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Model UT231: OPERATING MANUAL

Figure 4

Measurement Operation

Press and hold

POWER

for one second to turn the

Meter on. The default range is the last measurement
range when you turned off the Meter.
Replace the battery as soon as the battery indicator
“ ” appears on the display.

A. AC Voltage (main display) + Frequency
(secondary display) Measurement

(see figure 4)

Brack

Red

Circuit

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Содержание UT231

Страница 1: ...P N 41451518 UT231 Digital Power Clamp Meter Operating Manual ...

Страница 2: ...Model UT231 OPERATING MANUAL ...

Страница 3: ... Bottom Structure Functional Buttons Display Symbols Measurement Operation A AC Voltage Frequency Measurement B AC Current AC Voltage Measurement C Active Power Phase Angle Measurement D Apparent Power Reactive Power Measurement E Power Factor Phase Angle Measurement F Active Energy Time Measurement G Temperature Temperature Measurement True RMS Measurement and Average Value Measurement 3 3 4 4 6 ...

Страница 4: ...and Three Phases Three Wires Measurement Method Specifications A General Specifications B Environmental Requirements Accuracy Specifications A AC Voltage B Frequency C AC Current D Active Power E Apparent Power F Reactive Power G Power Factor H Phase Angle I Active Energy J Temperature Maintenance A General Service B Replacing the Battery ...

Страница 5: ...ital current meter and also power measurement meter The Meter can measure Voltage Current Active Power Apparent Power Reactive Power Power Factor Phase Angle Frequency Active Energy Temperature and etc Warning Open the package case and take out the Meter Check the following items carefully to see any missing or damaged part Unpacking Inspection Item 1 2 3 4 5 6 7 8 Description English Operating Ma...

Страница 6: ... Note identifies the information that user should pay attention to International electrical symbols used on the Meter and in this Operating Manual are explained on page 6 Rules For Safe Operation 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 Warning Before using the Meter inspect the case D...

Страница 7: ...test leads keep your fingers behind the finger guards Replace the battery as soon as the battery indicator appears With a low battery the Meter might produce false readings that can lead to electric shock and personal injury When opening the battery door must make sure the Meter is power off When servicing the Meter use only the same model number or identical electrical specifications replacement ...

Страница 8: ...ter Face View see figure 1 Figure 1 Brack Red International Electrical Symbols AC Alternating Current Grounding Double Insulated Warning Refer to the Operating Manual Deficiency of Built In Battery Danger of High Voltage Conforms to Standards of European Union ...

Страница 9: ...ching the dangerous area Power button Max button MENU button LOAD button recall data CLEAR button clear the stored reading MIN button 9 10 11 12 13 14 15 16 17 18 19 20 21 Temperature negative Input Terminal Temperature positive Input Terminal V Voltage Input Terminal COM Input Terminal MAX MIN button CAL calibration button SAVE button data store button USB button LIGHT button auto display backlig...

Страница 10: ...ess and hold POWER for 1 second to turn the Meter on Press POWER again to turn the Meter off Press HOLD to enter the Hold mode in any mode appears and the Meter beeps Press HOLD again to exit the Hold mode to return to measurement mode the Meter beeps and disappears Press LIGHT to turn the display backlight on The display backlight will be off automatically after 30 seconds Button POWER HOLD LIGHT...

Страница 11: ...howing the index increase one Press USB once to turn the USB Button MENU Operation Performed interface on USB appears and the Meter beeps Press USB again to turn the USB interface off USB disappears and the Meter beeps It is invalid at active energy mode Press once to enter LOAD mode MR appears and the Meter beeps Press again to exit LOAD mode MR disappears and the Meter beeps Press and hold LOAD ...

Страница 12: ... At all other ranges press to clear stored readings Press once at LOAD mode MR icon shown the Meter displays the previous stored reading the left secondary display showing the index decrease one MAX MIN Starts recording of maximum and minimum vales Press to step through maximum high minimum low and the current AC voltage True RMS value Operation Performed Button MAX MIN at any mode except at the f...

Страница 13: ...easurement Unit for hour Unit for minute Unit for second The battery is low Warning To avoid false readings which could lead to possible electric shock or personal injury replace the battery as soon as the battery indicator appears Number 1 2 3 4 5 6 7 8 Symbol USB DC h mm s Hz PG KVAr Symbol of Unit Hz Hertz The unit of frequency PG The unit of phase angle KVAr The unit of reactive power Minimum ...

