Chapter 4 Installation; Ambient Conditions; Requirements - Thermo Scientific 3906 Operating Manual

Thermo Scientific
Installation

Ambient Conditions

Requirements

The environmental chamber must only be operated in a location that meets all of the
ambient condition requirements listed below:
Installation location indoors in dry areas free from drafts.

The following minimum distances must be observed: lateral 150 mm, front 1100

mm, back 250 mm and top 250 mm.
The dust pollution may not exceed the contamination category 2 based on EN

61010-1. Using the environmental chamber in an atmosphere with electrically
conductive dust is prohibited.
The room must be equipped with appropriate ventilation. Solid, level, fire-proof

surface; no flammable materials opposite to the rear panel of the environmental
chamber.
The electrical circuitry of the environmental chamber has been designed for an

operating height of up to 2000 m above sea level.
If a high-voltage test is to be performed on the unit, it must first be heated for around

30 minutes at 50°C.
The ambient temperature must be within 18°C - 26°C (64°F - 79°F) with light

module and 16°C - 32°C (61°F - 90°F) without light module, see "Specifications".
Devices that produce excessive amounts of heat must not be placed near the

environmental chamber.
Power line voltage variations must not exceed ±10 % of the nominal voltage.

Transient surges must lie within the range of levels that normally occur in the power

supply system. The impulse withstand voltage based on surge category II of IEC
60364-4-443 shall be applied at the nominal voltage level.
Relative humidity up to 70%, non condensing, at an ambient temperature of 28°C,

decreasing linearly up to 55% at 32°C without light module, up to 70%, at 28°C with
light module.
Please note: Should condensation exist, wait until the moisture has evaporated

completely before connecting the environmental chamber to a power source and
powering up.
Installation |
Chapter 4
Model 3900 Series | 4-1