Uni-Trend UT231 multimeter
Contents
1. Note 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 Meter te 0095 nnn j LILI in 80 100 Figure 6 16 Model UT231 OPERATING MANUAL The active power ranges are 40A 100A 400A and 1000A The phase angle ranges are 0 360 A Warning To avoid damages to the Meter or harms to you do you measure higher than AC voltage 600 v r s and AC current 10004 v r s To measure active power phase angle connect the Meter as follows 1 2 Press the MENU to select Active power 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 4 The double display shows the active power kW value and the PG value of the measured object 5 The maximum active power kW measuring range is 600kW OL will be displayed when it is over than that 6 Press MAX MIN once the LCD displays MAX it starts recording the maximum active power value 7 Press MAX MIN again the LCD displays MIN it starts recording the minimum active power value 8 Press MAX MIN again to show the2. Infrared Interface BO USB Communication Interface Cable MENU Press MENU to display the following functions in sequence Model UT231 OPERATING MANUAL Button Operation Performed Button Operation Performed MENU AC Voltage main display Frequency USB interface on USB appears and the Meter secondary display beeps e AC Current main display AC Voltage e Press USB again to turn the USB secondary display interface off USB disappears and the e Active power main display Phase Meter beeps angle secondary display O t is invalid at active energy mode e Apparent power main display LOAD e Press once to enter LOAD mode MR Reactive power secondary display e Power factor main display Phase angle secondary display e Active Energy main display Time secondary display O Temperature C main display Temperature F secondary display O Press LOAD once MR icon shown the Meter displays the next stored reading the left secondary display showing the index increase one Press USB once to turn the USB appears and the Meter beeps Press again to exit LOAD mode MR disappears and the Meter beeps Press and hold LOAD for 1 second to display the stored data quickly CAL SAVE Calibrating data It is not recommended to calibrate the meter without authorization O Press once to store single reading MEM appears and the
3. C 1 5 1 C 58 F 32 F 1 18 32 F 2372 F 1 11 32 Model UT231 OPERATING MANUAL Model UT231 OPERATING MANUAL MAINTENANCE This section provides basic maintenance information including battery replacement instruction A 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 To avoid electrical shock or damage to the Meter do not get water inside the case A General Service e Periodically wipe the case with a damp cloth and mild detergent Do not use abrasives or solvents e Toclean the terminals with cotton bar with detergent as dirt or moisture in the terminals can affect readings e Turn the Meter power off when it is not in use e Take out the battery when it is not using for a long time Do not use or store the Meter in a place of humidity high temperature explosive inflammable and strong magnetic field 33 34 Figure 11 Model UT231 OPERATING MANUAL A Warning To avoid false readings which could lead to possible electric shock or personal injury replace the battery as soon as the battery indicator E3 appears Make sure the transformer jaw and the tests leads are disconected from the circuit being tested before opening the case bottom To replace the battery 1 Press POWER to turn the Meter off and remove all the connections fro
4. Environmental Requirements DG Accuracy Specifications m m 97 A AC Voltage i gi E a ii al ki z 27 LI o0 e c EL SA C AC Current 28 D Active Power m oo 28 E Apparent Power BG F Reactive Power on 30 Gs Power Factor gt ee 31 H Phase Angle gt e en Tan ai tin ran Active Energy gt gt gt e 32 J Temperature 13 Maintenance eu a ec css A General Service m oo 33 B Replacing the Battery 34 Model UT231 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 A Warning To avoid electric shock or personal injury read the Safety Information and Rules for Safe Operation carefully before using the Meter Model UT231 is a digital power clamp meter hereafter referred to as the Meter is a handheld intelligent power meter which has both the features of digital 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 Unpacking Inspection Open the package case and take out the Meter Check the followin
5. Meter beeps 9 Press and hold for over 1 second to continuous store reading MEM blinks and the Meter beeps The index number Model UT231 OPERATING MANUAL Button SAVE Operation Performed shown on the left secondary display keep on increasing Press SAVE again to exit The maximum number of data store is 99 when it achieves 99 the Meter shows FUL Press CLEAR to clear the stored reading in order to store next reading CLEAR At active energy range press to reset time the zero then restart the timing 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 10 Button MAX MIN Operation Performed at any mode except at the following ranges gt Power factor main display Phase angle secondary display gt Active Energy main display Time secondary display gt Temperature C main display Temperature F secondary display Model UT231 OPERATING MANUAL Display Symbols see figure 3 He an 9 Figure 3 Number Symbol Meaning D Data hold is active e USB Data Output is in progress
