9.3 Measurement specifications
KEW 2062/2062BT
- 41 -
KEW 2062/2062BT
9.3 Measurement specifications
AC current function
RMS AC current value (ACA) [Arms], Peak value (Absolute value)
[A
|
peak
|
]
Range
40.00 A/ 400.0 A/ 1000 A
*
Auto-ranging, range won’t be fixed.
A range shifts to one upper range when the input exceeds 110% or 300%
peak (absolute value) of the currently selected range and shifts to one lower
range when the input drops 90% rms.
Where any of “MAX”, “MIN”, “AVG”, or |PEAK| (peak value) has been
selected in the display mode, the selected range is fixed.
Display digit
4-digit
Sampling period 1 cycle/ 500ms
Sampling
frequency
32.8 kHz(30.5
μs
interval)
PEAK value: moving average is 9 points between 40.0Hz and 70.0Hz only.
Effective input
range
40.00A range RMS: 0.60 A to 40.00 A, PEAK value: ±(0.6 A to 56.57 A)
400.0A range RMS: 6.0 A to 400.0 A, PEAK value: ±(6.0 A to 565.7 A)
1000A range RMS: 60 A to 999.9 A, PEAK value: ±(60 A to 1414 A)
Display range
RMS value:
40.00A range :0.30 to 44.00 A
400.0A range :3.0 (36.0 A*) to 440.0 A
1000A range :30 (360 A
*
) to 1100 A
*
While auto-ranging is enabled, values displayed with “( )” will be effective,
and the LCD shows “0” when the input is less than 0.30 A and “OL” when
1100 A is exceeded.
PEAK value (absolute value): 40.00A range :
0.30 A to 120.0 A
400.0A range :
3.0 A to 1200 A
1000A range
: 30 A to 1500 A
Crest factor
3 or less on 40.00A/400.0A range, 3 or less 1500 A peak on 1000A range
Accuracy
RMS: (sine wave)
40.0 to 70.0 Hz: ±1.0%rdg±3dgt
70.1 to 1 kHz: ±2.0%rdg±5dgt
*
Add ±0.5%rdg±5dgt to the accuracy for sine waves other than 40 to 70 Hz.
PEAK value (absolute value):
40.0 to 70.0 Hz: ±2.5%rdg±5dgt
70.1 to 1 kHz: ±4.0%rdg±5dgt
Formula
A=
��
1
n
��
(
A
i
)
2
n-1
i
=
0
��
i
：
Sampling point No.
n
：
Number of samples/ cycle
Current frequency (Af) [Hz]
Display digit
4-digit
Accuracy
±0.3%rdg±3dgt (40.0Hz to 999.9Hz, sine wave)
Effective input range
Within sine wave of 40.0Hz to 999.9Hz, ACA effective input range.
Display range
40.0 to 999.9Hz
The LCD shows “---” when readings are out of the display range or
display range of ACA).
KEW 2062/2062BT
AC Voltage function
KEW 2062/2062BT
- 42 -
AC Voltage function
RMS AC voltage value (ACV) [Vrms], Peak value (Absolute value)
[V
|
peak
|
]
Range
1000V
Display digit
4-digit
Sampling period
One cycle/ 500 ms
Sampling frequency 32.8 kHz (every 30.5
ɥ
s)
PEAK value: moving average is 9 points between 40.0Hz and 70.0Hz
only.
Effective input range RMS: 30.0 V to 999.9 V Peak value: ±(30.0 V to 1414 V)
Display range
RMS: 30.0 V to 1100 V Peak value (absolute value): 30.0 V to 1555 V
* The LCD shows “Lo” when readings are below the lower limit and “OL”
when over the upper limit.
Crest factor
1.7 or less
Accuracy
RMS: sine wave
40.0 to 70.0 Hz: ±0.7%rdg±3dgt
70.1 to 1 kHz: ±3.0%rdg±5dgt
*
Add ±0.5%rdg±5dgt to the accuracy for sine waves other than 40 to 70 Hz.
PEAK value (absolute value):
40.0 to 70.0 Hz: ±2.5%rdg±5dgt
70.1 to 1 kHz: ±4.0%rdg±5dgt
Input impedance
Approx.4
MΩ
* resistance value across the terminals
Formula
V=
�
1
n
�
(
V
i
)
2
n-1
i
=
0
Connect and measure L
＝
V
1
, N
＝
V
3
i :
Sampling point No.
n : Number of samples/ cycle
Voltage frequency (Vf) [Hz]
Display digit
4-digit
Accuracy
±0.3%rdg±3dgt (40.0 Hz to 999.9 Hz, sine wave)
Effective input range
Within sine wave of 40.0Hz to 999.9Hz, ACV effective input range.
Display range
40.0 to 999.9 Hz
The LCD shows “---” when readings are out of the display range or
display range of ACV).
Signal source
V
1
to V
3
(voltage across terminals) or A
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