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UNI-T UT207A, Руководство по эксплуатации

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27

UT207A/208A/209A Operating Manual

F.  DC/AC Current Measurement

 (see figure 8)

      Warning

The operating temperature must be 0

℃

 ~40

℃

 when measuring current.

To measure current, do the following:

1. Set the rotary switch to 40A    ,400A   , or 1000A    . DC mesaurement mode is 

    a default.  Press 

SELECT

 to switch to AC measurement mode. 

2. Hold the Meter tight, don’t release. 

3. Press the lever to open the transformer jaw.

4. Center the 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 senstive not only to the magnet but also to 

       heat and machines reaction force.  Any shock will cause the changing in 

       reading in the short time.

  ●   When the Meter does not display 0 before measurement, press 

ZERO

 to 

Содержание UT207A

Страница 1: ......

Страница 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 ...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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 ...

Страница 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 ...

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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 ...

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

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

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

Страница 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...

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

Страница 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...

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

Страница 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...

Страница 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 ...

Страница 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...

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

Страница 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...

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

Страница 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...

Страница 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 ...

Страница 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 ...

Страница 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 ...

Страница 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 ...

Страница 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 ...

Страница 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 ...

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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 ...

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

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