Kobold AFK-E Series User manual

AFK-E_13_e // Modification rights reserved // 302379
MANUAL
HUMIDITY / TEMPERATURE
TRANSMITTER
Series AFK-E

We do not accept warranty and liability claims neither upon this pub-
lication nor in case of improper treatment of the described products.
The document may contain technical inaccuracies and typographical
errors. The content will be revised on a regular basis. These changes
will be implemented in later versions. The described products can be
improved and changed at any time without prior notice.
© Copyright
All rights reserved.
USA
FCC notice:
This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a residential installa-
tion. This equipment generates, uses and can radiate radio frequency energy and,
if not installed and used in accordance with the installation manual, may cause
harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
Caution:
Any changes or modifications not expressly approved by the party responsible for
compliance could void the user's authority to operate this device.
CANADIAN
ICES-003 notification:
This Device B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 du
Canada.

TABLE OF CONTENTS
HARDWARE
1. GENERAL 4
1.1 Symbol assertion 4
1.2 Safety instructions 4
1.3 Environmental information 4
2. PRODUCT DESCRIPTION 4
3. INSTALLATION 5
3.1 Mounting of model 2S 5
3.2 Mounting of model 2D 5
4. ELECTRICAL CONNECTIONS 6
4.1 Connection diagram 6
4.2 Connection diagram alarm module 6
5. OPERATING COMPONENTS 6
5.1 Circuit board 6
5.1.1 Configuration interface (USB) 6
5.2 Display module / Option 7
6. ALARM MODULE 8
7. MAINTENANCE 8
7.1 Fuse replacement 9
7.2 Cleaning 8
7.3 Self-diagnosis and error messages 9
8. REPLACEMENT PARTS / ACCESSORIES 10
9. TECHNICAL DATA 11
10. DISPOSAL 12
11. DECLARATION OF CONFORMANCE 13

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1. GENERAL
The manual is a part of the scope of supply and serves to ensure proper handling and optimum functioning
of the instrument. For this reason, the manual must be read before start-up.
In addition, the manual is for all personnel who require knowledge concerning transport, setup, operation,
maintenance and repair.
The manual must not be used for the purpose of competition without a written consent and must also not be
forwarded to third parties. Copies for personal use are permitted. All information, technical data and illustrations
contained in these instructions are based on information available at the time of publication.
1.1 Symbol assertion
This symbol indicates a safety instruction.
These safety instructions should always be followed carefully. By not following these instructions injuries of
persons or material damage could happen. We do not accept liability.
This symbol indicates a note.
These notes should be observed to achieve optimum functioning of the equipment.
1.2 Safety instructions
General Safety Instructions
• Excessive mechanical loads and incorrect usage should always be avoided.
• Take care when unscrewing the filter cap as the sensor element could be damaged.
• The sensor is an Electro Static Discharge sensitive component (ESD). When touching the sensor
element, ESD protective measures should be followed.
• Grip sensors only at the lead wires.
• Installation, electrical connection, maintenance and commissioning should be performed by qualified personnel only.
Safety instructions for use of the alarm module with voltages >50V
• To insulate the alarm module from the low-voltage side of the transmitter, the
partition provided for this purpose must be fitted in the lower section.
• During operation of the instrument the modular housing must be completely closed.
• The protection class of an opened housing corresponds to IP00 and direct contact
with components carrying dangerous voltages is therefore possible. In general, work on live components
should be avoided and when absolutely necessary, should be performed by qualified personnel only.
1.3 Environmental aspects
The equipment is developed with due consideration to all resultant environmental issues. When you dispose
the equipment you should avoid environmental pollution.
For disposal of the transmitter the individual components must be sorted with care. The
housing consists of recyclable polycarbonate or metal (aluminium, Al Si 9 Cu 3). The electronics must be
collected as electronic scrap and disposed of according to the regulations in force.
2. PRODUCT DESCRIPTION
The humidity/temperature transmitters provide multifunctionality, highest accuracy and simple installation and
maintainance. The modular housing enables a user-friendly operation and a fast replacement of the sensor
unit for service purposes. By selecting a suitable housing version the transmitters can be used for the entire
range of humidity measurement applications:
•Model 2S with remote sensing probe
•Model 2D with remote sensing probe for pressure-tight applications up to 20bar (300psi)

