HUMIDITY CHAMBER FOR PLYWOOD SECTION-REFRIGERATED-GMP MODEL-

Model Number : EIE-101RG268

None

Application:

Constant mass conditioning of plywood and other wood product samples before testing and test for dimensional changes caused by humidity as per IS 303: 1989, IS 1659: 2004, IS 710: 2010 and IS 4990: 1993

Construction Details:

CE Certified
Designed as per ICH guidelines to meet, WHO and USFDA requirement
Fulfills storage conditions of 25° C ‑ 60% RH, 40° C ‑ 75% RH, 30° C ‑ 65% RH, 25° C ‑ 40% RH, 30° C ‑ 35% RH
Double wall construction
Interior fabricated from high grade polished stainless steel (S.S. 304).
Exterior body is also fabricated from matt finished Stainless Steel (S.S. - 304 Grade)
Full size polycarbonate sheet inner door to inspect samples without affecting the chamber temperature.
Properties of polycarbonate sheet door (Unbreakable, Un‑scratchable, High temperature resistant, Robust, Air tight and Transparent)
Double walled metal door will have window and rubber gasket with wiper to prevent air leakage.
Electrical wiring as per CE Compliances
Chamber illumination is accomplished by Fluorescent light with door switch.
Cord wire duly tested and inspected with stress factor as per CE standard
Electric Motor located at the back side of unit, protected with safety cover to avoid accident
Standard motor of reputed companies ‑ such as MARATHON/GE/CG/Equivalent Make
User friendly and tactfully designed chamber door and locking mechanism
Aesthetic outer appearance and high quality
capable of achieving uniform temperature/ humidity.

Insulation:

70mm polyurethane insulation (PUF)/ fiberboard to ensure better insulation and less leakage of temperature or RH from inner body to the surroundings.

Air Circulation:

Temperature is maintained by a quiet running blower circulation air throughout the chamber. Forced air circulated vertically down and re circulated throughout the chamber for uniform temperature and humidity.

Humidity:

Humidity created by steam injection method. The boiler tank is fitted in the back side of the chamber for better servicing, Electromagnetic switch for controlling the wet heater from burning off if water level is not adequate. Float valve provided to control water level in the boiler tank.

Heating & Cooling System:

Long lasting SS tubular heaters used as heating element. The stainless steel fins provided to ensure better heat transfer.

Hermetically sealed compressor CFC free compressor (134 A gas) coupled with evaporation coil and condenser.

Trays for samples:

Manufactured from strong S.S. Rods to with‑stand heavy load of test specimens

Such trays also facilitates better air circulation

The distance between trays will be 15‑20 centimeters

Control:

Microprocessor based Digital Auto‑Tune PID temperature and direct RH digital controller. Humidity directly measured in % RH by electronic sensor.

Safety Features:

High temperature safety cut off
Low water level boiler cut off
Electrical overload cut off
Time delay for compressor switch ON
Electrical circuit breaker

Water filling arrangement :

will have metallic (rust free) float valve arrangement in the tank to ensure auto-filling arrangement if it connected with water source or it should have adequate size of tank with water level indicator to ensure continues running for up to 5 days unattended.

Operating conditions:

Since the plywood samples will be kept in the humidity chamber the humidifier will not wet the area of the conditioning chamber since plywood samples, which to be kept for constant mass conditioning, properties may change due to excessive humidity.

Chamber size (inner: wall to wall)	18 Inch X 18 Inch X 52 Inch (L X B X H)
Chamber volume	268 Ltr
Construction	Double walled
Interior	Stainless steel S.S. - 304 Grade(22 SWG)
Exterior	Stainless steel S.S. - 304 Grade(20 SWG)
Insulation	Chamber will be properly insulated to minimize heat losses
Insulation thickness	70mm polyurethane insulation (PUF)/ fiberboard
Humidity and temperature Controlling	The controlling will be PID-SSR based and cut off should be set in PID controller.
Indicator light	Indicator light shall be provided to show the heating/ cooling load.
Operating switches	Provision to turn off heating or cooling in manual mode will be provided with help of toggle/ON-OFF switches.
Accuracy	Temperature accuracy : ± 0.5°C or better, Humidity Accuracy : ± 3% RH
Power Supply	Single phase, 230 V, 50 Hz
Range	The equipment shall be capable of maintaining the temperature from 10° C to 70°C; Humidity 40 to 90% RH .
Least count	Temperature Resolution : 0.1° C , Humidity Resolution: ± 3% RH
Accessories	Will be supplied with voltage stabilizer of adequate capacity suitable for use.
Calibration	Valid calibration certificates from NABL Accredited Lab (with NABL logo) will be provided
Auto stop feature	Auto stop feature will be there to stop the machine at predefined time.
Water filling arrangement	Will have metallic (rust free) float valve arrangement in the tank to ensure auto-filling arrangement.
Additional sensor place	There will be arrangements for additional sensors (but plugged) for data logger etc installation in future.
Sensor Position	Sensor position shall be adequate to ensure uniform distribution of humidity and temperature.
Standard color code for equipment	Blue
Safety	Safety for tripping of system in case of low water level for maintaining humidity.