WT300 SERIES DIGITAL POWER METER
Contents
1. Fundamental Frequency Sample rate Window Width Upper Limit of Analysis orders 10Hz 75Hz f 1024 1 50 75Hz 150Hz f 512 2 32 150Hz 300Hz f 256 4 16 300Hz 600Hz f 128 8 8 600Hz 1200Hz f 64 16 4 The upper limit of analysis orders can be decreased Accuracy The accuracy shown below is the sum of reading and range errors When Line Filter is OFF lt WT310 WT332 WT333 gt Frequency Voltage Current Power 10Hz lt f lt 45Hz 0 15 of reading 0 15 of reading 0 15 of reading 0 35 of range 0 35 of range 0 50 of range 45Hz lt f lt 440Hz 0 15 of reading 0 15 of reading 0 25 of reading 0 35 of range 0 35 of range 0 50 of range 440Hz lt f lt 1kHz 0 20 of reading 0 20 of reading 0 40 of reading 0 35 of range 0 35 of range 0 50 of range 1kHz lt f lt 2 5kHz 0 8096 of reading 0 80 of reading 1 56 of reading 0 45 of range 0 45 of range 0 60 of range 2 5kHz lt f x 5kHz 3 05 of reading 3 05 of reading 5 77 of reading 0 45 of range 0 45 of range 0 60 of range lt WT310HC gt Frequency Voltage Current Power 10Hz lt f lt 45Hz 0 15 of reading 0 15 of reading 0 35 of reading 0 35 of range 0 35 of range 0 50 of range 45Hz lt f x 440Hz 0 15 of reading 0 15 of reading 0 25 of reading 0 35 of range 0 35 of range 0 50 of range 440Hz f x 1kHz 0 20 of reading 0 20 of reading 0 40 of reading 0 35 of range 0 35 of range 0 50 of range 1kHz lt f lt 2 5kHz2. lt 1 phase angle of the voltage and current power reading x power reading error 96 power range error 96 x power range indicated apparent power value tan x influence when A 0 When the line filter 45 to 66 Hz Add 0 3 of reading is turned ON Less than 45 Hz Add 1 of reading Temperature coefficient Same as the temperature coefficient for voltage and current Accuracy when the Accuracy obtained by doubling the measurement range error for the accuracy when crest factor is set to 6 the crest factor is set to 3 Accuracy of Voltage accuracy current accuracy apparent power S Accuracy of Accuracy of apparent power 1 0004 A V1 x 100 96 of range reactive power Q Accuracy of power A A 1 0002 Icos cos sin influence from the power factor when A Factor A 0 100 1 digit when voltage and current are at the measurement range rated input 10 cos A 1 0002 sin influence from the power factor when A 096 100 deg 1 digit when voltage and current are at the measurement range rated input Accuracy of phase difference Voltage Current and Active Power Measurements Item Specifications Measurement method Digital sampling method Crest factor Wiring system 3 or 6 WT310 WT310HC One element model Single phase two wire 1P2W WT332 Two element model Select from single phase two wire 1P2W single phase three
3. 31 88 4641111 Plot No 96 Electronic City Complex Hosur Road Bangalore 560100 INDIA 5 Bedok South Road Singapore 469270 SINGAPORE YOKOGAWA SHANGHAI TRADING CO LTD Phone 65 6241 9933 Facsimile 65 6241 2606 4F Tower D Cartelo Crocodile Building No 568 West Tianshan i Road Shanghai CHINA YOKOGAWA AMERICA DO SUL LTDA TECUM Praca Acapulco 31 Santo Amaro Sao Paulo SP BRAZIL CEP 04675 190 Phone 86 21 6239 6363 Facsimile 86 21 6880 4987 i Phone 55 11 5681 2400 YOKOGAWA MIDDLE EAST B S C C i Facsimile 55 11 5681 4434 P O BOX 10070 Manama Building 577 Road 2516 i i Busaiteen 225 Muharraq BAHRAIN YOKOGAWA ELECTRIC KOREA LTD ee 1301 1305 13rd floor Kolon digital tower 106 1 YOKOGAWA ELECTRIC CIS LTD i i Yangpyongdong 5Ga Yeongdeungpo Gu Seoul 150 105 Grokholskiy per 13 Build 2 4th Floor 129090 Moscow RUSSIAN FEDERATION Phone 82 2 2628 3810 Facsimile 82 2 2628 3899 Phone 7 495 737 7868 Facsimile 7 495 737 7869 i i Subject to change without notice Ed 01 b Printed in Japan 301 KP All Rights Reserved Copyright 2013 Yokogawa Meters amp Instruments Corporation
4. a 366924 BNC BNC cable im 366925 BNC BNC cable 2m 758917 Test lead set 758922 Small alligator adapters 758929 Large alligator adapters 758923 758921 Fork terminal adapter Banana fork adapter Two adapters to a set Two E n a e ed 7 eae PET n mM ede SATA 2 Mire Safety terminal adapter set in combination wi or leads Two in a set eads Two in a set spring hold type Two adapters B9284LK A External sensor cable Current sensor input connector Length 0 5 m 758929 Total length 75 cm Rating 300 V Rating 1000 V aset 705926 Connection Cable 1m For DA4 DA12 option Rating 1000 V 32 A A Due to the nature of this product it is possible to touch its metal parts Therefore there is a risk of electric shock so the product must be used with caution L lt lt Use these products with low voltage circuits 42 V or less v A AC DC Current sensor Clamp on Probe A 9H 758931 B9284LK 709526 CT1000 AC DC Current sensor DC 300 kHz 0 05 of reading 30uA 1000 Apk Safety terminal adapter set External Sensor Cable 26 pin cable for options DA4 and CT200 AC DC Current sensor DC 500 kHz 0 0596 of reading 30uA 200 Apk Screw fastened adapters Two For connection the external input DA12 CT60 AC DC Current sensor DC 800 kHz 0 05 of reading 30uA 60 adapters set 1 5 mm Allen of the WT500 to current sensor 751552 Clamp on probe 30 Hz 5 kHz 1400 Apeak 1000
5. 50m 100m 200m 500m 1 2 V OP EX1 2 5 5 A 0 V EX2 50m 100m 200m 500m 1 2 V EX1 2 5 5 10 V EX2 50m 100m 200m V OP Effective input range for voltage amp currnet CF 3 1 to 130 1 to 100 40A range only 1 to 130 Maximum displaying value for voltage amp current CF 3 1 to 140 1 to 110 40A range only 1 t0140 0 lt PF lt 1 Power reading x power reading error power range apparent power reading tan x influence when PF 0 96 Power reading x power reading error power range apparent power reading tan x influence when PF 0 Add the power reading x tan x influence when PF 0 Simultaneous measurement of RMS VotageMEAN amp DC Yes Yes No Frequecy measurement 2 channels voltage and current 2 channels voltage and current selected voltage or current one Number of display item 4 items 4 items 3 items Sampling rate Approximately 100 kS s Approximately 100 kS s Approximately 50 kS s Harmoinc measurement Yes OP G5 Yes OP G5 Yes OP HRM THD calculation maximum order setting Yes OP 1 50th Yes OP 1 50th No Auto ranging of integaration Yes Yes Yes Yes No No Yes GP IB or RS 232 Yes GP IB or RS 232 Yes OP GP IB or RS 232C Communication interface Yes GP IB or RS 232 Yes GP IB or RS 232 Yes OP GP I
