Scantron OpScan 4ES Operator's Manual page 32

Chapter 1: Scanner Basics
iNSIGHT 4ES Standard Features
12
• Power
• 100-240 volt operation: 100-240 volts AC (-
10%, +6%): 47-63 Hz; US 3-prong plug; 15 amp
dedicated circuit
• Communications
• Image operation using USB 2.0 (Can operate
OMR asynchronously using a virtual com port
with user-defined protocol)
• Operation
• Read Heads: 200 dots per inch (dpi) resolution,
up to 256 levels of grayscale per pixel; pencil
and ink
• Scanning Rate: 2,300 sheets per hour in OMR
with Imaging mode, or 2800 sheets per hour in
OMR only mode. (Actual scanning rate
depends on quantity of data read from the
form and the amount of processing done on
the data while scanning).
Scantron OpScan 4ES and NSIGHT 4ES Scanners