 Shorteddeviceswillindicatenear0andanopendevicewillindicate“OL”inbothpolarities.
CONTINUITY CHECK
1. Set the rotary function switch to the CAP position.
2. PresstheMODEbuttonuntilthe symbol appears on the LCD display.
3. InserttheblacktestleadbananaplugintothenegativeCOMInputJack;Inserttheredtestleadinto
 thePositiveInputJack.
4. Touch the test lead probes to the device or wire under test.
5. A beeper will sound if the resistance is approximately 50ohms or less and the resistance reading will
be shown on the display.

CAPACITANCE MEASUREMENT
1. Set the rotatory function switch to the CAP position.
2. PresstheMODEbuttonuntilthe“nF”symbolappearsontheLCDdisplay.
3. InserttheblacktestleadbananaplugintothenegativeCOMInputJack;Inserttheredtestleadinto
 thePositiveInputJack.
4. Touch the test leads to the capacitor to be tested, wait until the readings settle before ending the test.
5. Readthecapacitancevalueinthedisplay.
TEMPERATURE MEASUREMENT
1. Set the function switch to the Temp position.
2. PresstheMODEbuttonuntiltheoCoroF.
3. Connectthetemperatureprobetothebananaplugadapter,notethe–and+markingsontheadapter.
4. Connecttheadaptertothemeter,makingsurethe–sidegoesintotheCOMInputJackandthe+side
 goesintothePositiveInputJack.
5. Touch the tip of the temperature probe to the object being measured.
6. Readthetemperatureinthedisplay.

NON-CONTACT AC VOLTAGE DETECTION
1. Set the rotary function switch to the NCV position.
2. Hold the detector close to the AC voltage being tested.
3. Ifnosignalisdetected,theLCDwillshow“EF”,NCVindicatorlightwillnotashandthebuzzerwill
not sound.
4. Accordingtothedetectedsignalstrength,LCDdisplaysdifferenthorizontallines.
 •Whenthesignalisstrongest,fourhorizontallineswithappearontheLCDdisplay.
 •Whenthesignalisweakest,onlyonelinehorizontallinewillappear.
 •Meanwhile,NCVindicatorlightashesandthebuzzermakeadifferentsound.
NOTE:Thesensinglevelvarieswiththedistancebetweenthesensingpartandthe
measured AC power cord.
NOTE:Thedetectorisdesignedwithhighsensitivity.Staticelectricityorothersourcesofenergymay
randomly trip the sensor. This is normal operation.
REPLACING THE BATTERY
1. Makesuretodisconnectthetestleadsfromanysourceofvoltagebeforeremovingbatterycover.
2. Counterrotate180degreestoopenthebackcoverofbattery.
3. ReplaceoldbatterieswithtwoAAA1.5Vbatteries.
4. Reassemblethemeter.
REPLACING THE FUSES
1. Disconnect the test leads from the meter.
2. Counterrotate180degreestoopenthebackcoverofbatteryforthe500mA/600Vfastandremovethe
rear cover for the 10A/600V fast.
3. Gentlyremovetheoldfuseandinstallthenewfuseintotheholder.
4. Alwaysuseafuseofthepropersizeandvalue(500mA/600VfastblowfortheµA/mArangeor
10A/600V fast blow for the 10A range).
5. Replaceandsecuretherearcover.

GENERAL SPECIFICATIONS
Insulation Class 2, Double Insulation
Diode Test Test current approx.1 mA , open circuit voltage of 2V typical
Continuity Test Audiblesignaliftheresistanceis<50Ω
Low Battery Indication “”isdisplayed
Display 4000 count LCD
OverRangeIndication "OL'' is displayed
Polarity Minus symbol"-" is displayed for negative polarity
MeasurementRate 3 readings per second, nominal
Auto Power Off approx. 15 minutes
Input Impedance >10MΩACandDCVoltage
ACResponse TrueRMS
AC Voltage Bandwidth 50Hzto1kHz
AC Current Bandwidth 50Hzto400Hz
Batteries Two AAA 1.5V batteries
Fuse 10A/600VfastactingFuse;500mA/600VfastactingFuse
OperatingEnvironment 5 to 40°C [41 to 104° FJ
StorageEnvironment -10 to 50°C [14 to 122° Fl
Operating Humidity Max 80% up to 31 °C [87°F] decreasing linearly to 50% at 40°C
[104°F]
Storage Humidity <80%
Dimensions/Weight 154x7 4x43mm / Approx. 21 Og [No batteries]
Safety Complies with UL 61010-1 v.3 for measurement Category
III600V, Pollution Degree 2.
ELECTRICAL SPECIFICATIONS
FUNCTION RANGE RESOLUTION ACCURACY
ACTrueRMSVoltage
4.000V 0.001V ±(1.2%+3digits)
40.00V 0.01V
400.0V 0.1V ±(1.2%+5digits)
600V 1V
AllACvoltagerangesarespeciedfrom5%ofrangeto100%ofrange.
ACVoltageBandwidth:50Hzto60Hz(Allwave);50Hzto1kHz(Sinewave).
DC Voltage
400.00mV 0.1mV
±(0.5%+8digits)
4.000V 0.001V
40.00V 0.01V
400.0V 0.1V
600V 1V
AC True RMS Current
400.0µA 0.1µA
±(1.0%+5digits)4000µA 1µA
40.00mA 0.01mA
400.0mA 0.1mA ±(1.2%+8digits)
4.000A 0.001A ±(2.0%+3digits)
10.00A 0.01A ±(2.0%+5digits)
AllACcurrentrangesarespeciedfrom5%ofrangeto100%ofrange.
ACCurrentBandwidth:50Hzto60Hz(Allwave);50Hzto400Hz(Sinewave).