INSTRUCTION MANUAL
Contents
1. 3 INSTRUCTION MANUAL Digital Multimeter aa D HOLD 6 AUTO POWER OFF 6 DC AC 300mA 5A RESET 6 e E t a O NV ag a 1 7 a yr 1 800 547 5740 e Fax 503 643 6322 www ueitest com email info Queitest com Introduction The DM5B digital multimeter is a pocket sized hand held battery operated voltage current and continuity measurement instrument It provides the accuracy and numerous functions typically found in full sized multimeters Features include e 750 Volts AC amp DC e 5 Amps AC amp DC e Continuity e Resistance to 30 e Megohms e Autoranging Analog bar graph e Data hold e Fuse protected current ranges Safety Notes Before using this meter read all safety information carefully In this manual the word WARNING is used to indicate conditions or actions that may pose physical hazards to the user The word CAUTION is used to indicate conditions or actions that may damage this instrument Always follow industry standard safety practices including protective clothing gloves and safety glasses when appropriate Do not attempt to measure any voltage that exceeds 1000 volts AC or DC with this meter Do not attempt to use this meter if either the meter or the test leads have been damaged Turn it in for repair at a qualified repair facility Ensure meter leads are fully seated by making a quick continuity check of the leads prior to making voltage measurements2. mA 250 V 300 mA 100 mA Resistance Accuracy Protections 1 2 3 digits Continuity Frequency 4 1 K Hz tone when lt 20 0 10 1 Protected to 500 V Feature Summary Maximum voltage between any terminal and earth ground Digital display Input impedance Storage temperature Operating temperature Battery type Two 1 5 V L11554 Button Cell GPATG UEi AB13 5 Amp fuse 250 V 5 A 5x15 mm 2AG UEi AF250 500 mA 250V 0 5 A 5x15 mm 2AG UEi AF251 DM5B MAN P 4 J DM5B Digital Multimeter Limited Warranty The DM5B is warranted to be free from defects in materials and workmanship for a period of one year from the date of purchase If within the warranty period your instrument should become inoperative from such defects the unit will be repaired or replaced at UEi s option This warranty covers normal use and does not cover damage which occurs in shipment or failure which results from alteration tampering accident misuse abuse neglect or improper maintenance Batteries and consequential damage resulting from failed batteries are not covered by warranty Any implied warranties including but not limited to implied warranties of merchantability and fitness for a particular purpose are limited to the express warranty UEi shall not be liable for loss of use of the instrument or other incidental or consequential damages expenses or economic loss or for any claim or claims for such damage exp
3. the red lead to one side of the circuit i e wire and the black lead to the other side If the circuit resistance is approximately 20 ohms or less a continuous tone will sound indicating continuity Diode Testing 1 Set the function switch to the Continuity Diode position 2 Press the push button immediately below and to the left of the LCD The diode symbol will be displayed in the lower left of the display the overload symbol O L in the center and volts V in the upper right 3 Isolate the diode from other circuit components and connect the red test lead to the diode and the black to the other A black band is normally printed around the end of the cathode side of the component Note the displayed value 4 Reverse the red and black test leads and again note the displayed value If the reading in the first forward biased direction indicates some measurable value and the reading in the reversed direction shows an overload O L the diode is good If the displayed value is low or even measurable in both directions the diode is probably shorted If the display indicated an overload O L in both directions the diode is probably open Some diodes however require a higher biasing voltage than this meter supplies See UEi s catalog to purchase an economical high power diode test lead adapter set if necessary Amperage Measurement AN mania The current function
4. AC V The meter will default to the voltage source press the DC AC push button to switch to AC The meter indicates which mode you have selected at the far left of the display 2 Touch the probes to the circuit under test and read the display NOTE If the input voltage exceeds this meter s range the indicator will display the overload symbol O L If a negative DC voltage is being measured the symbol will appear on the left side of the display N CAUTION The resistance continuity and diode modes are protected to a maximum of 500 volts To avoid personal injury or damage to the instrument do not make measurements in these modes when open circuit voltage may exceed 500 volts DC or AC DM5B MAN Resistance Testing Ensure your circuit is isolated from other circuit paths to prevent testing the wrong path The DM5B can measure up to 30 megohms 1 Set the function switch to the resistance position 0 AM and note the overload symbol O L on the display Megohms MO Is displayed in the lower right 2 Touch the red lead to one side of the circuit i e resistor and the black lead to the other side and read the display Continuity Testing 1 Set the function switch to the Continuity Diode position The continuity symbol will be displayed in the upper left of the display the overload symbol O L in the center and ohms Q in the lower right 2 Touch
5. Keep your fingers away from the test lead s metal probe contacts when making measurements Always grip the leads behind the finger guards molded into the probes Use a current clamp adapter when measuring current that may exceed 10 amps See the accessories in UEI s full line catalog Do not open the meter to replace batteries or fuses while the probes are connected DM5B MAN AN wanna Exceeding the specified limits of this meter is dangerous and can expose the user to serious or possibly fatal injury e Always turn off power to a circuit or assembly under test before cutting unsoldering or breaking the current path Even small amounts of current can be dangerous e Always disconnect the live test lead before disconnecting the common test lead from a circuit e In the event of electrical shock ALWAYS bring the victim to the emergency room for evaluation regardless of the victim s apparent recovery Electrical shock can cause an unstable heart rhythm that may need medical attention Higher voltages and currents require greater awareness of physical safety hazards Before connecting the test leads turn off power to the circuit under test set the meter to the desired function and range connect the test leads to the meter first then to the circuit under test Reapply power e If any of the following indications occur during testing turn off the power source to the circuit under test e Arcing Flame e Smoke e Extreme Hea