Страница 14: ...ar the stored reading Ruler negative symbol High voltage symbol Indicates negative reading Indicator for AC voltage or current Indicator for recall the stored reading Frequency symbol Number 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Meaning Indicator for data store Indicator for data stored is full Number 23 24 Symbol MIN MAX TEMP CAL CLR AC MR FREQ Symbol MEM FUL ...

Страница 15: ...for one second to turn the Meter on The default range is the last measurement range when you turned off the Meter Replace the battery as soon as the battery indicator appears on the display A AC Voltage main display Frequency secondary display Measurement see figure 4 Brack Red Circuit ...

Страница 16: ...Frequency secondary display range and connect the two test leads to the object being measured The double display shows the AC voltage True RMS value and the frequency value 1 2 3 Press MAX MIN again to show the present AC voltage True RMS value The display shows OL when the input voltage is higher than 600V r m s 6 7 When the measurement has been completed disconnect the connection between the tes...

Страница 17: ...lay range Press the lever to open the transformer jaw Center the tested 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 otherwise it will casue deviation The Meter can only measure one conductor at a time to meausre more than one condutor at a time w...

Страница 18: ...s MIN it starts recording the minimum AC current True RMS value Press MAX MIN again to show the present AC current True RMS value The display shows OL when the current of the tested conductor is higher than 1000A rms 6 7 8 When the measurement has been completed disconnect the connection between the conductor under test and the jaw and remove the conductor away from the transformer jaw of the Mete...

Страница 19: ...terminal and black test lead to COM input terminal and connect them to tbe live wire and neutrual wire of the tested circuit 1 2 3 The double display shows the active power kW value and the PG value of the measured object The maximum active power kW measuring range is 600kW OL will be displayed when it is over than that Press MAX MIN once the LCD displays MAX it starts recording the maximum active...

Страница 20: ...n display Reactive power secondary display range Press the lever to open the transformer jaw and clamp them to the power source or the tested conductor Insert the red test lead to V input terminal and black test lead to COM input terminal and connect them to tbe live wire and neutrual wire of the tested circuit The double display shows the apparent power kVA value and the reactive power KVAr value...

Страница 21: ...he minimum apparent power value Press MAX MIN again to show the present apparent power value 7 8 When testing has been completed disconnect the connection between the testing leads and the circuit under test and remove testing leads from the input terminals Note E Power Factor main display Phase Angle secondary display Measurement see figure 8 Brack Red ...

Страница 22: ...uctor Insert the red test lead to V input terminal and black test lead to COM input terminal and connect them to tbe live wire and neutrual wire of the tested circuit The double display shows the power factor value and the phase angle value of the measured object When the power factor value is negative it means the loading is capacItive When the power factor value is positive it means the loading ...

Страница 23: ... Power factor main display Phase angle secondary display range Press the lever to open the transformer jaw and clamp them to the power source or the tested conductor Insert the red test lead to V input terminal and black test lead to COM input terminal and connect them to tbe live wire and neutrual wire of the tested circuit The double display shows the active energy value and the measuring time v...

Страница 24: ... time is over 24 hours or the Meter is switched to other measuring ranges active energy measuring will stop The maximum readinng of acitve energy is 9999kWh OL will be displayed when the reading is over than that MAX and MIN are not valid when measuring active energy Press CLEAR to reset the time 5 6 When testing has been completed disconnect the connection between the testing leads and the circui...

Страница 25: ...ain display Phase angle secondary display range Inser the temperature probe positve to the TEMP input terminal and negative to the TEMP input terminal and connect it to the mesaured object The double display shows the present degree celsius value on the main display and the fahrenheit value on the secondardy display 1 2 3 When testing has been completed disconnect the connection between the temper...

Страница 26: ... the total distortion Below table 1 shows the waveform coefficient and the relationship and the requested changing factor of sine wave square wave pulse rectangle wave sawtooth triangle wave RMS value and average value Input Wave PK PK 0 PK RMS AVG Sine PK 0 PK PK sine commute whole wave PK 0 PK PK sine commute half wave PK 0 PK PK square wave PK 0 PK PK commuted square wave PK 0 PK PK pulse recta...