150
(6”)
57 (2.2”)
90
(3.5”)
135
(5.3”)
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3. INSTALLATION
Mounting of housing
1. Drill the mounting holes according to the mounting template.
2. The bottom part of the housing is mounted with 4 screws (screw
diameter: < 4.2mm (0.2”) ; not included in the scope of supply).
3. Connection of the transmitter (see Hardware, chapter 4 "Electrical
connections").
4. Mounting of the middle part and cover with 4 screws (included in
the scope of supply).
dimensions in mm (“)
3.1 Mounting of model 2S
Working range of sensor probe: -40...180°C (-40...356°F)
Working range of electronics: -40...60°C (-40...140°F)
with display: -20...50°C (-4...122°F)
Mounting of the remote sensing probe - model D (12mm):
Using the stainless steel mounting flange (refer to accessories) it is pos-
sible to mount the probe on the outer wall of the measuring chamber.
The depth of immersion is adjustable.
For roof installations use the drip water protection (refer to accessories)
to protect the sensor head and elements against condensed water.
The sensor probe must be mounted horizontally or vertically,
pointing downwards. When possible, a drip sheet should be fitted
for each mounting.
3.2 Mounting of model 2D
Working range temperature: -40...180°C (-40...356°F)
pressure: 0.01...20 bar (0.15...218psi)
Working range of electronics: -40...60°C (-40...140°F)
with display: -20...50°C (-4...122°F)
The sensor probe must be mounted horizontally or vertically
pointing downwards. Where possible, a drip sheet should be fitted
for each mounting.

6
1. Display: These pinboards are determined for connecting the display module.
2. Diagnosis LEDs: see chapter 7.3 "Self diagnosis and error messages"
3. USB-Interface: USB-Interface for service use
5.1 Circuit board
After removal of the housing cover, the following operating components on the circuit board may be
accessed for adaptation of the transmitter to the desired configuration.
5. OPERATING COMPONENTS
4.2 Alarm module connection diagram
4.1 Connection diagram
Rel 1 Rel 2
4. ELECTRICAL CONNECTIONS
RS232
1. Display
2. LED's
3. USB
5.1.1 Configuration interface (USB)
The Micro-USB connector is located in the center of the PCB as shown in the figure under section 5.1.
By removing the housing cover the configuration interface can be used.
The USB configuration cable is not included in the scope of supply.
The configuration software can be downloaded from our homepage www.kobold.com using the product
search for "AFK-E".

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SI SI US
RH Rel. humidity % %
T Temperature degC °F
h Enthalpy kJ/kg ftlbf/lb
r Mixture ratio g/kg gr/lb
dv Absolute humidity g/m³ gr/ft
Tw Wet-bulb temperature degC °F
Td Dew-point temperature degC °F
e Water vapour partial pres. mbar psi
1. MEASURAND:2. UNITS:3. MEASURAND SELECTION:
5.2 Display module / Option:
Press the ∆or
∇ button to
select the
desired
physical
quantity.
- REL1 / REL2: Status Relay
- "ERROR 01....10": see Hardware, chapter 7.3 “Self-diagnosis and error messages”
5. MEASURED VALUES:
from up to units
Humidity RH 0 100 % RH
Temperature T -40 (-40) 180 (356) degC (°F)
Dew-point temperature Td -40 (-40) 100 (212) degC (°F)
Frost-point temperature Tf -40 (-40) 0 (32) degC (°F)
Wet-bulb temperature Tw 0 (32) 100 (212) degC (°F)
Water vapour partial pressure e 0 (0) 1100 (15) mbar (psi)
Mixture ratio r 0 (0) 999 (9999) g/kg (gr/lb)
Absolute humidity dv 0 (0) 700 (300) g/m3 (gr/f3))
Specific enthalpy h 0 (0) 2800 (999999) kJ/kg (lbf/lb)
The measurement ranges indicated above can be set to individual requirements using the
configuration software.
The dominant value of the appropriate quantity is displayed in this field. For the factory
configuration, the measured values may fall between the measurement ranges shown below.
6. STATUS LINE:

