DeZem HarvyLR-36 Manual de instrucciones

IoT sensor HarvyLR

User manual and technical data of the

LoRaWAN sensors HarvyLR-36 and HarvyLR-360

Version 2.2

Feb 2023

deZem GmbH

Wilmersdorfer Str. 60, 10627 Berlin

Phone: +49 30 31 800 730

Fax: +49 30 31 800 731

[email protected] · www.dezem.de

User manual IoT sensor HarvyLR

Page 2 of 9

Contents

1Introduction..............................................................................................................................................................3

2Safety instructions....................................................................................................................................................3

3Product description .................................................................................................................................................. 4

3.1 Product designation ......................................................................................................................................... 4

3.2 Intended use ....................................................................................................................................................4

4Functional Description..............................................................................................................................................5

5Installation................................................................................................................................................................6

5.1 First time charging of HarvyLR .........................................................................................................................6

5.2 Connecting the sensor ..................................................................................................................................... 6

6Disposal ....................................................................................................................................................................7

7Technical Data .......................................................................................................................................................... 8

8Support.....................................................................................................................................................................9

User manual IoT sensor HarvyLR

Page 3 of 9

1Introduction

Please read the following information carefully.

Keep the manual or pass it on to other users of the product. Visit our website www.dezem.de with the respective

website belonging to the product. There you may find further information about the product.

This product complies with the legal, national and European requirements. All company names and product designa-

2Safety instructions

The device complies with electrical protection class III.

•To maintain the protection class III, only external sensors/power sources which also comply with SELV

(safety extra-low voltage) requirements –protection class III –may be connected to the device.

•Avoid shocks or impacts.

•If the housing or cable is damaged, please contact deZem GmbH and do not install the affected device.

•Do not connect deZem clamp-on current transformers to uninsulated or damaged cables.

•The product must be installed professionally and in accordance with the specified installation guidelines.

•Installation may only be carried out by appropriately qualified personnel.

•For safety and approval reasons, unauthorised conversion and/or modification of the product is not per-

mitted.

•Maintenance, adjustment or repair work may only be carried out by a specialist or a specialist workshop

that is familiar with the associated dangers and the relevant regulations.

•Do not expose the product to extreme temperatures, direct sunlight or strong vibrations. Protect the prod-

uct from dust and dirt.

User manual IoT sensor HarvyLR

Page 4 of 9

3Product description

3.1 Product designation

Type

HarvyLR-36

HarvyLR-360

Shunt value

1 Ohm (+/- 1 %)

0.091 Ohm (+/- 2 %) - 1 Ohm und

0.1 Ohm in parallel

Max. input

25 mA AC

36 mA DC

250 mA AC

360 mA DC

* when using these transformer types protection class II is valid

In the following, the general short designation "HarvyLR" refers to both product variants.

LoRaWAN® and the LoRAWAN® logo are trademarks and are used under licence from the LoRa Alliance®.

3.2 Intended use

HarvyLR is used for wireless acquisition of AC and DC currents via LoRaWAN and it is self-powered, i.e. it does not

require an external power supply or battery. It is particularly suitable for the acquisition of RMS currents using the

deZem clamp-on current transformers as well as industrial 4–20 mA output signals. The intelligent event filter inte-

grated in the sensor provides metering t series (inrush currents, etc.) accurate to the second at a defined maximum

rate.

Any application other than described above, as well as modifications to the product, are considered improper use

and may impair the protective effect.

User manual IoT sensor HarvyLR

Page 5 of 9

4Functional Description

The HarvyLR records AC and DC currents via LoRaWAN. The intelligent event filter integrated in the sensor provides

metering series (inrush currents, etc.) accurate to the second at a defined maximum rate. Even a signal current (AC

or DC) of only 0.15 mA on average is sufficient to record and send metered values every 10 minutes on average. Even

higher data rates are possible with larger input currents.

Optionally, the HarvyLR can be integrated into the deZem DataSuite, see chapter 5.3. There, its metered value histo-

ries are immediately available online for further purposes.

Metering interval

Isec (avg-long)

Metering interval

<= 30 mA OR Vsys > FastSampleLevel

1 sec.

>= 20 mA

3 sec.

>= 10 mA

5 sec.

>= 5 mA

10 sec.

>= 2 mA

20 sec.

Else

30 sec.

