User`s guide

RIGOL Chapter 2 Front Panel Operations
2-26 M300 User’s Guide
Offset Compensation
The Offset compensation setting is applicable to the 2WR, 4WR, TEMP (RTD and RTD
4W) and SENSOR (2WR sensor and 4WR sensor) measurement functions. It removes
the affects of small DC offsets of the measurement lead on the measurement result.
When the current measurement function is 2WR, 4WR, TEMP (RTD or RTD 4W) or
SENSOR (2WR sensor or 4WR sensor), enter the fourth step of the channel
configuration guide, use the up/down direction keys to select OCOM and use the
left/right direction keys to select “ON” or “OFF”.
 ON
After selecting “ON”, add two different currents onto the resistance under test
and measure the variation of the voltage between two ends of the resistance.
Calculate the resistance under test by dividing the voltage variation by the
current variation.
 OFF
After selecting “OFF”, no offset compensation will be made.
Tip:
Offset compensation and auto zero are mutually exclusive. After enabling offset
compensation, auto zero (if currently enabled) will be disabled automatically and
vice versa.
AC Filter
AC filter is applicable to the ACV, ACI, FREQ, PERIOD and SENSOR (FREQ sensor)
measurement functions. The AC filter optimizes the low frequency accuracy and
minimizes the AC settling time. The instrument selects slow, medium or fast filter
based on the frequency of the input signal of the current channel as shown in the
table below.
Table 2-3 AC Filter Type
Input Frequency
AC Filter Type
3 Hz to 300 kHz
3 Hz (slow)
20 Hz to 300 kHz
20 Hz (medium)
200 Hz to 300 kHz
200 Hz (fast)
When the current measurement function is ACV, ACI, FREQ, PERIOD or SENSOR
(FREQ sensor), enter the fourth step of the channel configuration guide, use the
up/down direction keys to select Filter and use the left/right direction keys to select
“3Hz”, “20Hz” or “200Hz”. The default is “20Hz”.