6. EX1 Option 3 x y 2 5 range of range 10 Peak value of 150A or RMS value of 40A whichever is less EX2 Option 3 x 0 05 range of range 10 100 1 000 10 000 100 000 10 100 1 000 10 000 100 000 e WT310HC Aou ma Crest factor 3 1A 2A 5A 10A 20A 40A e Influence of self generated heat caused by voltage input Frequency Hz Frequency Hz ben SU E TERTIA EA Add 0 0000001 xU2 of reading to the AC voltage accuracies e U 20 i 20 4 Peak value of 150A or RMS value of 44A whichever is less M Of reading 0 0000001 xU of range to the DC current accuracies U is the F Performance of WT332 WT333 is same as that of WT310 E EA 5A 1A 2A 5A 10A 20A ee T heat caused by voltage input lasts until falling the temperature of the input resistor E on even if voltage input decreases Crest factor 6 0 25A 0 5A 1A 2 5A 5A 10A E o Peak value of 150A or RMS value of 40A whichever is less ee eee Kr e External current sensor input Add 0 00013 x 12 of readin g to the AC current accuracies o SEIT Wu 0 value less than or equal to 10 times of the rated range Add 0 00013 x 12 of reading 0 004 x I mA 0 5A 1A 2A 5A 10A 20A range or 0 00013 x 2 of allowable input Peak value of 1 5kV or RMS value of 1kV whichever is less Ha ie ean a 10 20 50 100 200 range to the DC current accuracies Current as WT310HC eae Add 0 00006 2 of reading to the AC current accurac
7. WT310HC 40ARange Only 1 to 100 display is 110 Crest factor 6 0 25 0 5 1 2 5 5 10 Add the reading error x 0 5 to above accuracies for the range of 110 to 130 of the rated range Peak value of 100A or RMS value of 30A whichever is less Measurement data update interval Measurement Frequency Range e External current sensor input Peak value less than or equal to 5 times of the rated range frequency range Do De rite E _ eci caton Continuous maximum Common mode voltage during 50 60 Hz input 98 aS 2 600Vrms II 0 5s DC 5Hz lt f lt 100kHz Influence of common When 600 Vrms is applied between the input terminal and with the voltage input P Dc AE s ere mode voltage terminals shorted current input terminals open and external current sensor input E DC Bs ae terminals shorted Double the following values when the crest factor is set to 6 Only for direct current input of WT310HC the maximum measurement range is 20kHz Input Crest factor 3 i When the line filter is 45 to 66 Hz Add 0 2 of reading Item Specifications e EX1 2 5V 5V 10V or EX2 50mV 100mV 200mV 500mV 1V 2V e At 50 60 Hz turned ON Less than 45 Hz Add 0 5 of readin Input terminal type Voltage Crest factor 6 ia iic Temperature coefficient Add 0 03 of reading C within the range 5 to 18 C or 28 to 40 C Plug in terminal safet
8. 64bit Windows Vista 32 bit or Windows XP 32 bit SP2 or later Dedicated driver will supplied from Yokogawa home page Ethernet Interface C7 Options Item Specifications Ports 1 Connector type RJ 45 connector Electrical and Mechanical Complies with IEEE802 3 specifications Transmission system Ethernet 100BASE TX 10BASE T Transmission rate 100 Mbps max Communication protocol TCP IP Supported services DHCP remote control VXI 11 1001 9 3JEMYOS uoneouedg Bl Model and Suffix Codes Specificalion WT310 1 Input element model Power Cord UL CSA standard PSE General Specifications VDE standard Item Specifications AS standard Warm up time Approx 30 minutes BS standard Operating environment Temperature 5 C to 40 C GB standard Humidity 20 RH to 80 RH No condensation NBR standard for Brazil Elevation 2000m or less Communication Interface GP IB Installation location Indoors USB is standard SEIBEL ORE 980 Storage environment Temperature 25 C to 60 C Optional function Ethernet interface Humidity 20 RH to 80 RH No condensation jn External sensor input 2 5V 5V 10V Rated supply voltage 100 VAC to 240 VAC SERUUM External sensor input 50mV
9. filter elect OFF or ON cutoff frequency of 500 Hz 0 067x I 1 of reading e WT332 WT333 0 25A 0 5A 1A 2 5A 5A 10A Input resistance Approx 5mQ input inductance Approx 0 1uH in series A D converter Simultaneous conversion of voltage and current inputs 10 72 lt f lt 20kHz 0 13 1 of reading 0 5 of range External current sensor input 1 EX2 with the resistance Resolution 16 bits 10kHz lt f lt 100kHz 0 5 of reading 0 5 of range Maximum conversion rate Approx 10us 0 09x f 10 of reading Specification e Influence of temperature changes after zero level compensation or range change Add the product of the voltage influence and the current influence listed below to the DC power accuracies DC voltage accuracy 0 02 of range C DC current accuracies WT310 bmA 10mA 20mA 50mA 100mA 200mA ranges 5uA C WT310 0 5A 1A 2A 5A 10A 20A ranges WT330 direct current input 500uA C WT310HC direct current input 1mA C External current sensor input 1 1mV C External current sensor input EX2 50uV C e Influence of self generated heat caused by voltage input Add 0 0000001 xU of reading to the AC power accuracies Add 0 0000001 xU of reading 0 0000001 xU of range to the DC power accuracies U is the voltage reading V Influence of self generated heat caused by voltage input lasts until falling the temperature of the input resistor even if
10. investment costs The wide current ranges are from 1A to 40A and voltage ranges are from 15 V to 600 V Customers can use it for the evaluation of special waveform driven devices such as IH cookers and heaters Single Phase voltage IH Cooking Heater Please visit the URL below which shows many applications and examples It will be regularly updated with the latest applications For industrial equipment and Transportation Automotive Battery or DC driven device evaluation Accurate DC measurement 0 3 total WT310HC 0 5 total Direct high current measurement up to 40A without any external current sensor WT310HC Charge Discharge Wh Ah energy measurement for batteries The WT310HC can measure currents up to 40A directly This provides a cost effective and accurate method for testing DC driven devices in vehicles without having to use extra sensors Navigation device Audio Visual device for vehicle Evaluation testing of special waveform driven devices and distorted waveforms including DC component DC 0 5Hz to 100kHz broad bandwidth capability Average active power measurement under integration mode The WT300 series has a broad frequency capability of DC and from 0 5Hz to 100kHz It can measure the RMS value of distorted waveforms like square waveforms or special waveform driven devices The average active power measurement function gives accurate power consumption data for fluctuat
11. voltage input decreases e Influence of self generated heat caused by current input WT310 Add 0 00013 x 12 of reading to the AC power accuracies Add 0 00013 12 of reading 0 004 P mA 0 5A 1A 2A 5A 10A 20A range or 0 00013 2 of reading 0 00004 x P mA bmA 10mA 20mA 50mA 100mA 200mA range to the DC power accuracies is the current reading A WT310HC Add 0 00006 x 12 of reading to the AC power accuracies Add 0 00006 x 12 of reading 0 001 x I mA to the DC power accuracies is the current reading A WT330 Add 0 00013 x 12 of reading to the AC power accuracies Add 0 00013 x 1 of reading 0 002 x P mA to the DC power accuracies is the current reading A Influence of self generated heat caused by current input lasts until falling the temperature of the shunt resistor even if current input decreases e Accuracy changes caused by data update interval When the data update interval is 100 ms add 0 05 of reading to 0 5Hz to 1kHz accuracy e Guaranteed accuracy ranges for frequency voltage and current All accuracy figures for 0 5 to 10 Hz are reference values The power accuracy figures for DC 10 Hz to 45 Hz and 400 Hz to 100 kHz when the current exceeds 20 A are reference values Influence of power factor When power factor A O S apparent power e 0 2 of S for 45 Hz lt f lt 66 Hz e 0 2 0 2 x f of S for up to 100 kHz as reference data f is frequency of input signal in kHz When 0 lt