LoRaWAN Payload encoding (Port 1)

Name

Type

Bytes

Description

Example

Value range

Version

uint8[3]

0–2

Firmware version

1, 5, 1 v1.5.1

Shunt Value

uint8

Value of shunt resistance on

hw 1/10 Ohm

10 1 Ohm

1 0.1 Ohm

Amplifier Gain

uint8

Gain, typical 100x

Vsys (current)

uint16

5–6

System voltage or charge of 0.47 F su-

percaps; system voltage in 1/10 mV

29470

29 47 mV

2.947V

<= 3600 mV

Vsys (min)

uint16

7–8

Minimum system voltage since last

LoRaWAN uplink package; system

voltage in 1/10 mV

Vsys (max)

uint16

9–10

Maximum system voltage since last

LoRaWAN uplink package; system

voltage in 1/10 mV

Vamp (rms)

uint16

11–12

Output voltage (RMS value) of ampli-

fier (x100 Gain) in 1/10 mV

35991

3.5991 V

Isec (current)

uint16

13–14

RMS current (calculated from shunt

value and Vamp);

Secondary current CT in 1/100 mA

3101

31.01 mA

12034

120.34 mA

0...36 mA

(1 Ohm)

0...360 mA

(0.1 Ohm)

Isec (avg-long)

uint16

15–16

Moving Average Filter since Power Up

above Isec (current); calcula-

tion (exponent=4): Filtered Value =

(15 * oldValue + newValue) / 16; sec-

ondary current CT in 1/100 mA

“

Isec (avg-

short)

uint16

17–18

Average value filter with Reset at last

LoRaWAN upload

(max. 600 values); secondary current

CT in 1/100 mA

“

User manual IoT sensor HarvyLR

Page 6 of 9

Name

Type

Bytes

Description

Example

Value range

Isec (min)

uint16

19–20

Minimum secondary current since

last LoRaWAN uplink package; sec-

ondary current CT in 1/100 mA

“

Isec (max)

uint16

21–22

Maximum secondary current since

last LoRaWAN uplink package; sec-

ondary current CT in 1/100 mA

“

Meas. Counter

uint16

23–24

Number of measurements since last

LoRaWAN upload

0x000f 15 Meas-

urements since

last

uplink

x (uint32)

Last upload

uint16

25–26

Seconds since last upload/duration of

creating average value; Time in sec-

onds since last uplink

x seconds

Temp

int16

27–28

Temperature in 1/10 °C; nRF52832

temp sensor +-5°C accuracy;

Power Loss?

uin8

1= Power Loss detected

0 = No Power loss detected;

when Isec < 0.75 mA

5Installation

5.1 First time charging of HarvyLR

Prerequisite: HarvyLR is set up on a LoRaWAN server (e.g. deZem IoT platform, i.e. deZem.io).

1. For initial charging, we recommend connecting the HarvyLR to the computer via the optional USB adapter cable.

As soon as values are transmitted from the sensor to the LoRaWAN server, the HarvyLR is sufficiently charged.

The charging time is max. 6 min. when using the USB adapter cable.

2. Disconnect the HarvyLR from the computer and remove the USB adapter cable.

Alternatively, the sensor can also be connected directly without charging beforehand, as described in the next sec-

tion. In this case, approx. 2 mAh are required for charging. Depending on the primary current, it may take a different

amount of time until the HarvyLR transmits values for the first time.

5.2 Connecting the sensor

1. Connect the HarvyLR to the appropriate deZem clamp-on current transformer for an RMS current measurement

or to the adapter cable (for 4–20 mA signals). The sensor housing can be operated freely suspended or fixed

with cable ties.

User manual IoT sensor HarvyLR

Page 7 of 9

HINT

For the 4-20 mA signal there is no need to pay attention to the polarity.

WARNING

NEVER connect a clamp-on current transformer to a conductor unless it is connected to the HarvyLR or

other terminal device. Otherwise, high voltages may build up at the transformer output. It is imperative

that additional insulation is fitted between the conductor and the clamp-on current transformer in order

to comply with the above-mentioned SELV requirements (cf. chapter 2, Safety instructions) of sen-

sors/current sources connected externally to the device.

5.3 Configuration in deZemAd

Type of

current

transf.

Max.

primary current

[in A]

Min.

primary

current

[in A]

Nominal

secondary

current

[in mA]

Current

ratio

Max.

wire-Ø

[in mm]

Max. wire

cross-sect.

