Contrel EMA90 User Manual

EMA90

ELECTRICAL MULTIFUNCTION ANALYZER

User Manual

IM 125-U v. 4.4

EMA90 IM125-U v4.4.doc

ELECTRICAL

MULTIFUNCTION ANALYZER RECORDER

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Information in thi s doc ument is subjec t to cha nge without n otic e and do es not rep resent a comm itm ent on the p art of
Contrel Elettronica Srl.

This document ation is consigned to th e customer to enable the c orrect and safe opera tion of the instrument; a ny
other use of documentation is strictly prohibited.

The information contained herein is the property of Contrel Elettronica Srl, and by law, no part of it may be
reproduced, t ranscribed, s tored in a ny retriev al system, or translated i nto an y language b y means (eve n for internal
purposes by the customer) without the express written permission of Contrel Elettronica Srl.

In addition, no part of this manual may be transmitted in any form by any means, including photocopying and
recording, for any purposes, without the express written permission of Contrel Elettronica Srl.

In case of Copyright violation the customer is directly responsible.

TERMS OF WARRANTY
The warranty is valid for the period of twelve months after material receipt.

The warranty covers free repair or replacement of equipment parts, which are recognized as faulty due to
manufacturing defects.
Warranty does not cov er those pa rts which resul ts defectiv e due to misu se or im proper use, incor rect instal lation or
maintenance, opera tion by unau thori ze d perso nnel, dam age duri ng tra nsport ation, or which in any case do n ot sho w
manufacturing defects of the equipment.
Not included in the warranty terms are technical interventions regarding equipment installation to electrical systems.
The manufactu rer d eclin es a ny res pon sibili ty for event ual i njur y or d amag e to perso ns, ani mals or thi ngs as res ult of
failure to follow the instructions in the user manual or caused by improper use of equipment.
The expense s of tra nsport as well as the relative risks of same both t o and f rom th e place of rep air, will be the sole
responsibility of the user.
This warrant y expires afte r the date of purchase an d any assis tance require d after said date includi ng spare parts ,
labour, transport of personnel and material will be charged to the user following the tariffs in force for Technical
Assistance Service at the time of such requested service.
In any case the replacement of the equipment as well as the extension of warranty after such breakdown is excluded.

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INDEX

1) MAIN INFORMATION _________________________________________________________5

1.1) INTRODUCTION _________________________________________________________5

1.2) DESCRIPTION __________________________________________________________5

1.3) CE CONFORMITY AND STANDARDS _______________________________________5

2) TECHNICAL FEATURES ______________________________________________________6

2.1) GENERAL SPECIFICATIONS ______________________________________________6

2.2) MEASURING METHOD AND ACCUR ACY ____________________________________8

2.3) MEASURED VARIABLES _________________________________________________9

2.4) CALCULATED VARIABLES _______________________________________________9

2.5) MEASURING & CALCULATION FORMUL AS ________________________________10

3) INSTRUMENT DESCRIPTIO N _________________________________________________12

4) INSTALLATION_____________________________________________________________13

4.1) SAFETY ______________________________________________________________13

4.2) OPERATOR SAFETY ____________________________________________________13

4.3) MOUNTING ____________________________________________________________14

5) INTERNAL B ATTERY ________________________________________________________15

5.1) REPLACEMENT INTERN AL BATTERY _____________________________________15

6) CONNECTION ______________________________________________________________16

6.1) POWER SUPPLY _______________________________________________________16

6.2) VOLTAGE INPUTS ______________________________________________________17

6.3) CURRENT INPUTS ______________________________________________________17

6.4) WIRING DIAGRAM ______________________________________________________17

7) OPTION BOARDS___________________________________________________________19

8) INPUTS / OUTPUTS _________________________________________________________20

8.1) DIGITAL INPUTS _______________________________________________________20

8.1.1) STANDARD DIGITAL INPUTS ___________________________________________20

8.1.2) OPTION DIGITAL INPUTS 4DI ___________________________________________21

8.2) DIGITAL OUTPUTS _____________________________________________________22

8.2.1) STANDARD DIGITAL OUTPUTS _________________________________________22

8.2.2) OPTION DIGITAL OUTPUTS 2DO ________________________________________23

8.2.3) OPTION DIGITAL OUTPUTS 2DO/R _______________________________________23

8.3) OPTION ANALOG OUTPUT 1AO / 2AO _____________________________________24

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8.4)

SERIAL PORTS ________________________________________________________26

8.4.1) STANDARD SERIAL PORT ______________________________________________26

8.4.2) RS485 CONNECTION NOT SHIELDED ____________________________________27

8.4.3) RS485 CONNECTION SHIELDED _________________________________________27

8.4.4) RS232 CONNECTION __________________________________________________28

8.4.5) MODEM CONNECTION _________________________________________________29

8.4.6) OPTION RS485 PORT (S485) ____________________________________________30

8.5) OPTION PROFIBUS PORT (PF/S) __________________________________________31

8.6) OPTION ETHERNET PORT (ETH or ETH/S)__________________________________32

9) USE ______________________________________________________________________33

9.1) FUNCTION KEYS _______________________________________________________33

10) REAL TIME VALUES ________________________________________________________33

10.1) VISUALIZATION TREE __________________________________________________34

10.2) MEASURES VISUALIZATION _____________________________________________35

10.3) STAT US AND INF ORMAT ION PAGES ______________________________________43

11) SETUP ____________________________________________________________________45

11.1) SET U P ITEM ___________________________________________________________45

11.2) MAIN MENU SETUP _____________________________________________________46

11.3) GENERAL _____________________________________________________________47

11.4) SERIAL COMM _________________________________________________________48

11.5) AVERAGE _____________________________________________________________48

11.6) ENERGY ______________________________________________________________49

11.7) LOAD CONTROL (OPTION) ______________________________________________51

11.8) STORAGE _____________________________________________________________53

11.9) DIGITAL OUTPUT ______________________________________________________55

11.10) DIGI T AL INPUT ________________________________________________________56

11.11) ANALOG OUTPUT (OPTION) _____________________________________________58

11.12) RESET ________________________________________________________________59

11.13) EXIT SETUP ___________________________________________________________59

12) LIST OF MEASURES ________________________________________________________59

13) PROBLEMS AND SOLUTIONS ________________________________________________61

14) EMA SERIAL COMMUNIC ATION PROTOCOL ____________________________________62

15) Notes _____________________________________________________________________63

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1) MAIN INFORMATION

1.1) INTRODUCTION

EMA90 was engineered and tested in compliance with IEC 348 class 1 standards for operating
voltages up to 600 Vac rms, considering the VDE 0110 group C isolation standards for operating
voltages up to 500 Vac rms.