12. without changing the Customers therefore have the flexibility to choose Test bench Air conditioner evaluation Production line test system It can measure both AC and DC bm 600 00V measurement mode The WTViewerFreePlus software is used to monitor and according to their application needs e g from 2 0 5000A to 20 000A save all these parameters production lines to engineering test benches S E d Customers can use WTViewerFreePlus software to ud set all kinds of measurements Additionally the numeric values waveform display and trend qum 15 Lio ces graphs of the measurement data can be displayed u DC to 100kHz 20 and savei en gt DC to 20kHz 40A Waveform display requires the G5 Harmonic option 50uA 5mA 10mA 20A 26A 40A o Fast display and data update rate Convenient measurement functions D A output for measurement recording Current sensor input 8 The fast display and 100ms maximum data update rate of the WT300 series MAX hold function The D A option is used to output Voltage Customers have the option to s offers customers a short tact time in their testing procedures The maximum values of RMS PEAK voltage amp current active power reactive Current Power and other measured data select either 2 5V to 10V S Consistent Basic Measurement Accuracy for all input ranges 0 1 of reading 0 1 of range 50Hz 60Hz power and apparent power can be held Line filter and frequency filter capability These filter
13. 0 80 of reading 0 95 of reading 1 68 of reading 0 45 of range 0 45 of range 0 60 of range 2 5kHz lt f lt 5kHz 3 05 of reading 3 35 of reading 6 05 of reading 0 45 of range 0 45 of range 0 60 of range The items listed below apply to all of the tables When the crest factor is set to 3 e When A the power factor is 1 Power figures that exceed 1 2kHz are reference values e For the direct current range add 10uA to the current accuracy and 10uA direct current range x100 of range to the power accuracy e For the external current sensor range add 100 pV to the current accuracy and 100uV external current sensor range rating 100 of range to the power accuracy Maximum display During harmonic measurement display range When the number of displayed digits is 4 When the number of Displayed item displayed digits is 5 ULP 99999 9999 1 0000 to 1 0000 1 000 to 1 000 Uhdf Ihdf Phdf 0 000 to 99 999 to 0 00 to 99 99 to 100 00 to 999 99 100 0 to 999 9 Uthd Ithd 0 000 to 99 999 to 0 00 to 99 99 to 100 00 to 999 99 100 0 to 999 9 00 01 Phase angle of the 1st fundamental current with respect to the 1st fundamental voltage G180 0 to d180 0 G180 0 to d180 0 e Phase angle of the 2nd harmonics and higher harmonic of voltage with respect to the 1st fundamental voltage 180 0 to 180 0 180 0 to 180 0 e Phase angle of the 2nd harmo
14. 0V 300V Input resistance Approx 500mQ 5mA 10mA 20mA 50 100mA and 200mA range of WT310 f in the read error equation is the input signal frequency in kHz Current Input inductance Approx 0 1uH in series with the resistance Within f Maxmum rated range x 0 0002 x f of range WT310 WT332 WT333 WT310HC WT310HC Current Direct input Direct input Crest factor 3 0 5A 1A 2A 5A 10A 20A The Maximum ae EI 20A Current EXT sensor input I WTSTO 5mA 10mA 20mA 50mA 100mA 200mA 0 5A 1A 2A 5A 1 08 208 a nidi Extemal current impu VEN Option Tanges oe ERAT nd zio cof reading 0 2 of nd e WT310HC 1A 2A 5A 10A 20A 40A Input resistance Approx 6 10 mO max Factory setting Within POETE 05 2099 x 0 01 x of range RZE T GOH T 0 1 of reading of rango 0 1 of reading0 1 of range e WT332 WT333 0 5A 1A 2A 5A 10A 20A Input inductance Approx 0 1uH in series with the resistance Rated range OY 9 3 a 9 9 7 a 9 Crest factor 6 e WT310HC The maximum rated range is 10 V 66Hz f x 1kHz 0 of rang i of range 0 2 of reading 0 2 of range e WT310 2 5mA 5mA 10mA 25mA 50mA 100mA 0 25A 0 5A 1A 2 5A 5A 1 0A Crest factor 3 1A 2A 5A 10A 20A 40A Line filter Select OFF or ON cutoff frequency of 500 Hz 1kHz lt f lt 10kHz 0 1 of rea of range 0 13 f of reading 0 3 of range e WT310HC 0 5A 1A 2 5A 5A 10A 20A Crest factor 6 0 5A 1A 2 5A 5A 10A 20A requency
15. 100mV 200mV 500mV 1V 2V d supply 90 VAC to 264 VAC Harmonics Measurement range voltage D A output 4CH Rated supply frequency 50 60 Hz LE supply voltage 48 Hz to 63 Hz WT310HC 1 Input element High current model requency range Power Cord UL CSA standard PSE Maximum power WT310 WT310HC 50VA WT332 WT333 70VA VDE standard Consumption AS standard External dimensions WT310 WT310HC Approx 213 W x 88 379 D mm BS standard excluding protrusions WT332 WT333 Approx 213 W x 132 H 379 D mm GB standard Weight WT310 WT310HC Approx kg NBR standard for Brazil WT332 WT333 Approx 5 kg Communication Interface GP IB Battery backup Setup parameters are backed up with a lithium battery USB is standard selectone nc 939 Optional function Ethernet interface select External sensor input 2 5V 5V 10V External sensor input 50mV 100mV 200mV 500mV 1V 2V Harmonics Measurement D A output 4CH E Rack Mount WT332 2 Input elements model WT333 3 Input elements model 751533 E2 Rack mounting kit For WT310 series EIA standalone installation Power Cord UL CSA standard PSE 751533 J2 Rack mounting kit For WT310 series JIS standalone installation AS Standard 751534 E2 Rack mounting kit For WT310 series EIA connected installation BS standard 751534 J2 Rack mounting kit For WT310 series JIS connected installation GB standard 751533 E3 Rack mounting kit For WT330 series EIA standalone installation NBR standard for Brazil 751
16. 533 J3 Rack mounting kit For WT330 series JIS standalone installation Communication Interface GP IB 751534 E3 Rack mounting kit For WT330 series EIA connected installation USB is standard SPECA ONG RS 232 751534 J3 Rack mounting kit For WT330 series JIS connected installation Optional function Ethernet interface Ask Yokogawa for information on rack mounts in which WT310 and WT330 str combined EX1 selectone Eemal sensor input 2 5V 5V 10V EX2 External sensor input 50mV 100mV 200mV 500mV 1V 2V G5 Harmonics Measurement ll Accessory sold separately DA ao Standard accessories 758917 Test lead set A set of 0 8 m long red and black test leads Power cord 1set Rubber foot 1set Current input protective cover each 1 set Start up guide 1set Connector provided only with 758922 Small alligator clip Rated at 300 V and used in a pair DM or DA12 each 1set Safety terminal adapter 758931 provided two adapters in a set times input element number CD 758929 Large alligator clip Rated at 1000 V and used in a pair 1piece included the startup guide user guide instruction manual and the communication manual by PDF data and Viewer Software 758923 Safety terminal adapter spring hold type Two adapters to a set screw fastened type Two adapters to a set 758931 Safety terminal adapter 15 mm hex Wrench 1 attached PA 758924 Conversion adapter BNC banana jack female adapter P A A
