UNI-T UT208A Operating Manual
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UNI-T UT208A Operating Manual

UNI-T UT208A Operating Manual

Digital clamp multimeter
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Summary of Contents for UNI-T UT208A

  • Page 2: Table Of Contents

    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 DC/AC Current Measurement G. Temperature Measurement(UT208A only) H. Capacitance measurement(UT208A only)
  • Page 3 UT207A/208A/209A Operating Manual Specifications A. General Specifications B. Environmental Requirements Accuracy Specifications Maintenance A. General Service B. Replacing the Battery...

  • Page 4: Overview

    To avoid electric shock or personal injury, read the “Safety Information” and “Rules for Safe Operation” carefully before using the Meter. Digital 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.

  • Page 5: Unpacking Inspection

    English Operating Manual 1 piece Test Lead 1 pair Point Contact Temperature Probe (Only UT208A) (This included point contact temperature probe can only be used 1 pair up to 230℃. For any measurement is higher than that, the rod type temperature probe must be used)

  • Page 6: Safety Information

    UT207A/208A/209A Operating Manual Safety Information This Meter complies with the standards IEC61010: in pollution degree 2, overvoltage category (CAT II 600V, CAT III 300V) and double insulation. CAT II: Local level, appliance, PORTABLE EQUIPMENT etc., with smaller transient overvoltages than CAT III. CAT III: Distribution level, fixed installation, with smaller transient overvoltages than CAT IV.

  • Page 7: Rules For Safe Operation

    UT207A/208A/209A Operating Manual Rules for Safe Operation Warning To avoid possible electric shock or personal injury, and to avoid possible damage to the Meter or to the equipment under test, adhere to the following rules: ● Before using the Meter inspect the case. Do not use the Meter if it is damaged or the case (or part of the case) is removed.
  • Page 8 UT207A/208A/209A Operating Manual changeover of range shall be made during measurement is conducted to prevent damage of the Meter. ● Do not carry out the measurement when the Meter’s back case and battery compartment are not closed to avoid electric shock. ●...
  • Page 9 UT207A/208A/209A Operating Manual electrical specifications replacement parts. ● The internal circuit of the Meter shall not be altered at will to avoid damage of the Meter and any accident. ● Soft cloth and mild detergent should be used to clean the surface of the Meter when servicing.

  • Page 10: International Electrical Symbols

    UT207A/208A/209A Operating Manual International Electrical Symbols Double Insulated 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...

  • Page 11: The Meter Structure

    UT207A/208A/209A Operating Manual The Meter Structure (see figure 1) ① Hand Guards: to protect user’s hand from touching the dangerous area. ② Trigger: press the lever to open the transformer jaws. When the pressure on the lever is released, the jaws will close. ③...

  • Page 12: Display Symbols

    UT207A/208A/209A Operating Manual Display 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 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.

  • Page 14: Functional Buttons

    Below table indicated for information about the functional button operations. Button Operation Performed Press SELECT button to select the alternate functions including SELECT Ω UT208A only) Range feature: Exit AUTO and enter MANUAL ranging. RANGE In MANUAL, select next input range. EXIT to return to AUTO. AUTO is default.
  • Page 15 UT207A/208A/209A Operating Manual When the Meter is at %Hz, V and A , press %Hz to measure frequency and duty cycle. Press ZERO to zeroing the display before measuring AC/DC ZERO voltage, AC/DC current, resistance and capacitance. Automatic Power Off The display blanks and the Meter goes into a “sleep”...

  • Page 16: The Effectiveness Of Functional Buttons

    UT207A/208A/209A Operating Manual The Effectiveness of Functional Buttons Not every functional buttons can be used on every rotary switch positions. Below table describe which functional buttons can be used on which rotary switch positions. Rotary Switch Functional Buttons Positions SELECT RANGE HOLD ZERO...

  • Page 17: Measurement Operation

    UT207A/208A/209A Operating Manual Measurement Operation A. DC/AC Voltage Measurement (see figure 3) Figure 3...
  • Page 18 UT207A/208A/209A Operating Manual Warning To avoid harms to you or damages to the Meter from eletric shock, do not attempt to measure voltages higher than 750V AC or 1000V DC, although readings may be obtained. To measure DC/AC voltages, connect the Meter as follows: 1.

  • Page 19: Measuring Resistance

    UT207A/208A/209A Operating Manual circuit impedance is less than or equal to 10kΩ, the error is negligible (0.1% or less). ● When DC/AC voltage measurement has been completed, disconnect the connection between the testing leads and the circuit under test and remove testing leads from the input terminals.
  • Page 20 UT207A/208A/209A Operating Manual Figure 4 Note: ● To 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: Testing For Continuity

    UT207A/208A/209A Operating Manual input terminals beforehand, press ZERO to automatically subtract the value measured when the testing leads are short-circuited from the reading. ● For high-resistance measurement (>1MΩ), it is normal to take several seconds to obtain a stable reading. ●...
  • Page 22 UT207A/208A/209A Operating Manual measurement mode. 3. The buzzer 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.

