User`s guide

RIGOL Chapter 2 Front Panel Operations
2-24 M300 User’s Guide
Integration Time
The Integration time is the period of time that the instrument’s analog-to-digital (A/D)
converter samples the input signal for a measurement. The longer the integration
time is, the slower the measurement speed and the better the measurement
resolution will be. The shorter the integration time is, the faster the measurement
speed and lower the measurement resolution will be. For the relationship between
intergration time and resolution, please refer to “Specifications”.
Integration time is applicable to DCV, DCI, 2WR, 4WR, TEMP and SENSOR (except
the FREQ sensor) functions. You can specify the integration time in the number of
Power Line Cycles and aperture time.
 Number of Power Line Cycles: the unit is PLC. It can be set to 0.02 PLC, 0.2 PLC,
1 PLC, 2 PLC, 10 PLC, 20 PLC, 100 PLC or 200 PLC and the default is 1 PLC. The
instrument detects the power frequency automatically at power-on, frequencies
within 55 Hz and 66 Hz are regarded as 60 Hz (PLC=1/60 s). Other frequencies
are regarded as 50 Hz (PLC=1/50 s).
 Aperture Time: user-defined integration time. The range is from 33 μs to 4 s.
When the current measurement function is DCV, DCI, 2WR, 4WR, TEMP or SENSOR
(except the FREQ sensor), enter the fourth step of the channel configuration guide,
use the up/down direction keys to select Integ and use the left/right direction keys
to select the desired integration time. The integration time can be set to “User”,
“0.02PLC”, “0.2PLC”, “1PLC”, “2PLC”, “10PLC”, “20PLC”, “100PLC” and “200PLC”. If
“User” is selected, you need to use the numeric keyboard to input the desired
integration time and then press OK. The range is from 33 μs to 4 s.
Input Impedance
The DC input impedance setting is applicable to DCV and SENSOR (DCV sensor)
measurement functions. The default is 10 MΩ. For 200 mV, 2 V and 20 V ranges, you
can select “>10 GΩ” to reduce the affect caused by the loading error of the
measurement object. The current setting is stored in the volatile memory.
When the current measurement function is DCV or SENSOR (DCV sensor), enter the
fourth step of the channel configuration guide, use the up/down direction keys to
select IMP and use the left/right direction keys to select the desired impedance.
 10M
Set the DC input impedance to 10 MΩ. The input impedances are 10 MΩ on all
ranges.
 >10G
Set the DC input impedance to >10 GΩ. The input impedances are >10 GΩ on
the 200 mV, 2 V and 20 V ranges and are 10 MΩ on the other ranges.