UNI-T UT208A, Operating Manual

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Page 2: ...bols 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...

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 Batter...

Page 4: ...lamp 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 larg...

Page 5: ...ish 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 tha...

Page 6: ...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...

Page 7: ...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 th...

Page 8: ...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 deteriora...

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 of...

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 E...

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 A...

Page 12: ...play 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 se...

Page 13: ...sonal 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 temperat...

Page 14: ...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 o...

Page 15: ...nt 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...

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 Hz 40A 400A 1000A Rotary Switch Functional Buttons...

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 freque...

Page 19: ...t 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 measuri...

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 1 to 0 3 of error to resistance measurement To obtain precision readi...

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 Co...

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

Page 23: ...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 test...

Page 24: ...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 t...

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

Page 26: ...the red test lead into the V Hz 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...

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 ot...

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

Page 30: ...ont 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 re...

Page 31: ...dings 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 si...

Page 32: ...hows 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 b...

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

Page 34: ...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 te...

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

Page 36: ...aured 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...

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 hu...

Page 38: ...arantee 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...

Page 39: ...ut Impedance 10M 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 wav...

Page 40: ...000V AC750V 400k 0 1K 4M 0 001M 1 2 2 40M 0 01M 1 5 2 D Continuity Test Range Resolution Accuracy Overload Protection 0 1 Around 10 the buzzer beeps DC1000V Open circuit voltage approx 0 4V AC750V Rem...

Page 41: ...n 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 Re...

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 Frequ...

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

Page 44: ...ctrical 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 te...

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 indicat...

Page 46: ...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...

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