Omega Engineering OMB-CHARTSCAN 1400, User Manual

Page: 21 / 273

ChartScan User’s Manual ChartScan - Unit Startup and ChartView Tutorial 1-15
Acquisition Dialog Box, Normal Mode
◊
(19) Click “Okay” to exit the Acquisition dialog box. Note that we are using the Acquisition default settings,
and the Data Destination default settings in this tutorial (as shown in the above figure).
Note: The following table provides a brief description of various acquisition setup parameters.
Acquisition Setup
Parameter Options
Event Configuration Trigger: Set a trigger scan in the Acquisition by using one of the following:
Keyboard - Use Console Trigger dialog box to start trigger scan.
Note: If the Keyboard Trigger is selected the use of Pre-trigger is disabled.
External TTL - Use an external signal to start the trigger scan.
Channel Value - Use specified value of a given channel.
Alarm - Use an Alarm value to start the trigger scan.
Absolute Time - Use a time of day to start the trigger scan.
Note: If Absolute Time is selected, the use of Auto Re-arm is disabled .
Stop: Set a stop scan in the Acquisition by using one of the above selections or Count (as
specified below). Keyboard isn’t applicable. If a MultiScan or ChartScan is connected
and High-Speed Single-Channel (Burst Mode) is selected, then “Count from trigger” is
the only Stop available for the event configuration.
Count: Specify a number of scans to be read before a stop scan is set.
Acquisition Parameters
Scan Counts: Specify the number of scans in an acquisition
Pre-trigger
Post Stop
Average weight: Average weight can be specified only when in the Normal Mode. The value for
the average weight determines the number of samples to be averaged when in
Normal Mode. Values of 1, 2, 4, and 8 are for high-speed multiple channel
applications for thermocouples and DC voltages where noise filtering is not an
issue.
Values of 16, 32, 64, 128, and 256 are recommended for AC noise rejection.
Scan Intervals: Time between scans (frequency of scans)
Pre-trigger and Post Stop
Post-trigger
Use one Interval
High Speed Setup:
Allows for channel and scan rate entries for high-speed, single channel mode.
Note: These parameters cannot be altered while an acquisition is in progress.