Related Manuals for UNI-T UT70C
Summary of Contents for UNI-T UT70C
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Page 1: Table Of Contents
Model UT70C: OPERATING MANUAL Table of Contents Title Page Overview Unpacking Inspection Safety Information Rules For Safe Operation International Electrical Symbols The Meter Structure Rotary Switch Functional Buttons Display Symbols Measurement Ranges Selecting a Measurement Range Manual Ranging and Autoranging... - Page 2 Model UT70C: OPERATING MANUAL Page Accuracy Specifications AC Voltage DC Voltage Continuity, Resistance & Conductance Test Capacitance Diodes Test DC Current AC Current Frequency & Duty Cycle Maintenance General Service Testing the Fuses Replacing the Battery Replacing the Fuses RS232C Serial Port...
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Page 3: Overview
Model UT70C: OPERATING MANUAL Overview This Operating Manual covers information on safety and cautions. Please read the relevant information carefully and observe all the Warnings and Notes strictly. Warning To avoid electric shock or personal injury, read the "Safety Information" and "Rules for Safe Operation"... -
Page 4: Unpacking Inspection
Model UT70C: OPERATING MANUAL Unpacking Inspection Open the package case and take out the Meter. Check the following items carefully to see any missing or damaged part: Item Description Operating Manual 1 piece Test Lead 1 pair Test Clip 1 pair... -
Page 5: Safety Information
Model UT70C: OPERATING MANUAL Safety Information CE Version: The Meter complies with the standards IEC61010-1:in pollution degree 2, overvoltage category CAT III 1000V, CAT IV 600V and double insulation . UL Version: The Meter complies with the standards UL61010B-1, in pollution degree 2, overvoltage category CAT II 1000V and double insulation. -
Page 6: Rules For Safe Operation
Model UT70C: OPERATING MANUAL Rules For Safe Operation (1) 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 7 Model UT70C: OPERATING MANUAL Rules For Safe Operation (2) l Disconnect circuit power and discharge all high- voltage capacitors before testing resistance, conductance, continuity, diodes, current, or capacitance. Before measuring current, check the Meter's fuses and turn off power to the circuit before connecting the Meter to the circuit.
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Page 8: International Electrical Symbols
Model UT70C: OPERATING MANUAL International Electrical Symbols AC (Alternating Current) DC (Direct Current) AC or DC Grounding Double Insulated Deficiency of Built-In Battery Continuity Test Diode Capacitance Test Fuse Warning. Refer to the Operating Manual Conforms to Standards of European Union... -
Page 9: Rotary Switch
Model UT70C: OPERATING MANUAL Rotary Switch Below table indicated for information about the rotary switch positions. Rotary Function Switch Position Power is turned off. AC voltage measurement. DC voltage measurement. DC millivolt measurement. : Continuity test. : Resistance measurement. : Capacitance test. -
Page 10: Functional Buttons
Model UT70C: OPERATING MANUAL Functional Buttons (1) Below table indicated for information about the functional button operations. Button Measuring Operation Performed Function Continuity Turn the continuity buzzer on and Test off in resistance measurement mode. At OFF Press while turning on the... - Page 11 Model UT70C: OPERATING MANUAL Functional Buttons (2) HOLD Any rotary Press HOLD to enter and exit the switch Hold mode in any mode; the position Meter beeps. Conductance Press HOLD to toggle between mode conductance and resistance value. Present resistance value is kept.
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Page 12: Display Symbols
Model UT70C: OPERATING MANUAL Display Symbols (1) (see figure 2) (figure 2) Symbol Meaning The Meter is in the auto range mode in which the Meter automatically selects the range with the best resolution. The battery is low. Warning: To avoid false readings,... - Page 13 Model UT70C: OPERATING MANUAL Display Symbols (2) Ohm. The unit of resistance. kilohm. 1 x 10 or 1000 ohms. k , M Megohm. 1 x 10 or 1,000,000 ohms. Hz, kHz, Hertz. The unit of frequency. kHz: Kilohertz. 1 x 10 or 1000 hertz.
