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Instruction Sheet 531 831

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Instruction Sheet 531 831 06/05-W97-Hund Instruction sheet 531 831 Joule and wattmeter (531 831) 1 Numerical value display 2 Unit display 3 Pushbutton t START/STOP, with status LED 4 Pushbutton OUTPUT, with two status LEDs 5 Socket-outlet 6 Output, 4 mm safety sockets 7 Input, 4 mm safety sockets 8 USB port 9 Pushbutton RANGE, with status LED 10 Pushbutton U, I, P 1 Description The joule and wattmeter has been designed as a universal The device measures the effective voltage U, the effective multimeter including a wattmeter for use in lectures, demon- current I and the nonreactive power P for voltages and currents stration teaching and practical exercises. It has a large LED of any shape and, depending on the user’s choice, the electric digital display and loads can be connected via 4 mm safety work W = ∫ P(t) dt, the voltage surge Φ = ∫ U(t) dt or the charge sockets or a socket-outlet on the front panel. The power range Q = ∫ I(t) dt. If the device is connected to a computer, it is addi- extends over 12 decades from nW to kW. tionally possible to display and evaluate the time-resolved curves U(t), I(t) and P(t) as well as the apparent power and the power factor cos ϕ and to switch the load on and off under computer control. Safety notes The joule and wattmeter complies with the safety require- • Connect the device only to socket-outlets with grounded ments for electrical measuring, control and laboratory equip- neutral wire and protective conductor. ment in accordance with DIN EN 61010 part 1, and it is con- • Never apply voltages over 250 V or currents over 10 A to structed in compliance with safety class I. The device is the device. intended for use in dry rooms that are suited for the opera- tion of electrical equipment and devices. • Replace a defective fuse only with a fuse that corresponds to the original value. If the device is used as prescribed, its safe operation is guar- anteed. However, safety is not guaranteed if the device is • Always keep the ventilation slots of the housing free in improperly used or carelessly handled. If it has to be as- order to ensure sufficient air circulation. sumed that safe operation is no longer possible (e.g. in the • Allow only skilled persons to open the device. case of visible damage), shut the device down immediately. • When putting the device into operation for the first time, The built-in socket-outlet on the front panel may check whether the value for the mains voltage indicated carry a hazardous-contact voltage even if the output on the rating plate (back of housing) agrees with the local is not active. This is also true for the 4 mm sockets value. if experiments with a hazardous-contact voltage are carried out. • Before putting the device into operation, examine the housing for damage. In case of malfunction or visible • Connect only devices having a fitting mains plug to the damage shut the device down and make sure that it is not socket-outlet. used inadvertently. • When carrying out experiments with hazardous-contact voltages, only use (undamaged) safety connecting leadsat the 4 mm sockets. Instruction sheet 531 831 Page 2/8 2 Technical data Measurement of the voltage U (connection to the socket- Measurement of the charge Q: outlet): Display ranges: ±1000 µAs Range AC: 250 V ±10 mAs ±100 mAs ±1000 mAs Resolution: 0.1 V ±10 As ±100 As ±1000 As ±10 Ah ±100 Ah ±1000 Ahs Input resistance: 2 MΩ ±10 kAh ±9999*** kAh Accuracy: 1 % at upper limit of range Resolution: 0.1 µAs 0.001 mAs 0.01 mAs 0.1 mAs Measurement of the voltage U (connection to the 4 mm 0.001 As 0.01 As 0.1 As sockets): 0.001 Ah 0.01 Ah 0.1 Ah 0.001 kAh Ranges DC: ±5 mV ±50 mV ±500 mV ±5 V ±50 V ±250 V The smallest range available in a particular measurement depends on the current range selected. Ranges AC *: ––– ––– 350 mV 3.5 V 35 V 250 V Measurement of the electric work W: Resolution: 0.001 mV 0.01 mV 0.1 mV 0.001 V 0.01 V 0.1 V Display ranges: ±10 µWs ±100 µWs ±1000 µWs ±10 mWs ±100 mWs ±1000 mWs Input resistance: ≥1 MΩ ±10 Ws ±100 Ws ±1000 Ws Accuracy **: 1 % at upper limit of range ±10 kWs ±100 kWs ±1000 kWs ±10 kWh ±9999 kWh*** Measurement of the current I: Resolution: 0.001 µWs 0.01 µWs 0.1 µWs 0.001 mWs 0.01 mWs 0.1 mWs Ranges DC: ±200 µA ±2 mA ±20 mA 0.001 Ws 0.01 Ws 0.1 Ws ±200 mA ±2 A ±10 A 0.001 kWs 0.01 kWs 0.1 kWs Ranges AC *: 140 µA 1.4 mA 14 mA 0.001 kWh 140 mA 1.4 A 10 A The smallest range available in a particular measurement Resolution: 0.1 µA 0.001 mA 0.01 mA depends on the current and voltage ranges selected. 