Страница 27: ...tive power active energy and active power measurement methods are the same Power factor value can be obtained directly from each phase power factor testing Thee phases total power factor is equal to three phases total active power value divided by three phases total apparent power value Under three phases three wires balance load situation its total watt can be directly by measuring its voltage of...

Страница 28: ...cklight White colour Computer connection USB Calibration Feature Sleep Mode To preserve battery life the Meter automatically turns off if you do not turn press any button for around 15 minutes except at active energy range Analogue Bar Graph Sampling 3 times per second Max Jaw Size 55mm diameter Power 4 x 1 5V battery LR6 Dimensions 303mm x 112mm x 39mm Weight Approximate 601g B Environmental Requ...

Страница 29: ...s guarantee for 1 year Operating temperature 23 5 Operating humidity 45 75 R H A AC Voltage True RMS Range 15V 100V 300V Resolution 0 1V Accuracy 1 2 5 Allowable Maximum overload protection voltage 600 RMS B Frequency Precision 1Hz Accuracy 0 5 5 Range 20Hz 500Hz Input Impedance 10M ...

Страница 30: ...x A x COS Φ Voltage Current Voltage Range 15V 0 60kW 1 50kW 6 00kW 15 00kW 100V 4 00kW 10 00kW 40 00kW 100 0kW 300V 12 00kW 30 00kW 120 0kW 300 0kW 600V 24 00kW 60 00kW 240 0kW 600 0kW 3 5 100kW 0 01kW 100kW 0 1kW Current Range Precision Defend Rate 40A 100A 400A 1000A Remarks Allowable maximum overload protection voltage 600V RMS Allowable maximum overload protection current 1000A RMS ...

Страница 31: ...0kVA 40 00kVA 100 0kVA 300V 12 00kVA 30 00kVA 120 0kVA 300 0kVA 600V 24 00kVA 60 00kVA 240 0kVA 600 0kVA 3 5 1000kVA 0 01kVA 100kVA 0 1kVA Current Range Accuracy Resolution 40A 100A 400A 1000A Remarks Allowable maximum overload protection voltage 600V RMS Allowable maximum overload protection current 1000A RMS Voltage Current ...

Страница 32: ...0kVar 40 00kVar 100 0kVar 300V 12 00kVar 30 00kVar 120 0kVar 300 0kVar 600V 24 00kVar 60 00kVar 240 0kVar 600 0kVar 4 5 1000kVar 0 01kVar 100kVar 0 1kVar Current Range Accuracy Resolution 40A 100A 400A 1000A Remarks Allowable maximum overload protection voltage 600V RMS Allowable maximum overload protection current 1000A RMS Voltage Current ...

Страница 33: ...ng current less than 10A OR Measuring voltage less than 45V Remarks Allowable maximum overload protection voltage 600V RMS Allowable maximum overload protection current 1000A RMS H Phase Angle PG acos PF Accuracy 1 o Resolution 1 o Measuring Condition The minimum measuring current 10A The minimum measuring voltage 45V Measuring current less than 10A OR Measuring voltage less than 45V For reference...

Страница 34: ...e 1 9999kWh Accuracy 3 2 Resolution 0 001kWh Remarks Allowable maximum overload protection voltage 600V RMS Allowable maximum overload protection current 1000A RMS K Temperature TEMP Range 50 0 0 1300 58 32 32 2372 Accuracy 1 10 1 5 1 18 1 11 Resolution 1 1 ...

Страница 35: ...trical 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 terminals with cotton bar with detergent as dirt or moisture in the terminals can affect readings Turn the Meter power off when it is not in use Take out the battery when it is not using for a long time ...

Страница 36: ...e tests leads are disconected from the circuit being tested before opening the case bottom To replace the battery Press POWER to turn the Meter off and remove all the connections from the input terminals Turn the Meter s front case down Remove the screw from the battery door and separate the battery door from the case bottom Take out the old battery and replace with 4 x 1 5V battery LR6 Rejoin the...

Страница 37: ...Model UT231 OPERATING MANUAL 35 This operating manual is subject to change without notice END ...

Страница 38: ...Limited Dong Fang Da Dao Bei Shan Dong Fang Industrial Development District Hu Men Town Dongguan City Guang Dong Province China Postal Code 523 925 Headquarters Uni Trend Group Limited 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 ...

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