The present manual contains all of the information warnings that must be followed up by the operator
to ensure a right use of the equipment and to maintain the safe operating conditions.

1.2) DESCRIPTION

The EMA90 is an instrument which has been designed to monitor, store and analyze all electrical
variable in a distribution line.
All the relevant data are displ ayed and, if desired, stored on internal RAM and transm itt ed to a remot e
PC, via RS485 (standard) on which the compatible management software has been installed.
It is possible to monitor via digi tal outputs (2 dig. out. Standard + 2 dig. out options) alarms, sirens or
strategically factory loads.
EMA90 with optional harmonic analyzes can c arry out network harmonic content analyzes with FFT
method up to the 31

st

harmonic, very useful to locate network disturbances.

The EMA can perform accurate deep and complete energy analyzes.
A fundamental feature of EMA90 is the easy way to integrate new additional options and the

upgrading of the firmware using serial port and flash technology.
All parameters are displayed on a graphic LCD display light-back with a resolution of 128x128 dots.
Displaying and programming mode are carried out by means of a 5 buttons keyboard.

1.3) CE CONFORMITY AND STANDARDS

The instrument was tested in compliance with EMC 89/336/EEC and complies with the following
standards:

EMISSIONS = EN 50081-2, 1992 - EN 55022-CLASS B CISPR 22
IMMUNITY = EN 50082-1, 1992 - EN 61000-6-2
SAFETY = EN 61010-2

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2) TECHNICAL FEATURES

2.1) GENERAL SPECIFICATIONS
Power supply/Auxiliary voltage

85-265 V 50/60 Hz/dc.
20-60 V 50/60 Hz/dc (option).

Isolation voltage

3700 Vac rms x 1 minute.

Voltage input

3 inputs, range 10-600Vrms between phase-phase.
Over voltage up to 750 Vac permanent, beyond this value it is imperative to use voltage transformers.
Over voltage category: III (fixed install ation)
Pollution degree: 2 (normally not conductive; temporary conductive for condensation)
Resistor input: >2 MΩ.
Burden 0.2 VA.

Current input

Model EMA90

Model EMA90-1A

3 isolated inputs (internal CT) range

10mA-5A rms

4mA-1A rms

Over current max

10A (100A for 1 second)

2A (10A for 1 second)

Burden 0.2 VA 0.04 VA

Consumption

4VA typical.
6VA max, full optional.

Serial port

Standard: N°1 serial port available as RS485 and RS232 (half duplex isolated, signals Tx/Rx, Gnd).
Option: S485: N°1 RS485 in addition to the standard port (the option has an output 0 - 5V

galvanic insulation).
PF/S: N°1 PROFIBUS port in addition to the standard port
ETH: N°1 ETHERNET port in addition to the standard port
ETH/S: N°1 ETHERNET port and N°1 RS485 port in addition to the standard port
Baud rate serial port: from 1200 to 38400 bps.
Baud rate profibus port: automatically detected among those supported: 9.6 Kbit/s - 19.2 Kbit/s -

5.45 Kbit/s - 93.75 Kbit/s - 187.5 Kbit/s - 500 Kbit/s - 1.5 Mbit/s - 3 Mbit/s

Communication protocol: ASCII and MODBUS-RTU standard, PROFIB US DP-V0 and MODBUS TCP

options.

Input signals

Standard: N°2 passive opt isolated inputs (1000 V), 12 - 24 Vcc.
Option: 4DI: N°4 passive opt isolated inputs (1000 V), 12 - 24 Vcc (total 6 inputs).
The maximum frequency detected by all the inputs is 45 Hz (minimum pulse duration 22ms, duty cycle
50%).

Output signals

Standard: N°2 digital outputs 12-230 Vca-cc / 150mA max. The typical resistance with closed

contacts is 8Ω (R

ONmax

= 12Ω). Maximum frequency pulse emission: 16Hz.

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Options: 2DO N°2 digital outputs 12-230 Vac-dc / 150mA max. The typical resistance with

closed contacts is 8Ω (R

ONmax

= 12Ω). Maximum frequency pulse emission: 16Hz.

2DO/R N°2 relay outputs

The relay specifications are the following:

- Ma ximum power: 62,5 VA, 30 W

- Ma ximum voltage: 250 VAC, 220 VDC

- Ma ximum current: 2 A

The typical currents are:

- 0.5A @ 125 Vac

- 2 A @ 30 Vdc

- 0. 3 A @ 110Vdc

1AO N°1 analog output 0-20 o 4-20 mA with galvanic insulation.
2AO N°2 analog outputs 0-20 o 4-20 mA with galvanic insulation.

Memory data retention

RAM: 128 KB (useful 50KB); 1 Mbytes (all useful) option.
No volatile memory data using internal battery
Data retention: 5 years (typical) at +25°C (77°F).
Stored variables: Average power, Min/max values, Harmonics (option), Samples, energi es and generic
counters.

Display interface

128x128 dot graphic LCD at high contrast (adjustable) and with LED backlit. Dimension 50x50mm.

Keyboard interface

5 functional keys for paging and programming.

Operating temperature

From -10°C (14°F) to +50°C (122°F).

Storage temperature

From -15°C (5°F) to +70°C (158°F).

Operating humidity

90% not condensing.

Protection standards

IP 52 front (EN60529) - IP65 with gasket (on request) - IP 20 screw and terminals.

Weight and dimension

0,430 kg app. (equipped with 2 digital outputs, 2 digital inputs, RS485 and RS232, Memory
128Kbytes), 96x96x130 mm.

96 mm

106 mm

96 mm

15

96 mm

9

EMA 90

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2.2) MEASURING METHOD AND ACCURACY
Measuring range

30-500Hz.

Measuring method

64 sampling per period for V1 and I1, V2 and I2, V3 and I3.
Measuring interval 0,1 second.

Instrument accuracy

Model EMA90

Model EMA90-05

Voltage

< 0.5 %

< 0.25 %

Current

< 0.5 %

< 0.25 %

Power < 1 % < 0.5 %

Energy

< 1 %

< 0.5 %

Power Factor

< 1 %

< 0.5 %

Standard

EN 62053-21

EN62053-22

Sampling frequency

45 Hz=2.280 or at 60 Hz = 3,88kHz

Zero self-regulation
Offset

0,1 second.