6. present active power value Note e 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 17 Model UT231 OPERATING MANUAL D Apparent Power main display Reactive Power A Warning secondary display Measurement see figure 7 To avoid damages to the Meter or harms to you do you measure higher than AC voltage 600V rms and AC current 1000A rms To test for Apparent power main display Reactive power secondary display connect the Meter as follows 1 Press the MENU to select Apparent power main display Reactive power secondary display range 2 Press the lever to open the transformer jaw and clamp them to the power source or the tested conductor 3 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 4 The double display shows the apparent power kVA value and the reactive power KVAr value of the measured object 5 The maximum apparent value kVA and the reactive Figure 7 power KVAr measuring range is 600kVar OL will be displayed when it is over than that 6 Press MAX MIN once the LCD displays MAX it 18 Model UT231 OPERATING MANUAL starts recording the maximum apparent power value 7 Press MAX MIN again the L
7. 231 OPERATING MANUAL B AC Current main display AC Voltage secondary display Measurement see figure 5 Figure 5 The AC current ranges are 40A 100A 400A and 1000A The AC Voltage ranges are 15V 100V 300V and 600V To measure AC current AC voltage connect the Meter as follows 1 Press the MENU to select AC Current main display AC Voltage secondary display range 2 Press the lever to open the transformer jaw 3 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 will cause deviation 4 The double display shows the AC current True RMS value and AC voltage True RMS value 5 Press MAX MIN once the LCD displays MAX it 15 Model UT231 OPERATING MANUAL starts recording the maximum AC current True RMS C Active Power main display Phase Angle value secondary display Measurement see figure 6 6 Press MAX MIN again the LCD displays MIN it starts recording the minimum AC current True RMS value 7 Press MAX MIN again to show the present AC current True RMS value 8 The display shows OL when the current of the tested conductor is higher than 1000A rms
8. 8 DC Indicator for DC measurement 4 h Unit for hour 6 mm Unit for minute 6 s Unit for second D ES 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 Hz Symbol of Unit PG Hz Hertz The unit of frequency KVAr PG The unit of phase angle KVAr The unit of reactive power Minimum reading 11 Model UT231 OPERATING MANUAL N Number Symbol Meaning Number Symbol Meaning 9 MIN Minimum reading 3 MEM Indicator for data store 9 mmm Analogue Bar Graph 64 FUL Indicator for data stored is full 0 b Overloading 2 me Ruler 3 MAX Maximum reading TEMP Temperature symbol 5 CAL Calibration symbol 8 CLR Indicator for clear the stored reading D Ruler negative symbol D High voltage symbol 9 Indicates negative reading 20 AC Indicator for AC voltage or current en MR Indicator for recall the stored reading ed FREQ Frequency symbol Model UT231 OPERATING MANUAL Measurement Operation Preparation e 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 EA appears on the display A AC Voltage main display Frequency secondary dis
9. CD displays MIN it starts recording the minimum apparent power value 8 Press MAX MIN again to show the present apparent power value Note e 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 E Power Factor main display Phase Angle secondary display Measurement see figure 8 a NO Brack MEM n nir le 0000 0999 Pm 0 20 4 8 so 10 19 A Warning To avoid damages to the Meter or harms to you do you measure higher than AC voltage 600V rms and AC current 1000A rms To test for Apparent power main display Reactive power secondary display connect the Meter as follows 1 2 20 Press the MENU to select 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 power factor value and the phase angle value of the measured object When the power factor value is negative it means the loading is capacltive When the power factor value is positive it means the loading is inductive MAX and MIN are not valid
