5
Cabinet Options
Roll-around cart with storage •
cabinet (suitable for chart
recorder placement)
Cable ports: 2", 4", or 6" •
diameter (50, 100, or 150mm).
One 2" port is standard on the
left wall.
Adjustable stainless-steel •
shelving
Heated viewing window, 6"x6" •
(150x150mm) with interior light
Operational Options
Liquid nitrogen (LN•
2
) injection
boost for faster cooling
Emergency stop 'mushroom' •
button
Overcool protector (overheat is •
standard)
Humidity Options
Solid-state humidity sensor in •
place of wet-bulb
External water supply tank with •
recirculating capability
Water lter (de-ionizing type)•
Extended low humidity range •
to 5°C/15% (see chart, page 7)
Instrumentation Options
RS-485 interface (in place of •
RS-232C)
WatView software upgrade for •
full data-logging capability
Ethernet access for F4•
Yokogawa paperless recorders •
with optional Ethernet
Honeywell circular-chart •
recorders
Yokogawa strip-chart recorders•
Control sensor output for cus-•
tomer use
Cart
Cable port
Paperless recorder
Window
Window
Controlling humidity in a
small environmental cham-
ber can be especially chal-
lenging. ESPEC's expertise
in humidity control brings
intelligent design that is
carefully integrated into the
BTL-433 & BTX-475. The
humidity subsystems are
designed for reliability, con-
venience, and performance:
Options
Instrumentation
Watlow F4 controller
The Watlow F4 is a popular, easy to use, programmer/controller for test cham-
bers. It stores up to 40 different test proles (total 256 steps). Programming
step-types available are: ramp, soak, jump/repeat, auto-start, and end.
The F4 includes RS-232C serial interface and software. Optional remote ac-
cess via Ethernet is possible, as well as software upgrades for full datalogging
capability. One event relay with external output terminal is included for activat-
ing other equipment during operation.
An external steam generator allows expanded •
range and is easy to maintain.
A separate de-humidication coil improves low •
humidity control and range.
The wet-bulb humidity sensor is an accurate •
“primary measurement method”. It is economical,
easy to maintain, and reliable because it has no
risk of failure due to over-saturation.
Direct water supply connection is standard, with •
options for water ltering and external tank.
Emergency stop button
ESPEC humidity system expertise
Steam generator removes for
easy cleaning
(13 pages)
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