User Manual

A-6 Specifications 2400 Series SourceMeter
®
User’s Manual
Case III: Auto-Zero disabled and measuring one function
Figure A-3
Case III Timing Diagram
Trigger Latency: 225µsec max
Source Configuration: 50µsec max
A/D Conversion: [NPLC Setting × (1 / power line frequency)] + 185µsec
Firmware Overhead: 300µsec for Source V
640µsec for Source I
Source On Time ≅ Source Configuration + Source Delay + A/D Conversion +
Firmware Overhead
Example: Source Delay = 0
NPLC Setting = 0.08 PLC
Power Line Frequency = 60Hz
Source On Time ≅ 50µsec + 0 + [(0.08 × 1/60) + 185µsec] + 40µsec
≅ 1.85msec for Source V
≅ 2.2msec for Source I
Trigger
Event
Source
On
Source On Time
Source
Off
Trigger
Delay
Trigger
Latency
Source
Configuration
Source
Delay
A/D
Conversion
(current signal
phase)