TestEquity Model 155 Temperature Chamber Specifications


Temperature Range -20°C to +130°C
Display Resolution 0.01°C
Control Tolerance ±0.08°C, ±0.05°C typical (Short-term variations measured at the control sensor after stabilization)
Uniformity ±1.0°C (Variations throughout the chamber after stabilization, at least 2-inches from the walls, in the range of -15°C to +100°C)
Temperature Sensor Individual Platinum RTD sensors for air control and part temperature control
Temperature Controller F4T Touch Screen Controller with sensor for Part Temperature Control, Integrated Limit Control with independent sensor; Ethernet Modbus TCP and RS-232 Modbus RTU interfaces; USB host port for transfer via flash drive of data log files, profile configuration files, and controller configuration files.
Safety Limit Controller Independent thermocouple sensor, integrated into the F4T controller, FM approved. User setable high and low temperature limits. Chamber turns off when limits are exceeded. A thermal fuse provides backup overtemperature protection.
Heat Up Transition Time (empty)* 5°C/minute typical
Cool Down Transition Time (empty)* End Temperature
Start Temperature +23°C 0°C -5°C -10°C -15°C -20°C
+85°C 11 min 19 min 21 min 25 min 30 min Ultimate
+23°C -- 6 min 8 min 11 min 15 min Ultimate

Rate Of Change
To calculate the average 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 (empty): From +85°C to -10°C = 90°C / 25 min = 3.6°C/min average rate of change.

*Note: Transition times are measured after a 30 minute 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.

Live Load Capacity +23°C 0°C -5°C -10°C -15°C -20°C
200 W 150 W 125 W 100 W 75 W 35 W
Inside Dimensions 12" W x 8" H x 10" D (0.55 cubic feet, 15.73 liters)
Outside Dimensions 16.38" W x 21.88" H x 22.72" D (nominal)
Minimum Installed Clearance 12" (304 mm) from the rear
Cable Slot 3" x 1.75" Cable Slot on left and right side (two total). Supplied with silicone foam plugs.
Weight 88 pounds. Shipping weight: 126 pounds.
Sound Level 59 dBA in cooling mode (A-weighted, measured 36" from the front surface, 63" from the floor, in a free-standing environment)
Air Flow 90 CFM
Heater Power 250 Watts
Cooling System Variable speed DC rotary compressor, microgroove heat exchangers, non-CFC and non-explosive refrigerant.
Heat of Rejection 3815 BTUH (Maximum rated chamber load at maximum cooling rate from high temperature soak.)
1219 BTUH (After stabilization when holding holding low temperatures without an energized test sample.)
Input Power 90 to 132VAC / 6A max. or 180 to 264VAC / 3 A max., 50/60 Hz (rear panel switch for voltage range)

NOTE: Performance is typical and based on operation at 23°C (73°F) ambient and nominal input voltage. This product is designed for use in a normal conditioned laboratory. Operation at higher ambient temperatures will result in decreased cooling performance. Operation above 27°C (80°F) will have a significant impact on low-temperature operation.

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