RTC - REAL TIME CLOCK

Accuracy: 5 PPM, standard CEI-EN 61038

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2.3) MEASURED VARIABLES

PHASE VOLTAGE (Rms) V

L1-N

- V

L2-N

- V

L3-N

LINE CURRENT (Rms) I

L1

- IL2 - IL3

FREQUENCY F

L1

(Hz)

TEMPERATURE T(°C)

2.4) CALCULATED VARIABLES

LINE VOLTAGE (Rms) V

L1-L2

- V

L2-L3

- V

L3-L1

THREE-PHASE SYSTEM VOLTAGE (Rms) V
THREE-PHASE SYSTEM CURRENT (Rms) I

AVERAGE THREE-PHAS E SYSTEM CUR R EN T I

avg

MAXIMUM AVERAGE THREE-PHASE SY STEM CURRENT I

maxavg

AVERAGE LINE CURRENT I

L1avg-IL2avg-IL3avg

MAXIMUM AVERAGE LINE CURRENT I

L1maxavg

- I

L2maxavg

- I

L3maxavg

NEUTRAL CURRENT I

N

AVERAGE NEUTRAL CURRENT I

Navg

MAXIMUM AVERAGE NEUTRAL CURRENT I

Nmaxavg

POWER FACTOR PF

L1

- PFL2 - PFL3

THREE-PHASE SYSTEM POWER FACTOR PF
COSϕ COSϕ

L1

, COSϕ L2, COSϕ L3

THREE-PHASE SYSTEM COSϕ COSϕ
APPARENT POWER S

L1

- S

L2

- S

L3

(VA)
THREE-PHASE SYSTEM APPAREN T POWER S (VA)
ACTIVE POWER P

L1

- P

L2

- P

L3

(W)
THREE-PHASE SYSTEM ACTIVE POWER P (W)
REACTIVE POWER Q

L1

- Q

L2

- Q

L3

(VAr)
THREE-PHASE SYSTEM RE ACTIVE POWER Q (VAr)
AVERAGE ACT I VE POWER P

AVG

(W)

AVERAGE REAC TIVE PO WER Q

AVG

(VAr)

EXPECTED AC TIVE POWER P

EXP

(W)

THREE-PHASE SYSTEM ACTIVE ENERGY Wh+
THREE-PHASE SYSTEM TRANSFERRED ACTIVE ENERG Y Wh­THREE-PHASE SYSTEM IND U CTIVE REACTIVE ENERG Y VArh+
THREE-PHASE SYSTEM CAPACITIVE REACTIVE ENERGY VArh­Total counters and time bands are available.

TOTAL HARMONIC DISTORTION - THD (%) CURRENT AND VOLTAGE
HARMONIC ANALYZES (Opti on )
Analyzes up to the 31

st

harmonic of both voltage and current for each phase.

V

L1-N

, V

L2-N

, V

L3-N

; IL1, IL2, IL3 (%)

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2.5) MEASURING & CALCULATION FORMULAS

( )

dt

W

L

i

Wh

L

i

A

L

i

W

L

i

PF

L

i

Q

L

i

W

L

i

W

L

i

L

i

I

L

iN

V

L

iN

A

L

i

P

i

L

i

Δk

v

L

iN

k

Q

L

i

P

i

L

i

k

v

L

iN

k

W

L

i

P

i

L

iN

k

I

L

i

P

v

L

iN

k

V

L

iN

P

k

P

k

P

k

P

k

∫

∞

=

=

+

=

⋅=

∑

−

⋅

=

∑

⋅

=

=

=

=

=

=

=

∑

∑

0

Energy Active

FactorPower

2

2

cosCos

PowerAppearent

Power Reactive

Power Active

2

RMSCurrent Line

2

RMS Voltage Phase

1

1

1

1

ϕϕ

EMA90 - USER MANUAL

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Harmonic analyzes:
Cooley Tukey algorithm.

dt

Qh

Φ

Qh

Φ

dt

Wh

Φ

Wh

Φ

A

L

A

L

A

L

A

Φ

Q

L

Q

L

Q

L

Q

Φ

W

L

W

L

W

L

W

Φ

I

I

L

I

L

L

I

Φ

V

V

L

V

L

L

V

Φ

P

v

L

ij

k

V

L

ij

dt

Q

L

i

Qh

L

i

P

k

∫

∞

=

∫

∞

=

++=

++=

++=

+

+

=

+

+

=

=

∫

∞

=

∑

=

0

33

Energy Reactive

0

33

Energy Active

321

3

rentPhaseAppea-3

321

3

Power Reactive Phase-3

321

3

Power Active Phase-3

3

32

1

3

Current System Phase-3

3

3223

12

3

Voltage Line Phase-3

2

Voltage Line

0

Energy Reactive

1

64N 1-Nk0

N

πnk2

1N
0n

sinh(n)j

1N

0n

N

πnk2

cosh(n) H(k)

=≤≤











∑

−

=

−

∑

−

=











=

for

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3) INSTRUMENT DESCRIPTION

The front panel of the EMA90 is described on the following section:

1 DIS PLAY

Back lighted graphic LCD 50x50mm, 128x128 dot, dot pitch 0.35mm x 0.35mm, dot size

0.32mmx0.32mm, high viewing direction 60°, positive and negative vis ual i zation at low reflection.

2 TASTIERA

In the “Acquisition Mode” the "up" and "down" arrows allows to skip through the measuring page of the
instrument while in the “Setup Mode” all the buttons including "Enter" key allows to program the
instrument.

1

2

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4) INSTALLATION

4.1) SAFETY

On receipt of the instrument and prior to installation, make sure it is intact and has not been damaged during
shipment.
Before installing, make sure the operating voltage and mains voltage are compatible.
The instrument po wer sup ply must not be earthed.
The instrument is equipped with a fuse on the power supply type: 5x20mm 315mA 250V Fast (es. Schurter FSF).

• Always disconnect the instrument from all power sources before opening it for maintenance and/or repairs.

• The instrument's capacitor may still be charged even after it has been disconnected from all power sources.

• Maintenance and/or repairs must only be carried out by qualified and authorized personnel.

• If in any dou bt about the instrument's safety take it out of service and implement the necess ary procedures to

prevent its inadvertent use.

• Instrument operation is no longer safe:

A) when the instrument shows clear signs of damage.
B) when the instrument does not work.
C) after long storage in extreme conditions.
D) after serio us dam a ge du ring shipment.

4.2) OPERATOR SAFETY

Carefully read the following pages before installing and using the purchased instrument.
Maintenance and/or repairs must only be carried out by qualified and authorized personnel.
To ensure prope r and safe use of the i nstrument and its cor rect maintenanc e and/or repairs, auth orized personnel

must follow normal safety procedures at all times.

SYMBOLS

READ CAREFULLY THE CONTAINED INSTRUCTIONS

!

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4.3) MOUNTING

The unit needs to be installed on front panel of mains control/s witchboards, wiring and connections
must be carried out following the EMC (Electro-Magnetic-Compatibility) procedures .
Plug in screw terminal blocks are used for appropriate wiring. There is a security locking on the current
inputs terminal block.

Suggested is to install the equipment on vibration free switchboards and with an environmental
temperature ranging between -10 °C and +50°C.