0.1 mA 0.001 A 0.01 A General data: Input resistance: 10 Ω up to 20 mA approx. 0.01 Ω above 20 mA Connection: optional 4 mm safety sockets or socket- outlet (front panel) Accuracy **: 1 % at upper limit of range Numerical value display: 5-digit 7-segment display Measurement of the power P: Unit display: 7x15-Matrix Display ranges: ±10 µW ±100 µW ±1000 µW Height of digits: 25 mm ±10 mW ±100 mW ±1000 mW ±10 W ±100 W ±1000 W Range selection: automatic or manual ±2.5 kW AC/DC- Resolution: 0.001 µW 0.01 µW 0.1 µW change-over: automatic or manual 0.001 mW 0.01 mW 0.1 mW Mains voltage: see rating plate on the back of the hous- 0.001 W 0.01 W 0.1 W ing 0.001 kW Fuse: see fuse plate on the back of the housing The smallest range available in a particular measurement Dimensions: 20 cm x 21 cm x 23 cm depends on the current and voltage ranges selected. Weight: approx. 2 kg Measurement of the voltage surge Φ: Other data: Display ranges: ±10 mVs ±100 mVs ±1000 mVs Scanning rate: max. 10.000 values/s ±10 Vs ±100 Vs ±1000 Vs (for measuring shapes of curves via com- ±10 kVs ±100 kVs ±1000 kVs puter) ±10 kVh ±9999 kVh*** Measured values 16,000 values for both U and I Resolution: 0.001 mVs 0.01 mVs 0.1 mVs memory: (for measuring shapes of curves via 0.001 Vs 0.01 Vs 0.1 Vs computer) 0.001 kVs 0.01 kVs 0.1 kVs USB port: USB 1.x and 2.0 (full speed), 0.001 kVh electrically isolated The smallest range available in a particular measurement Developer- http://www.leybold-didactic.com/software/ depends on the voltage range selected. Information: cassy-s.html *for sinusoidal input signals Page 3/8 Instruction sheet 531 831 ** for DC as well as for AC (50 or 60 Hz) and a crest factor ≤ 2 4 mm sockets (crest factor = maximum value / effective value) enable electric power (U ≤ 250 V, I ≤ 10 A) to be fed and a *** can only be reached via automatic range selection load to be connected for measuring the electrical data. 3 Scope of supply 1 Joule and wattmeter 5 Operation (without connection to a 1 Software CASSY Lab for Windows 98/ Me/ 2000/ XP or computer) higher version, with comprehensive help (without activation 5.1 Measurement of the voltage code, unlimited use with the joule and wattmeter) (connection to the 4 mm sockets): 1 USB cable 4 Short instruction Pushbutton U, I, P changes cyclically from the display of a measurement quantity (as indicated by the unit) to the next one. The default selection list is “voltage (V), current (A), power (W), electric work (Ws)”. With the combination of the pushbuttons U, I, P and t START/STOP, the voltage surge (Vs) or the charge (As) can be taken into the selection list instead of the electric work. Pushbutton RANGE changes cyclically from a measuring range to the next one or - If required, press the pushbutton OUTPUT to switch the switches the automatic range selection on (status LED AUTO status LED of the 4 mm sockets on. shines). - Use the 4 mm input sockets. If the selected range is exceeded, the device always changes automatically to the next higher range. An automatic change to - Select the unit mV or V in the unit display with the pushbut- lower ranges only takes place if the automatic range selection ton U, I, P. has been switched on. - Use the pushbutton RANGE to switch the automatic range selection on (LED AUTO shines) or to select an appropriate The change between DC and AC ranges usually takes place measuring range. automatically. With the combination of pushbuttons U, I, P und RANGE the Remark concerning direct and alternating voltage: change between DC and AC ranges can be performed manu- ally. AC ranges are indicated by the additional symbol “~” in the unit display. In the case of an unsmoothed direct voltage, AC ranges are Pushbutton t START/STOP switched on and effective values are displayed. starts and stops integration for determining the electric work, the voltage surge or the charge. Remark concerning the range selection: If the selected range is exceeded, the device always changes Pushbutton OUTPUT automatically to the next higher range.
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