UT231 Operating Manual Digital Power Clamp Meter P/N: 41451518
Model UT231 OPERATING MANUAL
Model UT231: OPERATING MANUAL TABLE OF CONTENTS TITLE Overview Unpacking Inspection Safety Information Rules For Safe Operation International Electrical Symbols The Meter Structure A. The Meter Front Structure B. The Meter Back and 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.
Model UT231: OPERATING MANUAL TABLE OF CONTENTS TITLE Three Phases Four Wires 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.
Model UT231: OPERATING MANUAL Overview Unpacking Inspection This Operating Manual covers information on safety and cautions. Please read the relevant information carefully and observe all the Warnings and Notes strictly. Open the package case and take out the Meter. Check the following items carefully to see any missing or damaged part: Warning To avoid electric shock or personal injury, read the “Safety Information” and “Rules for Safe Operation” carefully before using the Meter.
Model UT231: OPERATING MANUAL Safety Information International electrical symbols used on the Meter and in this Operating Manual are explained on page 6. This Meter complies with the standards IEC61010: in pollution degree 2, overvoltage category (CAT. III 600V, CAT IV 300V) and double insulation. Rules For Safe Operation CAT. III: Distribution level, fixed installation, with smaller transient overvoltages than CAT. IV. CAT IV: Primary supply level, overhead lines, cable systems.
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.
Model UT231: OPERATING MANUAL 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 The Meter Structure A.
Model UT231: OPERATING MANUAL 1 2 3 4 5 6 7 8 Transformer Jaw: designed to pick up the AC and DC current flowing through the conductor. It could transfer current to voltage. The tested conductor must vertically go through the Jaw center. Hand Guards: to protect user’s hand from touching the dangerous area.
Model UT231: OPERATING MANUAL B.The Meter Back and Bottom Structure (see figure 2) Functional Buttons Below table indicated for information about the functional button operations. Button POWER HOLD LIGHT Figure 2 8 1 Infrared Interface 2 USB Communication Interface Cable MENU Operation Performed Press 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, H appears and the Meter beeps.
Model UT231: OPERATING MANUAL Button MENU USB Operation Performed AC Voltage (main display) + Frequency (secondary display) AC Current (main display) + AC Voltage (secondary display) Active power (main display) + Phase angle (secondary display) Apparent power (main display) + Reactive power (secondary display) Power factor (main display) + Phase angle (secondary display) Active Energy (main display) + Time (secondary display) Temperature (main display) + Temperature (secondary display) Press LOAD once, M
Model UT231: OPERATING MANUAL Button SAVE CLEAR MAX/MIN 10 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. At active energy range, press to reset time the zero, then restart the timing. At all other ranges, press to clear stored readings.
Model UT231: OPERATING MANUAL Display Symbols (see figure 3) 1 2 3 4 5 6 24 7 23 8 22 9 21 10 20 11 19 12 18 17 16 15 Figure 3 14 Number 1 2 3 4 5 6 7 Symbol H 8 Hz, PG, KVAr USB DC h mm s 13 Meaning Data hold is active Data Output is in progress Indicator for DC measurement Unit for hour Unit for minute Unit for second The battery is low.
Model UT231: OPERATING MANUAL Number 9 10 11 12 13 14 15 16 Symbol MIN MAX TEMP CAL CLR 17 18 19 20 AC 21 MR 22 FREQ 12 Meaning Minimum reading Analogue Bar Graph Overloading Ruler Maximum reading Temperature symbol Calibration symbol Indicator for clear 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 Symbol 23 MEM 24 FUL Meaning Indicator for data store In
Model UT231: OPERATING MANUAL 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. Circuit Brack Red A.
Model UT231: OPERATING MANUAL The AC Voltage ranges are: 15V, 100V, 300V and 600V The frequency range is: 20Hz~500Hz 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: 1. Insert the red test lead into the V terminal and black test lead to the COM input terminal. 2.
Model UT231: OPERATING MANUAL B. AC Current (main display) + AC Voltage (secondary display) Measurement (see 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: Figure 5 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.
Model UT231: OPERATING MANUAL starts recording the maximum AC current True RMS value. 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. C.
Model UT231: OPERATING MANUAL The active power ranges are: 40A, 100A, 400A and 1000A The phase angle ranges are: 0° ~360° 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 1000A v.r.s. To measure active power + phase angle, connect the Meter as follows: 1. Press the MENU to select Active power (main display) + Phase angle (secondary display) range. 2.
Model UT231: OPERATING MANUAL D. Apparent Power (main display) + Reactive Power (secondary display) Measurement (see figure 7) 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: Brack Red Figure 7 18 1. Press the MENU to select Apparent power (main display) + Reactive power (secondary display) range. 2.
Model UT231: OPERATING MANUAL starts recording the maximum apparent power value. 7 . Press MAX/MIN again, the LCD displays MIN, it starts recording the minimum apparent power value. 8 . Press MAX/MIN again to show the present apparent power value. E.