The panel cut-out of the unit is the following:

Following the picture below mentioned, ins ert the instrument from the f ront side of the switchboard;
from behind insert black s upport guide on the screw of the instrument , once the black support guide
fits on the screw and is pushed against t he instrument and the internal panel , screw the nut unti l the
instrument is fixed on the panel.

There are n.2 support guides to mount on opposite side of instrument.

92mm

R3

92mm

96 mm

96 mm

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5) INTERNAL BATTERY

To avoid to lose the setup and all storing data, the instrument is equipped of an internal battery
(CR2450).

5.1) REPLACEMENT INTERNAL BATTERY

Only a qualified and authorized technical person can change the internal battery.
This operation will delete all s toring data and it will restore the def ault setup with the e xception of the

password and the code to enable the harm onics and time bands. Using the software NRG (or relative
serial commands) it’s possible to download all storing data to avoid to losing same.
The next figure shows where is located the battery inside the instrument.

Instruction to change the internal battery:

1) It’s necessary to cut off the power supply of instrument and to disconnect all inputs and all outputs.

2) Using a screwdriver remove the rear and the frame (to unscrew the 4 screws and to act on 4

retention hook).

3) It’s necessary to pay att ention to presence of residual voltage inside the instrument. Don’t touc h

any other component different from the battery circuit.

4) To extract the instrument from the case rear.

5) It’s necessary to extract t he circuit with the battery. Disconnect the 4 way pin strip. To make this

it’s n ecessary to move the batt ery circuit away from the circuit with 12 pole terminal board; it’s not
necessary to force too much. Finally extract the 3 way pin strip.

6) Change the battery. Put the positive pole in the high direction.

7) Proceed at the contrary of the disconnect ed operation to reinstate the battery circuit: insert the 3

way pin strip and after like described at the point 5) reinstate the 4 way pin strip.

8) The 4 pin strip must meet with their relative support.

9) Insert the instrument in the case

10) Replac e the frame. Screw the 4 screws. Cl os e the rear. Restore all t he connection and turn on the

instrument.

11) In the Warnings page is possible to check the condition of battery (BATTERY OK).

4 WAY PIN STRIP

3 WAY PIN STRIP

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6) CONNECTION

6.1) POWER SUPPLY

The instrument doesn’t work without power supply.

Before powering the instrument verify always to insert the right value (85-265 Vac/dc
standard; 20-60 Vac/dc OPTION).

The instrument is equipped with an internal protection fuse on the power supply, type 5x20mm
dimensions, 315mA 250V, Fast (i.e. Schurter FSF). If the instrument is off, with presence of po wer
supply, it’s necessary to verify the internal fuse.
In case of fuse replacement, disconnect the instrum ent from the power supply, current plus voltage
input and all input/out put sections (digital input/output, analog output, RS485/RS 232 serial port etc.),
then using a screwdriver remove the rear and change the fuse that is near the power supply connector
(in the low part of ins trument). Only a qualifi ed and authorized t echnical person c an change the fuse.
Extract the interrupted fuse using a screwdriver and with a plier insert the new fuse.
The instrument's power supply does not require any earth connection.

!

VL1

VL2

VL3

N

S2S2 S1S1 S1 S2

I3

I2

I1

Do1-

A

B

Di2-

Di2+

Di1-

Di1+

gnd

Rx

Tx

Do1+

Do2­Do2+

Do3­Do3+
Do4­Do4+

Di6

C.i

Di5
Di4
Di3

Ao1­Ao1+

A 2
B 2

0V

+5V

Ao1-

Ao2+

Ao2-

Ao1+

AUX

1 2

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6.2) VOLTAGE INPUTS

EMA90 can measure voltages up to a maximum 600 Vrms between phase-phase, further
that value it is imperative to use voltage transformer. When using voltage transformer, make
sure to respect the input and output polarities.

Use cables with maximum c ross-section of 2.5mm

2

at tach them to the voltage measurement screw
terminals.
Connect the instrument following up the wiring diagrams described on chapter 6.4).

EMA90 was developed and tested in accordance with IEC 348 class 1 standards for operating
voltages up to 600 Vac rm s.

6.3) CURRENT INPUTS

Connect the instrument following up the wiring diagrams described on chapter 6.4).

WARNING: before connecting the current inputs to the terminals of the instrument are
advised that the maximum allowable current input must be and not exceed 5A.

WARNING: to prevent accidentally disc onnection of the current input, EMA90 is equi pped
with screw able current input, in order to avoid negligence, operator must first shutdown the
system and short circuit the secondary wiring of the current transformer, if used, and
unscrews the current input terminals.

6.4) WIRING DIAGRAM

!

!

!

L1

L2

L3

N

LOAD

P1 P2

S1 S2

L1

L2

L3

+

+

+

-

-

-

L1
L2
L3

L1
L2
L3

N

LOAD

P1 P2

S1 S2

L1

L2

L3

+

+

+

-

-

-

L1
L2
L3

3 wires insertion, 2 current transformers (Aron)

3 wires insertion, 2 current transformers and 2 voltage transformers (Aron)

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A

NALYZER RECORDER

S

ELECT

P. UPE

NTER

P. D

OWNSELECT

EMA90 - USER MANUAL

-18-

EMA 90

Contrel

ELECTRICAL MULTIFUNCTION ANALYZER RECORDER

S

ELECT P.

UP ENTER

P. DOWN

SELECT

EMA 90

Contrel

ELECTRICAL

MULTIFUNCTION A

NALYZER RECORDER

SELECT P. UP ENT ER

P. DOWNSEL ECT

4 wires insertion, 3 current transformers and 3 voltage transformes

4 wires insertion, 3 current transformers

LOAD

L1
L2
L3

N

P1 P2

S1 S2

L1

L2

L3

+

+

+

-

-

-

N

L1
L2
L3

LOAD

L1
L2
L3

N

P1 P2

S1 S2

L1

L2

L3

+

+

+

-

-

-

N

L1
L2
L3

EMA 90

Contrel

E

LECTRICAL MULTIFUNCTION ANALYZER RECORDER

S

ELEC T

P. UPE

NTER

P. D

OWN

S

ELEC T

Single fase insertion, 1 current transformer

4 wires insertion, 3 current trnsformers and 2 voltage transformers

L1
L2
L3

N

LOAD

P1 P2

S1 S2

L1

L2

L3

+

+

+

-

-

-

N

L1
L2
L3

L1
L2
L3

N

+

LOAD

N

P1 P2

S1 S2

L1

L2

L3

+

+

-

-

-

L1

EMA90 - USER MANUAL

-19-

7) OPTION BOARDS

The options listed below can be mounted alternately with each other (never simultaneously):

- 4DI 4 Digital Inputs

- 2DO 2 Digit al Outputs

- 2DO/R 2 Relays Outputs

- S485 1 RS485 Port

- 1AO 1 Analog Output

- 2AO 2 Anal og Outputs

- ETH 1 E thernet Port

- ETH/S 1 E thernet Port + 1 RS485 Port

- PF/S 1 Profibus Port

Then there is an option that can always be mounted, regardl ess of the configurati on of the instrum ent:

- MEM1 1 MB RAM
Only during the assembly of instrument it’s possible to mount the option board.

