ISA T2000 - Voltage Measurement; Other Measurements

DOC. SIE10110 Rev. 6 Page 15 of33
- Metering temperature coefficient: ± 0,05%/°C of the value ± 0,02%/°C of the range.
- Possibility to display the current waveform.
3.6.2 Voltage measurement
- Two inputs: 10 V or 600 V, AC or DC
- Range, resolution and accuracy: see tables below.
RANGE 10 V
RESOLUTION
ACCURACY
0.199 V AC
1 mV
± (0.5% + 2 mV)
1.999 V AC
2 mV
± (0.5% + 10 mV)
9.999 V AC
10 mV
± (0.5% + 50 mV)
RANGE 600 V
RESOLUTION
ACCURACY
19.99 V AC
10 mV
± (0.5% + 40 mV)
199.9 V AC
50 mV
± (0.5% + 400 mV)
599.9 V AC
300 mV
± (0.5% + 1000 mV)
19.99 V DC
10 mV
± (0.5% + 40 mV)
199.9 V DC
50 mV
± (0.5% + 400 mV)
599.9 V DC
300 mV
± (0.5% + 1000 mV)
- Metering temperature coefficient: ± 0,05%/°C of the value ± 0,02%/°C of the range.
- Possibility to display the voltage waveform.
3.6.3 Other measurements
With relay selection, it is possible to compute measurements on external inputs. In this instance,
measurements available depend upon the AC or DC selection for both inputs (no measurement for
mixed selections).
N.
PARAMETER , AC INPUTS
DERIVED
FROM
FORMULA
UNITS
1
ACTIVE POWER, P
Iext, Vext; φ
P= I*V*cos (φ)
W
REACTIVE POWER, Q
Iext, Vext; φ
Q= -I*V*sin(φ)
VAr
2
APPARENT POWER, S
Iext, Vext
S= I*V
VA
POWER FACTOR, p.f.
φ
p.f. = cos(φ)
-
3
IMPEDANCE, Z and φ
Iext, Vext, φ
Z = V/I
Ohm, °
4
ACTIVE IMPEDANCE COMP., R
Iext, Vext; φ
R = Z* cos(φ)
Ohm
REACTIVE IMPEDANCE COMP., X
Iext, Vext; φ
X = Z* sin(φ)
Ohm
5
FREQUENCY, F
Vext
-
Hz
The angle measurement accuracy is ± 1° ± 1 digit. This accuracy applies to inputs greater than 10%
of the input range, and for frequencies of 50 ± 0,5 Hz, and 60 ± 0,6 Hz. Temperature coefficient: ±
1 ppM/°C of the value.
The frequency measurement accuracy is ± 1 mHz ± 1 digit. This accuracy applies to inputs greater
than 10% of the input range, and for frequencies of 50 ± 0,5 Hz, and 60 ± 0,6 Hz. Temperature
coefficient: ± 1 ppM/°C of the value.
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