Fluke 8508A User Manual page 86

8508A
Users Manual
Nrf
A numeric value that selects the range for the expected signal. For example, an
10, or even 15.6789, selects the 20 V range. Any valid numeric value cancels autorange.
AUTO
Selects the autorange mode where the multimeter will determine the appropriate range for
the measured signal. If the signal exceeds the maximum capability then
OVERLOAD
registers.
FILT100HZ / FILT40HZ / FILT10HZ / FILT1HZ
Selects the chosen analog filter for the RMS converter, thus allowing measurement to be
made at frequencies down to the chosen filter frequency. One of the four available filters
is always in circuit.
TFER_ON
This selects an internal electronic AC-DC transfer mode for AC measurement which
improves linearity and temperature performance.
TFER_OFF
The instrument can take faster readings at some reduction in accuracy.
DCCP
Selects DC-coupled measurements. Note - DC-coupled should be selected for signal
frequencies less than 40 Hz.
ACCP
Selects AC-coupled measurements.
RESL5 / RESL6
Sets the resolution of the measurement to 5.5 or 6.5 digits.
SPOT_ON / SPOT_OFF
Applies spot frequency corrections (previously calibrated) when the signal frequency is
within 10 % of the spot frequencies.
TWO_WR
Requires only a connection to the INPUT terminals.
FOUR_WR
Requires a connection to the INPUT terminals and to the SENSE terminals.
Measurements of RMS Value and Frequency
For each RMS measurement trigger, a parallel measurement of signal frequency is also
triggered (4.5 or 6.5 digit frequency resolution depending on gate width selection).
Power On and Reset Conditions
1kV, FILT40HZ, RESL6, TFER_ON, ACCP, SPOT_OFF, TWO_WR
4-12
AC Voltage
appears on the front panel and the appropriate bit is set in the device status
of 2,
Nrf
RANGE