Mini One Humidity Controller

The Mini One is a miniature humidity control device for museum showcases and storage enclosures. This quiet, robust and extremely efficient unit can reliably control relative humidity in individual or multiple enclosures.

The Mini One satisfies the demanding standards of preventive conservation and modern museum design. It incorporates the most recent developments in electronic humidity control, noise suppression, and pollution abatement ? and is built on the heritage of a series of microclimate control devices extending back to 1978.

This positive pressure microclimate control system will typically maintain the relative humidity level in a sealed enclosure to within less than two percent of your target relative humidity. Depending upon the ambient temperature conditions and enclosure construction, stable relative humidity levels of less than thirty to over eighty percent can be attained.

As the Mini One can be installed in a number of configurations for differing applications, performance characteristics will vary with installations and enclosures. In its most common application, the unit will provide a constant flow of filtered air at a pre-set relative humidity level. This airflow will maintain stable humidity levels and purge pollutants in a tightly sealed museum display or storage enclosure of up to five cubic meters / one hundred and fifty cubic feet. 

Features:

• Accurately controls humidity in new, retrofitted, or imperfect showcases
• Unique constant RH and volume input creates extremely stable environmental conditions
• Supplies single or multiple enclosures with no modifications
• Reliably supplies constant humidity flow over very wide range (<30% RH to > 80% RH)
• High efficiency filter on input removes particulate and gaseous pollutants
• Positive pressure air supply sweeps out pollutants, and prevents their influx into the enclosure
• Units may be located at a distance from showcases
• Air delivery system is unobtrusive and easily hidden
• Automated bypass valve seals case in overload conditions
• Calibrated electronic humidity sensor provides stable and accurate data
• Unique sensor location guarantees accurate delivery and easy diagnostics
• Computer and Building Management System interfaces are standard features
• Electronic control system automatically adjusts to enclosure size
• Low water warning light and alternate alarm connections are standard features
• Suitable for humidity control in nitrogen supply (low oxygen) applications
• Multiple Mini One units can be used on a single enclosure without master/slave complications
• Substantial built-in reservoir is standard, with options for external reservoir tank or other feed source
• Chemical-free bactericide system (energized TiO2) controls biological threats
• Secondary feed port for multiple case feeds is included as a standard feature
• Externally vented cooling system maintains cool showcase and optimum operating conditions
• Two module system permits flexible installation in showcase bases and light attics
• Multiple cases (gallery or museum wide) can be supplied by a single pump or nitrogen generator
• Pump module can be remotely placed far from the showcase
•  Low power consumption
• Easily maintained on site
• Whisper quiet operation

GENERAL OPERATING PRINCIPLES

Ambient gallery air is filtered for pollutants and drawn into the unit. This air is pressurized and di­rected through a proprietary mechanism that adjusts the relative humidity to the preset value. This air is directed through a small flexible tube to an input port in the showcase. Air flow to the enclo­sure is constant, and in normal applications the air is delivered only at the preset relative humidity.

In normal configurations the unit provides humidity control for a single tightly sealed enclosure, usually not exceeding five cubic meters. In these applications the unit will typically provide ex­tremely accurate humidity control; the unit neither adds nor subtracts moisture from the air in the showcase ? it gently feeds a steady stream of air into the showcase at the target humidity to displace the existing air and pollutants in the enclosure, which is forced out past gaskets and through small existing leaks.

ALTERNATIVE OPERATING MODES

The Mini One can be operated in a variety of modes, depending on enclosure characteristics and acceptable control limits. Output from one unit may be distributed to more than one showcase, or multiple units may be used on a single showcase when more capacity is needed. The unit may be placed immediately beneath or next to the showcase, or at some distance away. The pump module may be separated from the main module at some distance, or multiple units may be fed by a single remote pump or nitrogen generator.

INPUT PORT VALVE / SENSOR

Input air from the humidification module is monitored at the input port valve/sensor in the show­case. An integrated automatic valve ensures that the showcase air feed is stopped should the humid­ity exceed preset limits. The combination of sensor and valve makes troubleshooting easy in new installations.

INSTALLATION SUPPORT

Sales and installation of the Mini One are fully supported by Keepsafe Microclimate Systems, with years of experience in planning, guiding and assisting in remote system installations and troubleshooting. The unique system of separate modules and components allows for great freedom in application, as well as simple progressive testing procedures during installation. System planning, on-site assistance, commissioning and training are available

SPECIFICATIONS:

• Dehumidification Capacity at ambient conditions of 22ºC, 65% RH: > 6 gm/hour (basis 30% RH output)
• Humidification Capacity at ambient conditions of 22ºC, 35% RH: >9.5 gm/hour; basis 85% RH output, (eg humidification chamber applications)
• Humidification Capacity at ambient conditions of 22ºC, 5% RH: >9.5 gm/hour; basis 55% target RH, (eg dry nitrogen feed applications)
• Standard Components: Unit consists of humid­ity adjustment module, a pump module, one sensor/valve, supply hoses, signal and power cable(s), operator?s manual
• Installation Options: Modules may be stacked, placed adjacent to each other, or separated by up to 10 m (30 ft) or more. Neither module need be in the controlled showcase
• Control Module Dimensions: W 38.5 cm (15.2 in) X D 32.5 cm (12.75 in) X H 16.5 cm (6.5 in)
• Pump Module Dimensions: W 23 cm (9.1 in) X D 23 cm (9.1in) X H 16.5 cm (6.5 in)
• Maximum Power Consumption: 240 Watts
• Typical Power Consumption: 140 Watts
• Power Source: 105 ? 120 or 210 ? 230 Volts, 50 or 60 Hz
• System Internal Voltage: 12 Volts DC
• Shipping Weight: 14 kg (31 lb)
• Output: Constant airflow of 30% to 80% RH, with a variation of +/- 1% @ 22 degrees C (typical)
• Output Volume: 24 cubic meters / day (850 cubic feet / day) - typical
• Output Pressure: < 2.5 inches H2O / 600 Pa
• Multiple Feeds: a second output port and valve control port is standard (for optional use)
• Operating Temperatures: 15 to 27 degrees C (60 to 80 degrees F) (Ambient temperatures will affect control capacities)
• Sensor Element: Capacitive thin film sensor
• Sensor Reading Accuracy: +/-2% over mid range
• Sensor Repetitive Accuracy: +/-1%
• Bypass Valve: Automatic, typically triggered at +/- 3% from target (adjustable) to isolate showcase
• Pollution Filters: Accepts 3M 6000 Series filter cartridges.
• Communication: RS- 485 for data capture and unit control (with optional software)
• Low Water Indicator: LED indicator on 1 m (3 ft) flexible lead (+ dry contacts for optional connections)
• Biocides: Copper components, chilled compartments and TiO2 mesh
• Sensor/Valve Dimensions: Port size: 27 mm (1.06?) min diameter, max wall thickness 36 mm (1.42?)
• Stacked Dimensions: When stacking pump mod­ule above main module, H is 33 cm (13 in). Units need not be stacked or even adjacent. Allow ample lateral room for connections and mainte­nance
• Ventilation: Two vents must be supplied and ex­haust hose connected as per operator?s manual
• Drainage: Any condensate that is not captured and sequestered in the reservoir will be directed to a drip pan (not supplied). In almost all situa­tions, this will evaporate quickly into the unit?s exhaust air, and no drain will be required.