10. UT231 Operating Manual Digital Power Clamp Meter P N 41451518 LINI T Model UT231 OPERATING MANUAL Model UT231 OPERATING MANUAL TABLE OF CONTENTS TITLE PAGE Overview ae 3 Unpacking ingpection DD LLL 3 Safety Information 4 Rules For Safe Operation 4 International Electrical Be EEE aa ts Ta 6 The Meter Structure SE E 6 A The Meter Front Structure 6 B The Meter Back and Bottom Shucture 8 Functional Buttons EE 8 Display Symbols 11 Measurement Operation 13 A AC Voltage Frequency Measurement 13 B AC Current AC Voltage Measurement 15 C Active Power Phase Angle Measurement 16 D Apparent Power Reactive Power Measirem nt 18 E Power Factor Phase Angle Measurement a 19 F Active Energy Time Measurement 21 G Temperature C Temperature F Measurement 23 True RMS Measurement and Average Value Measurement 24 Model UT231 OPERATING MANUAL TABLE OF CONTENTS TITLE PAGE Three Phases Four Wires and Three Phases Three Wires Measurement Method 95 Specifications a EEE EE EE SEE RET 26 A General Specifications 2 B
11. c 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 parts The internal circuit of the Meter shall not be altered at will to avoid damage of the Meter and any accident Soft cloth and mild detergent should be used to clean the 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 Turn the Meter off when it is not in use and take out the battery when not using for a long time Constantly check the battery as it may leak when it has been using for some time replace the battery as soon as leaking appears A leaking battery will damage the Meter International Electrical Symbols AC Alternating Current Grounding Double Insulated Warning Refer to the Operating Manual Deficiency of Built In Battery Danger of High Voltage RAS EP Blu 2 Conforms to Standards of European Union Model UT231 OPERATING MANUAL The Meter Structure A The Meter Face View see figure 1 eo Figure 1 Model UT231 OPERATING MANUAL O Transformer Jaw designed to pick up the AC and DC current flowing through the conductor It could transfer current to voltage The tested con
12. ductor must vertically go through the Jaw center Temperature negative Input Terminal Temperature positive Input Terminal V Voltage Input Terminal COM Input Terminal MAX MIN button Hand Guards to protect user s hand from touching the dangerous area CAL calibration button SAVE button data store button Power button USB button Max A button LIGHT button auto display backlight button MENU button HOLD button LOAD button recall data LCD Display CLEAR button clear the stored reading Testing Leads Red and Black VIII MIN V button OG PG SA 0 TGEGGEEGE Temperature Probe B The Meter Back and Bottom Structure see figure 2 AR D B Figure 2 Model UT231 OPERATING MANUAL Functional Buttons Below table indicated for information about the functional button operations Button Operation Performed POWER Press and hold POWER for 1 second to turn the Meter on Press POWER again to turn the Meter off HOLD Press HOLD to enter the Hold mode in any mode E appears and the Meter beeps 9 Press HOLD again to exit the Hold mode to return to measurement mode the Meter beeps and lal disappears LIGHT e Press LIGHT to turn the display backlight on e The display backlight will be off automatically after 30 seconds
13. el UT231 OPERATING MANUAL Range Resolution Accuracy Allowable Maximum overload protection current 40A 100A 0 1A 2 5 1000A RMS 400A 1000A 1A D Active Power W V x A x COS 9 Voltage Range Voltage Current 15V 100V 9 9 300V 600V 40A 0 60kW 4 00kW 12 00kW 24 00kW Current 100A 1 50kW 10 00kW 30 00kW 60 00kW Range 400A 6 00kW 40 00kW 120 0kW 240 0kW 1000A 15 00kW 100 0kW 300 0kW 600 0kW Precision 1 3 5 Defend Rate 100kW 0 01kW 2100kW 0 1kW Remarks Allowable maximum overload protection voltage 600V RMS e Allowable maximum overload protection current 1000A RMS 28 Model UT231 OPERATING MANUAL E Apparent Power VA V x A Voltage Current Voltage Range 15V 100V 300V 600V 40A 0 60kVA 4 00kVA 12 00kVA 24 00kVA Current 100A 1 50kVA 10 00kVA 30 00kVA 60 00kVA Range 400A 6 00kVA 40 00kVA 120 0kVA 240 0kVA 1000A 15 00kVA 100 0kVA 300 0kVA 600 0kVA Accuracy 3 5 Resolution lt 1000kVA 0 01kVA 2100kVA 0 1kVA Remarks O Allowable maximum overload protection voltage 600V RMS e Allowable maximum overload protection current 1000A RMS 29 F Reactive Power Var V x A x SIN 9 Model UT231 OPERATING MANUAL Voltage Current Voltage Range 15V 100V 300V 600V 40A 0 60kVar 4 00kVar 12 00kVar 24 00kVar Current 100A 1 50kVar 10 00kVa
14. g items carefully to see any missing or damaged part Item Description Qty 1 English Operating Manual 1 piece 2 Test Lead 1 pair 3 Alligator Clip 1 pair 4 Point Contact Temperature Probe 1 piece 5 USB Interface Cable 1 piece 6 Software 1 piece 7 Tool Box 1 piece 8 1 5V Battery LR6 4 pieces In the event you find any missing or damage please contact your dealer immediately Safety Information This Meter complies with the standards EC61010 in pollution degree 2 overvoltage category CAT III 600V CAT IV 300V and double insulation CAT III Distribution level fixed installation with smaller transient overvoltages than CAT IV CAT IV Primary supply level overhead lines cable systems 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 conditions and actions that pose hazards to the user or may damage the Meter or the equipment under test A Note identifies the information that user should pay attention to Model UT231 OPERATING MANUAL International electrical symbols used on the Meter and in this Operating Manual are explained on page 6 Rules For Safe Operation A 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 9 Before using t
