3-2 General Information and Specifications NetScan User’s Manual
Although NetScan can acquire temperature rea d ings at a rate of 147 channels/sec, you may also program the unit to
acquire data at specified time intervals using the hh:mm:ss.t format. For the ultimate in flexibility, you may also
program separate pre-and post-trigger sample rates. As an example, NetScan can be programmed to sample data
once per hour and then sample once per second when channel 2 reaches 70°C.
NetScan was designed with the convenience of remote operati o n through the ethernet. If desired, RS-232 or RS-422
serial connections can be used instead of ethernet connections. Chapter 7, Hardware, contains information regarding
non-ethernet use of NetScan.
Statistics such as High, Low, and Last are available for each channel for data reduction. In addition, up to 32 alarms
may be programmed using the programmable high and low limits for each channel.
NetScan’s features include:
• Thirty-two TTL (Transistor-to-Transistor Logic) digital alarm outputs and 8 TTL-compatible digital
inputs.
• Two programmable scan rates: (1) a programmable scan rate for pre-trigger and post-trigger sampling,
and (2) a programmable scan rate for accelerated sampling on-event detection.
• A built in real-time clock which synchronizes the acquisition to the time of day and provides time and
date stamping for trend analysis. Time stamping may be in relative or absolute time.
• 10Base-T Ethernet Interface; with alternate choice of RS-232/422 interface.
• 256 Kbytes of memory, expandable up to 8 Mbytes. If your application must gather large amounts of
data, options are available for expanding the standard 256 kB of memory to 1 MB, 4 MB, or 8 MB.
• Capable of channel expansion up to 128 channels with the use of a CSN/Exp expansion chassis.
Operational Aspects

Data Handling and Triggering

Note: Also, see Software & Hardware table and NetScan Specifications.
Data Handling
Built-in memory
256 Kbyte
10Base-T ethernet interface
3 ethernet
RS-232 serial interface
3 serial, non-ethernet
RS-422 serial interface
3 serial, non-ethernet
Time & date stamping
3
Digital inputs
8
Programmable alarm outputs
32
Triggering
Digital trigger input
3
Analog trigger input
3
Trigger on “time of day”
3
Pre-trigger scan rate
Programmable
Post-trigger scan rate
Programmable