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TestEquity LLC, Environmental Chamber Division Environmental Chambers for Temperature and Humidity Testing
   TestEquity Model 140 Temperature Chamber - Detailed Specifications

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Temperature Range -73C to +175C
Control Tolerance 0.2C (Measured at the control sensor after stabilization)
Uniformity 0.5C (Variations throughout the chamber after stabilization)

Cool Down Transition Time*

Start Temp

End Temp

+23C 0C -40C -55C -65C -73C
+23C ----- 4 min 18 min 25 min 33 min Ultimate
+50C 5 min 10 min 25 min 34 min 42 min Ultimate
+85C 12 min 18 min 31 min 38 min 45 min Ultimate
+150C 25 min 32 min 45 min 51 min 58 min Ultimate

Heat Up Transition Time*

Start Temp

End Temp

+23C +50C +85C +125C +150C +175C
+23C ----- 1.5 min 7 min 14 min 20 min Ultimate
0C 1.5 min 3.5 min 13 min 20 min 23 min Ultimate
-40C 6 min 11 min 17 min 24 min 30 min Ultimate
-55C 8 min 13 min 19 min 26 min 32 min Ultimate
-65C 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 +85C to -40C = 125C / 31 min = 4.03C/min.
Heat Up Example: From -40C to +85C = 125C / 17 min = 7.35C/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
+23C 0C -40C -55C -65C
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 @ 208V Input


Temperature Controller

Watlow F4 Controller with RS-232 interface, LED readout of temperature, LCD display of other parameters (standard).
Watlow F4T Touch Screen Controller with RS-232, Ethernet interface, 4.3" color graphic touch screen (optional).

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

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 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 or side surface, 63" from the floor, in a free-standing environment)

NOTE: Performance is typical and based on operation at 23C (73F) 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 30C (85F) or below 16C (60F) ambient is not recommended.

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