Akytec PVT10 Manuale utente

akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel: +49 (0) 511 16 59 672-0 · www.akytec.de

PVT10

Humidity and temperature transmitter

User guide

PVT10_2016.11_0214_EN

Subject to technical changes and misprints

akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel: +49 (0) 511 16 59 672-0 · www.akytec.de

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.: +49 (0) 511 16 59 672-0 · www.akytec.de

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.: +49 (0) 511 16 59 672-0 · www.akytec.de

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.: +49 (0) 511 16 59 672-0 · www.akytec.de

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.: +49 (0) 511 16 59 672-0 · www.akytec.de

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.: +49 (0) 511 16 59 672-0 · www.akytec.de

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.: +49 (0) 511 16 59 672-0 · www.akytec.de

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.: +49 (0) 511 16 59 672-0 · www.akytec.de

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.: +49 (0) 511 16 59 672-0 · www.akytec.de

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.

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