Electric Dehumidifier
ROSAHL
Product Specification

Model : M-3M1R

RYOSAI TECHNICA CO.,LTD.

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Application
This specification document is applied to model M-3M1R of Electric Dehumidifier "ROSAHL".

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OutlineDrawing No.

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4.

5.

: RB-R30X0035(Refer to page 5)

Specifications
1) Applicable Volume2) Element Terminal Voltage
3) Power Consumption4) Weight5) Operating Temperature6) Operating Humidity
7) Storage Temperature
8) Storage Humidity9) Connecting Type
10) RoHS Directive::::::::::Ability and Characteristics
1) Dehumidifying Performance2) Rated Current
3) Inrush Current: 2.9g/day (at 30 deg C, 60%RH) *at the shipment: 1.0A or less (at 30 deg C, 60%RH): 6A (at 30 deg C, 60%RH) *Reference value~ 0.35 m3
2.9 ~ 3.3V DC
2W (at 20 deg C, 60%RH)
90g-10 ~ 50 deg C
90%RH or less-20 ~ 60 deg C
90%RH or less
Push connector (Refer to page 5)
Less than the legal limit of the ten substances

LifeThe dehumidifying performance will reduce during use. (How much it reduces depends on theoperating environment and conditions.)
By the specifications of the applied product, the permissible level of the degradation of theDehumidifier changes, therefore the life is defined as half-life of performance.
Half-life of performance : About 4~6 years*Continuously operation at 18 deg C (Annual average temperature in Japan)

6.

Indication* Indicated the following items.
1) Model Name
2) Manufacturing Number
3) Polarity (+/-)
4) Dehumidifying side

7.

Delivery Inspection*Tested the following inspection items.
1) Appearance2) Dehumidifying Performance: Dehumidifying check (100% inspection)
Ability measurement (sampling inspection)3) Indication
4) State of Packaging

8. Accessory
Gasket9.

: 1 piece

Packaging Specifications
ROSAHL are packed in the box to avoid breakage failure while transport.

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Precautions for Use of ROSAHL
1) Attach a protective cover as needed not to touch the dehumidifying / humidifying surface
of a membrane with a hand and an object.
2) Confirm the dehumidifying / humidifying surface of a membrane not to get a wrong direction before
installation. Attaching ROSAHL by mistake will adversely affect several things in the container.
3) Keep strictly the following about power supply to ROSAHL(1) Do not reverse the polarity. Confirm a polarity indication of ROSAHL.
Dehumidification changes to humidification when you get a wrong polarity, which may result inan adverse effect on several things in the container. Furthermore, it causes a chemical reaction ina porous electrode of cathode side and it causes the trouble of ROSAHL.
(2) ROSAHL usually has a big rush current when the power is turned on.
Therefore, we recommend the following power supply.
(3) Use a dedicated power supply for each membrane. When multiple membrane are connected inseries or parallel, the trouble of one membrane may cause all other membranes to be disabled.
(4) The water vapor go through a membrane of ROSAHL. If you switch off a power supply, outside
water vapor is returned into a container and the humidity is restored.
Table 1. Recommended Power Supply Specifications
Rated output voltage
3V DC
Rated output current
2A
Overcurrent protection function* NoteRequired
Overvoltage protection function
Required
Output voltage variation
0.1V or less
Ripple noise
0.2V or lessIn accordance with the specifications ofOthers
commercially available power supply
Note : Use a constant or fold-back current limiting regarding overcurrent protection function.
You cannot use the power supply with the Hiccup mode current limiting type, because
the voltage more than 2V is necessary for ROSAHL when an overcurrent protection
function worked. Also ROSAHL may not work correctly depending on a characteristicof fold-back current limiting.
4) A container must be an airtightness container. If a container has low airtightness and moisturepermeable material, the results may not be what you expected.
5) Attach ROSAHL in the center of the inner side surface of a container with a gasket.
(Do not attach it on a top or bottom surface.)
6) If you use ROSAHL with a gasket that contains an antioxidant, crystal materials may be generated on
the surface of a membrane. When you choose a gasket, evaluate it enough.
7) Do not use silicon-based sealing materials to improve airtightness of a container.
(Silicon-based sealing materials generate oxime gas and siloxane gas.
As a result, the performance of ROSAHL reduce in a short term.)
Additionally, when using any other sealing materials, ROSAHL must be attached after sealing materials
are completely cured. Volatile substances generated during curing affect the performance of ROSAHL.
[Recommended products] : modified silicon caulk (Konishi Co., Ltd.)
8) Do not expose a moisture discharging side of a membrane to water. When using outdoors, be sureto attach a cover or vent filter to protect a membrane from water or insects.
9) Attach a moisture-permeable sheet to a membrane to protect ROSAHL from much dust or oil mists.
[Recommended products] : Vent Filter TEMISH S-NTF2131A-S06 (Nitto Denko Corporation)10) Keep the moisture discharging side of a membrane well ventilated.
11) Do not use ROSAHL with vapor phase corrosion inhibitor or insect repellent.
Do not use ROSAHL in a place having high density of organic gas.
12) Do not do remodeling. ROSAHL may break down.

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RB-PS21010-A13) When you prepare a gasket, we recommend a sponge packing having closed-cell structure(hardness : 10 or less) of the EPT rubber (ethylene propylene rubber). When you use a highhardness packing, there may be a gap between installation plate and gasket. If there is a gap,
the performance of ROSAHL may not be shown enough. Please evaluate it carefully.
In addition, If you use a silicon rubber, you need to vulcanize a gasket (200 deg C / 6 hours)
not to quickly degrade the performance of ROSAHL.
Note : The silicon gasket assembled in ROSAHL is vulcanized. (conditions : 200 deg C / 6 hours)[ Precautions in the Use for the Storage Cabinet ]1. When you use ROSAHL to dehumidify into the storage cabinet, do not store volatile rust preventive orthings that organic gas volatilizes. The volatile gas which is released from goods reacted at a membrane's
anode and new harmful gas is produced. As a result, not only it causes decrease in performance of theROSAHL, but also it might adversely affect on goods in the storage cabinet. We cannot guarantee even ifharm occurs to the stored valuables under the influence of new produced gas.
Please evaluate enough when you use ROSAHL for the storage cabinet.
2. The maker who produces and sells storage cabinet equipped with ROSAHL should explain that enoughfor end users using the storage cabinet.

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