17. 5Hz 0 1 ar reading 0 1 of reading 0 1 of reading Crest factor 6 2 5mA 5mA 10mA 25mA 50mA 100mA 0 2 of range 0 2 of range 0 2 of range at the above range setting 45Hz lt f lt 66Hz 0 1 of reading 0 1 of reading 0 1 of reading 0 01 Peak value of 150A or RMS value of 100 A whichever is less 208 of range A of range um 7o of range 10 100 1 000 10 000 100 000 Crest factor 3 0 5A 1A 2A 5A 10A 20A 66Hz f x 1kHz 0 1 of reading 0 1 of reading 0 1 of reading Crest factor 6 0 25 0 5 1 2 5 5 10 0 2 of range 0 2 of range 0 2 of range Frequency Hz Power Factor at the above range setting TkHz lt f lt 10kHz 0 07x of reading 0 07 xf of reading 0 13 f of reading Peak value of 450A or RMS value of 300 A whichever is less 0 3 of range 0 3 of range 0 3 of range Example of frequency versus power accuracy characteristic Effect of common mode voltage on reading value me us T 10kHz lt f lt 20kHz ut ae rest factor 3 0 5 power specification for cos 0 Common Voltage 600Vrms Crest factor 6 0 5A 1A 2 5A 5A 10A 20A 0 5 of reading 0 5 of reading 10 Peak value of 450A or RMS value of 300 A whichever is less 10kHz lt f lt 100kHz 0 5 of range 0 5 of range WT310 15V range to H e External current sensor input 0 04x f 10 of reading 0 04 f 10 of reading WT310 0 5A range than
18. 6 32 and 64 for moving average Efficiency Computation of efficiency is possible on the WT332 WT333 Crest factor Computes the crest factor peak value RMS value of voltage and current Four arithmetic operation Six types of four arithmetic operations possible A B A B A B A B and Average active power during integration Computes the average active power within the integrated period Integration Item Specifications Mode Select manual integration mode standard integration mode or repetitive integration mode Timer Automatically stop integration by setting a timer Selectable range 0 hours 00 minutes 00 seconds to 10000 hours 00 minutes 00 seconds Set automatically to manual integration mode for 0 hours 00 minutes 00 seconds Count overflow WP 999999MWh 99999MWh q 999999MAh 99999MAh Holds the elapsed integration time and integration value and stops integration when the elapsed time of integration reaches the maximum integration time of 10000 hours or when the integrated value reaches the maximum or minimum displayable integration value 999999M or 99999M Accuracy x Power accuracy or current accuracy 0 1 of reading fixed range n the case of auto range The measurement is not carried out during a range change The first measurement data after the range change is added for the Period which measurement was not carried out Range setting Auto range or fixed range for Integrat
19. Arms wrench included for tightening Length 50 cm 96030 Clamp on probe 20 Hz 20 kHz 0 5 reading 200 Arms Due to the nature of this product it is possible to touch its metal parts Therefore there is a risk of electric shock so the product must be 751574 AC DC Current sensor used with caution 1 Maximum diameters of cables that can be connected to the adapters 758923 core diameter 2 5 mm or less sheath diameter 4 8 mm or less 758931 core diameter 1 8 mm or less sheath diameter 3 9 mm or less CT series do not conform CE Marking For detailed information see Power Meter Accessory Catalog Bulletin CT1000 00E 2 The coax cable is simply cut on the current sensor side Preparation by the user is required YOKOGAWA gt Yokogawa Meters amp Instruments Corporation j Before operating the product read the user s manual thoroughly for proper and safe operation YOKOGAWA METERS amp INSTRUMENTS CORPORATION Tachihi Bld No 2 6 1 3 Sakaecho Tachikawa shi Tokyo 190 8586 Japan Global Sales Dept Phone 81 42 534 1413 Facsimile 81 42 534 1426 YOKOGAWA CORPORATION OF AMERICA YOKOGAWA AUSTRALIA PTY LTD een oo Re ee devo ee See eee 3 2 Dart Road Newnan GA 30265 1094 U S A Tower A 112 118 Talavera Road Macquarie Park NSW 2113 Represented by i Phone 1 770 253 7000 Facsimile 1 770 254 0928 Australia i Euroweg 2 3825 HD Amersfoort THE NETHERLANDS YOKOGAWA INDIA LTD i Phone 31 88 4641000 Facsimile
20. B or RS 232C Yes OP Yes OP No IEEE stanndard for GP IB IEEE488 2 IEEE488 2 IEEE488 1 and IEEE488 2 Comparetor function No No Yes Viewer software setting Free included Free included Free download 62301 Test Report CW amnem imn omnc Test Report 1 Simultaneous mode independent measurement using the WTViewerFreePlus PC software A command compatible mode for the previous WT200 series is prepared IEEE488 2 only In that mode the WT300 series works identically to a WT200 series except for the Store and recall operation and the Compare functions Voltage input terminals Current Input terminals External current sensor input USB communication interface GP IB RS 232 Standard Ethernet Optional D A output connector Superior points Changed points F cD go 5 D o Example of basic characteristics Specification Example of Frequency power Accuracy Characteristics Total power Error with rated range input for an arbirtary power factor e WT332 WT333 Voltage and Current Accuracy f 50 60Hz Crest factor 3 0 54 1A 2A 5A 10A 20A Item Specifications 1 00 anrr Eo ZOO Crest factor 6 0 25A 0 5A 1A 2 5A 5A 10A Accuracy Requirements m _ Se ETE _ E E Input
21. NUMBER AR oe EM2 11 7 MME fo NUME Fe T ER 1 NUMERIC NORMAL STEM U 1 Tenit 11 7 NUMERIC NOR MAL L Daw PANGE CLEMENTI 1 Dte seat VR Ta TOLL CURRENT PANG NORMAL HUMEUR 3 Tn 0 1 107 oo 0 D 90 0 OOQUE 90 0 00000E 2 zh Pe s win 200000000 36 0 00000 53 000 e c Tq EILEEN sp Ji qe 0 00 o BE ame ee m suoneoiddy i P Coming soon LabVIEW is a registered trademark of NATIONAL INSTRUMENTS Corporation in the U S A Visual Basic Visual C Visual Basic NET and Visual C are registered trademarks of MICROSOFT Corporation in the U S A Comparison between WT210 230 series WT310 330 series WT210 WT230 0 3 of reading 0 2 of range 5m 10m 20m 50m 100m 200m The software can display items which cannot be shown on the display of the WT300 series such as multiple numeric measurement parameters the harmonics data of each order bar graphs trend graphs and voltage amp current waveforms The free software thus adds additional performance to the WT300 series Please check the Instruction manual in the CD for more information As well as using the WT300 series front panel to setup the powermeter you can use the software to quickly set up your favorite conditions It also shows all the setting parameters and the status at a glance In particular you can set up the range skip function range configuratio
