CHAPTER 3. FRONT PANEL OPERATION
13
2.
Press the “Enter” key to confirm the setting. Otherwise the instrument will automatically confirm and exit
the setting after 5 seconds of no activity.
CF 3
CF6
Voltage
15, 30, 60, 150, 300, 600 V
7.5, 15, 30, 75, 150, 300 V
Current
5, 10, 20, 50, 100, 200, 500 mA, 1, 2, 5, 10,
20 A
2.5 ,5 ,10 ,25 ,50 ,100 ,250 mA, 0.5, 1, 2.5, 5,
10 A
Table 3.1: Current and Voltage Ranges per Crest Factor setting
3.1.2.1
External Current Sensor
When using an external current sensor, the power meter has more current range options. See details Section
??
.
Sensor Input
Crest Factor
Ranges
EXT1
Crest Factor 3 (CF=3)
2.5 V, 5 V, 10 V
EXT1
Crest Factor 6 (CF=6)
1.25 V, 2.5 V, 5 V
EXT2
Crest Factor 3 (CF=3)
50 mV, 100 mV, 200 mV, 500 mV, 1 V, 2
V
EXT2
Crest Factor 6 (CF=6)
25 mV, 50 mV, 100 mV, 250 mV, 0.5 V, 1
V
Table 3.2: External Sensor Ranges
3.2
Voltage and current range
3.2.1
Fixed range
Select the required range from a number of options. After selection, the range will not change with the input
signal. For the voltage range, when the crest factor is 3, the maximum option is “600V” and the minimum option is
“15V”. When the crest factor is 6, the maximum option is “300V”
and the minimum option is “7.5V”.
During measurement of the distortion waveform and other
nonsinusoidal wave signals, the accuracy of measurement can be
improved by selecting the minimum range on the premise that the
measured value does not exceed the range.
3.2.2
Auto Range
The range is switched automatically according to the input signal. The range types for switching are the same as
those of the fixed range.
Principles of automatic range level increase:
The range level is increased when any one of the following conditions is satisfied.
•
Urms or Irms exceeds 110% of the current range setting.
•
The crest factor is 3. The value Upk or Ipk of the input signal exceeds 330% of the current range setting.