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Page 14: Measurement Ranges
Model UT70C: OPERATING MANUAL Measurement Ranges (1) A measurement range determines the highest value the Meter can measure. Most Meter functions have more than one range. See "Accuracy Specifications." A. Selecting a Measurement Range Being in the right measurement range is important: l If the range is too low for the input, the Meter displays to indicate an overload. - Page 15 Model UT70C: OPERATING MANUAL Measurement Ranges (2) Press RANGE. The Meter enters the manual range mode and turns off. Each presses of RANGE increments the range. When the highest range is reached, the Meter wraps to the lowest range. To exit the manual range mode, press and hold RANGE for over one second.
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Page 16: Measurement Operation
Model UT70C: OPERATING MANUAL Measurement Operation (1) A. AC Voltage Measurement (see figure 3) black (figure 3) Warning To avoid harms to you or damages to the Meter from electric shock, please do not attempt to measure voltages higher than 1000V / 750V rms although readings may be obtained. -
Page 17: Dc Voltage Measurement
Model UT70C: OPERATING MANUAL Measurement Operation (2) B. DC Voltage Measurement (see figure 4) black (figure 4) Warning To avoid harms to you or damages to the Meter from electric shock, please do not attempt to measure voltages higher than 1000V / 750V rms although readings may be obtained. -
Page 18: Dc Milivolt Measurement
Model UT70C: OPERATING MANUAL Measurement Operation (3) Measurement C. DC Millivolt (see figure 5) black (figure 5) Warning To avoid harms to you or damages to the Meter from electric shock, please do not attempt to measure voltages higher than 1000V / 750V rms although readings may be obtained. -
Page 19: Measuring Continuity, Resistance, Conductance & Capacitance
Model UT70C: OPERATING MANUAL Measurement Operation (4) Measuring Continuity, Resistance, Conductance & Capacitance 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, resistance, conductance and capacitance. - Page 20 Model UT70C: OPERATING MANUAL Measurement Operation (5) Resistance Measurement (see figure 7) Select W Test black (figure 7) The resistance ranges are: 800.0 , 8.000k , 80.00k , 800.0k , 8.000M and 80.00M . To measure resistance, connect the Meter as follows:...
- Page 21 Model UT70C: OPERATING MANUAL Measurement Operation (6) l The LCD displays indicating open-circuit for the tested resistor or the resistor value is higher than the maximum range of the Meter. l When resistance measurement has been completed, disconnect the connection between the testing leads and the circuit under test.
- Page 22 Model UT70C: OPERATING MANUAL Measurement Operation (7) Capacitance Measurement (see figure 9) Select nF Test black (figure 9) The Meter's capacitance ranges are: 1.000nF, 10.00nF, 100.0nF, 1.000 F, 10.00 F and 100.0 F. To measure capacitance, connect the Meter as follows:...
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Page 23: Testing Diodes
Model UT70C: OPERATING MANUAL Measurement Operation (8) Testing Diodes (see figure 10) black (figure 10) Warning To avoid possible damage to the Meter and to the device under test, disconnect circuit power and discharge all high-voltage capacitors before testing diodes. -
Page 24: Dc Or Ac Current Measurement
Model UT70C: OPERATING MANUAL Measurement Operation (9) Note In a circuit, a good diode should still produce a forward voltage drop reading of 0.5V to 0.8V; however, the reverse voltage drop reading can vary depending on the resistance of other pathways between the probe tips. - Page 25 Model UT70C: OPERATING MANUAL Measurement Operation (10) The current measurement has 2 measurement positions on the rotary switch: A and mA The A has a 8.000A and 10.00A range, with auto ranging; the mA has a 80.00mA and 800.0mA range, with auto ranging.
