Tenney Temperature / Humidity Cycling Chambers
 		    
 





Excess Inventory/Demos Available


Interior of 10 cubic foot chamber
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Classic Tenney Series

Our Classic line of Tenney Series test chambers employ leading edge technology with the most efficient and environmentally friendly test equipment possible. State-of-the art controllers allow precise, effective monitoring and programming of your chamber. An exact blend of insulations ensure efficient chamber operation and maximize floor space by minimizing equipment footprints. Time-proven mechanical refrigeration, in single or cascade systems, allow years of worry-free use. And, environmentally safe CFC-free refrigerants provide the safety you demand.

Features
  • Vapor-tight interior liners made of 100% stainless steel
  • Control system for chambers with humidity provides fully automatic, PID, chamber control through a user-friendly alpha-numeric display
  • Temperature only models come standard with Watlow controls
  • Chambers with humidity are constructed of 100% non-corroding parts and have a low-water protection system
  • Uniform conditions are assured through the use of a vertical-down recirculating conditioning stream


10, 20, and 30 cu-ft models
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    Standard Features 40, 64 Cubic Feet    
CONSTRUCTION
All models feature vapor-tight, continuously welded stainless steel interiors. Structural reinforcement is used at all critical points. Through-wall ports are continuously welded. A combination of
fiberglass and polyurethane insulation surrounds the chamber to maximize insulating characteristics, thus ensuring minimal thermal transfer.

CONTROL SYSTEM FOR HUMIDIFIED UNITS
Proprietary VersaTenn III provides complete automatic chamber control through a user-friendly alpha-numeric display. The control is bidirectional, proportional for heating, cooling, humidification, and dehumidification. The proportional band and the reset are operator-adjustable. Logic circuits automatically select cooling, heating, and
humidity modes as required.

  • 99 step programming capability withstep-interval length of 99 hours.
  • Ability to store up to 10 resident programs.
  • Looping and nested-loop capability.
  • Loops can be repeated up to 255 times. Infinite looping is possible.
  • Time intervals are programmable in seconds, minutes, and hours.
  • Time-of-day start and delayed-start functions up to two weeks.
  • Guaranteed soak feature.
  • Non-volatile memory for up to 5 years of power-off protection of RAM.
  • Digital selection and display of actual conditions.

CONTROL SYSTEM FOR TEMPERATURE-ONLY UNITS
The Watlow F4 controller provides 24-step programming, or may be used as a non-ramping manual controller.

Features include:

  • Data output that sends information directly to a serial printer
  • Time-proportioned output
  • Zero voltage switching
CONTROL TOLERANCE
±0.3°C and ±2% RH typical after stabilization.

RESOLUTION
Setpoint and chamber temperature are displayed with 0.1°C or 0.1°F resolution, and 0.1% RH on humidified units.

SENSORS
A platinum RTD sensor measures temperature. Humidity is measured by an electronic, capacitive sensor that requires no wet wick or water supply. The sensors provide excellent control and display accuracy
with minimum maintenance.

REFRIGERATION SYSTEM
Semi-hermetic (serviceable) compressors, protected with over current and thermal devices are provided for long term reliability.

  • Vapor tanks are ASME certified.
  • Vibration isolators are installed in refrigeration lines to minimize vibration.
  •  All interconnecting piping is hand soldered. The inside of the tubing is purged with dry nitrogen during the soldering process to prevent oxidation.
  • All cold lines are insulated and vapor sealed.
  • Compressors operate continuously (non-cycling) when cooling is required.
  • Systems are water or air-cooled.
  • Water-cooled systems are equipped with water modulating valves.
  • Non-explosive, non-toxic refrigerants are used. The refrigerants and system components are standard items and are commercially available.
HUMIDITY SYSTEM
Tenney VaporFlo®: the humidity system is constructed of 100% non-corroding parts and is equipped with its own lowwater protection system. The system operates at atmospheric pressure and is specially vented to prevent unwanted siphoning.
 
HEATING SYSTEM
Low-mass nichrome, open wire heating elements are used to reduce thermal lag and providerapid response to instrument demand. The
heating elements are isolated from the workspace to reduce radiant influence on the test item. The chamber is protected via a fusible link for heater shutdown in the event of high temperature runaway.
ELECTRICAL
All wiring complies with NEC. Circuit breakers are used throughout the electrical system and are located, along with other electrical components, in a readily accessible integral control panel.
CONDITIONING SYSTEM
Uniform conditions are assured through the use of a vertical-down recirculating conditioning stream. The system draws air from the bottom of the workspace, conditions it as required, then dischargesthe air through a grille at the ceiling level. The compact design of the conditioning plenum allows the Tenney Series to offer the largest possible proportional interior to exterior volume.

DOOR
Since the unit’s chamber is continuously welded, the door remains as the final sealing surface to maintain atmosphere integrity. All doors are equipped with double gaskets that trap air for the purpose of insulation. A unique, energy-efficient system circulates hot gas from the refrigeration system to provide automatic defrost for the door gaskets, thus ensuring pliable gasket conditions and extending gasket life.
Standard Features 10, 20, 30 Cubic Feet
CONSTRUCTION
All models feature vapor-tight, continuously welded stainless steel interiors. Structural reinforcement is used at all critical points. Through-wall ports are continuously welded. A combination of fiberglass and polyurethane insulation surrounds the chamber to maximize insulating characteristics, thus ensuring minimal thermal transfer.

CONTROL SYSTEM FOR HUMIDIFIED UNITS
Proprietary VersaTenn controller provides complete automatic chamber control through a user-friendly alpha-numeric display. The control is bi-directional, proportional for heating, cooling, humidification, and dehumidification. The proportional band and the reset are operator-adjustable. Logic circuits automatically select cooling, heating, and humidity modes as required.

  • 99 step programming capability withstep-interval length of 99 hours.
  • Ability to store up to 10 resident programs.
  • Looping and nested-loop capability.
  • Loops can be repeated up to 255 times. Infinite looping is possible.
  • Time intervals are programmable in seconds, minutes, and hours.
  • Time-of-day start and delayed-start functions up to two weeks.
  • Guaranteed soak feature.
  • Non-volatile memory for up to 5 years of power-off protection of RAM.
  • Digital selection and display of actual conditions.

CONTROL SYSTEM FOR TEMPERATURE-ONLY UNITS
The Watlow F4 controller provides 24-step programming, or may be used as a non-ramping manual controller.
Features include:

  • Data output that sends information directly to a serial printer
  • Time-proportioned output
  • Zero voltage switching
CONTROL TOLERANCE
±0.3°C and ±2% RH typical after stabilization.

RESOLUTION
Setpoint and chamber temperature are displayed with 0.1°C or 0.1°F resolution, and 0.1% RH on humidified units.

SENSORS
A platinum RTD sensor measures temperature. Humidity is measured by an electronic, capacitive sensor that requires no wet wick or water supply. The sensors provide excellent control and display accuracy
with minimum maintenance.

Watlow F4 Controller

  • Guided 256 step, 40 profile ramp and soak programmable memory
  • High definition four line LCD controller interface display
  • Precise process control
  • Simplifies setup and operation
  • Menu customization
  • Enhanced process monitoring
  • High performance 16 bit microprocessor
  • Enhanced environmental chamber control
  • Cascade control
  • Real-time clock with battery backup
  • RS232 Communications

 
 
              

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