Technical Specification for Environmental Chamber
1 Description of Function
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1.1
Technical Bidders
Specs
Deviation
quoted
if any
by bidder
1. Environmental chamber provides an atmosphere for Conditioning and
Testing Tobacco and Tobacco Products
2 Operational Requirements
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2.1
.Materials of construction
1. The chamber must be monobloc construction which comprises all systems
necessary for operation.
2. The outer housing must be made of good quality galvanized steel sheet which is
inside and outside primered and painted to a standard finish with high quality
materials
3. The exterior surface shall have high wear resistance.
4. A photograph / brochure showing inside and outside details of the chamber
should be supplied.
2.2
Features:
Castors
The test equipment shall be capable of moving easily to different locations using 4
castor wheels of which 2 are preferably fitted with brakes
Dehumidification
To avoid condensation of moisture on the test specimen the chamber should
have a dehumidification system using the high stage refrigeration circuit and
preferably be activated automatically whenever the chamber set point is changed
from a colder temperature to a hotter temperature below 25ºC.
Humidification
Automatic refresh feature for stable / supply of humidification water
.
3 Technical Specifications
Technical Bidders
Specs
Deviation
quoted
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by bidder
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3.1
Temperature:
Temperature Variation :
Stability
Temperature Range
Sensor
Controller
Temperature Display
Adjustable Alarm Limit :
Average heating rate
Average cooling rate
Resolution
3.2
Technical Bidders
Specs
Deviation
quoted
if any
by bidder
± 0.2°C
:
± 0.1°C
:
15°C- 50°C
:
Thermocouple
:
PID
:
LCD
To be provided
:
5 ºC / min.
:
5 ºC / min.
:
0.5ºC
Humidity:
Variation (RH %)
Stability (% RH)
Range (working)
Controller
Display
Alarm RH
Water Refrigerator
Auto de-frosting
Light Control
Light Intensity
Resolution
:
±2
:
0.1
:
15-75 % RH
:
PID
: LCD
:
To be provided
:
(approx) 15L
:
Yes
:
To be provided
:
12000 Lux (at center)
:
25000 Lux (at sides)
:
0.5%RH
3.3
Instrumentation & control
The chamber should be provided with microprocessor /computer control and
monitoring system.
• Continuous display of set value & actual value of temperature and humidity.
• Selection of manual and automatic modes.
• Should be possible to create temperature test programmes with immediate
graphical check of programming.
• Should print any test programme in text format and graphical format.
• Should refer to and modify any previously created test programmes and delete
test programmes that are no longer needed.
• Should have integrated programmer with a programme memory..
• Programmes should easily be stored and recalled at any time and activated
without the necessity of operator having prior programming knowledge.
• Should have digital set point and actual display of temperature.
• Should have built in capability to restart the test chamber after power failure.
• Should have the capability of recording of graphic printout of set and actual
value of test carried out.
• System should have RS232/422/.485/IEEE 488 interfaces for communication
with PC.
•The display and control panel should be at the front.
• 4 digital switching channels should be provided as an option.
• Potential free Changeover contact at 24V, 0.5A for Malfunction signal should be
provided as an option.
3.4
Chamber
Dimensions:WxDxH (mm)
Exterior :960 x 920x1840 (approx)
Interior Volume:Approx 400 L
Water Outlet Pressure :
2 Bar
Drain/ basin
:
To be provided
Door
:
1. The door must be of lockable type with hinges
2.The exterior of the door must be made of
galvanized steel sheet primered inside and outside
and painted with good quality paint outside,
3. The inner side of the door must be made of non
magnetic stainless steel.
4. The door must be provided with double
continuous seal rings of silicone rubber material.
5. The door is to be provided with a micro switch
to have an interlock between the conditioning fan
and the door opening. That is the conditioning fan
should stop once the door is opened
3.5
Insulation
The insulation material must be of low ‘k’ factor, high density and nonhygroscopic nature. The insulation shall be multi- layered with double vapor
barrier. Asbestos free mineral fiber insulation is preferred
.
3.6
Inspection window
The door is to be provided with a multipane toughened glass inspection window
with built in heaters. The size of the window should be 200mm x 200mm
(minimum)
.
3.7
Refrigeration system
The refrigeration system must be
1. Air cooled condenser.
2. Cascade system (High stage and low stage semi hermetic compressors).
3. Environment friendly refrigerants (R404A / R23) and special oil.
4. Evaporator should have copper tubes and copper fins, with anti-oxidation
coating
5. The compressor should be on anti vibration mounts (acoustic isolation) for safe
efficient long running
4 System Configuration Accessories, spares and consumables
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4.1
Spares
•
•
•
•
Technical Bidders
Specs
Deviation
quoted
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by bidder
One set of door gaskets.
5 kg each of refrigerant gases (R404A) & R-23 with cylinder.
5 liters compressor oil used for the refrigeration compressors.
A set of recommended spares with a list indicating respective quantity and
unit price.
5 Environmental factors
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5.1
The unit should be capable of being stored continuously in ambient temperature in
the range of 0 -50deg C and relative humidity in the range of 15-90%
5.2
Thu unit should be capable of operating in ambient temperature in the range of
10-42 deg C and relative humidity of less than 70%
Technical Bidders
Specs
Deviation
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6 Power Supply
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6.1
1.Power input to be 220-240VAC, 50Hz fitted with BIS plug (ISI mark)
Technical Bidders
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7 Standards, Safety and Training
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7.1
Safety & Protection: Safety and protection devices
• Over temperature protection for test specimen.
• Software temperature limiter for min. / max. test chamber temperature .
• Protection for excess pressure in cooling circuit HP/LP cut out.
• Protection for overloaded motor of test space fan and compressors (thermal
cutout).
• All power lines should have fuse protection.
• The control and monitoring system should be protected against input electrical
surge and spike.
• Drain for condensate and cleaning water.
• Earth point.
• System protection class should conform to IP 20.
• All wiring should comply to EC/other applicable standards.
• Power interrupt socket, time meter Hour counter for recording total running time
of the chamber.
• The Power consumption by safety & control devices shall be as low as possible.
• Pressure gauges for high / low stage.
7.2
Should be FDA , CE,UL or BIS approved product
7.3
Comprehensive warranty for 2 years and 5 years AMC after warranty
7.4
Manufacturer/Supplier should have ISO certification for quality standards.
Technical Bidders
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7.5
Should be compliant with IEC 61010-1:(or any international equivalent e.g. EN/UL
61010) covering safety requirements for electrical equipment for measurement
control and laboratory use
7.6
The bidder shall assure supply of spares for a minimum period of 10 years from
the date of supply
8 Documentation
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8.1
User/Technical/Maintenance manuals to be supplied in English.
8.2
Certificate of calibration and inspection.
8.3
List of Equipments available for providing calibration and routine
Preventive Maintenance Support as per manufacturer documentation in
service/technical manual.
8.4
List of important spare parts and accessories with their part number and
costing.
8.5
Compliance Report to be submitted in a tabulated and point wise manner
clearly mentioning the page/para number of original catalogue/data
sheet. Any point, if not substantiated with authenticated
catalogue/manual, will not be considered.
8.6
Log book with instruction for daily, weekly, monthly and quarterly
maintenance checklist.
The job description of the hospital technician and company service
engineer should be clearly spelt out
8.7
Current User’s / performance list to be provided
Technical
Specs quoted
by bidder
Bidders
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any