Passive or Active Climate System for Museum Showcases


Microclimate Control System 

Micorclimate-controlled museum display showcases are much more conservational than traditional display cases.Around the museum objects in the air-tight museum display cases and cabinets,if the humidity and temperature is too high or too low,the objects will be possibly damaged so it is necessary to keep a relative constant humidity and temperature in the display volume.Microclimate within display area are controlled with invisibly-installed passive or active environment controlling system so a perfect and protective internal display and storage environment at constant humidity and temperature comes into being. 


A.PASSIVE MICROCLIMATE CONTROL SYSTEM


As a passive humidity control system,silicon gel dehumidifier like Prosorb or Artsorb in the steel silicon gel tray will blance the relative humidity through absorbing or releasing moisture.The humidity change will accordingly bring a change on temperature.The microclimate chamger is completely discrete from above internal display space and exchange air through invisible air pores.The precision of active microclimate control system can be ±5%.


Prosorb is a preferred silica gel ideally suitable to stabilizing relative humidity within museum display cases or storage cabinets.With longer life span and the exceptional ability of absorbing surpassed moisture and desorbing absorbed moisture,Prosorb can maintain a relatively constant humidity within narrow margins between 40%–60% RH(40%-60% RH is an ideal humidity for museum display cases and cabinets) for long time.Prosorb usually come with loose beads or rigid plastic cassettes.Cassettes are constructed of sturdy polypropylene and vapour permeable non-woven polyester fabric,and are filled with loose beads.Re-conditioning the RH-value of a prosorb cassette can be done easily by size change. 


Advantage of Prosorb


*Free of chlorides-PROSorb contains no lithium chloride, as some other products do (Lithium chloride is a chemical - salt, potentially harmful to many metals. This salt can be transferred to metals in dust or by human touch). PROSorb consists of  97% SiO2 and 3% Al2O3. 

*Low abrasion-PROSorb beads produce less dust than other silica gels (abrasion < 0,05 weight-% according to MIL-D). 

*High bulk density-1 kg PROSorb only needs a volume of ca. 1,5 l (much less than some other silica gels). 

*Long term stability-PROSorb maintains the greater part of its capacity well beyond the 2-5 years when other silica gels have lost a large portion of their capacity. 

*Economical-PROSorb is much cheaper than the other products sold for the same purpose. 

*Temperature dependency-PROSorb  is conditioned in relation to temperature. PROSorb reacts in the same way organic materials do. Therefore there will be no, or little, transfer of water vapour between organic materials and PROSorb if the temperature changes. Under fluctuating temperatures this property protects wooden objects and other organic materials from swelling or shrinking: The conditioning indicated on the labels refers to 20°C. At 10°C the conditioning of the cassettes will be around 1 - 1,5 % RH lower, at 30°C around 1 - 1,5 % RH higher. 



Full-size Cassettes


Dimensions: L 335 mm, W 110 mm, H 44 mm. 

Content:  950 g beads

Consumption:One or more cassettes per cubic metre of air volume are required,up to circumstance application  



Half-size cassettes


Dimensions: L 335 mm, W 110 mm, H 24 mm. 

Content:  500 g beads. 

Consumption: One half-size cassette will be sufficient for 0,7 m3,up to circumstance application



B.ACTIVE MICROCLIMATE CONTROL SYSTEM


Electronic active micro-climate control system makes relative humidity keep between 35% and 70% at precision of 1.5%. Humidity can be identified by pre-set rate so that the control system automatically realizes. Positive pressure air and air filtering stops air pollutants flowing into display cases. 


EBC series of miniclimate units are preferred to be used for climate control in museum display cases, storage cabinets that are classified as air and steam tight.At about the same size as a large shoe box, the combined dehumidifier and humidifier unit is easily hidden from view in a separate compartment within the display showcase. The museum showcase or cabinet is connected to the miniClima EBC using two flexible hoses, forming an airtight recirculation system. Air is extracted from the case into the EBC where it is conditioned before being fed back into the cabinet.


By default the whole process takes place without mixing system air with ambient air. The sensor monitors both temperature and relative humidity and is mounted discreetly inside the display case. Once set in operation, the EBC continuously monitors the condition inside the showcase. If the measured RH value deviates from the required value (set point), the appropriate action is immediately initiated ie: dehumidification by condensing or humidification by evaporation.


Condensate from the dehumidification process is added to the unit's integral 500 ml water bottle which also provides the reservoir for the humidification process. The modes of operation "humidification" and "dehumidification" are indicated on the control panel visual display. Should the set value not be reached within a pre-set time, an alarm is activated. In addition to the integral alarm display on the panel, external remote alarm signalling is available using the potential free contact, thus providing the user with the possibility to install external alarming notification. The reset button quits the external alarm.


There are currently two size EBC's available (master units):


    -    Model EBC 10 - for sealed cabinets not exceeding 3m³

    -    Model EBC 11 - for sealed cabinets not exceeding 5m³  


If the volume of a cabinet exceeds the capacity of a single unit (master), further units (slaves) can be added to the system to increase the performance up to the level required. A slave unit is controlled by it's associated master unit. Each device is delivered ready to install, complete with all necessary hoses, hose connections, cables and a detailed installation and operation manual (electronic format)


Features 


Regulation of the relative humidity in sealed showcases, depository cupboards, switch cabinets, etc..


