VPInstruments VPLog-i-R User manual

VPLog-i-R
VPINSTRUMENTS.COM
User manual
© 2020 Van Putten Instruments BV
MAN-VP-LOGR-UK-2001 Date: 01-10-2020

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Creati on date: 01-10-2020 i n Del ft
VPLog-i-R
© 2020 Van Putten Instruments BV
Publisher
Van Putten Instruments BV
Buitenwatersloot 335
2614 GS Delft
The Netherlands

3
Table of Contents
1Introduction 4
2Safety Regulations 5
3Instrument Description 6
4Installation 7
5Connection 8
6Configuration 10
7Specifications 10

© 2020 Van Putten Instruments BV | MAN-VP-LOGR-UK | Revision: 2001 | Date: 01-10-2020
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1 Introduction
This document describes the user manual and the functional specifications of the VPLog-i-R current
sensor.
Glossary
AC
Alternating current
CF
Crest Factor = Peek_current/RMS_current
DC
Direct current
GND
Ground
Hz
Hertz
IDEP/CN8
Combined Nomenclature code
mA
milli Ampère
ppm
Parts pro million; 1ppm=0,0001%=1/1000000
PWR
power
true RMS
true Root Mean Square, Urms = sqrt(mean(U²))

© 2020 Van Putten Instruments BV | MAN-VP-LOGR-UK | Revision: 2001 | Date: 01-10-2020
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2 Safety Regulations
Warnings, cautions and notes within this manual will be used as follows:
WARNING: Used to denote a danger to personnel of serious injury and/or death. The warning will be
preceded by the caption WARNING and the detail of any warning will be in bold and uppercase.
CAUTION: Used to denote a possibility of damage to material or equipment but not a danger to
personnel. The caution will be preceded by the caption CAUTION and the detail of any caution will be
in bold and lowercase.
NOTE: used to draw attention to information that is extraneous to the immediate subject of the text.
A note will be preceded by the caption NOTE and the detail will be in italics.
All warnings, cautions and notes will precede the relevant sections of the text.
General safety regulations
WARNING: THIS DEVICE IS NOT DESIGNED FOR AND THEREFORE NOT INTENDED FOR USE
IN ANY ENVIRONMENT WHERE HUMAN LIFE DEPENDS DIRECTLY ON THE USE OF PROVEN
RELIABILITY AND FAILSAFE TECHNIQUES AND COMPONENTS.
WARNING: THIS DEVICE MUST ONLY BE OPERATED IN ENVIRONMENTS
LIMITED TO THE SPECIFIED TEMPERATURE AND HUMIDITY CONDITIONS.
WARNING: THIS DEVICE IS NOT PROTECTED AGAINST ANY CORROSION
FROM ANY TOXICAL VAST PARTICLE, FLUID OR GAS.
WARNING: THIS DEVICE MUST NOT BE USED IN NUCLEAR PLANTS OR IN
ANY EXPLOSIVE ENVIRONMENT.
CAUTION: The maximum input voltages must not be exceeded.

© 2020 Van Putten Instruments BV | MAN-VP-LOGR-UK | Revision: 2001 | Date: 01-10-2020
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3 Instrument Description
The VPLog-i-R AC current sensor, based on a Rogowski coil, that measures AC currents up to
1600A true-rms on a single phase power cable.
The sensor has a modbus interface for communication.
The sensor has an indication LED. This blinks when modbus communication is ongoing.
Each sensor has a unique serial number and is delivered with a calibration certificate and report.
The following figure shows the module dimensions. The area/diameter of the loop formed by the
measurement coil (light gray on the figure) is 65mm?.
The hole (?1.5mm) in the plug can be used to seal the device.
The irregularity in the loop between the top and bottom coil end, is compensated by a unique circuit
that compensates for this error. So there is no additional error due to the mounting of the coil in a
plane perpendicular to the power cable or not.

© 2020 Van Putten Instruments BV | MAN-VP-LOGR-UK | Revision: 2001 | Date: 01-10-2020
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4 Installation
Connection to the cable
To install the VPLog-i-R sensor, wrap the measurement coil around the single phase power cable
(L1, L2, L3 or N). Then click the plug into the clamp. The coil has to make a closed loop around the
power cable.
The following figure illustrates a faulty installation.
NOTE: The sensor is not sensitive to power direction.
NOTE: Wrapping the power cable twice doubles the sensor’s sensitivity. Use this feature to measure
small currents.

