Benchtop Test Chambers
Temperature and Humidity
Compact chambers with
extended testing ranges
ESPEC's Criterion benchtop chambers offer two sizes and a variety of testing ranges.
With many options, they can be congured to accommodate your specic requirements.
Their narrow footprint saves valuable lab space.
2
Benchtop Features
(°C)
Extreme temperatures possible
150°100°50°0°-50° 200°
BTZ & BTX
all models
BTU & BTL
all models
-70° 180°
-20° 180°
Temperature Comparison
BTZ-175: 5°C/m
BTZ-133: 3.5°C/m
-100
-50
50
100
150
0
-70
180
30 600 90 120 150 180
min.
Models save valuable lab space
ESPEC introduces our expanded Criterion Series. With a
narrower footprint and increased performance, these test
chambers provide an economical and space-saving solution
for cramped labs needing to do a variety of temperature (and
humidity) testing.
All of the Criterion models have a 19.5 inch wide interior,
which is 3.5 inches more than traditional benchtops, yet the
exterior is 20% narrower. The four cubic foot models have the
largest workspace found in a benchtop unit, while maintaining the smallest exterior footprint.
For additional space savings, the refrigeration system ventilates out the top, and utility connections are on the sides,
thus allowing installation directly against a wall. With the electrical system behind the hinged control panel, minimal space
allowance is required on the sides, as well.
Big chamber performance
The extended temperature ranges of the Criterion series
make testing at extreme conditions possible without buying
a larger, stand-alone chamber. Units are available that go as
cold as -70°C.
Size Comparison
24"
12"
11"
15"
1.5 cu. ft. 4 cu. ft.
The Criterion series has two chamber sizes: 1.5 and 4 cubic
feet. The interior width for both sizes is 19.5 inches. The
exterior footprint for both sizes is the same, just 30" x 33.5".
Temperature Range Comparison
The four cubic foot models also offer a choice of humidity
control. With a range from 10 to 95%, you can maximize your
testing options. A low humidity system can extend this range
even farther. (See humidity chart on page 7 for details.)
Faster temperature changes
The Criterion series can cycle temperatures at rates up to
5°C/minute without requiring liquid nitrogen. Signicant test
time can be saved, as well as creating added thermal stress
on your samples.
To demonstrate performance, ESPEC uses the international
standard IEC 60068 3-5 measured at the supply air. Temperature cycles are run from hot to cold extremes, and the
middle 80% of the transition is timed to determine performance. Your actual cycling results will vary depending on
methodology, including the start and end temperatures, and
the amount of samples loaded.
The BTZ & BTX models have extended cold temperature
ranges without requiring liquid nitrogen. The BTU & BTL still
offer sub-freezing testing capability.
Performance Comparison
The Criterion chambers respond quickly to setpoint changes.
The BTZ-175 can save 30 minutes or more per cycle.
3
Test
Area
Benchtop Features
Space-saving design
An innovative new layout of system components helps make Criterion chambers have
the smallest footprint.
Keeping the refrigeration compressors and
blower fan to the back of the chamber also
reduces noise to the room.
Useful safety features
To protect from the risk of overheating,
there are three levels of protection:
Settable within the programmer1.
An independent settable monitor2.
A thermal fuse3.
In addition, a specimen power terminal
allows the user to safely operate powered
equipment inside or with the chamber. If
the chamber is shut down, the interlocked
device will also be shut down.
Highly reliable operation
The Criterion platform has been reengineered from the ground-up to be
consistent, reliable, and easy to maintain.
ESPEC stands behind the chambers with a
comprehensive one-year parts and on-site
labor warranty.
The chamber's fan continuously circulates conditioned air from the test area to the
plenum (to the right of the test area), where the heaters, cooling coil, and humidity
inlet are located. (BTX-475 model shown).
Quality cabinet construction
ESPEC is meticulous about making a
chamber that is more than just functional.