22. YOKOGAWA g 5 SERIES DIGITAL POWER METER 3 0 gn n m YOKOGAWA WT330 rem em T ox STR mann eae YOKOGAWA WT310HC fiir TU m High Performance and Reliability e Basic Accuracy of 0 1 of Reading Current Measurement down to 50 micro Amps DC 0 5 Hz to 100 kHz Frequency Range Standard USB and GPIB RS232 Interfaces Warranty C Bulletin WT300 01EN YOKOGAWA WT330 YOKOGAWA WT310 YOKOGAWA WT310HC The WT300 series is the 5th generation of ADM Yokogawa s compact power meter portfolio The world s best selling power meter is the H power meter of choice in multiple industries from production lines to R amp D applications SaJnjeo M M M WT332 2ch WT333 3ch WT310 1ch WT310HC 1ch MAX40A 5 3 2 Wide current input range with high performance and reliability PC Data Logger and External Sensors connectivity Wide current input ranges Simultaneous measurement of all parameters The WT300 series offers a wide range of communication interfaces such as USB GP IB or RS 232 Selectable and The WT300 series offers customers a wide range of current inputs from a AWT300 series can measure all DC and AC parameters It can also measure Ethernet Optional few mA right up to 40Arms harmonics and perform integration simultaneously
23. cs Because the influence depends on the size of the frequency component if the frequency component is small with respect to the range rating the influence is also negligible Display Item Specifications Display type 7 segment LED Simultaneous display 4 items Maximum display During normal measurement display range When the number of displayed digits is 4 When the number of Displayed item displayed digits is 5 U P S Q 99999 9999 1 0000 to 1 0000 1 000 to 1 000 0 0180 0 to d180 0 0180 0 to d180 0 fU 99999 9999 WP WP q 0 e When the unit is MWh or MAh 999999 999999 99999 for negative watt hour and ampere hour e When the unit is other than MWh or MAh 99999 99999 TIME Elapsed integration time Display A indication Display resolution 0 to 99 hours 59 minutes 59 seconds 0 00 00 to 99 59 59 1s 100 hours to 9999 hours 59 minutes 59 seconds 100 00 to 9999 59 1minute 10000 hours 10000 1 hour Efficiency WT330 only 100 00 999 99 100 0 999 9 96 Crest factor 99999 9999 Four arithmetic operation 99999 9999 Average active power 99999 9999 Voltage peak 99999 9999 Current peak 99999 9999 Power Peak 99999 9999 Accuracy x accuracy of each measurement item 0 2 of FS FS 5V D A conversion resolution 16 bits Minimum load 100 kO Update Interval Same as the data update interval Temperatur
24. e coefficient 0 05 C of FS Remote Control Input Output Signal DA4 DA12 Options Item Specifications Remote control input signal EXT HOLD EXT TRIG EXT START EXT STOP EXT RESET Remote control output signal INTEG BUSY TIL 1 0 level 1 0 logic format Negative logic falling edge GP IB Interface Standard on C1 Item Specifications Usable devices National Instruments Corporation PCI GPIB or PCI GPIB PCle GPIB or PCle GPIB PCMCIA GPIB or PCMCIA GPIB not support on Windows Vista or Windows 7 GPIB USB HS Use driver NI 488 2M Ver 2 8 1 or later Electrical and mechanical Complies with IEEE St d 488 1978 JIS C 1901 1987 Serial RS 232 Interface Standard on C2 Item Specifications Connector type D Sub 9 pin plug Electrical specifications Complies with EIA 574 EIA 232 RS 232 standard for 9 pin Baud rate USB PC Interface Select from 1200 2400 4800 9600 19200 38400 or 57600bps Item Specifications Number of ports Connector Type B connector receptacle Electrical and Mechanical Complies with USB Rev 2 0 specifications Supported transfer modes HS High Speed 480 Mbps and FS Full Speed 12 Mbps Supported protocols USBTMC USB488 USB Test and Measurement Class Ver 1 0 PC system requirements A PC with a USB port running the English or Japanese version of Windows 7 32 bit
25. equal to 10 times of the rated range Influence of temperature changes after zero level compensation or range change m 5 mc mo e m Crest factor 3 0 5AV1A 2A 5A 10A 20A WTSTO SmA TOmQA 2OmA SOmA TOOTSA 200m ranges 00 085 E b i suh e WT310 0 5A 1A 2A 5A 10A 20A ranges and WT330 direct current input 500uA C c Peak value of 450A or RMS value of 300 A whichever is less WT310HC direct current input 1mA C Instantaneous maximum Voltage External current sensor input EX1 1mV C i allowable input Peak value of 2kV or RMS value of 1 5kV whichever is less External current sensor input EX2 50uV C 8 0 for 1 s am Accuracy of the waveform display data Upk and Ipk S li Add the following value to the above accuracy reference value The effective input range is within 300 of i ith 0 m 5 Crest factor 3 5mA 10mA 20mA S0mA 100mA 200mA eee ie Di A M Crest factor 6 2 5mA 5mA 10mA 25mA 50mA 100mA Direct current input range 5 WT310 5 10 20 50 100 200 range 3 y 0 005 range of range WT310 0 5A 1A 2A 5A 10A 20A range WT330 direct current input 3 x 0 5 range 9o of range EIS factor M A WT310HC direct current input 3 y 1 of range T ie En 6 0 25A e 2 5 External current sensor input range 0 above TANA SEUNG
26. functions will cut off unnecessary noise amp harmonic components for fundamental waveform measurements First in Class and First in Industry for recording to data loggers 5Vdc outputs WT310 WT310HC 4CH WT332 WT333 12CH range EX1 option or 50mV to 2V range EX2 option inputs for measuring large currents using current clamps or current sensors with voltage outputs First in class Auto ranging function available in selected ranges me UL N First in industry Integration measurement auto ranging function The auto range function is used to select change the range automatically in specific ranges Range Conventionally when power meters operate in an integration mode to measure power consumption and standby power the measuring ranges need to be fixed This results in shorter range changing times and thus quicker and more efficient testing MM PE UE ante However if the level of the input exceeds the maximum of the selected range the results will be incorrect and the test will need to be repeated with higher ranges d E Sees applied ke is The WT300 series has a high speed automatic ranging capability in integration mode which removes this need to repeat the test and integration is continuous and Range change ends Change to selected accurate This function is not only available for Wh but also for Ah and DC current Image of Range skip configuration function operation According to YOKOGAWA su
