Tenney Classic Series Temperature and Humidity Cycling Chambers
The Tenney Classic Series of temperature and humidity test chambers deploys environmentally friendly technology that uses CFC-free refrigerants. The time-proven mechanical refrigeration systems are available in single or cascade systems and allow for years of worry-free use.
The Classic Series temperature and humidity test chambers are available in 10, 20, 30, 40, and 64 cubic feet models, all of which are available with single or cascading refrigeration systems.
Temperature and Humidity Cycling Chamber Features
In addition to the standard features found in the Tenney temperature and humidity test chambers product family, the Classic Series features:
- Semi hermetic refrigeration system
- Vertical recirculation conditioning system
- Automatic defrost for door gaskets
- Control tolerance between ±0.3°C and ±2% RH typical after stabilization
- Non-corroding parts on all humidity capable units
- Low water protection
Temperature and Humidity Cycling Chamber Control Systems
The following control systems are available on the Classic series of temperature and humidity test chambers :
- VersaTenn control system is standard equipment
- Watlow control system on temperature only models
- Tenney VaporFlo® humidity system
Temperature and Humidity Cycling Chamber VaporFlo® Humidity System
The Tenney VaporFlo® humidity system operates at atmospheric pressure and is vented to prevent unwanted siphoning.
Temperature and Humidity Cycling Chamber 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.
A dry capacitance type humidity sensor is used to measure chamber relative humidity. The sensor is mounted in the head of a stainless steel probe that is 8.5” long, 0.5” diameter, and is protected by a sintered filter. The probe is mounted in the downstream air of the conditioning section.
In response to humidity levels, the sensor modifies a signal from the humidity transmitter circuit board. This signal is converted by the transmitter to a 0 to 5 Volt DC signal, representing 0 to 100 percent relative humidity, and is sent to the humidity controller / channel. The humidity transmitter is powered by a small 15 Volt AC transformer.
Temperature and Humidity Cycling Chamber Refrigeration System
The refrigeration system used on the Classic series of temperature and humidity test chambers uses non-explosive and non-toxic refrigerants that are commercially available. The semi-hermetic compressors protect against over current and thermal devices to provide long-term reliability.
All interconnecting piping is hand soldered. The inside of the tubing is purged with dry nitrogen during the soldering process to prevent oxidation.
Features include:
- ASME certified vapor tanks
- Vibration isolators on refrigeration lines to minimize vibration
- Insulated and vapor sealed cold lines
- Continuously operating, non-cycling, compressors
- Water-cooled or air-cooled systems available
Temperature and Humidity Cycling Chamber Options- Interior lighting
- Adjustable and removable shelving
- Recording instruments
- Additional ports, gloves, etc.
- Rubber tire casters: 5" or 6" (3" steel are standard)
Temperature and Humidity Cycling Chamber Control and Interface
- Control up to 10 chambers with LinkTenn software for Microsoft Windows
- RS422, 423, 232 or 485 interface assemblies
- IEEE interface
- 6-event relay board @ 1 amp each
- Remote console for instrumentation
Humidity Systems
- Water demineralization system
- 5 gallon water reservoir for humidity system
- Water recirculation system for humidity chambers
- External dryer for obtaining humidity as low as 5% (to 20°C)
- GN2 purge system
Temperature Systems
- Thermocouple or electrical feed through terminals
- Thermally insulated and heated viewing window
Refrigeration Systems
- Water-cooled refrigeration system
- Air cooled refrigeration system
- Refrigeration taps and pressure gauges
Safety
- Alternate power supply wiring
- Automatic CO2 or LN2 cooling boost system
- Redundant thermal protection and alarm system
40 or 64 cubic feet Options Only
- Alternate refrigeration or heating systems for faster temperature change rates or increased product load handling capabilities
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