IBM 4685-L0D, Setup, Operation, And Service Manual

Page: 31 / 80

Environment
Operating temperature and humidity
Operating temperature: 10°C to 40°C (50° to 70°F) (no dew allowed)
Operating humidity: 10% RH to 90% RH (no dew allowed)
Guidelines for ambient lighting
Sunlight and the red content of store lighting can affect the operation of the
scanner. Therefore, lamps used for store lighting in the vicinity of the scanner
should be chosen for low emissions of red light. This page describes some recom-
mended lamp types, as well as some lamp types that should be avoided in the area
of the scanner. The amount of sunlight in the vicinity of the scanner should be
minimized. Although the level of red light is the primary concern, illumination in the
area of the scan windows should not exceed 200 foot-candles (2100 luxes).
Lamp types
The following methods are recommended to reduce the incident light that reaches
the scanner.
Avoid directional-type light fixtures.
Avoid light fixtures that do not have diffusers.
Reduce lighting intensity.
Reduce the number of lamps.
Move the scanner or the lighting fixtures.
Block or shield any incident light.
Position the scanner so that natural light from windows does not hit the scan
windows.
Avoid ceilings less than 3 meters (10 feet) high.
Low red emission (recommended) High red emission (to be avoided)
A. Fluorescent lamps:
1. Daylight
2. Cool white
A. Fluorescent lamps:
1. Deluxe cool white
2. Deluxe warm white
3. Soft white
4. Pink
5. Red
B. High-intensity discharge
1. Clear mercury vapor
2. White mercury vapor
B. High-intensity discharge
1. Warm deluxe mercury vapor
C. Incandescent
1. Tungsten
Chapter 1. Description, specifications, and dimensions
1-7