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UNI-T UT207A, Operating Manual

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23

UT207A/208A/209A Operating Manual

1. Insert the red test lead into the 

V

Ω

Hz

 terminal and black test lead into the 

    

COM

 terminal.

2. Set the rotary switch to        . Press 

SELECT

 to switch to        measurement 

    mode. For forward voltage drop readings on any semiconductor component, 

    place the red test lead on the component’s anode and place the black test 

    lead on the component’s cathode. The LCD will display 

OL

 indicating diode 

    being tested is open or polarity error display.

Note

  ●   To obtain a more precise reading, you could remove the objects being tested 

       from the circuit when measuring.

  ●   To avoid harms to you or damages to the Meter from eletric shock, do not 

       attempt to input voltages higher than 33V AC or 70V DC.

  ●   When diode testing has been completed, disconnect the connection between 

       the testing leads and the circuit under test and remove testing leads from the 

       input terminals.

Summary of Contents for UT207A

Page 1: ......

Page 2: ...mbols The Meter Structure Display Symbols Functional Buttons The Effectiveness of Functional Buttons Measurement Operation A DC AC Voltage Measurement B Measuring Resistance C Testing for Continuity D Testing Diodes E Frequency and Duty Cycle Measurement F DC AC Current Measurement G Temperature Measurement UT208A only H Capacitance measurement UT208A only Table of Contents Title Page ...

Page 3: ... UT207A 208A 209A Operating Manual 35 35 36 37 43 43 44 Specifications A General Specifications B Environmental Requirements Accuracy Specifications Maintenance A General Service B Replacing the Battery ...

Page 4: ...Clamp Multimeter Model UT207A UT208A UT209A hereafter referred to as the Meter are 3 3 4 digits with steady operations fashionable structure and highly reliable measuring instrument The Meter uses large scale of integrated circuit with double integrated A D converter as its core and has full range overload protection The Meter can measure AC DC Voltage AC DC Current Frequency Duty Cycle Resistance...

Page 5: ...lish Operating Manual 1 piece 2 Test Lead 1 pair 3 Point Contact Temperature Probe Only UT208A This included point contact temperature probe can only be used up to 230 For any measurement is higher than that the rod type temperature probe must be used 4 Tool box 1 piece 5 9V Battery NEDA1604A or 6LF22 1 piece In the event you find any missing or damage please contact your dealer immediately 1 pair...

Page 6: ...h smaller transient overvoltages than CAT IV Use the Meter only as specified in this operating manual otherwise the protection provided by the Meter may be impaired In this manual a Warning identifies conditions and actions that pose hazards to the user or may damage the Meter or the equipment under test A Note identifies the information that user should pay attention to International electrical s...

Page 7: ...l Check the test leads for continuity Replace damaged test leads with identical model number or electrical specifications before using the Meter Do not apply more that the rated voltage as marked on the Meter between the terminals or between any terminal and grounding If the value to be measured is unknown use the maximum measurement position and reduce the range step by step until a satisfactory ...

Page 8: ...n and range for your measurements Do not use or store the Meter in an environment of high temperature humidity explosive inflammable and strong magnetic field The performance of the Meter may deteriorate after dampened When using the test leads keep your fingers behind the finger guards To avoid electric shock do not touch the bare wires connectors unused input terminals or the circuit under testi...

Page 9: ... surface of the Meter when servicing No abrasive and solvent should be used to prevent the surface of the Meter from corrosion damage and accident The Meter is suitable for indoor use Turn the Meter off when it is not in use and take out the battery when not using for a long time Constantly check the battery as it may leak when it has been using for some time replace the battery as soon as leaking...

Page 10: ... Grounding Warning Refer to the Operating Manual AC Alternating Current DC Direct Current Continuity Test Diode Deficiency of Built In Battery AC or DC Danger of High Voltage Conforms to Standards of European Union 9 UT207A 208A 209A Operating Manual ...

Page 11: ... lever to open the transformer jaws When the pressure on the lever is released the jaws will close Functional Buttons Input Terminals LCD Display Rotary Switch Transformer Jaw designed to pick up the AC and DC current flowing through the conductor It could transfer current to voltage The tested conductor must vertically go through the Jaw center Figure 1 ...

Page 12: ...splay Symbols see figure 2 Figure 2 1 Test of diode 2 The continuity buzzer is on 3 Indicator for zeroing 4 Data hold is active 5 The Meter is in the auto range mode in which the Meter automatically selects the range with the best resolution ...

Page 13: ...onal injury replace the battery as soon as the battery indicator appears 11 The unit of transistor hEF 12 The unit of temperature Centigrade temperature 13 The unit of temperature Fahrenheit temperature 14 The unit of capacitance UT208A only 15 Volts The unit of voltage mV Millivolt 16 Amperes amps The unit of current 17 The unit of resistance Ω Ohm kΩ Kilohm MΩ Megohm 18 The unit of frequency Hz ...

