Yokogawa Value Series FX1000 - Manual (Page 281)

13-16
IM 04L21B01-01EN
Item Specifications
Measurement accuracy The performance values listed here were recorded under the following standard operating
conditions: 23 ± 2°C, 55 ± 10%RH; power supply frequency: 50/60 Hz ± 1% or less; rated input: ±
1% or less, power factor: 1 ± 1% or less; warm-up time: 30 minutes or more; and a location in which
vibrations and other factors do not affect the operation of the instrument.
Active power (W): ±1.0% of range
Voltage (V): ±1.0% of range
Current (A): ±1.0% of range
Apparent power, reactive power, and power factor: Value calculated from the measured values ± 1
digit
Expressions (V and A are rms values)
Apparent Power (VA) Reactive Power (Q)
(Without using the
reactive power
measurement method)
Power Factor(PF)
Single-
phase two-
wire system
VA = V × A Q = ((VA) 2 – P 2 )
ΣP/ΣVA
(Without using the reactive
power measurement
method)
Single-
phase,
three-wire
system
VAi = Vi × Ai
i = 1, 2
ΣVA = VA1 + VA2 Qi = ((VAi) 2 – Pi 2 )
i = 1, 2
ΣQ = Q1 + Q2
Three-phase
three-wire
system
VAi = Vi × Ai
i = 1, 3
ΣVA = 3/2(VA1 + VA3)
Qi = ((VAi) 2 – Pi 2 )
i= 1, 3
ΣQ = Q1 + Q3
* The FX’s apparent power (VA), reactive power (Q), power factor (PF), and phase (deg)
are determined from the voltage(V), current(A), and active power(P) by means of digital
computations. Therefore, for distorted signal input, the value obtained on the FX may
differ from that obtained on other instruments that use a different method.
* Make sure that the voltage input is at least 10% of the rated value and the current input
is at least 5% of the rated value.
* In the Σ Q computation, each phase’s Q value is computed as negative (–) if the current
input is leading the voltage input and as positive (+) if the current input is lagging the
voltage input.
Frequency: ±1.0 Hz
* The frequency of the voltage line input to voltage P1 is output in units of Hz.
Response time 2 seconds
Continuous overload Within the degree of accuracy (rated voltage and rated current × 1.2 applied for 2 hours)
Instantaneous overload Within the degree of accuracy (rated voltage × 1.5 applied for 10 seconds, rated current × 2 applied
for 10 seconds, rated current × 10 applied for 3 seconds)
Dielectric strength 2500 VAC (50/60 Hz) for 1 minute (between the current input, voltage input, and earth)
Insulation resistance 100 MΩ (500 VDC between the current input, voltage input, and earth)
Computation functions The same as the computation function (/M1)
Effects of the operating conditions
Ambient temperature
±0.05%/°C (under the following conditions: 0 to 50°C, 0.05 In ≤ I ≤ Imax, power factor = 1)
±0.07%/°C (under the following conditions: 0 to 50°C, 0.1 In ≤ I ≤ Imax, power factor = 0.5)
In: Rated current
Voltage variation Within the degree of accuracy (90 to 132 VAC or 180 to 250 VAC; frequency is 50 or 60 Hz)
External magnetic fields 400 A/m or less
Active power and voltage: ±1.0% of range
Effect of the input frequency
For a change within 45 to 65 Hz, the effect on the active power, voltage, and current is within the
accuracies.
13.5 Options