•No influence on the internal temperature during operation 

•Constant and even distribution of air and humidity levels 

 


Protection of precious exhibits or sensitive components


  •Tight air recirculation system 

  •No cross-contamination with ambient air 

  •Continuous RH control 

  •Optical and switchable acoustic alarms on the device panel 

  •Potential-free contact for an external composite error alarm 

  •Integrated data logger and interface on the device for data storage and read-out on a PC 

  •Free data logger software (Windows) 

 


Dehumidification or humidification - as required


  •Relative humidity accurately measured directly within the cabinet 

  •A programmable digital humidity controller that initiates the appropriate action according to the preset values 

 


Adaptable ·


Two master models available - serving volumes up to 3m³ or 5m³ · Slaves added to master unit to increase capacity


  •Optional accessories to meet individual specification 

 


Simple, easy, effortless


  •Electric supply from a standard 13A socket 

  •No external pipework 

  •Simple to install with minimal maintenance 

 


Unique


  •Compact 

  •Silent in operation 

  •Robust design 

  •Portable

 


Miniclima Datasheet (Series EBC 10/11) 

 


Recommended Volume of the Showcase


Not exceeding 3m³ (EBC 10) Not exceeding 5m³ (EBC 11)


Dehumidification Capacity at Ambient Conditions of 22ºC, 50% RH:2.3 g/h (EBC 10) 3.8 g/h (EBC 11)

Humidification Capacity at Ambient Conditions of 22ºC, 50% RH:5.0 g/h

Sample Achievable Set Point Range at Ambient Conditions of 22ºC, 50% RH.:30 to 75%RH

Permissible Ambient Conditions for Operation and Storage:5 to 35ºC / 15 to 80% RH, non-condensing

Tolerance - typically achievable: Setpoint at 30%RH: ±2%RH (max: ±3%RH) Setpoint at 75%RH: ±3%RH (max: ±5%RH)

Electrical Connection: 90 to 264 VAC / 47 to 440 Hz

System Voltage (Internal):12 VDC

Power Consumption:65 Watts (max)

Weight: 6.6 kg (without accessories, bottle, flexible hoses, cables, etc..)

Noise Emission, free standing, measured from 1 m:48.1 dB(A)

Noise Emission, mounted in a showcase plinth, measured from 1 m:37 dB(A)

Housing Material:Coated steel sheet, 1.5 mm, Pigeon-blue (RAL 5014)



EBC10 (Master Set) 

Constant Humidity Device for air volumes up to approximately 3m³


Standard configuration & scope of delivery (per unit) 


   •RH/Temp sensor, ready to use with housing, cable (2.5m) and RJ45 plug 

   •Mains cable (1.8m) with 3-pin connector and grounded mains plug 

   •3m flexi-hose UFX25 for connection between unit and display case 

   •Flexi-hose connectors (2) with rubber seals for fixing UFX25 to display case 

   •0.5 litre water bottle Water high level alarm 

   •Built-in data logger hardware 

   •miniClima EBC Tool software on CD (1 per order) 

   •Detailed installation & operation manual guide on CD (1 per order) 


Optional Features 


   •2.0 litre water bottle (replaces standard bottle) - also available as upgrade kit 

   •Water low level alarm 

   •Stronger air fan ULV+ upgrade 

 


Optional Accessories 


   •Flanges for fixing flexi-pipe to case material thicker than 6 mm 

   •Air circulation filter FLT25 (requires fan upgrade ULV+) 

   •Air distribution box LVB25 (may also require fan upgrade ULV+) 

   •Serial data cable RS232 for plugging EBC to a PC Serial to USB adapter cable for plugging EBC to PC without RS232 interface 

   •Control cable for using EBC as a Slave 

 


EBC11 (Master Set) 

Constant Humidity Device for air volumes up to approximately 5m³


Standard configuration & scope of delivery (per unit) 


   •RH/Temp sensor, ready to use with housing, cable (2.5m) and RJ45 plug 

   •Mains cable (1.8m) with 3-pin connector and grounded mains plug 

   •5 m flexi-hose UFX32 for connection between unit and display case 

   •Flexi-hose connectors (2) with rubber seals for fixing UFX32 to display case 

   •0.5 litre water bottle 

   •Water high level alarm 

   •Built-in data logger hardware 

   •miniClima EBC Tool software on CD (1 per order) 

   •Detailed installation & operation manual guide on CD (1 per order) 

 


Optional Features 


   •2.0 litre water bottle (replaces standard bottle) - also available as upgrade kit 

   •Water low level alarm 

   •Stronger air fan ULV+ or ULV++ upgrade 

 


Optional Accessories 


   •Flanges for fixing flexi-pipe to case material thicker than 6 mm 

   •Air circulation filter FLT32 (requires fan upgrade ULV+ or ULV++) 

   •Air distribution box LVB25 (may also require fan upgrade ULV+ or ULV++) 

   •Serial data cable RS232 for plugging EBC to a PC 

   •Serial to USB adapter cable for plugging EBC to PC without RS232 interface 

   •Control cable for using EBC as a Slave