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Page 26: Frequency & Duty Cycle Measurement
Model UT70C: OPERATING MANUAL Measurement Operation (11) G. Frequency & Duty Cycle Measurement (see figure 12) Select Hz or Duty Cycle Test black (figure 12) Frequency Measurement The measurement ranges are: 1kHz, 10kHz, 100kHz and 1MHz. The maximum measurement range is 1MHz. - Page 27 Model UT70C: OPERATING MANUAL Measurement Operation (12) Duty Cycle Measurement The duty cycle measurement range is 0.01% ~ 99.99%. To measure duty cycle: Set up the Meter to measure frequency. To select duty cycle, press Hz again (or until the % symbol is shown on the display).
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Page 28: Max Min Recording Mode
Model UT70C: OPERATING MANUAL MAX MIN Recording Mode (1) (see figure 13) Select MAX, MIN, AVG or Present value black (figure 13) MAX MIN recording mode applies to all measurement functions except at conductance measurement function. MAX MIN recording mode captures and stores the maximum and minimum input value detected, and calculates a running average of all readings taken. - Page 29 Model UT70C: OPERATING MANUAL MAX MIN Recording Mode (2) MAX MIN Action Function To enter the Make sure that the Meter is in the MAX MIN desired measurement function and mode. range. Press MAX MIN to enter MAX MIN recording mode. The present...
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Page 30: Peak Max Min Mode
Model UT70C: OPERATING MANUAL PEAK MAX MIN Mode (see figure 14) Select MAX or MIN Select 1ms response time black (figure 14) PEAK MAX MIN mode is an additional function of Pressing to toggle between 100ms response time and 1ms response time. This function can only be enabled... -
Page 31: Operation Of Hold Mode
Model UT70C: OPERATING MANUAL Operation of Hold Mode Warning To avoid possibility of electric shock, do not use Hold mode to determine if circuits are without power. The Hold mode will not capture unstable or noisy readings. The Hold mode is applicable to all measurement functions. -
Page 32: Operation Of Auto Hold Mode
Model UT70C: OPERATING MANUAL Operation of Auto Hold Mode Auto Hold means you no need to press HOLD, the readings on the LCD will be hold automatically. Conditions to enter Auto Hold Mode: When input signal is larger than AC/DC 100mV, Auto Hold mode will be enabled automatically. -
Page 33: The Use Of Relative Value And Relative Percentage Value Mode
Model UT70C: OPERATING MANUAL The Use of Relative Value and Relative Percentage Value Mode The and % mode applies to all measurement functions, with auto ranging. REL mode can be used together with Auto Hold and MAX MIN mode. The definition is as follows: l Relative value ( ) = present value - stored value For instance, if the stored value is 20.0V and the... -
Page 34: Turning On The Display Backlight
Model UT70C: OPERATING MANUAL Turning on the Display Backlight Warning In order to avoid the hazard arising from mistaken readings in insufficient light or poor vision, please use the Display Backlight function. l Press to turn on the Display Backlight and it will automatically off after about 60 seconds. -
Page 35: Full Icons Display
Model UT70C: OPERATING MANUAL Full Icons Display If the Meter is turned on with any functional button being pressed on, the LCD will display all the icons and maintain this mode until the button is released 3 seconds later. Sleep Mode... -
Page 36: General Specifications
Model UT70C: OPERATING MANUAL General Specifications l Maximum Voltage between :1000V rms. any Terminals and Grounding :1A,250V fast type glass fuse, 5x20mm. :10A,250V fast type glass fuse, 5x20mm. :8000, updates 5 times Maximum Display /second. :Operating:5 C~40 Temperature F ~104... -
