METER WP4C User Manual

9
WP4C
Fan
Fuse well
ON/OFF
switch
Power
cord plug
Lidscrew
RS-232 connection
Figure5 Back view
3.2.1 SAMPLE CHAMBER
The sample chamber has many components (Figure6). An internal thermoelectric module
equilibrates the sample temperature to the headspace of the chamber.
A thermoelectric (Peltier) cooler controls the mirror temperature. A photoelectric cell detects
the exact point when condensation first appears on the mirror by measuring a reflected
beam of light with a photodetector. The photodetector senses the change in reflectance
when condensation occurs on the mirror. A thermocouple attached to the mirror records the
temperature when condensation occurs.
An internal fan circulates the air within the sample chamber to reduce time to equilibrium.
Both dew point and sample surface temperatures are simultaneously measured, eliminating
the need for complete thermal equilibrium.

METER WP4C Specifications

General

Brand	METER
Model	WP4C
Category	Measuring Instruments
Language	English