UNI-T UT-50 Series, Operating Manual

Page 1: ...it with steady function and highly reliable hand held 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 DC current AC current DC Voltage AC Voltage Resistance Capacitance Diode Temperature Frequency and Continuity which is an ideal tool for users Model UT51 55 OPERATING...

Page 2: ...tion degree 2 overvoltage category CAT I 1000V and CAT II 600V and double insulation Use the Meter only as specified in this manual otherwise the protection provided by the Meter may be impaired l CAT I For signal level telecommunication electronic with small transient over voltage l CAT II For local level appliances main wall outlets portable equipment l The meter is designed to withstand the sta...

Page 3: ... not change the circuit l Periodically wipe the case with a damp cloth and mild detergent Do not use abrasives or solvents l International Electrical Symbols Low Battery Earth Ground Safety Rules Double Insulated AC Diode Dangerous Voltages DC Buzzer Fuse l Make sure to use new fuses with proper rating in stead of bad fuses l To avoid electric shock or damages do not apply more than 1000V between ...

Page 4: ...0 F to 122 0 F l Altitude Operating 2000m Storing 10000m l Relative Humidity Max relative humidity 80 for temperature up to 31 o C decreasing linearly to 50 relative humidity at 40 o C l Low Battery display l Strap for easy carry l Tilt stand design three observation angles is in favor of reading display l Dimension 190mm x 88mm x 34mm l Weight Meter only excluding test leads about 270g Meter hols...

Page 5: ...other ranges is 750Vrms or 1000Vp p B 2 Alternating Current Voltage AC Voltage Input impedance All ranges are 10MΩ Frequency 40Hz 400Hz Overload protection 200mV is 250VDC or AC RMS All other ranges is 750Vrms or 1000Vp p Display Average Value RMS of Sine Wave 200mV 2V 20V 200V 1000V 100µV 1mV 10mV 100mV 1V Range Resolution 0 5 1 UT51 UT 52 UT53 UT54 UT55 Accuracy 0 8 2 200mV 2V 20V 200V 750V 100µ...

Page 6: ...fuse φ5x20mm at 10A range For UT52 53 54 55 315mA 250V fast acting fuse φ5x20mm No fuse at 20A range Max current input For UT51 10A The measurement time for high current should be less than 10 seconds maximum and the interval time between two measurements should be greater than 15 minutes For UT52 53 54 55 20A The measurement time for high current should be less than 15 seconds maximum and the int...

Page 7: ...315mA 250V fast acting fuse φ5x20mm No fuse at 20A range Max current input For UT51 10A The measurement time for high current should be less than 10 seconds maximum and the interval time between two measurements should be greater than 15 minutes For UT52 53 54 55 20A The measurement time for high current should be less than 15 seconds maximum and the interval time between two measurements should b...

Page 8: ...51 UT 52 UT53 UT54 UT55 Accuracy 0 8 1 0 8 3 1 2 5 10 10 B 7 Frequency Range Resolution UT51 Accuracy UT52 UT54 UT55 UT53 2kHz 20kHz 1Hz 10Hz 2 5 1 5 5 Voltage at open circuit 700mV 200MΩ range open circuit voltage around 3V Overload protection All ranges 250VDC or AC RMS Caution At 200MΩ range as test lead is short circuit the LCD display 10 digits is normal deduct the 10 digits from the measured...

Page 9: ...inuity Beeper Comment Measuring Condition Range Display diode forward voltage near value Unit mV Forward DC current abt 1mABackward DC voltage abt 2 8V Voltage at open circuit abt 2 8V B 8 Temperature Range Resolution Accuracy UT51 52 53 UT53 UT55 5 3 1 3 2 20 o C to 1000 o C 1 o C 20 o C to 0 o C 0 o C to 400 o C 400 o Cto 1000 o C Input sensitivity 100mVrms Overload protection 250Vrms Model UT51...

Page 10: ...C Making Measurements 1 On Off Switch 2 Capacitance jack 3 Liquid Crystal Display 4 Temperature jack 5 Rotary switch 6 Transistor jack 7 Input jack Model UT51 55 OPERATING MANUAL 10 ...

Page 11: ...Caution Caution Model UT51 55 OPERATING MANUAL 11 ...

Page 12: ... Caution 1 Please refer to DC Current Caution 1 2 3 Caution Model UT51 55 OPERATING MANUAL 12 ...

Page 13: ... reading does not effect accuracy 1 To avoid damage of the Meter or the equipment under testing disconnect circuit powers and discharge capacitors before measuring capacitance 2 Connect capacitor to the capacitance jack 3 Stabilizing reading takes some time when measuring high capacitance 4 Unit 1pF 10 6 µF 1nF 10 3 µF Model UT51 55 OPERATING MANUAL 13 ...

Page 14: ...C 7 Measuring Frequency Model UT51 55 OPERATING MANUAL 14 ...

Page 15: ...15 D Maintenance I General Service Model UT51 55 OPERATING MANUAL ...

Page 16: ...the following procedure To replace the Meter s fuse 1 Disconnect the connection between the testing leads and the circuit under test and remove the testing leads away from the input terminals of the Meter 2 Turn the Meter power OFF 3 Remove the rubber feet and screws from the case bottom and separate the case bottom from the case top 4 Remove the fuse by gently prying one end loose and then take o...

Page 17: ...ll two parts of tilt stand see diagram 3 figure1 figure2 figure3 E Accessories 1 A book of users manual 2 A pair of test lead 3 A pair of WRN 01B bread temperature probe for UT53 and UT55 ONLY 4 A piece of holster if selected 17 UT52 53 54 55 315mA 250V fast acting fuse φ 5x20mm 6 Rejoin the case bottom and the case top and install the screw and rubber feet Replacement of fuses is seldom required ...

Page 18: ...tice G Using Strap 1 Put the front end of the strap through the round metal of the Meter see part 1 of the below diagram 2 Put the bottom end of the strap through the front part and tide it up see part 2 of the below diagram Model UT51 55 OPERATING MANUAL 18 ...

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Page 20: ...velopment District Hu Men Town Dong Guan City Guang Dong Province China Headquarters Uni Trend International Limited Address Rm901 9 F Nanyang Plaza 57 Hung To Road Kwun Tong Kowloon Hong Kong Tel 852 2950 9168 Fax 852 2950 9303 Email info uni trend com http www uni trend com Model UT51 55 OPERATING MANUAL 20 ...