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Determination of the Faraday constant
  1. Reaction kinetics
  2. Chemical equilibrium
  3. Electrochemistry

Joule and wattmeter

LD 531 831
Joule and wattmeter
  8  Joule and wattmeter

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Description

For measurement and display of rms voltage V and current I for any wave form, plus active power P and the integral of time of P(t) (work), V(t) (surge) and I(t) (charge). The power range extends over 12 decades (from nW to kW).
The integrated electrically isolated USB port makes it possible to display and evaluate the waveforms of V(t), I(t) and P(t) their rms values, active power, apparent power and power factor (cos phi) with the supplied Windows software. * At sinusoidal input signal
** The specified accuracy applied at the end of the measuring range for DC as well as for AC with a frequency of 50 or 60 Hz and a crest factor = maximum value : effective value ≤ 2.

Technical data

  • Voltage measurement V:
    Measuring range DC: ±5/±50/±500 mV, ±5/±50/±250 V
    Measuring range AC*: -/-/350 mV, 3.5/35/250 V
  • Resolution of display: 1/10/100 µV, 1/10/100 mV
  • Input resistance: ≥1 MΩ
  • Current measurement I:
    Measuring range DC: ±0.2/±2/±20 mA,
    ±0.2/2/10 A
    Measuring range AC*: 0.14/1.4/14 mA, 0.14/1.4/10 A
  • Resolution of display: 0.1/1/10 µA, 0.1/1/10 mA
  • Input resistance: 10 Ω/approx. 0.01 Ω (shunt)
  • Power measurement P:
    Instrument range: ±10/±100 µW, ±1/±10/±100 mW, ±1/±10/±100 W, ±1/±2.5 kW
  • Resolution of display: 1/10 nW,
    0.1/1/10 µW, 0.1/1/10 mW, 0.1/1 W
  • Integration U, I, P:
    Instrument range ∫ V(t) dt: from 0.000 mVs to ±9999 kVh
    Instrument range ∫ I(t) dt: from 0.0 µAs to ±9999 kAh
    Instrument range ∫ P(t) dt: from 0.000 µWs to ±9999 kWh
  • Measuring range selection: automatic or manual
  • AC/DC change-over: automatic or manual
  • Measuring accuracy U, I**: 1%
  • Connection of the load: optional 4 mm safety sockets or earthed socket (front panel)
  • Display: 5-digit, 7-segment display for numerical value and 7x15 matrix for unit
  • Height of digits: 25 mm
  • Scanning rate: max. 10,000 values/s (for waveforms via computer)
  • USB port: USB 1.x and 2.0 (full speed), electrically isolated
  • Supply: 230 V, 50/60 Hz
  • Dimensions: 20 cm x 21 cm x 23 cm
  • Weight: approx. 2 kg
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