  • Page 23: Testing Diodes

    UT207A/208A/209A Operating Manual Note ● 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 continuity testing has been completed, disconnect the connection between the testing leads and the circuit under test and remove testing leads from the input terminals.
  • Page 24 UT207A/208A/209A Operating Manual 1. Insert the red test lead into the VΩHz terminal and black test lead into the COM terminal. 2. Set the rotary switch to . Press SELECT to switch to  m easurement 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.
  • Page 25 UT207A/208A/209A Operating Manual Figure 6...

  • Page 26: Frequency And Duty Cycle Measurement

    UT207A/208A/209A Operating Manual E. Frequency and Duty Cycle Measurement (see figure 7) Warning To avoid harms to you or damages to the Meter from eletric shock, do not attempt to measure voltages higher than 750V AC or 1000V DC, although readings may be obtained.
  • Page 27 UT207A/208A/209A Operating Manual Figure 7...

  • Page 28: Dc/Ac Current Measurement

    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.
  • Page 29 UT207A/208A/209A Operating Manual Figure 8...
  • Page 30 UT207A/208A/209A Operating Manual zeroing. ● Center the conductor within the transformer jaw, then release the Meter slowly until the transformer jaw is completely closed. Make sure the conductor to be tested is placed at the center of the transformer jaw, otherwise it will cuase ±1.0 % deviation.
  • Page 31 UT207A/208A/209A Operating Manual ● The meter will zero automatically. ● When the measuring current >1A, press Hz button to toggle between AC current and frequency measurement mode. But the frequency readings obtained from this range is only for reference. ● Change to AC: UT207A/208A: Couple AC and average value response method.

  • Page 32: Temperature Measurement(Ut208A Only)

    UT207A/208A/209A Operating Manual G. Temperature Measurement (UT208A only, see figure 9) To measure temperature measurement, connect the Meter as follows: 1. Insert the red temperature probe into the VΩHz terminal and the black temperature probe into the COM terminal. 2. Set the rotary switch to ℃ measurement mode.
  • Page 33 UT207A/208A/209A Operating Manual Figure 9...

  • Page 34: Capacitance Measurement(Ut208A Only)

    UT207A/208A/209A Operating Manual H. Capacitance measurement (UT208A only, see figure 10) 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. To measure capacitance, do the following: 1.
  • Page 35 UT207A/208A/209A Operating Manual Figure 10...

  • Page 36: Specifications A.general Specifications

    UT207A/208A/209A Operating Manual Specifications A.General Specifications: ● Display: 3 3/4 digits LCD display, Maximum display 3999. ● Polarity: Auto ● Overloading: Display OL or –OL. ● Battery Deficiency: Display ● Sampling: 3 times per second. ● Measurement Deviation: The conductor being meaured 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.

  • Page 37: Environmental Requirements

    UT207A/208A/209A Operating Manual B. Environmental Requirements ● The Meter 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℃...

  • Page 38: Accuracy Specifications

    UT207A/208A/209A Operating Manual Accurate Specifications Accuracy: ±(a% reading + b digits), guarantee 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) 0.001mV 0.01V ±(0.8%+1) DC1000V/AC750V 400V 0.1V 1000V...
  • Page 39 UT207A/208A/209A Operating Manual B. AC Voltage Range Resolution Accuracy Overload protection 400mV 0.1mV ±(1.2%+20) 0.001mV 0.01V ±(1.2%+3) DC1000V/AC750V 400V 0.1V 750V ±(1.2%+5) Remarks: ● Input 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.
  • Page 40 UT207A/208A/209A Operating Manual C. Resistance Range Resolution Accuracy Overload protection 400Ω 0.1Ω ±(1.2%+2) 4kΩ 0.001KΩ 40kΩ 0.01KΩ ±(1.0%+2) DC1000V/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...
  • Page 41 UT207A/208A/209A Operating Manual E. Diode Test Range Resolution Accuracy Overload Protection 0.5V~0.8V DC1000V (Open 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 ≤...
  • Page 42 UT207A/208A/209A Operating Manual G. Duty Cycle Range Resolution Accuracy Overload Protection 0.1%~99.9% 0.1% For reference only DC1000V/AC750V H. DC Current Range Resolution Accuracy Overload protection 0.01A ±(2.0%+5) 400A 0.1A ±(2.0%+3) 1000A DC/AC 1000A ±(1.5%+5) I. AC Current Range Resolution Accuracy Frequency Response Overload protection 0.01A...
  • Page 43 UT207A/208A/209A Operating Manual J. Temperature (UT208A only) Range Resolution 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 0.001nF For reference only 40nF 0.01nF 400nF 0.1nF ±(4.0%+3) DC1000V/AC750V 4μF 0.001μF...

  • Page 44: General Service

    UT207A/208A/209A Operating Manual Maintenance This section provides basic maintenance information including battery replacement instruction. Warning Do not attempt to repair or service your Meter unless you are qualified to do so and have the relevant calibration, performance test, and service information.

  • Page 45: Replacing The Battery

    UT207A/208A/209A 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 UT207A/208A/209A Operating Manual Make sure the transformer jaw and the tets leads are disconected from the circuit being tested before opening the case bottom. To replace the battery: 1. Turn the Meter off and remove all the connections from the input terminals 2.
  • Page 47 UT207A/208A/209A Operating Manual...

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Ut209aUt207a

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