Model UT30A: OPERATING MANUAL Table of Contents (1) Title A. Introduction B. Safety Rules C. International Electrical Symbols D. Feature E. Specification 1. DC Voltage 2. AC Voltage 3. DC Current 4. AC Current 5. Resistance 6. Diode, Transistor, Continuity Test F.
Model UT30A: OPERATING MANUAL Table of Contents (2) Title G. Make Measurements 1. DC Voltage Measurement 2. AC Voltage Measurement 3. DC Current Measurement 4. AC Current Measurement 5. Resistance Measurement 6. Diode measurement 7. Transistor hFE Measurement 8. Continuity test 9. “Hold”, “Power” Button Function H. Fuse and Battery replacement I.
Model UT30A: OPERATING MANUAL A. Introduction UT30A Multimeter is 3 3/4 digits with steady operations, fashionable structure and highly reliable hand-held measuring instrument. The meter can measure DC/AC Voltage, DC/AC Current, Resistance, Diode, Transistor hFE, Continuity, and etc. It is an ideal carry-on tool for users.
Model UT30A: OPERATING MANUAL B. Safety Rules(1) 1. Read the manual carefully before use. Use the Meter only as specified in this manual, otherwise, the protection provided by the Meter may be impaired. 2. Do not operate the Meter unless the bottom case has been closed as terminal can carry voltage. 3. Inspect the insulation of the test leads and no damages to the test leads before using the Meter. 4. As soon as the battery indicator’s “ ” appears, replace the battery to ensure accurate readings. 5.
Model UT30A: OPERATING MANUAL B. Safety Rules(2) 8. When measuring voltage higher than DC 60V or AC 30Vrms, pay extra attention to avoid electric shock. 9. Use only 0.5A/250V φ 5X20(mm) fast acting ceramic fuse to replace the bad one. 10. Do not operate or store the Meter under high temperature or humid condition, otherwise, the Meter will get worse. 11. Do not change internal circuit to avoid damages to the meter and danger to the user. 12. Periodically wipe the case with cloth and mild detergent.
Model UT30A: OPERATING MANUAL C. International Electrical Symbols AC or DC AC (Alternating Current) DC (Direct Current) Grounding Double Insulated Deficiency of Built-In Battery Diode Fuse Continuity Test Safety Rules CAUTION-FOR CONTINUED PROTECTION AGAINST FIRE, REPLACE ONLY WITH FUSE OF THE SPECIFIED VOLTAGE AND CURRENT RATINGS.
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Model UT30A: OPERATING MANUAL E. Specification(1) 1. DC Voltage Range 400mV 4V 40V 400V 500V Accuracy (0.8%+3) Resolution 0.1mV 1mV 10mV 100mV 1V (0.
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Model UT30A: OPERATING MANUAL E. Specification(3) 3. DC Current Range 400µA 4mA 40mA 400mA 10A Resolution 0.1µA 1µA 10µA 100µA 10mA Accuracy (1%+2) (1.2%+2) (1.5%+2) Overload Protection: 0.5A/250v fuse. Un-fuse at 10A, measuring time limit is equal or less than 10 seconds, and time interval should be equal or over 15 minutes. Measuring voltage drop: Full range is 400m V.
Model UT30A: OPERATING MANUAL E. Specification(4) 4. AC Current Range 400µA 4mA 40mA 400mA 10A Resolution 0.1µA 1µA 10µA 100µA 10mA Accuracy (1.3%+5) (2%+5) Overload Protection: 0.5A/250V fuse. Un-fuse at 10A; measuring time limit is equal to or less than 10 seconds; time interval is equal or over 15 minutes. Voltage drop: 400mV for full range.
Model UT30A: OPERATING MANUAL E. Specification(5) 5. Resistance Range 400Ω 4kΩ 40kΩ 400kΩ 4MΩ 40MΩ Resolution 0.1Ω 1Ω 10Ω 100Ω 1KΩ 10KΩ Accuracy (1.2%+2) (1%+2) (1.2%+2) (1.5%+2) Overload Protection: All ranges are 230V (DC/ AC current).
Model UT30A: OPERATING MANUAL E. Specification(6) 6. Diode, Transistor, Continuity Test Function Diode Transistor Continuity Test Range Input Protection 230V DC or AC Resolution 1mV hFE 1β 230V DC or AC 0.
Model UT30A: OPERATING MANUAL F. Operation Plate 1. 2. 3. 4. 5. 6. 7.
Model UT30A: OPERATING MANUAL G. Make Measurements(1) First, set rotary switch to proper position, after several seconds of selfcheck, the meter will enter measuring state. When “ ” appear on LCD, replace a new battery to ensure accurate display. Second, symbol beside the input jack, warns you when testing current and voltage, input values must not exceed the limit.
Model UT30A: OPERATING MANUAL G. Make Measurements(2) 1. DC Voltage Measurement (figure 2) 1) Never measure voltage value exceeding 500V, although it is possible to get the reading, which will cause damages to the internal circuit and hurt users; 2) Measuring value input from “VΩ mA” (red test lead) and “COM” (black test lead.