Page 37: Accuracy Specifications
Model UT70C: OPERATING MANUAL Accuracy Specifications (1) Accuracy: (a% reading + b digits), guarantee for 1 year. Operating temperature: 23 Relative humidity: <80%. Temperature coefficient: 0.1 x (specified accuracy) / 1 A. AC Voltage Accuracy Range Resolution 50Hz~60Hz 40Hz~400Hz (1.5%+4) -
Page 38: Continuity, Resistance & Conductance Test
Model UT70C: OPERATING MANUAL Accuracy Specifications (2) C. Continuity, Resistance & Conductance Test Overload Range Resolution Accuracy Protection Continuity Test Approximate (800.0 ) (0.5%+3) (0.5%+1) 800k 500V rms (2%+3) Conductance Test 0.01nS (2%+10) (80nS) Remarks: l Continuity Test (800.0 ): Buzzer beeps continuously. -
Page 39: Dc Current
Model UT70C: OPERATING MANUAL Accuracy Specifications (3) DC Current Overload Range Resolution Accuracy Protection 1A,250V fast type 80mA 10 A glass fuse, 5x20mm. 800mA 100 A (0.3%+2) 10A,250V fast type glass fuse, 5x20mm. 10mA Remark: l At 8A & 10A Range:... -
Page 40: Frequency & Duty Cycle
Model UT70C: OPERATING MANUAL Accuracy Specifications (4) H. Frequency & Duty Cycle Frequency - At mV Range Overload Range Resolution Accuracy Protection 1kHz 0.01Hz 10kHz 0.1Hz (0.02%+1) 500V rms 100kHz 1MHz 10Hz Remarks: Input sensitivity as follows: <100kHz: 100mV rms;... -
Page 41: Maintenance
Model UT70C: OPERATING MANUAL Accuracy Specifications (5) Remarks: Reading is only for reference purpose. At mV 8V Range: Positive pulse width 30 s. Maintenance (1) This section provides basic maintenance information including battery and fuse 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 42: Testing The Fuses
Model UT70C: OPERATING MANUAL Maintenance (2) B. Testing the Fuses Warning To avoid electrical shock or personal injury, remove the test leads and any input signals before replacing the battery or fuse. To prevent damage or injury, install ONLY replacement fuses with identical amperage, voltage, and speed ratings. -
Page 43: Replacing The Battery
Model UT70C: OPERATING MANUAL Maintenance (3) C. Replacing the Battery (see figure 15) Holster The Meter (figure 15) Warning To avoid false readings, which could lead to possible electric shock or personal injury, replace the battery as soon as the battery indicator "... -
Page 44: Replacing The Fuses
Model UT70C: OPERATING MANUAL Maintenance (4) D. Replacing the Fuses (see figure 15) Warning To avoid electrical shock or arc blast, or personal injury or damage to the Meter, use specified fuses ONLY in accordance with the following procedure. To replace the Meter's fuse: Turn the Meter to OFF position and remove all connections from the terminals. -
Page 45: Rs232C Serial Port
Model UT70C: OPERATING MANUAL RS232C Serial Port (1) A. RS232C Port Cable Computer Meter D-sub D-sub D-sub 9 Pin 25 Pin Remark 9 Pin Male Name Female Female Receiving Data Transmitting Data Data Terminal Ready Grounding Data Set Ready Request to Send... -
Page 46: System Requirements For Installing The Ut70C Interface Program
RS232C Serial Port (2) System Requirements for Installing the UT70C Interface Program To use UT70C Interface Program, you need the following hardware and software: An IBM PC or equivalent computer with 80586 or higher processor and 640 x 480 pixel or better monitor. - Page 47 Model UT70C: OPERATING MANUAL...
- Page 48 Model UT70C: OPERATING MANUAL Copyright 2001 Uni-Trend International Limited. All rights reserved. Manufacturer: UNI-TREND TECHNOLOGY(DONG GUAN)LIMITED Address: Dong Fang Da Dao, Bei Shan Dong Fang Industrial Development District, Hu Men Town, Dong Guan City, Guang Dong Province, China Headquarters: Uni-Trend International Limited...