Akytec PVT10 User manual

akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel: [phone] · www.akytec.de
PVT10
Humidity and temperature transmitter
User guide
PVT10_2016.11_0214_EN
© All rights reserved
Subject to technical changes and misprints

akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel: [phone] · www.akytec.de
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Contents
1Description......................................................................................................................................................2
2Warranty..........................................................................................................................................................3
3Specification...................................................................................................................................................4
4Safety...............................................................................................................................................................5
5Installation.......................................................................................................................................................6
6Emergency mode............................................................................................................................................8
7Restore factory settings ................................................................................................................................9
8Maintenance and cleaning...........................................................................................................................10
9Transport and storage.................................................................................................................................11
10 Scope of delivery......................................................................................................................................10
Appendix A Dimensions ...................................................................................................................................11
Appendix B Connection to the Computer.......................................................................................................12
B.1 Communication parameters....................................................................................................................12
B.2 Modbus registers.....................................................................................................................................12

Description
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: [phone] · www.akytec.de
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1 Description
Humidity and temperature transmitter PVT10 is intended for measurement of relative
humidity, temperature and dew point of air ensuring high accuracy and stability. The
transmitter is designed for indoor use (at home and office, in HVAC and building automa-
tion systems, e.g. in hotels, museums or datacenters). Compact wall-mount plastic enclo-
sure provides natural sensor ventilation.
The instrument utilises digital fully calibrated and temperature compensated combined
relative humidity and temperature sensors with excellent repeatability and stability.
Two freely configurable 4-20 mA or 0-10 V analog outputs can be used to connect the
transmitter to secondary devices like display panels or controllers. Each output can be
independently assigned either to temperature, relative humidity or dew point channel.
RS485 interface with industry-standard Modbus RTU protocol allows direct Fieldbus net-
working of the transmitters.

Warranty
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: [phone] · www.akytec.de
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2 Warranty
This product is warranted to be free from defects in material and workmanship for a peri-
od of one year from the date of original sale. During this warranty period Manufacturer
will, at its option, either repair or replace product that proves to be defective. This warran-
ty is void if the product has been operated in conditions outside ranges specified by Man-
ufacturer or damaged by customer error or negligence or if there has been an unauthor-
ized modification.

Specification
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: [phone] · www.akytec.de
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3 Specification
Table 3.1 General technical data
Sensors
combined RH and T sensors
Measurement ranges
0...95% RH /-20...+70 °C
Resolution
0.1% RH / 0.1 °C
Accuracy
RH = 20…80%
±3%
RH = 5…20% or 80…95%
±4%
T = -20...+70 °C
±0.5 °C
Response time
approx. 15 s
Self-diagnostics
full functionality check at start-up
Warm-up time, max.
1 s
Power supply
12 / 24 (11.5…30) V DC
Power consumption, max.
1.5 W
Analog outputs
2x 4-20 mA / 0-10 V, user settable, freely con-
figurable scales
Fieldbus
Interface
RS485
Protocols
Modbus RTU
Galvanic isolation
none
Permitted load
4-20 mA
< (Us –10.5 V) / 22 mA
0-10 V
> 250 kohm
Cable connections
screwless terminal blocks
Enclosure
white ABS, wall mount, IP20
Dimensions
71 x 71 x 27 mm
Operating environment
industrial indoor places
Operating conditions*
See Fig. 3.1
CE marking
Conformance to 2014/30/EU and EN61326-1
requirements
* Normal operating conditions of the device are shown in Fig. 3.1.
Any long-term use of the device (>50 h) at maximum permissible operating conditions
can result in the deterioration of the measurement accuracy.
Fig. 3.1 Operating conditions

Safety
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: [phone] · www.akytec.de
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4 Safety
Explanation of the symbols and keywords used:
DANGER
DANGER indicates an imminently hazardous situation which, if not avoided, will
result in death or serious injury.
WARNING
WARNING indicates a potentially hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION
CAUTION indicates a potentially hazardous situation which, if not avoided, could
result in minor or moderate injury.
►
NOTICE
NOTICE indicates a potentially harmful situation which, if not avoided, may result
in damage of the product itself or of adjacent objects.

Installation
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: [phone] · www.akytec.de
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5 Installation
To ensure representative measurement of temperature and humidity in the room, choose
carefully the transmitter installation place. PVT10 should not be located at direct sunlight,
near heat sources or air conditioning units, near doors and windows, in places where air
circulation is limited, or on poorly insulated and cold external walls.
Detach the base from the enclosure by pulling gently along the four guiding pins (Fig.
5.1). Fix the base on the wall either by double-sided adhesive tape or by screws. You
may need to drill suitable holes or cutouts in the base for screws and cable.
Fig. 5.1 Device mounting
Orient the transmitter with ventilation slots upwards and downwards to ensure proper air
convection for faster response and higher accuracy. Plug the power cable and connect
the analog outputs or digital interface terminals to the relevant devices (Fig. 5.2). PVT10
uses screwless quick connect spring terminals suitable for wide range of wire cross-
sections 0.2...1.5 mm2. The recommended wire stripping length is 8...9 mm. Push the
spring loaded terminal lever, insert the wire end into terminal hole and release the lever.
Fig. 5.2Wiring
The type of each analog output can be independently changed between 4-20 mA and
0-10 V with jumpers J1 (OUT1) and J2 (OUT2):
closed jumper: 0-10 V
opened jumper: 4-20 mA

Installation
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: [phone] · www.akytec.de
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By default the outputs are assigned:
OUT1: to relative humidity with default scale 0 - 95 % RH
OUT2: to temperature with default scale -20…+70 °C
The output assignments and scales can be changed by Modbus commands.
As the humidity and temperature sensor module is located inside the enclosure and at-
tached to the motherboard, the sensors may be subject to transmitter self-heating effects.
If 4-20 mA or 0-10 V analog outputs are used, powering from 12 V DC voltage is recom-
mended for less self-heating of the instrument and achieving higher accuracy. If only
RS485 interface is used, 24 V DC supply voltage is also appropriate. For wiring of RS485
lines use twisted pair cable, like LiYY TP 2 x 2 x 0.5 mm2or CAT 5. Use one pair for
D+(A) and D-(B) wires and the second pair for common 0V and power +U wires.
After wiring and setting output options attach the enclosure back to the base.

Emergency mode
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: [phone] · www.akytec.de
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6 Emergency mode
The current outputs of the transmitter may be programmed via Modbus commands to
signal if the connection with the sensor is lost. The signal may be set to 3.8 mA or 21.5
mA. See the table of Modbus registers for more information (Appendix B2).

Restore factory settings
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: [phone] · www.akytec.de
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7 Restore factory settings
To reset the device’s Slave ID, baud rate and sbit number to factory settings, proceed as
follows:
Turn off the power supply
Set the jumper on the terminal X6
Turn on the power supply
Turn off the power supply
Remove the jumper on the terminal X6
Turn on the power supply.