Model 140 Temperature Chamber Specifications

Temperature Range

-73°C to +175°C

Control Tolerance

±0.5°C (±0.2°C Typical) (Short-term variations measured at the control sensor after stabilization)

Uniformity

±0.5°C (Variations throughout the chamber after stabilization)

Cool Down Transition Time*
Start Temp	End Temp
Start Temp	+23°C	0°C	-40°C	-55°C	-65°C	-73°C
+23°C	-----	4 min	18 min	25 min	33 min	Ultimate
+50°C	5 min	10 min	25 min	34 min	42 min	Ultimate
+85°C	12 min	18 min	31 min	38 min	45 min	Ultimate
+150°C	25 min	32 min	45 min	51 min	58 min	Ultimate

Heat Up Transition Time*
Start Temp	End Temp
Start Temp	+23°C	+50°C	+85°C	+125°C	+150°C	+175°C
+23°C	-----	1.5 min	7 min	14 min	20 min	Ultimate
0°C	1.5 min	3.5 min	13 min	20 min	23 min	Ultimate
-40°C	6 min	11 min	17 min	24 min	30 min	Ultimate
-55°C	8 min	13 min	19 min	26 min	32 min	Ultimate
-65°C	10 min	14 min	21 min	28 min	34 min	Ultimate

Rate Of Change
To calculate rate of change for a particular condition, take the difference between the Start Temp and End Temp and divide by the Transition Time.
Cool Down Example: From +85°C to -40°C = 125°C / 31 min = 4.03°C/min.
Heat Up Example: From -40°C to +85°C = 125°C / 17 min = 7.35°C/min.

*Note: Transition times are measured after a 2 hour soak at the respective start temperature with an empty chamber, as indicated on the temperature controller, 23°C ambient. Measured with setpoint beyond the start and end temperatures. Does not include the effect of proportional band when approaching setpoint. Performance is reduced by 17% with 50 Hz input power.

Live Load Capacity

+23°C	0°C	-40°C	-55°C	-65°C
1,000 Watts	800 Watts	500 Watts	400 Watts	300 Watts

Refrigeration and Heating System

High Stage Refrigerant	R-404A (Dupont HP-62)
Low Stage Refrigerant	R-508B (Dupont SUVA-95)
Compressors	1.5 HP x 1.5 HP Tecumseh hermetic compressors in a cascade configuration.
Condenser	Air Cooled
Heat of Rejection	14,800 BTUH (maximum rated chamber load at maximum cooling rate from high temperature soak)
Heater Power	1,500 Watts (at 208 V input)
Air Flow	450 cfm

Instrumentation

Temperature Controller	Watlow F4T Touch Screen Controller with RS-232, Ethernet interface, 4.3" color graphic touch screen, OR... Watlow F4 Controller with RS-232 interface, LED readout of temperature, LCD display of other parameters.
Limit Controller	Independent high and low temperature limits. Triggers an audible alarm and shuts down the chamber. Relay contacts provide a safety power interlock for test sample.

Input Power Requirements

Input Voltage	208 V -5/+10%, 1 PH, or 230 V ±10%, Single Phase, 60 Hz Max Current Draw 25 A; Required Service 30 A
Power Cord and Plug	Power cord, 14-feet, with a molded NEMA L6-30P plug
Operation at 50 Hz requires internal transformer option TE-0725. Cooling performance is reduced 17% at 50 Hz.

Physical Characteristics and Safety

Inside Dimensions	22"W x 18"H x 18"D (4 cubic feet)
Outside Dimensions	30"W x 64"H x 42"D (nominal) Door latch adds 3" to width on right side.
Minimum Installed Clearance	18" from the left and right side 24" from the rear
Window Viewing Area	13.5"W x 11.5"H
Access Ports	4" Port on left and right side (two total) Supplied with silicone foam plugs
Weight	Chamber Weight: 700 pounds Shipping Weight: 809 pounds
Sound Level	62 dBA in cooling mode (A-weighted, measured 36" from the front surface, 63" from the floor, in a free-standing environment)

NOTE: Performance is typical and based on operation at 23°C (73°F) ambient and nominal input voltage. Designed for use in a normal conditioned laboratory. Operation at higher ambient temperatures may result in decreased cooling performance. Additional ports and shelves will also affect performance. Operation above 30°C (85°F) or below 16°C (60°F) ambient is not recommended. Performance is reduced by 17% at 50 Hz input power.

Due to continuous product development, specifications are subject to change without notice.