EMA90 - USER MANUAL

-20-

8) INPUTS / OUTPUTS

8.1) DIGITAL INPUTS

The EMA90 has 2 opt isolated digital inputs. With the 4DI option it’s possible to have additional 4
inputs. For the digital inputs setup please consult the chapter 11.10).

8.1.1) STANDARD DIGITAL INPUTS

If long distances must be c overed, the wires connected to t he EMA90 needs to be wired in a separat e
channel from the power supply cables, if an i ntersection occurs between the power supply cabl e and
the analog wires, please remember to cross the intersection at 90 degrees, in order to cut the
generated magnetic fields.

Di1+

Di1-

Di2+

Di2-

A

B

N

L N

S1 S2 S1 S2 S1 S2

I1 I2 I3

L1V

L2V

L3V

Di1+

Di1-

Di2+

Di2-

A

Vaux

Do2­Do2+

B

CE

+12 ÷ 24 Vdc

+12 ÷ 24 Vdc

Do1+

Do1-

Do1-

Do1+

gnd

Rx

Tx

gndRxTx

EMA90 - USER MANUAL

-21-

8.1.2) OPTION DIGITAL INPUTS 4DI

This option has 4 digital inputs. With this option the instrument will be equipped with 6 digital inputs
and 2 digital outputs.

2

3

4

5

68

9

10

11

12

7

1

Di1+

Di1-

Di2+

Di2-

A

B

N

L N

S1 S2 S1 S2 S1 S2

I1 I2 I3

L1V

2

345

68

910

1112

7

1

L2V

L3V

Di1+

Di1-

Di2+

Di2-

A

Vaux

Do2­Do2+

B

CE

Do2-

Do2+
C.i
Di6
Di5
Di4

Di3

Di5

Di6

C.i

Di3

12 ÷ 24 Vdc

Do1-

Do1+

Do1-

Do1+

gndRxTx

Tx

Rx

gnd

2

3

4

5

68

9

10

11

12

7

1

Di1+

Di1-

Di2+

Di2-

A

B

N

L N

S1 S2 S1 S2 S1 S2

I1 I2 I3

L1V

2

345

68

910

1112

7

1

L2V

L3V

Di1+

Di1-

Di2+

Di2-

A

Vaux

Do2­Do2+

B

CE

Do2-

Do2+
C.i
Di6
Di5
Di4

Di3

Di5

Di3

Di3

C.i

Di6

12 ÷ 24 Vdc

+12 ÷ 24 Vdc

+12 ÷ 24 Vdc

Do1+

Do1-

Do1-

Do1+

Tx

Rx

gnd

TxRxgnd

EMA90 - USER MANUAL

-22-

8.2) DIGITAL OUTPUTS

The EMA90 has 2 digital outputs. At the standard configuration it’s possible to add 2 others digital
outputs with the 2DO option or the 2DO/R option for the relay outputs.
Each outputs can be programmed as min/max threshold, external band, always ON, pulse emission,
remote control and load control.

8.2.1) STANDARD DIGITAL OUTPUTS

The signs + and - on outputs in the picture have electric meaningless.

If long distances must be c overed, the wires connected to t he EMA90 needs to be wired in a separat e
channel from the power supply cables, if an i ntersection occurs between the power supply cabl e and
the analog wires, please remember to cross the intersection at 90 degrees, in order to cut the
generated magnetic fields.

N

S1 S2 S1 S2 S1 S2

L1 L2 L3

L1V

L2V

L3V

Di1+

Di1-

Di2+

Di2-

Do1+

1Do -

A

B

Do2­Do2+

L N

Vaux

Do1+

1Do -

Do2­Do2+

TxRxgnd

Di1+

Di1-

Di2+

Di2-

A

B

Tx

Rx

gnd

EMA90 - USER MANUAL

-23-

8.2.2) OPTION DIGITAL OUTPUTS 2DO

This option has 2 digital out puts (PHOTOMOS). With this option the instrument will be equipped with 2
digital inputs and 4 digital outputs.

8.2.3) OPTION DIGITAL OUTPUTS 2DO/R

This option has 2 relay out puts. With this option the instrument will be equipped with 2 digital inputs
and 4 digital outputs (2 photomos outputs + 2 relay outputs).

Rx

Tx

N

S1 S2 S1 S2 S1 S2

L1 L2 L3

L1V

L2V

L3V

Di1+

Di1-

Di2+

Di2-

Do1+

1Do -

A

B

Do2­Do2+

L N

Vaux

Do2­Do2+

Do4­Do4+

Do3­Do3+

Do4­Do4+

Do3­Do3+

Do1-

Do1+

gnd

Rx

Tx

Di1+

Di1-

Di2+

Di2-AB

gnd

EMA90 - USER MANUAL

-24-

8.3) OPTION ANALOG OUTPUT 1AO / 2AO

Two options are available: one analog output (1AO) or two analog outputs (2AO).
The analog outputs are optional and they can be programmed as showed in the chapt er 11.11) (0­20mA or 4-20mA). In this configuration the instrument will be equi pped with 2 digital inputs, 2 digital
outputs and 1 (or 2) analog outputs.
Outputs are at galvanic insul ation with maximum load im pedance of 500Ω. The connection to other
peripherals as recorders, ammeters, remote indicators etc., must be carried out using a maximum
cable size of 2.5mm

2

.

If long distances must be c overed, the wires connected to t he EMA90 needs to be w ired in a s eparate
channel from the power supply cables, if an i ntersection occurs between the power supply cabl e and
the analog wires, please remember to cross the intersection at 90 degrees, in order to cut the
generated magnetic fields.