8
RH: 63.0%
REL1
RH: 63.0%
REL2
6. ALARM MODULE
The alarm module can be used for alarm and error issues and other simple control
functions. This module can be configured using the configuration software.
The user thus has the option of setting the measurand to be monitored (RH, T, Td,...) and the
threshold hysteresis for each relay. (For the procedure, see the Configuration sofware, chapter 5.2
“Relay”)
max. switched voltage / max. switched current: 250 VAC / 6A
28 VDC / 6A
Minimum load: >100mA / 12V
Schaltpunkt
switching point
[%,°C,kj/kg,
g/kg,g/m³,mbar,...]
Relais Status
relay status
70
62
Ausschaltpunkt
switching off Hysterese
Einschaltpunkt
switching on
EIN
ON
AUS
OFF
8%
NC
NC
11
11
C
C
12
12
NO
NO
13
13
Schaltpunkt
switching point
[%,°C,kj/kg,
g/kg,g/m³,mbar,...]
Relais St
atus
relay status
70
62
Ausschaltpunkt
switching off Hysterese
Einschaltpunkt
switching on
EIN
ON
AUS
OFF
8%
NC
NC
14
14
C
C
15
15
NO
NO
16
16
Switching relay 1:
Switching relay 2:
If relay 1 has tripped (ON),
then REL1 is displayed.
If relay 2 has tripped (ON),
then REL2 is displayed.
7. MAINTENANCE
7.2 Cleaning
The sensing elements are highly robust which makes cleaning very easy. Shake the
sensing elements for max. 2 min. in industrial Isopropyl alcohol and after that in water. Let
them dry free. Do not touch or rub the active surface of the sensing elements!
7.1 Fuse replacement
If the green LED on the PCB is not flashing with the supply
voltage switched on, check the fuse and replace if required.
Fuse secondary: 250mA / T UL248-14
Nominal voltage: 250V
Replacement types:
Series: MSTU 250 Manufacturer: Schurter Order No.: 0034.7109
Series: 374 Manufacturer: Littelfuse Order No.: 374 0250

99
7.3 Self diagnosis and error messages
Self diagnosis via LEDs on the circuit board:
•Green LED
flashing ⇒Supply voltage applied / Microprocessor is active
•Red LED
constantly lit ⇒Error category 1 = non-critical error, can be solved by the user
flashing ⇒Error category 2 = critical error, return the device for service
• Blue LED
constantly lit ⇒analogue output is set to voltage.
• Orange LED
constantly lit ⇒analogue output is set to current.
Self diagnosis via display (where available):
Error description Error code (display) Error category Recommended action
Voltage out short circuit - output 1 only*
ERROR: 01
1
Check wiring of outputs
Voltage out short circuit - output 2 only*
Voltage out short circuit - both outputs*
Current loop open - output 1 only
ERROR: 02 Check wiring of outputs
Current loop open - output 2 only
Current loop open - both outputs
RH sensor dirty ERROR: 03 Cleaning sensor
Hardware error
ERROR: 05
2Return the faulty unit for
service
ERROR: 06
ERROR: 08
Temperature measurement failure ERROR: 07
Humidity measurement failure ERROR: 09
ERROR: 10

1010
8. REPLACEMENT PARTS / ACCESSORIES:

1111
9. TECHNICAL DATA
Measurement values
Relative humidity
Working range1) 0...100% RH
Accuracy *) (including hysteresis, non-linearity and repeatability)
-15...40°C (5...104°F) <90% RH ± (1.3 + 0.3%*mv) % RH
-15...40°C (5...104°F) >90% RH ± 2.3% RH
-25...70°C (-13...158°F) ± (1.4 + 1%*mv) % RH
-40...180°C (-40...356°F) ± (1.5 + 1.5%*mv) % RH
Temperature dependence of electronics typ. ± 0.01% RH/°C (0.0055% RH/°F)
Response time with metal grid filter at 20°C / t90 < 15 s
Temperature
Temperature sensor element Pt1000 (Tolerance class A, DIN EN 60751)
Working range sensing head -40...180°C (-40...356°F)
Accuracy (typ.)
Temperature dependence of electronics typ. ± 0.005°C/°C
Outputs 2)
Two freely selectable and scaleable analogue outputs 0 - 5V -1mA < IL < 1mA
0...100% RH / xx...yy°C respectively 0 - 10V -1mA < IL < 1mA
4 - 20mA RL< 500 Ohm
0 - 20mA RL< 500 Ohm
Alarm outputs 2 x 1 switch contact
250V AC / 6A 28V DC / 6A
Serial interface RS232C
Max. adjustable measurement range 2)3)
from up to units
Humidity RH 0 100 % RH
Temperature T -40 (-40) 180 (356) degC (°F)
Dew-point temperature Td -40 (-40) 100 (212) degC (°F)
Frost-point temperature Tf -40 (-40) 0 (32) degC (°F)
Wet-bulb temperature Tw 0 (32) 100 (212) degC (°F)
Water vapour partial pressure e 0 (0) 1100 (15) mbar (psi)
Mixture ratio r 0 (0) 999 (9999) g/kg (gr/lb)
Absolute humidity dv 0 (0) 700 (300) g/m3 (gr/ft3))
Specific enthalpy h 0 (0) 2800 (999999) kJ/kg (lbf/lb)
General
Supply voltage SELV 8...35V DC SELV = Safety Extra Low Voltage
SELV 12...30V AC (optional 100...240V AC, 50/60Hz)
Current consumption - 2x voltage output for 24 V DC/AC: typ. 30 mA
- 2x current output typ. 70 mA
for 100-240VAC: typ. 2 VA
Pressure range for pressure tight probe 0.01...20bar (0.15...300 psi)
System requirements for software WINDOWS XP or later; USB interface
Housing / protection class AlSi9Cu3 / IP65; NEMA 4
Cable gland M16 x 1.5 cable Ø 4.5 - 10 mm (0.18 - 0.39")
Electrical connection screw terminals up to max. 1.5mm² (AWG 16)
Working and storage temperature range of electronics -40...60°C (-40...140°F)
-20...50°C (-4...122°F) - housing with display
Electromagnetic compatibility according to EN61326-1 EN61326-2-3
Industrial Environment
FCC Part15 ClassB ICES-003 ClassB
1) Refer to the working range of the humidity sensor. 2) Can be easily changed by software. 3) Refer to accuracies of calculated values
*) The accuracy statement includes the uncertainty of the factory calibration with an enhancement factor k=2 (2-times standard deviation). The accuracy was
calculated in accordance with EA-4/02 and with regard to GUM (Guide to the Expression of Uncertainty in Measurement).
∆°C
°C

1212
Operating range humidity sensor
The gray area shows the allowed measurement
range for the humidity sensor.
Operating points outside of this range do not
lead to destruction of the element, but the
specified measurement accuracy cannot be
guaranteed.
Relative humidity [%RH]
Temperature [degC]
10. DISPOSAL
Notice!
•Avoid environmental damage caused by media-contaminated parts.
•Dispose of the device and packaging in an environmentally friendly manner.
•Comply with applicable national and international disposal regulations and environmental regulations.
Batteries
Batteries containing pollutants are marked with a symbol consisting of a crossed-out garbage can and the
chemical symbol (Cd, Hg, Li or Pb) of the heavy metal that is decisive for the classification as containing
pollutants:
Cd1Hg2Pb3Li4
1 "Cd" stands for cadmium.
2 "Hg" stands for mercury.
3 "Pb" stands for lead.
4 "Li" stands for lithium
Electrical and electronic equipment

1313
11. DECLARATION OF CONFORMANCE
10.EU Declaration of Conformance
We, KOBOLD Messring GmbH, Hofheim-Ts, Germany, declare under our sole
responsibility that the product:
Humidity/Temperature Transmitter Model: AFK-E
to which this declaration relates is in conformity with the standards noted below:
EN 61326-1:2013 Electrical equipment for measurement, control and
laboratory use -EMC requirements -Part 1: General requirements
EN 61326-2-3:2013 Electrical equipment for measurement, control and
laboratory use -EMC requirements -Part 2-3: Particular requirements -Test
configuration, operational conditions and performance criteria for transducers with
integrated or remote signal conditioning
EN IEC 63000:2018 Technical documentation for the assessment of electrical
and electronic products with respect to the restriction of hazardous substances
Also, the following EC guideline is fulfilled:
2014/30/EU EMC Directive
2011/65/EURoHS (category 9)
2015/863/EU Delegated Directive (RoHS III)
Hofheim, 27 April 2021
H. Volz M. Wenzel
General Manager Proxy Holder

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www.kobold.com