Model UT231: OPERATING MANUAL 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. 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.
Model UT231: OPERATING MANUAL F. Active Energy (main display) + Time (secondary display) Measurement (see figure 9) 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: Brack Red Figure 9 1. Press the MENU to select Power factor (main display) + Phase angle (secondary display) range. 2.
Model UT231: OPERATING MANUAL time are locked, but still continuous accumulate measuring time. After read the data, press HOLD again to continous measurement. kWh value continous accumulate and the measuring time jumps to the present measuring time. When the measuring 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. 5.
Model UT231: OPERATING MANUAL G. Temperature (main display) and Temperature (secondary display) Measurement (see figure 10) K type of temperature probe To test for temperature (main display) and Temperature (secondary display), connect the Meter as follows: 1. Press the MENU to select Power factor (main display) + Phase angle (secondary display) range. 2. Inser the temperature probe positve to the TEMP+ input terminal and negative to the TEMP – input terminal and connect it to the mesaured object. 3.
Model UT231: OPERATING MANUAL 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.
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 power and power factor. The power of three phases four wires system can use single phase power measurement method to measure, see figure 7. its total watt can be directly by measuring its voltage of the line and current of the line.
Model UT231: OPERATING MANUAL Specifications A. General Specifications 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 . Data Holding: Display H .
Model UT231: OPERATING MANUAL Accurate Specifications Accuracy: (a% reading + b digits), guarantee for 1 year. Operating temperature: 23 5 Operating humidity: 45~75%R.H A. AC Voltage (True RMS) Range Resolution 15V 100V 300V 0.1V Accuracy (1.2%+5) Allowable Maximum overload protection voltage Input Impedance 600 RMS 10M B. Frequency Range 20Hz~500Hz Precision 1Hz Accuracy (0.
Model UT231: OPERATING MANUAL C. AC Current (True RMS) Range 40A 100A 400A 1000A Resolution 0.1A Accuracy (2%+5) Allowable Maximum overload protection current 1000A RMS 1A D. Active Power (W=V x A x COS Φ) Voltage / Current 40A Current 100A Range 400A 1000A Precision Defend Rate 15V 0.60kW 1.50kW 6.00kW 15.00kW (3%+5) Voltage Range 300V 100V 12.00kW 4.00kW 30.00kW 10.00kW 120.0kW 40.00kW 300.0kW 100.0kW 100kW:0.
Model UT231: OPERATING MANUAL E. Apparent Power (VA = V x A) Voltage / Current 40A 100A 400A 1000A Accuracy Resolution Current Range 15V 0.60kVA 1.50kVA 6.00kVA 15.00kVA (3%+5) 1000kVA:0.01kVA Voltage Range 100V 300V 4.00kVA 12.00kVA 10.00kVA 30.00kVA 40.00kVA 120.0kVA 100.0kVA 300.0kVA 600V 24.00kVA 60.00kVA 240.0kVA 600.0kVA 100kVA: 0.
Model UT231: OPERATING MANUAL F. Reactive Power (Var = V x A x SIN Φ) Voltage / Current 40A 100A 400A 1000A Accuracy Resolution Current Range 15V 0.60kVar 1.50kVar 6.00kVar 15.00kVar (4%+5) 1000kVar: 0.01kVar Voltage Range 100V 300V 4.00kVar 12.00kVar 10.00kVar 30.00kVar 40.00kVar 120.0kVar 100.0kVar 300.0kVar 100kVar: 0.1kVar Remarks: Allowable maximum overload protection voltage: 600V RMS Allowable maximum overload protection current: 1000A RMS 30 600V 24.00kVar 60.00kVar 240.0kVar 600.
Model UT231: OPERATING MANUAL G. Power Factor (PF = W / VA) Range 0.3~1 (capacitive or inductive) 0.3~1 (capacitive or inductive) Accuracy 0.022 Resolution 0.001 For reference only Measuring Condition The minimum measuring current 10A The minimum measuring voltage 45V Measuring 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.
Model UT231: OPERATING MANUAL I. Active Energy (kWh) Range 1~9999kWh Accuracy (3%+2) Resolution 0.001kWh Remarks: Allowable maximum overload protection voltage: 600V RMS Allowable maximum overload protection current: 1000A RMS K.
Model UT231: OPERATING MANUAL MAINTENANCE This section provides basic maintenance information including battery replacement instruction. Do not use or store the Meter in a place of humidity, high temperature, explosive, inflammable and strong magnetic field. 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.
Model UT231: 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 indicator “ ” 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:. Figure 11 34 1. Press POWER to turn the Meter off and remove all the connections from the input terminals 2.
Model UT231: OPERATING MANUAL *END* This operating manual is subject to change without notice.
Model UT231: OPERATING MANUAL Copyright 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.