Tx

Max
500Ω

4÷20mA

0÷20mA

N

L N

S1 S2 S1 S2 S1 S2

I1 I2 I3

L1V

2345689101112 7

1

L2V

L3V

Di1+

Di1-

Di2+

Di2-

A

Vaux

Do2­Do2+

B

CE

Ao1­Ao1+

Do1-

Do1+

Ao1-

Ao1+

Do2-

Do2+

Rx

gnd

Tx

Max
500Ω

4÷20mA

0÷20mA

N

L N

S1 S2 S1 S2 S1 S2

I1 I2 I3

L1V

2345689101112 7

1

L2V

L3V

Di1+

Di1-

Di2+

Di2-

A

Vaux

Do2­Do2+

B

CE

Ao1-

Ao1+

Do1-

Do1+

Ao1-

Ao1+

Max
500Ω

4÷20mA

0÷20mA

Ao2-

Ao2+

Ao2­Ao2+

Rx

gnd

Do2-

Do2+

EMA90 - USER MANUAL

-25-

The EMA90 gives a current signal (range 4÷20mA or 0÷ 20mA) proportional at the measures of the
selected param eter. The output is bi-directi onal: the c urrent c an be direct ly or inversely proport ional t o
reference value programmed. Bi-directional means reversal of reference value and not inversion of
current.
Examples:

EMA90 - USER MANUAL

-26-

8.4) SERIAL PORTS

The instrument has a s erial port that c an be used as RS485 or RS232. Opti onally it ’s possibl e to have
another RS485 port (S485) or a Profibus port (PF/S) or an Ethernet port (ETH) or an Ethernet port with
a RS485 port (ETH/S).

8.4.1) STANDARD SERIAL PORT

Through the combination of an asynchronous serial RS485 and RS232 communication line it is
possible to exchange information bet ween the instrument and PC, PLC or other c ompatible systems.
All transmitted characters are in ASCII (American Standard Code for Information Interchange) format.
RS485 allows a multi-drop connection, in order to link-up several instrum ents on the same network, on
the other hand RS232 allows a single point connection.
This last connection must be carried out when both systems are turned off and disconnected from the
power line, in order to avoid damages on the serial output.
RS232 may be 9 or 25 pin connection, please follow up the enclosed table:

Signal

Description

DB9

DB25

EMA90

DCD

Data Carrier Detect

1 8

RX

Receive Data

2 3 2

TX Transmit Data 3 2 1

DTR

Data Terminal Ready

4

20

GND

Signal GrouND

5 7 3

DSR

Data Set Ready

6 6

RTS

Request To Send

7 4

CTS

Clear To Send

8 5

RI

Ring Indicator

9

22

The maximum suggested length of a RS 485 connection is about 1200 mt., while for a RS232
connection about 5 mt.
For longer distances, cables with low attenuation, or connection to line amplifier are recommended.
Up to maximum 32 units can be wired on the same serial line (RS485), exceeding this number it is
imperative to insert a signal repeater, each repeater can manage up to 32 instruments.
The polling time is directly proportional to the instruments number connected on the same serial line.

EMA90 - USER MANUAL

-27-

8.4.2) RS485 CONNECTION NOT SHIELDED

Once a RS485 network has been configured; to communicate between the Host (computer) and the
instrument(s) (EMA) a serial interface converter must be wired between PC and instrument(s) as
mentioned on the above picture.
In serial line over 500 mt, connect a line termination resistor (Rt=100Ω - 120Ω) between the two
twisted pair cables leading from the converter at the end of the network (last connected instrument).
It’s recommended to use always twisted pair cable with minim um cross-section of 0.36mm

2

(22AWG)

and capacity less than 60 pF/m.

8.4.3) RS485 CONNECTION SHIELDED

Although the signal is given by the difference between A and B voltage, a ground connection is
needed to eliminate or to reduce the common mode noise induced (into the bus).
To reduce the EMI interferenc es need to connec t t he shield direc tly to a ground at one end and with a
series RC network at the other end.
R = 100Ω C = 33µF.
The max length of the stubs is 20cm.

RS232/RS485
converter

Max 32 EMA; max 1200

N

L N

S1 S2 S1 S2 S1 S2

I1 I2 I3

L1V

L2V

L3V

Vaux

Do2­Do2+

Di1+

Di1-

Di2+

Di2-

CE

N

L N

S1 S2 S1 S2 S1 S2

I1 I2 I3

L1V

L2V

L3V

Vaux

Do2­Do2+

Di1+

Di1-

Di2+

Di2-

CE

Di1+

Di1-

Di2+

Di2-

Di1+

Di1-

Di2+

Di2-

A

B

Do1-

Do1+

A

B

Do1-

Do1+

ABDo1-

Do1+

ABDo1-

Do1+

Tx

Rx

gnd

Tx

Rx

gnd

TxRxgnd

TxRxgnd

Rt

Max 32 EMA; max 1200 mt

RS232

A

B

Di1+

Di1-

Di2+

Di2-

A

B

Di1+

Di1-

Di2+

Di2-

A

B

N

L N

S1 S2 S1 S2 S1 S2

I1 I2 I3

L1V

L2V

L3V

Vaux

Do2­Do2+

Di1+

Di1-

Di2+

Di2-AB

CE

N

L N

S1 S2 S1 S2 S1 S2

I1 I2 I3

L1V

L2V

L3V

Vaux

Do2-

Do2+

Di1+

Di1-

Di2+

Di2-AB

CE

Do1-

Do1-

Do1+

Do1+

Do1-

Do1+

Do1-

Do1+

RS232/RS485
converter

TxTxRxRxgnd

gnd

TxRxgnd

TxRxgnd

EMA90 - USER MANUAL

-28-

8.4.4) RS232 CONNECTION

If a RS232 communication line is shorter of 5 mt. and a multidrop network will not use, it’s not
necessary to use a serial line converter because the serial output is compatible with the PC, as s hown
on the above mentioned picture.
A RS232 could reach 15mt. but the presence of noises in the industrial application could cause
breakdown in the communication.
The connection from EMA serial port RS232 to PC RS232 serial port is a PTP, Pin To Pin, connection.

SIGNAL

EMA90

DB9 (PC)

TX

1

PIN 2

RX

2

PIN 3

GND 3 PIN 5

RS232

N

L N

S1 S2 S1 S2 S1 S2

I1 I2 I3

L1V

L2V

L3V

Vaux

Do2­Do2+

Di1+

Di1-

Di2+

Di2-

A

B

CE

Di1+

Di1-

Di2+

Di2-

A

B

Do1-

Do1+

Do1-

Do1+

Tx

Rx

gnd

TxRxgnd

EMA90 - USER MANUAL

-29-

8.4.5) MODEM CONNECTION

To make the remote connection it needs to program the remote modem (connected to the EMA
network). To program this modem the user has to use any communication program like
HyperTerminal. The Hayes commands to program a standard modem are the following:

AT&D0&S0&C0&R1
ATS0=2
ATX3
AT&W0Y0

The meaning of the commands is the following (AT is the command prefix):

• &D0: ignore DTR.

• &S0: ignore DSR.

• &C0: ignore CD.

• &R1: ignore RTS.

• S0=2: set at two as the ring num ber aft er the which the m odem aut omaticall y reply (the num ber can

be different by 2, but it must be different by 0).