27. ications Allows input of voltage output type current sensor signal For detailed input specifications see Input Measurement range of the EX1 option Crest factor 3 2 5V 5V 10V Crest factor 6 1 25V 2 5V 5V Measurement range of the EX2 option Crest factor 3 50mV 100mV 200mV 500mV 1V 2V Crest factor 6 25mV 50mV 100mV 250mV 500mvV 1V D A Output DA4 DA12 Options Item Specifications Output voltage 5 V FS approx 7 5 V maximum against each rated value Number of output channels 4 outputs for products with the DA4 12 outputs for products with the DA12 option Set for each channel U P S Q A fU fl Ipk WP WP q q and MATH Output items D lead and lag e When the measured value is 50 or more 100 or more when the crest factor is 6 of the measurement range e Frequency 20 Hz to 2kHz WT310HC to 1 2 e Phase difference 5 to 175 Scaling Set the current sensor transformation ratio VT ratio CT ratio and power factor when applying the external current sensor VT or CT output to the instrument e Significant digits Selected automatically according to significant digits in the voltage and current ranges e Selectable range 0 001 to 9999 Averaging Select the method from the following two types e Exponential averaging method e Moving average method Select the attenuation constant for exponential averaging select the sample number from 8 1
28. ies 359 Add 0 00006 1 of reading 0 001 x I mA to the DC current accuracies is the current reading A Crest factor 3 0 5A 1A 2A 5A 10A 20A WT332 WT333 d ex aa 6 0 25A A 1A 2 5A 5A 10A Add 0 00013 x 12 of reading to the AC current accuracies 5 E i ove ata are TRU Add 0 00013 x I 96 of reading 0 002 x P mA to the DC current accuracies is the current reading A Can vaUe OF ROMS D aie Valle Ol SUA WAICNGVET IS ESS Influence of self generated heat caused by current input lasts until falling the temperature of the shunt resistor Crest factor 3 5mA 10mA 20mA 50mA 100mA 200mA even if current input decreases o e te A TomA 25mA 50mA 100mA e Accuracy changes caused by data update interval When the data update interval is 100 ms add 0 05 of reading to the 0 5Hz to 1kHz accuracy of 30A or RMS value of 20A whichever is less e Guaranteed accuracy ranges for frequency voltage and current All accuracy figures for 0 5 to 10 Hz are reference values Crest factor 3 1A 2A SA 10A 20A 40A The current accuracy figures for DC 10 Hz to 45 Hz and 400 Hz to 100 kHz when the current exceeds 20 A are 2 WT31 0 series Unit mm WT330 Series Unit mm Crest factor 6 0 5A 1A 2 5A 5A 10A 20A reference values e Peak value of 100A or RMS value of 44A whichever is less WT332 WT333 Input range 1 to 130 with respect to the rated range of voltage or current It displays up to140 Crest factor 3 0 5A 1A 2A 5A 10A 20A
29. ined on other instruments that use a different method e f the voltage or current is less than 0 5 less than or equal to 1 if the crest factor is set to 6 of the rated range zero is displayed for S or Q and error is displayed for A and e For Q var when the current leads the voltage the Q value is displayed as a negative value when the current lags the voltage the Q value is displayed as a positive value The value of Q2 may be negative because it is calculated from the Q of each element with the signs included D LEAD G LAG Lead and lag detection Phase angle s The lead and lag of the voltage and current inputs can be detected correctly for the following e Sine waves Harmonic Measurement G5 Option Specification Item Specifications Measured item All Installed elements Method PLL synchronization method Frequency range Fundamental frequency of the PLL source is in the range of 10 Hz to 1 2k Hz PLL source Select voltage or current of each input element e Input level 5096 or more of the rated measurement range when the crest factor is 3 100 or more of the rated measurement range when the crest factor is 6 e The frequency filter must be turned on when the fundamental frequency is less than or equal to 200Hz FFT data length 1024 Window function Rectangular Sample rate window width and upper limit of analysis
30. ing power devices such as burst waveform operated devices Therefore the customer can perform accurate distorted waveform measurements without using special mode settings Square Waveform Burst Waveform Duration testing and efficiency measurement for industrial motors and rotating machinery Integration measurement for long period D A output function for data recording DC 0 5Hz to 100kHz broad bandwidth capability The WT300 series provides reliable current integration Ah and Energy Wh measurement for up to 10 000 hours approx 1 year The D A option is used to save and monitor the measurement results WT310 WT310HC 4ch WT332 WT333 12ch An external recorder or data logger like a ScopeCorder can be used to save this D A function data along with other parameters such as temperatures torque and rotation speed External input for current sensor Conformance and evaluation testing of uninterruptable power supplies UPS Maximum order setting for THD calculations Efficiency measurements using a single power meter Average active power measurement under integration Mode The WT300 series enables users to conduct conformity tests according to UPS performance testing standards The WT300 series is used to measure and calculate input amp output levels the efficiency frequency and THD The average active power data also provides accurate values of power consumption The WT300 series al
31. ion is available For details on range switching see section of Voltage Current and Active Power Measurements Valid Frequency Ranges for Integration Active power DC to 45 kHz Current When the measurement mode is RMS DC lower limit frequency determined by the data update interval to 45 kHz When the measurement mode is VOLTAGE MEAN DC lower limit frequency determined by the data update interval to 45 kHz When the measurement mode is DC DC to 45 kHz Timer accuracy 0 02 Remote control Start stop and reset operations are available using an external remote signal applies to products with the DA4 or DA12 option e For nth harmonics component input add n m 1 50 of the nth harmonics reading to the n mth harmonics and n mth harmonics of the voltage and current and add n m 1 25 of the nth harmonics reading to the n 4 mth harmonics and n mth harmonics of the power Add n 500 of reading to the nth component of the voltage and current and add n 250 of reading to the nth component of the power e The accuracy when the crest factor is 6 is the same as the accuracy when the crest factor is 3 after doubling the measurement range e The guaranteed accuracy ranges for frequency voltage and current are the same as the guaranteed ranges for ordinary measurement If the amplitude of the high frequency component is large influence of approximately 1 may appear in certain harmoni