[in mm²]

Scale factor

deZemAd

HarvyLR-360

HarvyLR-36

deZem clamp-on current transformers

T80

0,8

2000

5,6

T80/26,6

26,7

3000

5,6

T150/40

150

3750

3,75

T300

300

0,9

250

1200

13,8

150

1,2

T300/40

300

188

1,6

7500

13,8

150

7,5

T500

500

0,8

250

2000

19,5

300

T500/40

500

312

2,8

1250

19,5

300

12,5

4–20 mA analog signals

0,001

6Disposal

In Germany and for products delivered directly from Germany: All devices must be disposed of in

an orderly manner. Due to the applicable regulations, the electrical and electronic devices of

deZem GmbH may not be disposed of via the public collection points for electrical devices. The

complete electronic devices of deZem GmbH must be returned to us for disposal. The prepaid

delivery must be sent to the following address:

deZem GmbH, Wilmersdorfer Str. 60, 10627 Berlin.

In countries of the European Union outside Germany: Information on the correct disposal can be

obtained from your dealer or the responsible sales department.

User manual IoT sensor HarvyLR

Page 8 of 9

7Technical Data

Type

HarvyLR-36

HarvyLR-360

Housing dimensions

HxWxD: 22x69x49 mm

Weight

50 g

Power supply

Self-powered, Input voltage max. 3 V

Input current

0–25 mA AC

0–36 mA DC

0–250 mA AC

0–360 mA DC

Connection

1x JST-socket, suitable for deZem clamp-on current

transformers

IoT protocol

LoRaWAN v1.03, Class A Device, EU863-870 Mhz

Permissible ambient conditions

Temperature: 0–55 °C

Humidity: 30–60 %

Protection type: IP20

Permissible transport conditions

Temperature: -10–55 °C

Humidity: 20–70 %

User manual IoT sensor HarvyLR

Page 9 of 9

HarvyLR Default parameter

Name

Typ

Bytes

ShuntVal

1000

Shunt resistance in [mOhm]

When set to 100, actually 91 is used!

TxMinInterval

900

Min. LoRaWAN upload interval in [s]

LoRaLevel

3100

Min. voltage level for regular LoRaWAN uploads in [mV]

ColdStartEndLevel

2700

Min. voltage level for the end of initial cold start in [mV]. As soon as once

Vsys > ColdStartEndLevel, the sensor starts measuring

ExpFilterExponent

Exponential filter exponent (2^x), Default: 4 -> 16

IsecBrownout

500

Isec value in [μA], that considered a “brownout” and sent via confirma-

ble uplink

FastSampleLevel

3500

System voltage in [mV], when above sample every second

FilterAbs

180

Absolute Vamp difference in [mV], to trigger uplink

FilterRel

Required relative change of Isys in [%] to trigger instant upload. Value

[1..100] e.g. => +/- 15 %

LogUart

false

Set to „true” to print more detailed logs on UART (needs more power).

Even with „false”, some logs are generated

LoRaWAN Frequencies

Direction

Frequency

Bandwidth

Modulation

Duty Cycle

Transmission

power

RX + TX

868.1 MHz

+/- 0.0625 MHz

LoRa

≤ 1%

≤ 14 dBm

RX + TX

868.3 MHz

+/- 0.0625 MHz

LoRa

≤ 1%

≤ 14 dBm

RX + TX

868.3 MHz

+/- 0.0625 MHz

LoRa

≤ 1%

≤ 14 dBm

RX + TX

868.3 MHz

+/- 0.125 MHz

LoRa

≤ 1%

≤ 14 dBm

RX + TX

868.5 MHz

+/- 0.0625 MHz

LoRa

≤ 1%

≤ 14 dBm

RX + TX

867.1 MHz

+/- 0.0625 MHz

LoRa

≤ 1%

≤ 14 dBm

RX + TX

867.5 MHz

+/- 0.0625 MHz

LoRa

≤ 1%

≤ 14 dBm

RX + TX

867.7 MHz

+/- 0.0625 MHz

LoRa

≤ 1%

≤ 14 dBm

RX + TX

867.9 MHz

+/- 0.0625 MHz

LoRa

≤ 1%

≤ 14 dBm

RX: receive mode, TX: transmit mode

8Support

Do you have any further questions about set-up and operation? Our deZem team will be happy to answer them.

Give us a call: +49 30 3180 0730 or write us an email to sup[email protected].

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