• &W0: store the configuration in the register 0 of the modem’s not volatile memory.

• Y0: set the configuration stored in the regis ter 0 of the modem’s not volatile memory as the default

configuration at the starting or the reset of modem.

See the modem’s user manual.

ELECTRICAL MULTIFUNCTION ANALYZER RECORDER

SELECT

P. UP

ENTER

P. DOW N

SELECT

ELECTRICAL MULTIFUNCTION ANALYZER RECORDER

SELECT P. UP ENTERP. DOWNSELECT

ELECTRICAL

MULTIFUNCTION A

NALYZER RECORDER

SELECT P. UP ENTERP. DOWNSELECT

ELECTRICAL

MULTIFUNCTION A

NALYZER RECORDER

SELECT P. UP ENTERP. DOWNSELECT

ELECTRICAL MULTIFUNCTION ANALYZER RECORDER

SELECT P. UP ENTERP. DOWNSELECT

It’s possible to manage the supervisioning of energy

consumption through remote structures as modem

application in order to cover big distances.

Rece iv e D ata

Transm it D ata

Signal GrouND

RS232 RS485

EMA90 - USER MANUAL

-30-

8.4.6) OPTION RS485 PORT (S485)

With this option the instrument will be equipped with 2 digital inputs, 2 digital outputs and 2 serial
ports.

Person al Com puter

Modem

N

L N

S1 S2 S1 S2 S1 S2

I1 I2 I3

L1V

2345689101112 7

1

L2V

L3V

TX

RX

COM

Di1+

Di1-

Di2+

Di2-

A

Vaux

Do2­Do2+

B

CE

Do2-

Do2+

A
B

0V

+5V

Rs485

A
B

0V

+5V

Do1-

Do1+

EMA90 - USER MANUAL

-31-

8.5) OPTION PROFIBUS PORT (PF/S)

If this option board is installed, the instrument will be equipped with n°2 digital inputs, n°2 digital
outputs, n° 1 serial port and a PROFIBUS port.

Profibus-DP is a multi-master systems. I n the networks it’s possible to have up to 126 devices on the
same bus. In profibus-DP networks, the interchange of data between peripheral modules and the
master is made automatically by the profibus controll er, which ‘virtualise’ the data exchange memory
of the DP devices in the memory of the master.

When “Ready” and “Data” LED blink the profibus communication is active.
In the following picture the pin-out of the Profibus-DP port:

1

Not connected

6 Power Supply (+5V)

2

Not connected

7 Not connected

3

RxD/TxD-P (B)

8 RxD/TxD-N (A)

4

RTS

9 Not connected

5

Gnd

The profibus interfac e detects automatically t he baud rate of the network; in the following table are
showed the baud rate available:

9.6 Kbit/s

19.2 Kbit/s

45.45 Kbit/s

93.75 Kbit/s

187.5 Kbit/s

500 Kbit/s

1.5 Mbit/s

3 Mbit/s

It’s possibile to request to the manufacturer application examples, GSD files and protocol manual
(IM157).

VL1

VL2

VL3

N

S2S2

S1S1 S1

S2

I3

I2

I1

Do1-

ABDi2-

Di2+

Di1-

Di1+

gnd

Rx

Tx

Do1+

Do2­Do2+

AUX

1 2

PROFIBUS

COM 2

DATAREADY

!

CAT. III

600V

PROFIBUS PORT

9-pin D (female)

Connector

15

9 6

EMA90 - USER MANUAL

-32-

8.6) OPTION ETHERNET PORT (ETH or ETH/S)

For Ethernet connection are available two type of option board: ETH and ETH/S.
ETH: with this option the instrument will be equipped with 2 digital inputs, 2 digital outputs, 1
ETHERNET port and 1 RS232 (COM1) and RS485 (COM3) s erial port . In this case COM1 and COM3
are the same port with different functioning modality: the first is a RS232, the second a RS485.
ETH/S: with this option the instrument will be equipped with 2 digital inputs, 2 digital outputs, 1
ETHERNET port and 2 separate serial ports, the COM1 (RS232) and the COM3 (RS485) t hat allows
the data collection or electrical parameters from others instruments connected in a RS485 network.

In the following picture is showed the RJ45 connector.

The Ethernet port of EMA90 incorporates 4 LED (2 status LED and 2 Ethernet status LED).
The green LED of Ethernet st atus, Link/ Data, is turned on when the Et hernet c able is plugged i nto t he
device. The LED blinks whenever an Ethernet pack is received. The yellow LED of the Ethernet status,
100BaseT, is turned on when the device l inks with the hub at 100Mb. T he LED is off when the link is
established at 10Mb.
The status LED indicates the c ommunication in transmiss ion TX (green LED) and the comm unication
in receiving RX (red LED).

The SERVICE button has the function to restore the default parameters following this steps:
Turn off the instrument.
Turn on the instrument.
Wait for end of blinking green LED.
Press and hold the button for at least 10 seconds.
Turn off the instrument.
Turn on the instrument.

VL1

VL2

VL3

N

S2S2 S1S1 S1 S2

I3

I2

I1

Do1-

ABDi2-

Di2+

Di1-

Di1+

gndRxTx

Do1+

Do2­Do2+

AUX

1 2

SERVICE

ETHERNET

COM 2

!

CAT. III

600V

Led Verde
Led Rosso

Led di stato

Led di stato
Ethernet

Led Verde

Led Giallo

EMA90 - USER MANUAL

-33-

9) USE

9.1) FUNCTION KEYS

• UP & DOWN KEYS
The “UP” and “DOWN” keys allows to skip through the real time pages and to
select the programming level or to modify values during the input in the set up
menu.

• LEFT & RIGHT KEYS
The “LEFT” and “RIGHT” keys allow to visuali ze t he real t i me sub pages and to
move the cursor in the field of input data i n the setup menu. To skip from real
time pages and to go in the menu setup it’s necessary to press simultaneous ly
both these keys. To come back at real time pages to repeat the same
operation. Other functions allow to see average values, minimum and
maximum, storage and harmonic components . W hen i t’s possible t o accede at these funct ion two little
arrows appear on the display’s bottom bar.

• “E NTE R” KE Y
“ENTER” key, if pressed for at least 3 seconds on any of the real time pages
(instantaneous value pages) sets the current visualized page as “MAIN PAGE”.
In the SETUP menu the “ENTER” key allows to enter in the setting menu or submenu in
order to program and/or set values and confirm the operation/s.

• SYSTEM RESET
To reset the unit direct ly from the keyboard without entering in
the Setup menu (where from there it is also possible to reset
the unit through Reset Global on chapter 11.12), operator may
press simultaneously the 4 arrow keys, after 2 seconds the
complete unit will be re-set.