4
Stainless steel exterior and interior•
Rounded corners for easy cleaning•
Durable thermoformed plastic door and •
control panel
Full thermal break around doorframe •
and door
Rotating door latch is easy and secure•
Dual-layer insulation of berglass and •
expanded foam for thermal integrity
One 2" (50mm) diameter cable port on •
the left, with an impervious, exible
silicone plug
Easy lift-off service panels•
Floor drain and drip-tray under the •
doorframe
A nonmetallic thermal break around the door and doorframe stops transfer of heat/
cold to the exterior. (BTZ-133 shown with optional shelf and window.)
Instrumentation
Watlow F4 controller
The Watlow F4 is a popular, easy to use, programmer/controller for test chambers. 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 access via Ethernet is possible, as well as software upgrades for full datalogging
capability. One event relay with external output terminal is included for activating other equipment during operation.
Options
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•
boost for faster cooling
Emergency stop 'mushroom' •
button
Overcool protector (overheat is •
standard)
) injection
2
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
Cable port
Cart
Window
Window
Paperless recorder
Emergency stop button
ESPEC humidity system expertise
Controlling humidity in a
small environmental chamber can be especially challenging. 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, convenience, and performance:
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.
Steam generator removes for
easy cleaning
5
SPECIFICATIONS - 1.5 c u . f t . MODELS
BTZ-133: 3.5°C/m
BTZ-175(E): 5°C/m
BTU-133: 2°C/m
-100
-50
50
100
150
0
-70
-35
180
60 1200 180 240 300 350
min.
Model BTZ-133 BTZ-175 BTZ-175E BTU-133
Temperature Range
Change Rate
(per IEC 60068 3-5)
Temperature Fluctuation ± 0.5°C per IEC 60068 3-5
Temperature Gradient ± 1.5°C (up to 100°C) per IEC 60068 3-6
Live Load Capacity 200 W to -40°C 300 W to -40°C 200 W to 0°C
Interior Volume 1.5 cu. ft (42 L)
Interior (W x D x H) 19.6" x 11" x 12" (500 x 280 x 300 mm)
Exterior (W x D x H) 30" x 33.5" x 34" (760 x 850 x 865 mm)
Heaters 500 W 1000 W 500 W
Refrigeration 1/3-hp x2 (cascade) 3/4-hp x2 (cascade) 1/3-hp x1 (single-stage)
Air Circulation 100 cu. ft./min. (2.8 m
3.5°C/m heat-up
3°C/m cool-down
-70 to 180°C
(-100 to 354°F)
5°C/m cool-down
5°C/m heat-up
3
/min.)
-20 to 180°C
(-4 to 354°F)
2°C/m heat-up
1.6°C/m cool-down
Site Requirements
Power 115V 1ph 60Hz 16A max.
Weight 300 lbs. (136 kg) 350 lbs. (159 kg) 300 lbs. (136 kg)
Sound Level 65 dBA (1 meter away from door)
208/230V 1ph 60Hz 12A
max.
230V 1ph 50Hz 12A max. 115V 1ph 60Hz 13A max.
Heat to Room 5,100 BTU/Hr 9,000 BTU/Hr 3,600 BTU/Hr
Gravity Drain 3/8" NPT
Room Temperature Performance assured when room temp. is steady, 18 to 27°C (65 to 80°F)
Chart shows example of heating and cooling ramps during
IEC 60068 3-5 qualication (see page 3).
1.5 cu. ft.
(this page)
Accessories included with each chamber:
RS-232 congurator software by Watlow•
Cable port plug•
Power cable with plug (115V is NEMA 5-20, 208/230V is NEMA 6-20)•
Box of wet-bulb wicks (BTL/BTX)•
Operations & programmer manual, parts list & schematics on CD.•
4 cu. ft.