Page 14: ...re Exit AUTO and enter MANUAL ranging In MANUAL select next input range EXIT to return to AUTO AUTO is default Press once to turn the display backlight on Press again to turn the display backlight off otherwise it will automatically off after 15 seconds Press HOLD to enter the Hold mode in any mode except Hz the Meter beeps Press HOLD again to exit the Hold mode to return to measurement mode the M...

Page 15: ...ent resistance and capacitance Hz Automatic Power Off The display blanks and the Meter goes into a sleep mode if you have not changed the rotary switch position or pressed a button for 15 minutes While in Sleep mode pressing the any effective Functional button or turning the rotary switch could turn the Meter on To disable the sleep mode function press SELECT button while turning on the meter ...

Page 16: ...al buttons can be used on every rotary switch positions Below table describe which functional buttons can be used on which rotary switch positions V Ω Hz 40A 400A 1000A Rotary Switch Functional Buttons Positions SELECT RANGE HOLD ZERO Hz N A N A N A N A N A N A N A N A N A N A N A N A N A N A N A ...

Page 17: ...16 UT207A 208A 209A Operating Manual Measurement Operation A DC AC Voltage Measurement see figure 3 Figure 3 ...

Page 18: ...otary switch to V DC mesaurement mode is a default Press SELECT to switch to AC measurement mode Press RANGE to enter manual ranging 3 Press Hz button to measure frequency or duty cycle but the frequency or duty cycle readings obtained from this range is only for reference 4 Connect the test leads across with the object being measured The measured value shows on the display Note AC Millivolt is a ...

Page 19: ...ut terminals B Measuring Resistance see figure 4 Warning To avoid damages to the Meter or to the devices under test disconnect circuit power and discharge all the high voltage capacitors before measuring resistance To measure resistance connect the Meter as follows 1 Insert the red test lead into the VΩHz terminal and black test lead into the COM terminal 2 Set the rotary switch to Ω 3 Connect the...

Page 20: ...o obtain a more precise reading you could remove the objects being tested from the circuit when measuring The test leads can add 0 1Ω to 0 3Ω of error to resistance measurement To obtain precision readings in low resistance measurement short circuit the ...

Page 21: ... or 70V DC When resistance measurement has been completed disconnect the connection between the testing leads and the circuit under test and remove testing leads from the input terminals Testing for Continuity see figure 5 Warning To avoid damages to the Meter or to the devices under test disconnect circuit power and discharge all the high voltage capacitors before measuring continuity To test for...

Page 22: ...er sounds if the resistance of a circuit under test is less than 10Ω 4 The buzzer may or may not sound if the resistance of a circuit under test is between 10Ω to 100Ω 5 The buzzer does not sound if the resistance of a circuit under test is higher than 100Ω Figure 5 ...

Page 23: ...m the input terminals D Testing Diodes see figure 6 Warning To avoid damages to the Meter or to the devices under test disconnect circuit power and discharge all the high voltage capacitors before testing diodes Use the diode test to check diodes transistors and other semiconductor devices The diode test sends a current through the semicondutor junction then measure the voltage drop across the jun...

Page 24: ...k test lead on the component s cathode The LCD will display OL indicating diode being tested is open or polarity error display Note To obtain a more precise reading you could remove the objects being tested from the circuit when measuring To avoid harms to you or damages to the Meter from eletric shock do not attempt to input voltages higher than 33V AC or 70V DC When diode testing has been comple...

Page 25: ...24 UT207A 208A 209A Operating Manual Figure 6 ...

Page 26: ... the red test lead into the VΩHz terminal and the black test lead into the COM terminal 2 Set the rotary switch to Hz Frequency measurement mode is a default or press Hz button to switch to duty cycle measurement mode 3 Connect the test leads across with the object being measured The measured value shows on the display Note When frequency measurement has been completed disconnect the connection be...

Page 27: ...26 UT207A 208A 209A Operating Manual Figure 7 ...

Page 28: ... conductor within the transformer jaw then release the Meter slowly until the trasnformer jaw is completely closed Make sure the conductor to be tested is placed at the center of the transformer jaw otherwise it will casue deviation The Meter can only measure one conductor at a time to meausre more than one condutor at a time will cause deviation Note for DC measure The Hall components are very se...

Page 29: ...28 UT207A 208A 209A Operating Manual Figure 8 ...

Page 30: ...ront case face up while the bottom case face down Below testnig method can obtain more accurate DC current Power off the tested conductor current Press the lever to open the transformer jaw When the reading is stabled at the minimal press ZERO to display zero Power on the tested conductor current read out the reading after the Meter is stable Note for AC measure Center the conductor within the tra...

Page 31: ...adings obtained from this range is only for reference Change to AC UT207A 208A Couple AC and average value response method UT209A Couple AC and True RMS response method Input sine wave to adjust Non sine wave must follow the below data to adjust Peak factor 1 4 2 0 add 1 0 on the stated accuracy Peak factor 2 0 2 5 add 2 5 on the stated accuracy Peak factor 2 5 3 0 add 4 0 on the stated accuracy ...

Page 32: ...shows on the display Note When the Meter is at range display OL to remind user to insert temperature probe The Meter automatically displays the room temperature when the temperature probe is inserted but without any input The included point contact temperature probe can only be used up to 230 For any measurement is higher than that the rod type temperature probe must be used When the temperature m...