15. he Meter inspect the case Do not use the Meter if it is damaged or the case or part of the case is removed Look for cracks or missing plastic Pay attention to the insulation around the connectors Inspect the test leads for damaged insulation or exposed metal 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 the Meter Model UT231 OPERATING MANUAL When measurement has been completed disconnect the connection between the test leads and the circuit under test remove the testing leads away from the input terminals of the Meter and turn the Meter power off Do not carry out the measurement when the Meter s back case and or battery door is opened to avoid electric shock When the Meter working at an effective voltage over 30V in AC special care should be taken Use the proper terminals and function 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 deteriorate after dampened Do not use the Meter if the surface of it is wet or the user s hands are wet When using the test leads keep your fingers behind the finger guards Replace the battery as soon as the battery indicator E appears With a low battery the Meter might produce false readings that can lead to electri
16. m the input terminals 2 Turn the Meter s front case down 3 Remove the screw from the battery door and separate the battery door from the case bottom 4 Take out the old battery and replace with 4 x 1 5V battery LR6 5 Rejoin the case bottom and the battery compartment and reinstall the screw Model UT231 OPERATING MANUAL END This operating manual is subject to change without notice 35 36 Model UT231 OPERATING MANUAL GCopyright 2007 Uni Trend Group Limited All rights reserved Manufacturer Uni Trend Technology Dongguan 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
17. ower and power factor The power of three phases four wires system can use single phase power measurement method to measure see figure 7 If itis a balance load the total watts is three times of single phase If it is not a balance load test each phase power separately then sum up the three phases power value to obtain the total watt The apparent power reactive 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 the line and current of the line Connect the loaded two phases to the V and COM input terminal of the power meter clamp the transformer jaw to the third phase its total watt is equal to the reading obtained times 1 732 Three phases total watt also can be obtained by using the specified clamp type three phases digital power meter 25 Specifications A General Specifications 26 Maximum Voltage between any Terminals and grounding Refer to different range input protection voltage Display Multi LCD displays Maximum display 9999 Ranges Auto Overloading Display OL Battery Deficiency Display EX Data Holding Display Lal Data Logging Maximum 99 Single o
18. play Measurement see figure 4 Te DO 5D MAN jx LI Libi o 20 40 6 80 10 Figure 4 13 The AC Voltage ranges are 15V 100V 300V and 600V The frequency range is 20Hz 500Hz A Warning When the voltage input is higher than 30V the display shows to warn you to take extra care of safety When the input voltage is higher than 600V r m s the display shows OL To measure AC voltage frequency connect the Meter as follows jp 2 14 Insert the red test lead into the V terminal and black test lead to the COM input terminal Press the MENU to select Voltage main display 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 Model UT231 OPERATING MANUAL 4 Press MAX MIN once the LCD displays MAX it starts recording the maximum AC voltage True RMS value 5 Press MAX MIN again the LCD displays MIN it starts recording the minimum AC voltage True RMS value 6 Press MAX MIN again to show the present AC voltage True RMS value 7 The display shows OL when the input voltage is higher than 600V r m s Note 9 When the measurement has been completed disconnect the connection between the testing leads and the circuit under test and remove testing leads from the input terminals Model UT
19. r 30 00kVar 60 00kVar Range 400A 6 00kVar 40 00kVar 120 0kVar 240 0kVar 1000A 15 00kVar 100 0kVar 300 0kVar 600 0kVar Accuracy 4 5 Resolution lt 1000kVar 0 01kVar 2100kVar 0 1kVar Remarks Allowable maximum overload protection voltage 600V RMS e Allowable maximum overload protection current 1000A RMS 30 Model UT231 OPERATING MANUAL G Power Factor PF W VA Range Accuracy Resolution Measuring Condition 0 3 1 0 022 ani The minimum measuring current 10A capacitive or inductive m The minimum measuring voltage 45V 0 371 Measuring current less than 10A OR capacitive or inductive For refereres Only Measuring voltage less than 45V Remarks O Allowable maximum overload protection voltage 600V RMS e Allowable maximum overload protection current 1000A RMS H Phase Angle PG acos PF Range Accuracy Resolution Measuring Condition a The minimum measuring current 10A 0 360 El 1 ae f The minimum measuring voltage 45V Measuring current less than 10A OR 0 360 For reference only Measuring voltage less than 45V 31 I Active Energy kWh Range Accuracy Resolution 1 9999kWh t 39642 0 001kWh Remarks O Allowable maximum overload protection voltage 600V RMS e Allowable maximum overload protection current 1000A RMS K Temperature TEMP Range Accuracy Resolution 50 C 0 C 1 10 1 C 0 C 1300
