GW Instek LCR-800 Series User Manual page 24

LCR-800 Series User Manual
Steps of "BIAS" voltage selection (Figure 4-8, please note that the models of
LCR-816 and 826 do not have this function):
!
Press compound key 7 to selects the "INTERNAL BIAS" or "EXTERNAL
BIAS" on the main menu. (If this key function is switched to "INTERNAL
BIAS", the bottom of LCD monitor will display the "INT.B" message. If
the external DC bias is selected, the bottom of LCD monitor will display the
"EXT.B" message.
!
Press compound key 8 to turn either "INTERNAL BIAS" or "EXTERNAL
BIAS" mode "ON" or "OFF" on the main menu.
4-5-2. Test Frequency
The numerical input of test frequency accepts up to 5 digits with decimal. User
can input any desired frequencies, however, the actual frequency executed for the
LCR Meters is always the closest one of the 503 available frequencies. The 503
frequencies can be calculated by the following formulas:
3kHz/n,
60kHz/n,
200kHz/n,
The "nominal value" of an available frequency can be calculated from the proper
one of the three formulas.
The range of test frequency between 12Hz and 10kHz is for LCR-817/827,
between 12Hz and 100kHz for LCR-819/829, and between 100Hz and 2kHz for
LCR-816/826. To select the test frequency, just key in the desired frequency via
these numerical keys, the LCR Meters will take the nearest available test
frequency from the 503 available test frequencies automatically.
Steps of "Test Frequency" selection (Figure 4-9):
!
Press compound key FREQ .
!
Input the desired frequency in kilohertz.
↵ ↵ ↵ ↵
!
Press key.
Note: After test frequency has been changed, the zeroing of "Open/Short
circuit" must be done again for the best accuracy.
where n range is from 13 to 250 (freq. 0.012 to 0.23077kHz)
where n range is from 4 to 256 (freq. 0.23438 to 15kHz)
where n range is from 2 to 13 (freq. 15.385 to 100kHz)
20