Page 33: ...32 UT207A 208A 209A Operating Manual Figure 9 ...

Page 34: ...To improve the measurement accuracy of small value capacitors less than 10nF press zero with the test leads open to subtract the residual capacitance of the Meter and leads 3 It is recommended to use test clip to carry out measurement to reduce the effect of internal distributed capacitor Note Disconnect circuit power and discharge all high voltage capacitors before testing Capacitors When capacit...

Page 35: ...34 UT207A 208A 209A Operating Manual Figure 10 ...

Page 36: ...eaured is not placed in the center of the jaw during AC DC current measurement it will cause extra 1 deviation based on the stated accuracy Drop Test 1 meter drop test passed Max Jaw Size 55mm diameter Projected Max Current conductor size 45mm diameter Electro Magnetic When carrying out measurement near the electro magnetic it may cause unstable or wrong reading Power 1 x 9V battery 6LF22 1604A Di...

Page 37: ... is suitable for indoor use Altitude Operating 2000m Storage 10000m Safety Compliances IEC 61010 CATII 600V CATIII 300V over voltage and double insulation standard pollution degree 2 Temperature and humidity Operating 0 30 85 R H 30 40 75 R H 40 50 45 R H Storage 20 60 85 R H ...

Page 38: ...uarantee for 1 year Operating temperature 23 5 Relative humidity 80 R H Temperature coefficient 0 1 specified accuracy 1 A DC Voltage Range Resolution Accuracy Overload protection 400mV 0 1mV 0 8 3 4V 0 001mV 40V 0 01V 0 8 1 DC1000V AC750V 400V 0 1V 1000V 1V 1 0 3 Remark Input Impedance 10MΩ ...

Page 39: ...put Impedance 10MΩ Frequency Response 40Hz 400Hz Change to AC UT207A 208A Couple AC and average value response method UT209A Couple AC and True RMS response method Input sine wave to adjust Non sine wave must follow the below data to adjust Peak factor 1 4 2 0 add 1 0 on the stated accuracy Peak factor 2 0 2 5 add 2 5 on the stated accuracy Peak factor 2 5 3 0 add 4 0 on the stated accuracy ...

Page 40: ...00V AC750V 400kΩ 0 1KΩ 4MΩ 0 001MΩ 1 2 2 40MΩ 0 01MΩ 1 5 2 D Continuity Test Range Resolution Accuracy Overload Protection 0 1Ω Around 10Ω the buzzer beeps DC1000V Open circuit voltage approx 0 4V AC750V Remarks The buzzer beep when the resistance of a circuit under test is 10Ω The buzzer may or may not beeps when the resistance of a circuit 10Ω ...

Page 41: ...en circuit voltage approx 1 5V AC750V F Frequency Range Resolution Accuracy Overload Protection 400Hz 0 1Hz 4kHz 0 001kHz 40kHz 0 01kHz 400kHz 0 1kHz 0 1 3 DC1000V AC750V 4MHz 0 001MHz 40MHz 0 01MHz Remarks Input Sensitivity as follows When 100kHz 300mV rms When 100kHz 600mV rms Input amplitude a 300mV a 10V rms 1mV ...

Page 42: ... 0 1 For reference only DC1000V AC750V H DC Current Range Resolution Accuracy Overload protection 40A 0 01A 2 0 5 400A 0 1A 2 0 3 1000A DC AC 1000A 1A 1 5 5 I AC Current Range Resolution Accuracy Frequency Response Overload protection 40A 0 01A 2 5 8 400A 0 1A 2 5 5 50Hz 60Hz 1000A DC AC 1000A 0 1A 2 0 2 ...

Page 43: ...lution Accuracy Overload Protection 40 0 8 5 40 1000 1 0 400 2 5 3 1KΩ 400 1000 3 3 K Capacitance UT208A only Range Resolution Accuracy Overload Protection 4nF 0 001nF For reference only 40nF 0 01nF 400nF 0 1nF 4 0 3 DC1000V AC750V 4μF 0 001μF 40μF 0 01μF 100mF 0 1μF 5 0 10 ...

Page 44: ...ectrical shock or damage to the Meter do not get water inside the case A General Service Periodically wipe the case with a damp cloth and mild detergent Do not use abrasives or solvents To clean the terminals with cotton bar with detergent as dirt or moisture in the terminals can affect readings Turn the Meter power off when it is not in use Take out the battery when it is not using for a long tim...

Page 45: ... Operating Manual B Replacing the Battery see figure 11 Warning To avoid false readings which could lead to possible electric shock or personal injury replace the battery as soon as the battery indicator appears figure 11 ...

Page 46: ...f and remove all the connections from the input terminals 2 Turn the Meter s front case down 3 Remove the screw from the battery compartment and separate the battery compartment from the case bottom 4 Take out the old battery and replace with a new 9V battery 6LF22 1604A 5 Rejoin the case bottom and the battery compartment and reinstall the screw This operating manual is subject to change without ...

Page 47: ...UT207A 208A 209A Operating Manual ...

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