Kobold AFS-G3 User manual

Operating Instructions
for
Humidity Annex Switch
Model: AFS-G3

AFS-G3
page 2 AFS-G3 K04/0422
1. Contents
1.Contents ........................................................................................................ 2
2.Note .............................................................................................................. 3
3.Recommended usage ................................................................................... 3
4.Operating Principle ........................................................................................ 3
5.Instrument Inspection .................................................................................... 4
6.Mechanical connection .................................................................................. 4
7.Electrical connection ..................................................................................... 4
8.Adjusting the switch point .............................................................................. 5
9.Technical Data .............................................................................................. 5
10.Order Codes ................................................................................................. 6
11.Maintenance ................................................................................................. 6
12.Dimensions (mm) .......................................................................................... 7
13.EU Declaration of Conformance ................................................................... 8
Manufactured and sold by:
Kobold Messring GmbH
Nordring 22-24
D-65719 Hofheim
Tel.: [phone]
Fax: [phone]
E-Mail: [email protected]
Internet: www.kobold.com

AFS-G3
AFS-G3 K04/0422 page 3
2. Note
Please read these operating instructions carefully before unpacking and putting
the unit into operation. Follow the instruction precisely as described herein.
The instruction manuals on our website www.kobold.com are always for currently
manufactured version of our products. Due to technical changes, the instruction
manuals available online may not always correspond to the product version you
have purchased. If you need an instruction manual that corresponds to the
purchased product version, you can request it from us free of charge by email
([email protected]) in PDF format, specifying the relevant invoice number and
serial number. If you wish, the operating instructions can also be sent to you by
post in paper form against an applicable postage fee.
The devices are only to be used, maintained and serviced by persons familiar
with these operating instructions and in accordance with local regulations
applying to Health & Safety and prevention of accidents.
When used in machines, the measuring unit should be used only then when the
machines fulfil the EC-machine guidelines.
3. Recommended usage
Any use of the AFS-G3 which exceeds the manufacturers specification, may
invalidate its warranty and any resultant damage therefore is not the responsibility
of the manufacturer. The user assumes all risk for such usage.
4. Operating Principle
The humidity annex switch, Model AFS-G3, serves to monitor condensed water
formation. The hygroscopic module of the measuring instrument is arranged on
an aluminum base plate so that the measuring element is near the mounting
plate. Protected by the housing, relative humidity close to the dew point allows
condensation to form inside. The aluminium base plate is close to the cooling
tube and transmits cooling energy to the measuring element. The measuring
point can be set inside. The threshold should be adapted for local conditions. The
microswitch trips a potential-free SPDT with silver contact plates rated max 2A /
48 V and 100 mA / 20 VAC/DC. The AFS requires no supply voltage.

AFS-G3
page 4 AFS-G3 K04/0422
5. Instrument Inspection
Instruments are checked before dispatch and should arrive in perfect condition.
In case of damage, please inform your parcel service / forwarding agent
immediately, since they are responsible for damages during transit. Should
damage to a device be visible, we recommend a thorough inspection of the
delivery packaging.
Items included with delivery:
 Humidity Annex Switch, AFS-G3
6. Mechanical connection
If condensed water formation shall be monitored in a room, the most humid
location should first be established. The coldest spot does not necessarily have to
be the most humid location. It should also be borne in mind that any changes
made in the room should not create a different, more humid, spot. The FAS
humidity add-on switch must be mounted in such a way that there is good heat
exchange with the selected position. Please note also that any condensate must
not get into the interior of the housing. Attachment is made by using the supplied
binders, which can be used for pipes with diameters of up to 50mm.The housing
must not be exposed to any outside heat as this may cause erroneous
measurements.
7. Electrical connection

AFS-G3
AFS-G3 K04/0422 page 5
8. Adjusting the switch point
It is important to set the correct switch point for the equipment. A set value that is
too high can cause dew to form, as the conditions at the measuring point are not
constant. Tests have shown that good results are achieved at a switch point of 80
% rh. The switch point can be adapted to the equipment. Open the covering cap
and finely adjust the set value.
9. Technical Data
Physical details
Measuring range: 30-100 % RH
Measuring accuracy: ±3.0 % RH
Recommended
operating range: 50-100 % RH
Switching difference
(microswitch): approx. 4 % RH (at 50 % RH)
Voltage (recommended): 24 V AC
Maximum voltage: 230 V AC
Switch contact
Contact rating, maximum capacity
Resistive load: 2 A, 48 V AC (50000 cycles)
Inductive load*: 0.2 A, 230 V AC
Minimum contact rating: 100 mA, 20 V DC/AC
General
Allowed
Ambient temperature: 0-60 °C
Temperature coefficient: -0.2 % RH/K
(at 20 °C and 50% RH)
Half-life at v=2 m/s: 1.2 min
Electromagnetic compatibility
Noise immunity: EN 50 082-2
Emitted interference: EN 50 081-2
Protection: IP 20
Dimensions: 85 x 55 x 33 mm
Weight: approximately 70 g
Electr. connection: connection terminals
Installation position: any
*Check suitability!

AFS-G3
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10. Order Codes
Humidity Annex Switch, Model: AFS-G3
11. Maintenance
The measuring element is maintenance-free in pure ambient air. Aggressive
media containing solvents can cause measuring errors and failure, depending on
the type and concentration. As with almost all humidity measuring elements,
deposits that eventually form a water-repellent film over the sensor are harmful.
Such substances are resin aerosols, lacquer aerosols, smoke substances
(furnigation) etc.

AFS-G3
AFS-G3 K04/0422 page 7
12. Dimensions (mm)

AFS-G3
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13. EU Declaration of Conformance
We, Kobold-Messring GmbH, Hofheim-Ts, Germany, declare under our sole
responsibility that the product:
Humidity Annex Switch Model: AFS-G3
to which this declaration relates is in conformity with the standards noted below:
EN 60730-1:2012 Automatic electrical controls for household and similar use -
Part 1: General requirements
EN 60730-2-13:2008 Automatic electrical controls for household and similar use -
Part 2-13: Particular requirements for humidity sensing controls
Also, the following EC guidelines are fulfilled:
2014/35/EU Low Voltage Directive
2011/65/EU RoHS
2015/863/EU Delegated Directive (RoHS III)
According to article 2.2 of the EMC directive 2014/30/EU this directive does not
apply to the product mentioned above due to the inherent of its physical
characteristics.
Hofheim, 15 Oct. 2019
H. Peters M. Wenzel
General Manager Proxy Holder