Model UT30A: OPERATING MANUAL G. Make Measurements(3) 4) For ranges except 400mV, input impedance 10MΩ, this can cause measuring tolerance at high impedance circuit ,If circuit impedance is equal or less than 10kΩ, you can ignore the tolerance (0.1% or lower). 5) The meter would clatter with flash of LCD reading if input exceeding 1000V, which warns you should pay extra attention.
Model UT30A: OPERATING MANUAL G. Make Measurements(4) 2. AC Voltage Measurement (figure 3) Same as DC voltage measurement, however, the meter has auto-range function with initial range of 4V, and input exceeding 750V would make it clatter with LCD glittering, which warns you should pay extra attention.
Model UT30A: OPERATING MANUAL G. Make Measurements(5) 3. DC Current Measurement (figure 4) 1) This range is manual range. Do not measure, when value between open voltage and earth exceeding safety voltage 60V, to avoid damages to the Meter or to the instruments under test, and hurt the user. 2) Before measurement, cut off the power of object to be measured and inspect whether input terminal or rotary switch is set to the proper range. Ensure it is proper, and then you can measure the object with power on.
Model UT30A: OPERATING MANUAL G. Make Measurements(6) 3) If the magnitude of current is unknown, you should set rotary switch to the higher range, then adjust to a lower range until a satisfactory reading is obtained. 4) Measuring value inputs from “V mA” or “10A” jack (red test leads) and “COM” jack (black test leads). 5) For “V mA” input jack, the Meter has 0.5A/250V ( 5x20mm) ceramic fuse overload protection, if overloaded, the fuse will burn up, so replace with a new one with the same specification.
Model UT30A: OPERATING MANUAL G. Make Measurements(7) 4. AC Current Measurement (figure 5) Same as DC current measurement.
Model UT30A: OPERATING MANUAL G. Make Measurements(8) 5. Resistance Measurement (figure 6) 1) To avoid damages to the Meter, when measuring resistance, cut off the power of the object and no charge in capacitor. 2) Measuring value inputs from “VΩ mA” jack (red test leads) and “COM” jack (black test leads).
Model UT30A: OPERATING MANUAL G. Make Measurements(9) 3) Wires takes 0.1Ω -0.3Ω tolerance at function of 400Ω when measuring resistance. To get an accurate reading, you can subtract the short circuit values of the 2 test leads. 4) It will take several seconds for the display to become stabilize when resistance value is over 1MΩ, it is normal, because it is auto-range.
Model UT30A: OPERATING MANUAL G. Make Measurements(7) 6. Diode measurement (figure 7) 1) Cut off the power supply of the object to avoid damages to the Meter when measuring diode, no charge in capacitor. 2) Measuring value inputs from “VΩ mA” jack (red test leads) and “COM” jack (black test leads).
Model UT30A: OPERATING MANUAL G. Make Measurements(8) 3) When measuring voltage drop of PN, for a good silicon semiconductor structure, normal positive reading should stay between 0.5V~0.8V. Negative display being “OL” means open circuit; at this time, the red test lead is positive pole, and the black one is negative pole. In addition, “V” acts as unit of this range.
Model UT30A: OPERATING MANUAL G. Make Measurements(9) 7. Transistor hFE Measurement (figure 8) 1) 2) 3) 4) Check that the transistor is PNP or NPN type at first. Connect the transistor to be measured to the corresponding jacks. LCD displays hFE reference value.
Model UT30A: OPERATING MANUAL G. Make Measurements(10) 8. Continuity test (figure 9) Before testing continuity, power off and no charge in capacitor to avoid damages to the Meter. Measuring value inputs from “VΩ mA” jack (red test lead) and “COM” jack (black test lead). If the impedance of measured circuits is equal or less than 80Ω, the Meter would clatter, it means the circuit is close. Display on LCD is circuit resistance. (80 Ω is a dividing value for OPEN or CLOSE.
Model UT30A: OPERATING MANUAL G. Make Measurements(11) 9. “Hold”, “Power” Button Function 1) Pressing “Hold” button holds current reading displayed on LCD in open state, press it again to release the current reading displayed on LCD. 2) At power on state, press Hold to enter and exit the touch hold mode. 3) At hold mode, it can capture the present reading and display on the LCD; otherwise, the reading is a random value.
Model UT30A: OPERATING MANUAL H. Fuse and Battery replacement 1. 2. 3. 4. Remove inputs & test leads from terminals. Remove two rubber feet and two screws from the bottom case. Separate the case bottom from the case top. Replace the battery or fuse with the identical type and specification as stated on this operating manual. 5. Rejoin the case bottom and case top, and reinstall two screws and two rubber feet.
Model UT30A: OPERATING MANUAL I. Included Accessories 1. Operating Manual 2. Test Leads 3. 2 pieces of 1.
Model UT30A: OPERATING MANUAL ~ END ~ * The manual is subject to changes without separate notice.
