Fluke 1730 - Page 13

Energy Analyzer
Specifications
7
Intrinsic Uncertainty ±(% of measurement value + % of power range)
Parameter
Influence
Quantity
Direct Input
[1]
iFlex1500-12 iFlex3000-24 iFlex6000-36 i40S-EL
Clamp: 50 mV/500 mV
Rogowski: 15 mV/150
mV
150 A/1500 A 300 A/3000 A 600/6000 A 4 A/40 A
Active Power P
Active Energy E
a
PF ≥ 0.99 0.5 % + 0.005 % 1.2 % + 0.005 % 1.2 % + 0.0075 % 1.7 % + 0.0075 % 1.2 % + 0.005 %
0.1≤ PF
< 0.99
󰇧
0.5+
√1−

3×
󰇨
%
+0.005%
󰇧
1.2+
√1−

2×
󰇨
%
+0.005%
󰇧
1.2+
√1−

2×
󰇨
%
+0.0075%
󰇧
1.7+
√1−

2×
󰇨
%
+0.0075%
󰇧
1.2+1.7×
√1−


󰇨
%
+0.005%
Apparent Power S
Apparent Energy
E
a
p
0≤ PF ≤ 1 0.5 % + 0.005 % 1.2 % + 0.005 % 1.2 % + 0.0075 % 1.7 % + 0.0075 % 1.2 % + 0.005 %
Reactive Power Q
Reactive Energy E
r
0≤ PF ≤ 1 2.5 % of measured apparent power/energy
Power Factor PF
Displacement
Power Factor
DPF/cosφ
- Reading ± 0.025
Additional
uncertainty (% of
power high-range)
V
P-N
> 250 V 0.015 % 0.015 % 0.0225 % 0.0225 % 0.015 %
[1] Only for calibration laboratories
Reference Conditions:
Environmental: 23 °C ±5 °C, instrument operating for at least 30 minutes, no external electrical/magnetic field, RH <65 %
Input conditions: CosΦ/PF=1, Sinusoidal signal f=50/60 Hz, power supply 120 V/230 V ±10 %.
Current and power specifications: Input voltage 1ph: 120 V/230 V or 3ph wye/delta: 230 V/400 V
Input current > 10 % of current range
Primary conductor of clamps or Rogowski coil in center position
Temperature Coefficient: Add 0.1 x specified accuracy for each degree C above 28 °C or below 18 °C
Example:
Measurement at 120 V/16 A using an iFlex1500-12 in low range. Power Factor is 0.8
Active power uncertainty 

:


=±󰇧󰇡1.2%+
√
.

×.
󰇢+0.005%×

󰇨=±
(
1.575%+0.005%×1000×150
)
=±
(
1.575%+7.5
)
The uncertainty in W is ±
(
1.575%×120×16×0.8+7.5
)
=±31.7W
Apparent power uncertainty 

:


=±1.2%+0.005%×

=±
(
1.2%+0.005%×1000×150
)
=±(1.2%+7.5)
The uncertainty in VA is ±
(
1.2%×120×16+7.5
)
=±30.54VA
Reactive/non-active power uncertainty 

:


=±
(
2.5%×
)
=±
(
2.5%×120×16
)
=±48
In case of a measured voltage that is >250 V, the additional error is calculated with:
=0.015%×

=0.015%×1000×1500=225W / VA / var