Akytec PVT10 User manual

akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel: +49 (0) 511 16 59 672-0 · www.akytec.de
1
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
2
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
3
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
4
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
5
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
6
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
7
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
8
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
9
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.

Maintenance and cleaning
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: +49 (0) 511 16 59 672-0 · www.akytec.de
10
8 Maintenance and cleaning
The humidity and temperature transmitter PVT10 is maintenance-free. If needed the
housing of the device can be cleaned using a damp cloth and non-aggressive cleaning
solutions, in switched-off state.

Transport and storage
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: +49 (0) 511 16 59 672-0 · www.akytec.de
11
9 Transport and storage
The device packaging must ensure a shockproof transport and storage. The original
packaging offers an optimal protection.
If the device is not taken into service immediately after delivery, it must be carefully stored
in a safe and protected place.
Storage temperature range: -20...+70 °C.
WARNING
Remove all the adherent media rests on the process connection before storing the
device after operation. This is particularly important if the medium is hazardous to
health, e.g. radioactive, carcinogenic, toxic, caustic, etc.
►
NOTICE
The device may have been damaged while shifting.
Check the device for transport damages and completeness!
Report the transport damage immediately to the shipper and akYtec GmbH!

Appendix B Connection to the Computer
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: +49 (0) 511 16 59 672-0 · www.akytec.de
12
Appendix B Connection to the Computer
B.1 Communication parameters
Parameter
Supported values
Default value
Baud rate
1.2…57.6 kbit/s
9.6 kbit/s
Data bits
8
8
Parity
none
none
Stop bits
1, 2
1
Protocol
Modbus RTU
Modbus functions
03 - read multiple registers
06 - write single register
Error codes
01 - illegal function
02 - illegal data address
03 - illegal data value
04 - slave device failure (details of last error 04 can be read from register
0x0008)
B.2 Modbus registers
Registers Reg are shown in hexadecimal 0-based format.
Modbus holding register numbers are shown in decimal 1-based format, and may be addressed either from 00001
or 40001 base.
Address
RW
Description
Supported values (dec)
Default
hex
dec
0x0001
(4)0001
R
Product version
-
PV
0x0002
(4)0002
R
T1
0x0003
(4)0003
R
0
0x0004
(4)0004
RW
Slave ID (net address) *
1...247 **
16
0x0005
(4)0005
RW
Baud rate *
1.2...57.6 kbit/s
9.6
0x0006
(4)0006
RW
Response delay, ms
10...255
10
0x0007
(4)0007
RW
Stop bits *
1, 2
1
0x0008
(4)0008
R
Last error code
1...255
0
0x0010
(4)0016
R
Software version
520 (dec), 208 (hex)
520
0x0011
(4)0017
RW
Restarts counter
write ‘42330’ to restart device
(no response will follow)
-
0x0099
(4)0153
RW
Temperature compensation
parameter
-32000...+32000
0
0x00A2
(4)0162
RW
Zero adjustment for
temperature data, °C × 100
-32000...+32000 (-320.00...+320.00 °C)
0
0x00A3
(4)0163
RW
Slope adjustment for
temperature data, % × 1000
-32000...+32000 (-32.000...+32.000 %)
0

Appendix B Connection to the Computer
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: +49 (0) 511 16 59 672-0 · www.akytec.de
13
Address
RW
Description
Supported values (dec)
Default
hex
dec
0x00A4
(4)0164
RW
Change rate limit for temperature
data, °C × 100 / s
1...32000 (0,01...320.00 °C/s),
0 - no limit
0
0x00A5
(4)0165
RW
Zero adjustment for humidity
data, %RH × 100
-32000...+32000
(-320.00...+320.00 %RH)
0
0x00A6
(4)0166
RW
Slope adjustment for humidity
data, % × 1000
-32000...+32000
(-32.000...+32.000 %)
0
0x00A7
(4)0167
RW
Change rate limit for humidity
data, %RH × 100 / s
1...32000 (0.01...320.00 %RH/s),
0 - no limit
0
0x00A8
(4)0168
RW
Integrating filter time constant for
all channels, s
1...32000 (seconds),
0 - no filter
0
0x00C9
(4)0201
RW
Parameter tied to analog
output 1
0 - none
2
1 - temperature
2 - humidity
3 –dew point
9 - forced Modbus control,
value set in (4)0203
0x00CA
(4)0202
RW
Parameter tied to analog
output 2
0 - none
1
1 - temperature
2 - humidity
3 –dew point
9 - forced Modbus control,
value set in (4)0204
0x00CB
(4)0203
RW
Forced value for analog
output 1***
0...1000 (0.0%...100.0% of output scale)
0
0x00CC
(4)0204
RW
Forced value for analog
output 2***
0...1000 (0.0%...100.0% of output scale)
0
0x00FF
(4)0255
RW
Sensor and analog outputs
status
bit [0] = 0/1 –sensor present / absent
010110
22d
bit [1] = 0/1 - analog outputs deactivated /
activated
bit[2]= 0/1 - in case of sensor absent, turn
signaling off/on analog output1
bit [3] = 0/1 –in case of sensor absent,
turn on signaling with low current/high
current on analog output1;
if bit [2] = 0 –this bit will be ignored
bit[4]=0/1 - in case of sensor absent, turn
signaling off/on analog output2

Appendix B Connection to the Computer
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: +49 (0) 511 16 59 672-0 · www.akytec.de
14
Address
RW
Description
Supported values (dec)
Default
hex
dec
bit[5]=0/1 - in case of sensor absent, turn
on signaling with low current/high current
on analog output2;
if bit[4]==0 this bit will be ignored
bit [6] = 0/1 –current/voltage output
detected on output1, read-only
Bit [7] = 0/1 –current/voltage output de-
tected on output2, read-only
0x0102
(4)0258
R
Measured temperature, °C×100
signed integer, -4000...+12500
(-40.00...+125.00 °C)
-
0x0103
(4)0259
R
Measured humidity, %RH×100
signed integer, 0...+10000
(0.00...100.00 %RH)
-
0x0104
(4)0260
R
Calculated dew point, °C×100
signed integer, -8000...+10000
(-80.00...+100.00 °C)
-
0x0105
(4)0261
RW
0% value for analog
output 1
signed integer, -1000...+1000
(-1000...+1000 °C/%RH)
0
0x0106
(4)0262
RW
100% value for analog
output 1
signed integer, -1000...+1000
(-1000...+1000 °C/%RH)
95
0x0107
(4)0263
RW
0% value for analog
output 2
signed integer, -1000...+1000
(-1000...+1000 °C/%RH)
-20
(65516)
0x0108
(4)0264
RW
100% value for analog
output 2
signed integer, -1000...+1000
(-1000...+1000 °C/%RH)
70
* The new value is applied after restart.
** Broadcast slave ID 0 can be used to assign a new ID to device with unknown ID. When addressing by ID 0 the
device shall be the only Modbus instrument in the network. The device will not respond to Master command when
addressed by ID 0.
*** This value is dynamic and not kept in EEPROM after restart.
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