1
AM-ENCT ANALOG MULTIPLEXER ENCLOSURE
1. DESCRIPTION
The AM-ENCT (Analog Multiplexer ENClosure
for Thermocouples) consists of a white
fiberglass box, external mounting brackets with
U-bolts, specialized cable conduits, foam
insulation, and aluminum plates for minimization
of thermal gradients, lead wire routing and
multiplexer mounting (Figure 1). These
components are shipped pre-assembled from
Campbell Scientific. If the AM-ENCT is ordered
with an AM416 or AM32 multiplexer, the
multiplexer is mounted in the AM-ENCT at the
factory. If the AM-ENCT and multiplexer are
ordered separately, some user assembly is
required.
The AM-ENCT protects the multiplexer from
windblown dust, rain, and sleet.
The AM-ENCT's insulation and internal
aluminum plates reduce temperature gradients
across the multiplexer terminal strips. Smaller
thermal gradients within the enclosure reduce
thermocouple effects at the thermocouple-
multiplexer junctions and reference temperature
error.
FIGURE 1. The AM-ENCT Enclosure Showing Internal Aluminum Plates and Insulation (Cross-
Hatched)
