Model 1027C 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)
±1.0°C (Variations throughout the chamber after stabilization)
Cool Down Transition Time (empty)*
Start Temp End Temp
+23°C 0°C -20°C -40°C -55°C -65°C
+23°C ----- 1.5 min 7.5 min 11 min 14 min 18 min
+85°C 9 min 15 min 21 min 28 min 35 min 40 min
+150°C 23 min 30 min 37 min 45 min 53 min 60 min
Cool Down Transition Time (with 80 lb. aluminum load)*
Start Temp End Temp
+23°C 0°C -20°C -40°C -55°C -65°C
+85°C 15 min 26 min 35 min 48 min 59 min 68 min
+150°C 32 min 41 min 50 min 61 min 69 min 76 min
Heat Up Transition Time (empty)*
Start Temp End Temp
+23°C +50°C +85°C +125°C +150°C +175°C
+23°C ----- 1.5 min 7 min 14 min 20 min 25 min
0°C 1.5 min 3.5 min 13 min 20 min 23 min 31 min
-40°C 6 min 11 min 17 min 24 min 30 min 35 min
-55°C 8 min 13 min 19 min 26 min 32 min 37 min
-65°C 10 min 14 min 21 min 28 min 34 min 39 min
Heat Up Transition Time (with 80 lb. aluminum load)*
Start Temp End Temp
+23°C +50°C +85°C +125°C +150°C +175°C
0°C 5 min 13 min 23 min 36 min 45 min 55 min
-40°C 11 min 19 min 29 min 42 min 51 min 61 min
-65°C 22 min 32 min 44 min 61 min 71 min 81 min

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 (empty): From +85°C to -40°C = 125°C / 28 min = 4.5 °C/min.
Cool Down Example (with 80 lb. load): From +85°C to -40°C = 125°C / 48 min = 2.6°C/min.
Heat Up Example (empty): From -40°C to +85°C = 125°C / 17 min = 7.35°C/min.
Heat Up Example (with 80 lb. load): From -40°C to +85°C = 125°C / 29 min = 4.3°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 -20°C -40°C -55°C -65°C
2,900 Watts 2,600 Watts 2,300 Watts 1,750 Watts 1,450 Watts 1,050 Watts

Refrigeration and Heating System

High Stage Refrigerant R-404A (Dupont HP-62)
Low Stage Refrigerant R-508B (Dupont SUVA-95)
Compressors 3.5 HP x 3.5 HP Copeland scroll compressors in a cascade configuration
More about Scroll Compressors >>
Condenser Air Cooled
Heat of Rejection 27,500 BTUH (maximum rated chamber load at maximum cooling rate from high temperature soak)
Heater Power 4,000 Watts @ 208 V input
Air Flow 830 cfm
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.
Chart Recorder (Optional) Honeywell DR4300 Series. One pen, 10" circular chart. Mounts in lower front door.

Input Power Requirements

230 V ±10%, 60 Hz, 3 Phase Max Current Draw 39 A; Recommended Service 50 A
208 V -5/+10%, 60 Hz, 3 Phase Max Current Draw 35 A; Recommended Service 45 A

Input may be configured for 230 V or 208 V in the field by changing jumpers. Three phase load is balanced. Call for other voltages or 50Hz operation. Performance is reduced by 17% with 50Hz input power.

Customer power source must be hard-wired to the chamber by a qualified electrician. Power cord and plug is not included.

Physical Characteristics and Safety

Inside Dimensions 40" W x 32" H x 36.5" D (27 cubic feet)
1016 mm W x 813 mm H x 927 mm D (765 liters)
Outside Dimensions 49" W x 73.25" H x 63" D (nominal)
1244 mm W x 1860 mm H x 1600 mm D
Door latch adds 3" to width on right side. Circulator motor and housing adds 6" to height - may be removed for move-in.
Minimum Installed Clearance 18" from the left and right side
24" from the rear
Window Viewing Area 16" W x 13" H
Access Ports 4" Port on left and right side (two total)
Supplied with foam plugs
Weight Chamber Weight: 1,560 pounds
Shipping Weight: 1,744 pounds

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.

Due to continuous product improvements, specifications subject to change without notice.