UNI-T UT57 Operating Manual Download Page 8

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2-7 Frequency

Range

Resolution

Accuracy

20kHz 1Hz

(1.0% +20)

200kHz 10Hz

Input sensitivity: 200mV rms,

Max Input Scope: 30V rms.
Overload protection: 230V rms

2-8 Diode and Continuity Beeper

Range

Remark

Measuring Condition

Display Diode
Forward Voltage
Value, unit is "V"

Forward DC Current abt
1mA, Backward DC
Voltage abt2.8V

Beeper sounds when
Resistance < 30

Ω

Display the nearest
value, unit is "k

Ω

Voltage at open Circuit
abt 3.0V

Overload protection: 230V DC or AC RMS.

Model UT57: OPERATING MANUAL

Summary of Contents for UT57

Page 1: ...liable hand held measuring instrument The design of the Meter is the use of CMOS technology with large scale of integrated circuit using double integrated A D tranducer as its core and has full ranges overload protection The Meter can measure DC current AC current DC Voltage AC Voltage Resistance Capacitance Diode Frequency and Continuity Beeper AC Voltage and Current measurement is TRMS and has t...

Page 2: ...efore the cabinet has been closed and screwed safely as terminal can carry voltage l Make sure the Meter is set to the suitable range before each measurement l Before using the Meter please inspect the case and test leads for damaged insulation or exposed metal l Connect the red and black test lead to the correct measuring input jack properly l Do not input values over the maximum range of each me...

Page 3: ...adings that can lead to electric shock and personal injury l Turn off the Meter once finished measuring l Do not operate the Meter under adverse environmental condition including high temperature and especially humid area as the Meter s function may be effected after moisturizing l To avoid damages and dangers do not change the circuit l Periodically wipe the cabinet with a damp cloth and mid dete...

Page 4: ...re 10 o C to 50 o C 14 o F to 122 o F l Altitude Operation 2000m Storage 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 Battery type 9V Zinc NEDA1604 or 6F22 or 006P l Fuse F 0 3A 250Vφ5x20mm F 10A 250Vφ6x25mm l Measuring Dangerous Voltage display l Strap for easy carry l Dimension 190 x...

Page 5: ...3o C 5o C with relative humidity at 75 Accuracy specifications take the form of a readings n digits B 1 Direct Current Voltage DC Voltage B 2 Alternate Current Voltage AC Voltage 200mV 2V 20V 200V 750V 10µV 100µV 1mV 10mV 100mV Range Resolution 0 8 20 Accuracy 1 0 50 Model UT57 OPERATING MANUAL 5 ...

Page 6: ...B 3 Direct Current Current DC Current B 4 Alternate Current Current AC Current Model UT57 OPERATING MANUAL 6 ...

Page 7: ...n Circuit About 3V Caution At 200Ω range short the test lead first to obtain the resistance value of the test leads Deduct the resistance value from the measured reading to obtain the correct value of the object being measured B 6 Capacitance 20nF 200nF 2µF 20µF 1pF 10pF 0 1nF 1nf Range Resolution Accuracy 2 0 10 2 5 30 Testing Signals About 400Hz 40mVrms Model UT57 OPERATING MANUAL ...

Page 8: ...0V rms 2 8 Diode and Continuity Beeper Range Remark Measuring Condition Display Diode Forward Voltage Value unit is V Forward DC Current abt 1mA Backward DC Voltage abt2 8V Beeper sounds when Resistance 30Ω Display the nearest value unit is kΩ Voltage at open Circuit abt 3 0V Overload protection 230V DC or AC RMS Model UT57 OPERATING MANUAL 8 ...

Page 9: ...and this is dangerous to life 3 Become familiar with all buttons and Turn the rotary switch to proper range before operating 4 Put the On Off button at position as do not measure AC current or voltage otherwise The LCD will appear AC symbol 1 LCD Display 2 On Off Button 3 On Off Button 4 Rotary Switch 5 COM Input Jack 6 Capacitance Jack 7 Power On Off Button 8 Data Hold Button 9 200mA 10A lnput Ja...

Page 10: ...actory reading is obtained 2 If 1 is shown on the LCD it means the Meter is overloaded then set the measuring range to higher 3 means never exceed the maximum input limits 1000V otherwise internal circuit of the Meter will be damaged even though it is still possible to display higher voltage value 4 Take extra care of voltage leakage when measuring high voltage C 2 Measuring AC Voltage 1 Press dow...

Page 11: ... selected ranges to fulfill accuracy requirement C 3 Measuring DC Current 1 Press button down not to display AC on the LCD 2 Connect the black test lead to COM jack When measuring 200mA or below connect the red test lead to mA jack When measuring 10A or below connect the red test lead to 10A jack 3 Set the rotary switch to A 4 Connect the test leads in series with the object to be measured the LCD...

Page 12: ...d Alternate Current While has been pressed down it means the measuring value is a pure alternate current effective value TRMS 2 Connect the black test lead to COM jack When measuring 200mA or below connect the red test lead to mA jack When measuring 10A or below connect the red test lead to 10A jack 3 Set the rotary switch to A 4 Connect the test leads in series with the object to be measured Caut...

Page 13: ... objects circuit and components to be measured are without voltage and discharge all high voltage capacitors C 6 Measuring Capacitance 1 Input the being measured capacitor to the capacitance jack not require test lead 2 Before measuring capacitance remember it takes time for zeroing when changing ranges Floating reading does not effect accuracy Caution 1 To avoid damage of the Meter or the equipme...

Page 14: ... Measuring Diode and Continuity beeper 1 Connect the black test lead to COM jack and red test lead to VΩ jack Red test lead polarity is 2 Set the rotary switch to 3 Connect the test lead across with the object being measured The reading is Diode Forward Voltage Drop Nearest Value 4 Connect the test lead to object s two points being measured the beeper sounds if the resistant value between the two ...

Page 15: ...he circuit of your Meter Take a note of the following few points 1 Do not connect to DC Voltage above 1000V or AC Effective Value Voltage above 750V 2 Do not input voltage when the rotary switch is in Current Range Ω 3 Do not operate the Meter if battery is not inside the Meter or bottom cabinet is not securely screwed 4 Disconnect the test leads and power off the Meter before replacing the Batter...

Page 16: ...d see diagram 2 3 Set holster in a large angle on the table tilt it up by all two parts of tilt stand see diagram 2 G Using Strap 1 Put the front end of the strap through the round metal of the Meter see diagram 1 2 Put the bottom end of the strap through the front part and tide it up see diagram 2 figure1 figure2 figure3 END The manual is subject to changes without separate notice Model UT57 OPER...

Page 17: ...Development 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 UT57 OPERATING MANUAL 17 ...

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