Reading Rate
The DMM can operate at 6 or 25 readings per second. Resolution
is a full 4-1/2 digits at 6 readings per second. At 25 readings per
second, the number of digits displayed is the same but the least
significant digit is always 5 or 0.
Guard
The Guard terminal is connected to a shield enclosing the DMM
board. Connecting the Guard terminal may improve some voltage and
resistance measurement accuracy and reduce noise under certain
conditions:
§
When operating the DMM in the presence of high-level radiated
noise (most commonly, stray fields at line frequency);
§
When long test leads are used to measure a high signal source
impedance;
§
When floating measurements are made in the presence of a high
common-mode voltage, or frequency, or both.
To use the Guard, connect its terminal to the DUT’s ground,
common point, or to the – terminal of the DCX-127, in that order of
preference. The peak voltage applied to the guard should not exceed
±500 V.
Panel
Operation
Page 20
DCX-127 Multifunction Module User’s Guide