© 2020 Van Putten Instruments BV | MAN-VP-LOGR-UK | Revision: 2001 | Date: 01-10-2020
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Sensitivity is 5 times higher if the power cable is wrapped around the coil 5 times
Note: The alignment of the sensor has no influence on the accuracy, due to the compensation circuit
added in the VPLog-i-R.
WARNING: HIGH VOLTAGES ARE HAZARDOUS AND CAUSE AN IMMEDIATE
RISK TO SERIOUS INJURY OR EVEN DEATH.
WARNING: BE VERY CAREFUL TO RESPECT ALL GENERAL
AND LOCAL SAFETY PRECAUTIONS
(E.G DISCONNECT POWER, WEAR SAFETY GLASSES, RUBBER GLOVES
AND ADEQUATE CLOTHES, ETC)
Power-On/Off
The VPLog-i-R sensor has no power on/off switch. Applying power to the sensor starts its internal
power-up sequence. Switch the sensor off by removing its power supply.
5 Connection
Terminals
Terminal
Color
PWR
Red
RS485A
Orange
RS485B
Brown
GND
Black

© 2020 Van Putten Instruments BV | MAN-VP-LOGR-UK | Revision: 2001 | Date: 01-10-2020
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Modbus settings
The following table holds the default communication parameters for modbus.
Parameter
Description
Modbus Address
1
Baudrate
38400 baud
Parity
No parity bit is used.
Stop-bits
1 stop bit is used.
Modbus registers
The following is an overview of the available modbus registers.
Name
Register
Description
Units
I 50Hz
1
Current at base frequency
0.1 AAC
I RMS
2
True RMS current
0.1 AAC
Frequency
3
Frequency
0.01 Hz
Protocol functions
For reading the 16 bit values, modbus supports the commands “Read Holding Registers” (0x03).
When addressing registers, the command contains the address minus 1, for instance registers 1..3
are addressed as 0..2.
The VPLog-i-R also supports the modbus scan protocol. This allows to change the modbus settings
and to request extra information from the module.
Modbus example
Example 1
The following example contains a request and response for 2 registers starting at register 2 (RMS
current + frequency).
Request : 01 03 00 01 00 02 95 CB
Response: 01 03 04 13 88 13 88 73 CB
Data bytes
Description
Request
01
modbus address VPLog-i-R
03
Function
00 01
Starting register
00 02
Register count
95 CB
CRC
Response
01
VPLog-i-R modbus address
03
Function
04
Byte count

© 2020 Van Putten Instruments BV | MAN-VP-LOGR-UK | Revision: 2001 | Date: 01-10-2020
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13 88
I RMS (5000 -> 500.0 AAC)
13 88
I RMS (5000 -> 50.00Hz)
73 CB
CRC
6 Configuration
In order to configure the modbus settings of the VPLog-i-R, connect it to the M12 5 Pin female
connector (VPA.0000.300) and use the VPFlowScope JB5 interface KIT (VPA.5001.205) to connect
it to your PC.
Pin
Wire color
1
Red
2
Black
3
-
4
Orange
5
Brown
M12 5 Pin female connections (internal, back side)
Use the VPLog-i-R configuration software (download at www.vpinstruments.com) to check and
configure baudrate, address, stopbits and parity.
Enter the connected COM port number (JB5 RS458 to USB converter) and follow the instructions.
7 Specifications
Environmental
Specification
Value
Operational ambient temperature
-20 ºC to +70 ºC
Operational relative humidity
max 95%, non-condensing
Storage ambient temperature
-20 ºC to +70 ºC
Storage relative humidity
max 95%, non-condensing
Mechanical
Specification
Value
Coil Length
250 mm
Allowed Power Cable Diameter
65 mm
Coil Diameter
6 mm
Coil Bend Radius
30 mm
Coil Plug Diameter
12 mm
Housing W x H x D
27 mm x 40 mm x 14 mm
Output Cable
5 m UL-LiYY, double insulation
Weight (Housing + Coil)
150gr
IDEP/CN8
8504.3129

© 2020 Van Putten Instruments BV | MAN-VP-LOGR-UK | Revision: 2001 | Date: 01-10-2020
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Electrical
Specification
Unit
Min.
Typ.
Max.
Conditions
Voltage (PWR to GND)
Vdc
7
-
28
Power consumption
mA
11
Vdc=24V
Current range (CF=2)
Aac
1600
Current range (CF=1.5)
Aac
2200
Frequency range
Hz
48
62
Measurement bandwidth
Hz
720
Noise
% full scale
0.2
0.5
Supply coefficient
ppm/V
160
(1)
Temperature coefficient
ppm/°C
100
(2)
Accuracy
% full scale
-1
1
(3)
Modbus start-up time
s
1
2
(4)
Measurement start-up
time
s
2
3
(5)
(1) The change of the output current, if the sensor voltage changes one Volt.
(2) The change of the output current, if the sensor temperature changes one degree Celsius.
(3) When mounted as shown in chapter Installation.
(4) Power-on to modbus ready time
(5) Power-on to correct measurement read out. 0A is returned before.

© 2020 Van Putten Instruments BV | MAN-VP-LOGR-UK | Revision: 2001 | Date: 01-10-2020
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13
Notes
© 2020 Van Putten Instruments BV | MAN-VP-LOGR-UK | Revision: 2001 | Date: 01-10-2020

VPLog-i-R14
Notes
© 2020 Van Putten Instruments BV | MAN-VP-LOGR-UK | Revision: 2001 | Date: 01-10-2020

easy insight into energy flows
MAN-VP-LOGR-UK-2001
Date: 01-10-2020
Buitenwatersloot 335
2614 GS Delft
The Netherlands
[e-mail]
www.vpinstruments.com
VPInstruments