32. n setting and specify the maximum order used for the THD calculation a RN WISTO WTSSZ WT33S DC power measurement accracy 0 1 of reading 0 2 of range 0 3 of reading 0 2 of range 06 Standby power measurement conforming to IEC62301 Ed2 0 Power Consumption Measurement Software Free The Power Consumption Measurement Software together with a WT310 or another WT series instrument provides a trustworthy power measurement solutions for testing the standby and off mode power of household products and office equipment The solution enables testing to be performed according to the IEC62301 Ed1 0 and Ed2 0 standards which specify the use of special algorithms for determining the power stability in the device under test The software thus gathers all the required measurement data from the WT310 which includes not only voltage current power frequency but also the total harmonic distortion THD and the crest factor CF of the AC power supply We therefore also recommend that the WT310 is installed with the harmonic option G5 and that a low distortion power supply is used for the test Configuring and Establishing a New Connection between the WT310 and a PC Current range Direct input Crest factor 3 5m 10m 20m 50m 100m 200m 0 5 1 2 5 10 20 A WT310 0 5 1 2 5 10 20 A WT332 WT333 1 2 5 10 20 40 A 0 5 1 2 5 10 20 WT210 0 5 1 2 5 10 20 A WT230 External current input EX1 2 5 5 A 0 V EX2
33. nics and higher harmonics of current with respect to the 1st fundamental current 180 0 to 180 0 180 0 to 180 0 Unit symbols m k M V A W VA var Hz h TIME Number of displayed digits Select 5 or 4 digits Data update interval Select 0 1 s 0 25 5 0 55 15 25 or 5 s Response time At maximum 2 times the data update rate The time it takes to reach the accuracy of the final value when the displayed value changed from 0 to 100 or 100 to 0 of the rated range The indicator illuminates when the input signal meets the conditions for auto range switching Overrange oL is displayed for the following conditions When the measured value exceeds 140 of the rated range WT310HC 40A range When the measured value exceeds 110 of the rated range Auto range monitor Overrange display Hold Holds the displayed value Single update Updates the displayed value once each time the SINGLE key is pressed during Hold MAX hold Holds the maximum displayed value of U P S 0 U pk Ixpk and P pk Internal memory Item Specifications Measured data Recall the stored measurement data by a communication command Store interval Data update interval or in the range of 1 s to 99 hrs 59 min 59 s There is no backup function of stored measurement data Saves Loads four patterns of setup information Setup information External Current Sensor Input EX1 and EX2 options Item Specif
34. ong with the WTViewerFreePlus software helps to simultaneously measure all the necessary parameters required to test a UPS thereby reducing the evaluation time UPS m http tmi yokogawa com technical library application notes suoieoijddy 1001 9 3JEMYOS N D e o Easy set up and display of Numeric data Support tools for creating dedicated programs LabVIEW Drivers Programming tool samples To help you create dedicated programs for your system we provide sample programs which support Visual Basic Visual C Visual Basic NET and Visual C The sample programs support communication via USB GP IB RS 232 or Ethernet interfaces and can be downloaded from our Web site Trend graphs and Waveforms using PC application software WTViewerFreePlus For WT300 Series included The WTViewerFreePlus software can capture measured numeric values harmonic values and waveform data The data can be transferred to a PC via a USB GP IB RS 232 or Ethernet communication interface and it can be displayed and saved on the gt TEST 500 Acquire umeri and Example Data acquisition is possible using LabVIEW LabVIEW drivers can be downloaded from our Web site Free of charge PC Waveform display requires G5 Harmonic option Setting Window Measurement Window A mE oa ae PPEP BEP i MAL
35. reePlus PCM software Development and evaluation tool for home appliances 5mA range helps small current measurement WT310 Auto ranging function under Integration mode Range skip range configuration function provides the ability to select the usable ranges in advance Auto ranging enables the WT300 series to rapidly adapt to changing input conditions The range skip function reduces the range change transition period The WT310 can measure both large and small currents accurately in a single test This can reduce the total evaluation period or removes the need to use two rather than one power meters for the application thereby saving capital cost Image of TOME Action of Yokogawa s previous model D nput signal changes range configuration function for WT300 series 1 Range change ends Change available ranges stepwise Action of WT310 WT330 series range configration Range change ends Change to selected next range Comparison with Yokogawa s previous model WT210 WT230 Evaluation of large current equipment such as Induction Heaters Cookers Direct high current measurement up to 40Arms without using external current sensors WT310HC Auto ranging function for Integration mode The WT310HC allows 40Arms to be directly inputted without the requirement to use current clamps or current sensors This not only provides more precise measurement but also saves on
36. resistance Approx 6mQ input inductance Approx 0 1uH in series Temperature 23 5 C Humidity 30 to 75 RH with the resistance Input waveform Sine wave Crest factor 3 Common mode voltage 0 V e External current sensor input EX1 Scaling function OFF Number of displayed digits 5 digits WT310 Spec and reference value Lower Crest factor 3 2 5V 5V 10V Frequency filter Turn ON to measure voltage or current of 200 Hz or less E WT310HC 150V 10A range A Crest factor 6 1 25V 2 5V 5V After warm up time has passed o WT310HC_Spec and reference values_Upper m Input resistance Approx but After ui m or measurement range is changed WT310HC S d ref lues Li E e External current sensor input EX2 ccuracy at 12 months EE Crest factor 3 50mV 100mV 200mV 500mV 1V 2V The accuracy shown below is the sum of reading and range errors 0 10 Crest factor 6 25mV 50mV 100mV 250mV 500mV 1V fin the read error equation is the input signal frequency in kHz A Input resistance Approx 20 WT310 WT330 WT310HC WT310HC Instantaneous maximum Voltage oltage Current oltage Current EXT Current Direct input E E allowable input Peak value of 2 8 kV or RMS value of 2 0 kV whichever is less Vidi oe input put DC 0 196 of reading 0 1 of reading 0 296 of reading NI 0 2 of range 0 2 of range 0 2 of range 0 0 0 Crest factor 3 5mA 10mA 20mA 50mA 100mA 200mA 0 5Hz lt f lt 4