6. e display the batteries must be replaced immediately Low battery voltage can cause incorrect readings and consequential damage 1 To replace the batteries remove the meter from its carrying case 2 Slide the battery cover plate on the back of meter out 3 Replace both batteries at once with type listed in the specifiations 4 Reassemble the meter Fuse Replacement AN wannie Replace fuses with the type listed in the specifications also printed on the circuit board only 1 To replace the fuses remove the meter from its carrying case 2 Slide the battery cover plate out on the back of meter 3 Remove the three back panel retaining screws and separate the two halves 4 Locate and replace expended fuse e 5A near the bottom e 5A near the middle 5 Reassemble the meter Specifications NOTE Accuracy is stated as of reading number of least significant digits at 32 to 104 F with relative humidity up to 80 Stated accuracy Is valid for a period of one year after calibration AC conversions of this meter are average responding and calibrated to the RMS value of a pure sine wave input DC Voltage Protections Range Resolution 300 ml E 05702 di 1 2 2 digits AC Voltage Resolution Accuracy Protections saos digis P 3 DC Current Resolution Accuracy Protections 1 5 2 digits 500 mA 250 V AC Current Resolution Accuracy Protections 2 0 4 digits 500
7. enses or economic loss A purchase receipt or other proof of original purchase date will be required before warranty repairs will be rendered Instruments out of warra ntywill be repaired when repairable for a service charge Return the unit postage paid and insured to 1 800 547 5740 e FAX 503 643 6322 www ueitest com Email info Queitest com This warranty gives you specific legal rights You may also have other rights which vary from State to state PLEASE he RECYCLE Copyright 2007 UEi DM5B MAN 1 07
8. riodic Service AN WARNING Repair and service of this instrument Is to be performed by qualified personnel only Improper repair or service could result in physical degradation of the meter This could alter the protection from electrical shock and personal injury this meter provides to the operator Perform only those maintenance tasks that you are qualified to do These guidelines will help you attain long and reliable service from your meter e Calibrate your meter annually to ensure it meets original performance specifications e Keep your meter dry If it gets wet wipe dry immediately Liquids can degrade electronic circuits e Whenever practical keep the meter away from dust and dirt that can cause premature wear e Although your meter is built to withstand the rigors of daily use it can be damaged by severe impactsUse reasonable caution when using and storing the meter Cleaning Periodically clean your meter s case using a damp cloth DO NOT use abrasive flammable liquids cleaning solvents or strong detergents as they may damage the finish impair safety or affect the reliability of the structural components Clean the input terminals as follows 1 Turn the meter off and remove all test leads 2 Shake out any dirt that may be in the terminals 3 Soak a new swab with alcohol and work the swab around in each terminal DM5B MAN Battery and Fuse Replacement When the battery icon appears in the upper right of th
9. s are protected by a 150 volt rated fuse To avoid personal injury or damage to the instrument do not measure current sources having open circuit voltage greater than 250 volts DC or AC Current measurements are made in SERIES with the circuit or circuit element under test NEVER CONNECT THE TEST LEADS ACROSS A VOLTAGE SOURCE when an amps measuring position is selected This can cause damage to the circuit under test or this meter P 2 To measure current you must break the circuit under test cut a wire for example and make the meter part of the circuit This creates two connection points On one side is the power source and the other is the load If DC current is being measured a minus sign will be displayed when current is flowing opposite to the connection polarity 1 Ensure power Is off to the circuit to be tested 2 Set the rotary switch to the mA or 5A position depending on the maximum possible amperage you will be measuring The meter will default to the DC current setting If you have an AC current source press the DC AC push button to switch to AC Th meter indicates which mode you have selected at the far left of the display 3 Create a break in the circuit as described earlier and connect the meter leads to the two points created at the break 4 Apply power to the circuit and note your measurement value AN WARNING Do not remove the leads from the circuit until power is disconnected Maintenance Pe
10. t e Smell of Burning Materials e Discoloration or Melting of Components AN caution Do not attempt to remove the meter leads from the circuit under test The leads the meter or the circuit under test may have degraded to the point that they no longer provide protection from the voltage and current applied If any of these erroneous readings are observed disconnect power immediately and recheck all settings and connections International Symbols A oneen wee T pci AC e P Alternating Current arning or Caution DC Double Insulation Direct Current LI Protection Class II Not Applicable to Identified Model pane Operating Instructions V Volts 0 Ohms AN Resistor schematic symbol Continuity mode 4 1 kilohertz tone Diode schematic symbol mA Milliamps DC or AC 5A Five Amp DC or AC Meter Lead Connections A WARNING Grip leads behind finger guards when making measurements The meter leads will be connected in this manner regardless of the measurement Connect the black test lead to the terminal marked COM and the red test lead to the terminal marked V mA A 0 DC AC Voltage Measurement AN WARNING Flectric shock instrument damage or equipment damage may result if input voltages exceed 1000 Volts DC or AC RMS Do not attempt to take any unknown voltage measurement that may be in excess of 1000 Volts DC or AC RMS 1 Set the rotary switch to the V function DC V or
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