Shielding; Measuring Frequency And Period; Trigger Level And Measurement Errors - Aktakom ABM-4082 User Manual

ABM-4082
Note: Source current flows from the INPUT HI to INPUT LO terminals
Note: Source current flows from the INPUT HI to INPUT LO terminals
Figure 3-3
3.4.2

Shielding

To achieve a stable reading, it helps to shield resistances greater than 100kΩ. Place the resistance in a
shielded enclosure and connect the shield to the INPUT LO terminal of the instrument electrically.
3.5

Measuring Frequency and Period

Model DMM frequency measurement range: 5Hz to more than 1MHz.
Model DMM period measurement range: 0.2s to less than 1μs.
Input signal range: 100 mV AC to 750V AC RMS.
The instrument uses the volts input terminals to measure frequency. The AC voltage range can be changed
with the RANGE
full-scale range.
3.5.1

Trigger Level and Measurement Errors

Frequency and Period apply a zero-crossing trigger, meaning that a count is taken when the signal crosses
the zero level.
24
Two- and Four- wire Resistance Measurements
and keys. However, the signal voltage must be greater than 10% of the