Scantron SelfScore Operator's Manual page 20

Chapter 2: Setting Up Your Scanner
10
produces electrical noise which might interfere
with the scanner's electronics.
4. Power source. Use a separate source of power
(with surge protection) for the scanner. The circuit
from the source (breaker box) should not supply
power to a major piece of equipment other than
the scanner and computer (if used).
5. Space. Find a location that allows you plenty of
working surface around the scanner. The scanner
itself is 21 X 15 X 9 in. (54 X 37 X 23 cm).
6. Temperature. Place the scanner in a location with
temperatures between 60° and 85° F (16° and 29°
C).
Scantron SelfScore Scanners