20. r Continuous records Data Recall Maximum and Minimum value display Voltage Current Active Power and Apparent Power ranges Display Backlight 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 Model UT231 OPERATING MANUAL energy range Analogue Bar Graph Sampling 3 times per second Max Jaw Size 55mm diameter Power 4 x 1 5V battery LR6 Dimensions 308mm x 112mm x 39mm Weight Approximate 601g Environmental Requirements Altitude Operating 2000m Storage 10000m Temperature and humidity Operating 0 C 30 C lt 85 R H 30 C 40 C 75 R H 40 C 50 C 45 R H Storage 10 C 60 C 85 R H Safety Compliances IEC 61010 CAT III 600V CAT IV 300V overvoltage and double insulation standard pollution degree 2 Certification C Model UT231 OPERATING MANUAL Accurate Specifications Accuracy a reading b digits guarantee for 1 year Operating temperature 23 C 5 C Operating humidity 45 75 R H A AC Voltage True RMS Range Resolution Accuracy Allowable Maximum overload protection Input Impedance voltage 15V 100V 0 1V 1 2 5 600 RMS 10MQ 300V B Frequency Range Precision Accuracy 20Hz 500Hz 1Hz 0 5 5 27 C AC Current True RMS Mod
21. s HOLD again to continous measurement kWh value continous accumulate and the measuring time jumps to the present measuring time e When the measuring time is over 24 hours or the Meter is switched to other measuring ranges active energy measuring will stop e The maximum readinng of acitve energy is 9999kWh OL will be displayed when the reading is over than that 5 MAX and MIN are not valid when measuring active energy 6 Press CLEAR to reset the time Note 9 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 22 Model UT231 OPERATING MANUAL Model UT231 OPERATING MANUAL G Temperature C main display and Temperature F secondary display Measurement see figure 10 K type of temperature probe Figure 10 To test for temperature C main display and Temperature F secondary display connect the Meter as follows 1 2 Press the MENU to select Power factor main 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 Note When testing has been comple
22. ted disconnect the connection between the temperature probe and the circuit under test and remove temperature probe from the input terminals 23 True RMS Measurement and Average Value Measurement The True RMS measurement method can measure accurately the effective value of non sine wave input signal Average value measurement method can measure the mean value of one sine wave input signal and then displays it as RMS value When the input waveform has distortion measuring tolerance will be included The total tolerance depends on 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 24 Model UT231 OPERATING MANUAL 2 0 PK PK n A Input Wave PK PK 0 PK RMS AVG Sine MN pr 2 828 1 414 1 000 0 900 sine commute whole wave a F NA 1000 soe nn alf wave PAR PRPK 2 828 2 828 1 414 0 900 square wave an pEpk 1 800 0 900 0 900 0 900 commuted square wave An s k 1800 1 800 1 272 0 900 pulse rectangle D X Y ur 0 9 D 0 9 D 0 9D 2 0 9 D of PK PK sawtooth triangle a 3 600 1 800 1 038 0 900 Model UT231 OPERATING MANUAL Three Phases Four Wires and Three Phases Three Wires Measurement Method The Model UT231 digital power clamp meter can measure single phase p
23. when measuring power Model UT231 OPERATING MANUAL factor Note 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 Model UT231 OPERATING MANUAL F Active Energy main display Time secondary display Measurement see figure 9 Time h mm s de innn LI Li KWh Gum 0 2 40 8 80 100 Figure 9 A Warning To avoid damages to the Meter or harms to you do you measure higher than AC voltage 600V rms and AC current 1000A rms To test for Active Energy main display Time secondary display connect the Meter as follows 1 Press the MENU to select Power factor main display Phase angle secondary display range 2 Press the lever to open the transformer jaw and clamp them to the power source or the tested conductor 3 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 4 The double display shows the active energy value and the measuring time value of the measured object 9 The measuring reading gets increasing along with the time increases Press HOLD to read a particular time kWh value Then the reading and 21 time are locked but still continuous accumulate measuring time e After read the data pres
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