Operation
4-17
4.5.3 Setting External Range
Figure 4-25 External Range Setup Screen
The 66203/66204 Digital Power Meter has 4 ranges for external measurement, which are
100mVrms/50mVrms/25mVrms/10mVrms and the crest factor (CF) of each range is 4.
Thus, the measureable range for current peak is range×CF.
If the input voltage peak is four times over the range, the display will show Over Current
Range (OCR) warning message and beep. When the signal peak is down to the
measureable range or proper range is selected, the over current range warning message will
disappear automatically.
Figure 4-26 Over Current Range Message
Following is the procedure to select the current range:
1. Press I RANGE, the 1
st
to 4
th
display windows will show the external range status at
present respectively. The channel indicators will show channel 1~channel 4
respectively as well.
2. In the 1
st
display window, the range of channel 1 will blink. Use ↑, ↓ to select the
external range. When done, press TRIG/ENTER to confirm it. Then, the range of
channel 2 in the 2
nd
window will blink.
3. Use ↑, ↓ to select the external range in the 2
nd
display window. When done, press
TRIG/ENTER to confirm it. Then, the range of channel 3 in the 3
rd
window will blink.
4. Use ↑, ↓ to select the external range in the 3
rd
display window. When done, press
TRIG/ENTER to confirm it. Then, the range of channel 4 in the 4
th
window will blink.
5. Use ↑, ↓ to select the external range in the 4
th
display window. When done, press
TRIG/ENTER to confirm it. Then, it returns to the 1
st
display window.
6. When the settings are done, press SETUP to exit the menu.
7. To skip to the desired channel for range setup, press TRIG/ENTER continuously to skip
the channel setting or press the mapping FUNC key to select the display window for
range setting.
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