(next page)
6
80
60
40
20
20° 40°
Temp. in °C
60°
80°
%RH
5° / 15%
95
85°
SPECIFICATIONS - 4 c u . f t . MODELS
BTL / BTU-433: 1.5°C/m
BTX / BTZ-475: 2.5°C/m
-100
-50
50
100
150
0
-70
-20
180
60 1200 180 240 300 350
Model BTL-433 BTX-475 BTZ-475 BTU-433
Temperature Range
Change Rate
(per IEC 60068 3-5)
Temperature Fluctuation ± 0.5°C, per IEC 60068 3-5
Temperature Gradient ± 1.5°C (up to 100°C), per IEC 60068 3-6
Live Load Capacity 190 W to 0°C 300 W to -40°C 190 W to 0°C
Humidity Range 10 to 95% RH, per chart below -
Humidity Fluctuation
Interior Volume 4 cu. ft (110 L)
Interior (W x D x H) 19.6" x 15" x 23.6" (500 x 380 x 600 mm)
Exterior (W x D x H) 30" x 33.5" x 47" (760 x 850 x 1150 mm)
Heaters 500 W 1000 W 500 W
Refrigeration 1/3-hp x1 (single-stage) 3/4-hp x2 (cascade) 1/3-hp x1 (single-stage)
Air Circulation 200 cu. ft./min. (5.6 m
-20 to 180°C
(-4 to 354°F)
1.5°C/m heat-up
1.2°C/m cool-down
±5% RH per IEC 60068 3-5
except measured in supply air
-70 to 180°C
(-100 to 354°F)
2.75°C/m heat-up
2.5°C/m cool-down
3
/min.)
-20 to 180°C
(-4 to 354°F)
1.5°C/m heat-up
1.2°C/m cool-down
-
Site Requirements
Power 115V 1ph 60Hz, 16A max. 208/230V 1ph 60Hz 12A max. 115V 1ph 60Hz, 13A max.
Weight 325 lbs. (147 kg) 550 lbs. (250 kg) 325 lbs. (147 kg)
Sound Level 65 dBA (1 meter away from door)
Heat to Room 3,600 BTU/Hr 9,000 BTU/Hr 3,600 BTU/Hr
Gravity Drain 3/8" NPT
Humidity Water Supply
Room Temperature Performance assured when room temp. is steady, 18 to 27°C (65 to 80°F)
Chart shows example of heating and cooling ramps during
IEC 60068 3-5 qualication (see page 3).
Supply: 3/8" NPT, 30-50 psig
Typical usage: 0.5 gallons/day
Purity required: 0.2 μS/cm to 10 μS/cm
-
Controlled humidity range for BTL-433 & BTX-475 models
(without live load). Optional low humidity range shown in red.
7
www.espec.com
4141 Central Parkway, Hudsonville, MI 49426, U.S.A.
Tel: 1-616-896-6100 Fax: 1-616-896-6150
ESPEC EUROPE GmbH
Dachauer Strasse 11, D-80335, Munchen, Germany
Tel: 49-89-1893-9630 Fax: 49-89-1893-96379
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(SHANGHAI) CO., LTD.
F5, ShenHua Financial Building, NO 1 NingBo Road,
Huangpu District Shanghai, 200002, P.R. China
Tel: 86-21-51036677 Fax: 86-21-63372237
ESPEC SOUTH EAST ASIA SDN. BHD.
No.10 -1, Jalan Dagang SB 4/2, Taman Sungai Besi Indah
Off Jalan Sungai Besi, 43300 Seri Kembangan
Selangor Darul Ehsan Malaysia
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ESPEC (CHINA) LIMITED
Suite 618, 6th F, Ocean Centre, Harbour City, Kowloon,
Hong Kong
Tel: 852-2620-0830 Fax: 852-2620-0788
www.espec.co.jp/english
3-5-6, Tenjinbashi, Kita-ku, Osaka 530-8550, Japan
Tel: 81-6-6358-4741
Not for use with specimens which are
explosive or ammable, or which contain
such substances. To do so could be
DANGER
hazardous, as this may lead to re or an
explosion.
BTL-BTZ CRITERION r1
April 2013
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