37. rvey by Dec 2012 NO 04 WT300 power meters are easy to use cost effective and accurate for a wide range of applications in Production Testing Evaluation and R amp D For Home appliances and Office equipment Production line or QA testing of electric Devices Compact half rack mount size helps customers build smaller test systems with a better Return on Investment ROI D A output function for data recording Multiple communication interfaces USB RS 232 or GP IB and Ethernet capability The simultaneous measurement of power consumption parameters such as U P frequency Power Factor and Harmonics for production line or QA testing results in reduced tact times Thus testing is faster and cheaper The DA output and communication interfaces enable data to be remotely and flexibly captured Testing to international standards such as IEC62301 Energy Star and SPECpower The WT310 has a high measurement resolution of Max 100uW under the 5mA range setting Simultaneous measurement of normal power parameters harmonic components and THD Dynamic input capability of crest factor Max 300 Peak value minimum effective RMS value Free PCM software for IEC62301 testing The WT310 together with the power consumption measurement PCM software enables users to perform standby power testing according to international standard YONDOAWA mm odi pee inm ESOS m WTViewerF
38. s 1 5Hz lt f lt 50kHz 5s 0 5Hz lt f x 20kHz Only for the direct current input of WT310HC the maximum measurement range is 20kHz Measurement range Auto switching among six types 1 Hz 10 Hz 100 Hz 1 kHz 10 kHz and 100 kHz Frequency filter Select OFF or ON cutoff frequency of 500 Hz Accuracy Computation Item Requirements When the input signal level is 30 or more of the measurement range If the crest factor is set to 3 60 or more if the crest factor is set to 6 e Frequency filter is ON when measuring voltage or current of 200 Hz or less Accuracy 0 06 of reading Specifications Computing equation of apparent power S reactive power Q power factor A and phase angle i input element number Single Phase Three Phase Three Voltage Three Phase Three Wire 1P3W Three Wire 3P3W Three Current Four Wire 3PAW Method 3V3A U1 U3 2 U1 U2 U3 3 gt 11 13 2 11 12 13 3 P gt W P1 P3 P1 P2 P3 S2 VA Si Uixli S14 S3 a 51453 n 51452483 1 52 53 Q2 var Qi ipi Q1 03 Q1 02 03 AX Ai Pi Si P S 5 1 cos 2 Si S On the WT310 WT310HC WT332 WT333 S Q A and are derived through the computation of the measured values of voltage current and active power Therefore for distorted signal input the value obtained on the WT310 WT310HC WT332 WT333 may differ from that obta
39. value of voltage and current VOLTAGE MEAN the rectified mean value calibrated to the RMS value of the voltage and the true RMS value of the current DC simple average of voltage and current Measurement synchronization source Select voltage current or the entire period of the data update interval for the signal used to achieve synchronization during measurement Line filter Select OFF or ON cutoff frequency at 500 Hz Peak measurement Measures the peak max min value of voltage current or power from the instantaneous voltage instantaneous current or instantaneous power that is sampled Zero level compensation Removes the internal offset of the WT310 AWNT310HC WT332 WT333 Frequency Measurement Item Specifications Measured item Voltage and current frequencies applied to one selected input element can be measured WT332 two element model Select voltage U1 current 11 of input element or voltage U3 current I3 of input element3 WT333 three element model Select voltage U1 current 11 of input element voltage U2 current I2 of input element2 or voltage U3 current I3 of input element3 Method Reciprocal method Frequency measuring range Varies depending on the data update interval see description given later as follows Data Update Interval Measurement Range 0 1s 25Hz x f x 100kHz 0 25s 10Hz x f x 100kHz 0 5s 5Hz x f x 100kHz 1s 2 5Hz lt f lt 100kHz 2
40. wire 1P3W or three phase three wire 3P3W WT333 Three element model Select from single phase two wire 1P2W single phase three wire 1P3W three phase three wire 3P3W three phase four wire 3PAW or three voltage three current 3V3A Range select Select manual or auto ranging Auto range Range increase e The range is upped when any of the following conditions is met e Urms or Irms exceeds 130 of the currently set measurement range e Crest factor 3 Upk Ipk value of the input signal exceeds 300 of the currently set measurement range e Crest factor 6 Upk Ipk value of the input signal exceeds 600 of the currently set measurement range On the WT330 when any of those input elements meets the above condition the range is increased the next time the measured value is updated Range decrease e The range is decreased when all of the following conditions are met e Urms or Irms is less than or equal to 30 of the measurement range e Urms or Irms is less than or equal to 125 of the next lower measurement range e Crest factor 3 Upk Ipk value of the input signal exceeds 300 of the currently set measurement range e Crest factor 6 Upk Ipk value of the input signal exceeds 600 of the currently set measurement range On the WT330 when all of the input elements meet the above condition the range is downed down the next time the measured value is updated Display mode Switching Select RMS the true RMS
41. y terminal So EXT 1 25V 2 5V SV or EX2 25mV S0mV 100mV 250mV S00mV AV n d Accuracy when the Accuracy obtained by doubling the measurement range error for the accuracy when the Current Input impedance Voltage 0 01 of range or more f is frequency of input signal in kHz breet factor Is set for crest factor serio d e Direct input Large binding post Input resistance Approx 2 MQ input capacitance Approx 13 pF in parallel e 15 V 30 V 60 V 150 V 300 V 600 V ranges 0 5 A 1 A 2 A 5 A 10 20A e External current sensor input option isolated BNC connector with the resistance ranges of WT310 WT332 WT333 1 A 2 A 5 A 10 A 20 A 40A ranges of Active Power Accuracy Floating input through resistive voltage divider Direct input Within Maxmum rated range 0 001 x f of range Accuracy Requirements g Current e WT310 Rated range Same as the conditions for voltage and current Floating input through shunt Crest factor 3 5mA 10mA 20mA 50mA 100mA 200mA The maximum rated range is 600 V for the voltage input terminal and 20 A for the e Power factor 1 Measurement range Voltage Crest factor 6 2 5mA bmA 10mA 25mA 50mA 100mA current input of WT310 WT332 WT333 and 40 A for the current input terminal of Accuracy at 12 months Crest factor 3 15V 30V 60V 150V 300V 600V at the above range setting WTS10HC and 2 V for option EX2 The accuracy shown below is the sum of reading and range errors Crest factor 6 7 5V 15V 30V 75V 15
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