10) REAL TIME VALUES

The real time pages show all the possible performed measurement of the instrument during the
evolution. All vis ual i zed pages m ay be set as main page by the operator, t hi s means that the preferred
page may be set as the one to be visualized. To set the main page the operator shall press the
"ENTER" key for at least 2 seconds, the symbol of t he main page is shown with a "#" on the top right
side of the display. T he visualization of real tim e m easure includes a sequence of pri ncipal pages, that
it’s possible to see pressing “UP and “DOWN” keys, and secondary pages that it’s possible to see
pressing “LEFT” and “RIGHT” keys when these symbols (◄ and ►) compare.

P. UP

P. D OWN

SELECT

SELECT

E

NTER

P. UP

P. D

OWN

SELECT

SELECT

EMA90 - USER MANUAL

-34-

10.1) VISUALIZATION TREE

H.I. 10-19 H.I. 20-29

H.I. 30-31

TB Energy

Yesterday

P3-P4

TB Energy

Previous Month

P3-P4

TB Energy

Previous Y ear

P3-P4

Min/Max

L1 Current

Min/Max

3 P H Av g

Watt

H.I 00-09

IL3

Harmonics

TB Energy

Yesterday

P1-P2

TB Energy

Previous Mont

P1-P2

TB Energy

Previous Y ear

P1-P2

Min/Max
3 Phase
Current

Min/Max

3 Ph Power

Factor

H.V. 30-31

IL2

Harmonics

L3 Phase V-C

L2 Phase

Reactive

Powers

TB Energy

2 Days Ago

P1-P2

TB Energy

2 Months Ago

P1-P2

TB Energy
2 Year s Ag

P1-P2

Min/Max

L2 Voltage

Min/Max

3 Ph Watt

Power

H.V. 10-19

VL3

Harmonics

Storage

Harmonics

L3 Phase

Apparent

Powers

TB Energy

2 Days Ago

P3-P4

TB Energy

2 Months Ago

P3-P4

TB Energy

2 Year s Ago

P3-P4

Min/Max

L3 Voltage

Min/Max

3 Ph Va

Power

H.V. 20-29

IL1

Harmonics

Storage

Samples

Total Energy

TB

P3-P4

CosΦ

Line Voltage

Avg Current

Thd Current

L2 Phase V-C

L1 Phase

Active Powers

TB Energy

Today
P3-P4

TB Energy
This Month

P3-P4

TB Energy

This Year

P3-P4

Min/Max

L1 Voltage

Min/Max

L3 Current

H.V. 00-09

VL2

Harmonics

Storage

Min./Max

Digital

Input

Warnings

Battery

User Page

Counters

Total Energy

TB

P1-P2

Power Factor

Total Energies

Phase Voltage

Line Current

Thd Voltage

L1 Phase V-C

3 - Phase

System

3 Phase

Powers

TB Energy

Today

P1-P2

TB Energy
This Month

P1-P2

TB Energy

This Year

P1-P2

Min/Max
3 Phase
Voltage

Min/Max

L2 Current

THD Volt-Curr

VL1

Harmonics

Clock

Calendar

Storage

Avg Powers

Digital

Output

Warnings

Connection

Info

General

22

21

20

19

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

1

22

Phasor

Average
Powers

Max.Demand

* * * * * *
* * * * * *
* * * * * *

*

*

** * * * * * *

* * * * **

*
**

***

O

ptions

P age displayed only i f the D igital Input is set

as COUNTE R.

P age displayed if the PF /S or ETH or E TH/S

option is installed.

Max

Avg Current

**

K Factor

Hour

Counter

Storage

Counters

Info

Options

Info

Plug

***

Total Energies

3

Total Energies

2

Total Energies

1

Total Energy

TB 2

P3-P4

Total Energy

TB 2

P1-P2

Total Energy

TB 1

P1-P2

Total Energy

TB 1

P3-P4

Total Energy

TB 3

P1-P2

Total Energy

TB 3

P3-P4

* ** ***

Tu r n O ff Tur n On

EMA90 - USER MANUAL

-35-

10.2) MEASURES VISUALIZATION

Variable reading of three - phase system

• (V - kV) RMS three - phase system voltage [∑ V

L-L

]

• (A - kA) RMS three - phase system current [∑I]

• (W - kW - MW - GW) three - phase system active power [Σ W]

• (PF) three - phase system power factor [∑PF]

• (F) frequency L1 [F

1

]

Variable reading of phase L1

• (V - kV) RMS voltage L1 phase [V

1

]

• (A - kA) RMS current L1 [I

1

]

• (W - kW - MW - GW) active power L1[W

1

]

• (PF) power factor L1 [PF

1

]

Variable reading of phase L2

• (V - kV) RMS voltage L2 phase [V

2

]

• (A - kA) RMS current L2 [I

2

]

• (W - kW - MW - GW) active power L2 [W

2

]

• (PF) power factor L2 [PF

2

]

Variable reading of phase L3

• (V - kV) RMS voltage L3 phase [V

3

]

• (A - kA) RMS current L3 [I

3

]

• (W - kW - MW - GW) active power L3 [W

3

]

• (PF) power factor L3 [PF

3

]

Voltage and current wave forms L1 line

In the “L1 Phase V-C” page are showed the voltage and current wave forms
with their peak values and c rest factors. The wave form of t he current has
the lower amplitude.

EMA90 - USER MANUAL

-36-

Voltage and current wave forms L2 line

In the “L2 Phase V-C” page are showed the voltage and current wave forms
with their peak values and crest factors. The wave form of the current has
the lower amplitude.

Voltage and current wave forms L3 line

In the “L3 Phase V-C” page are showed the voltage and current wave forms
with their peak values and crest factors. The wave form of the current has
the lower amplitude.

Variable reading of phase voltage

• (V - kV) rms voltage between L1 and L2 [V

1-2

]

• (V - kV) rms voltage between L2 and L3 [V

2-3

]

• (V - kV) rms voltage between L3 and L1 [V

3-1

]

• percentage of unbalance phase voltage [V

unb

]

Note: the unbalance voltage appears only if it’s defined in setup.

Variable reading of line voltage

• (V - kV) rms voltage L1 [V

1

]

• (V - kV) rms voltage L2 [V

2

]

• (V - kV) rms voltage L3 [V

3

]

• (V - kV) average line voltage [V

avg

]

• percentage of unbalance line voltage [V

unb

]

Note: the unbalance voltage appears only if it’s defined in setup.

Variable reading of line current

• (A - kA) rms current L1 [I

1

]

• (A - kA) rms current L2 [I

2

]

• (A - kA) rms current L3 [I

3

]

• (A - kA) rms neutral current N (showed only with connection 4 wires) [I

N

]

Note: At the bottom of t he page it’s showed the maximum of phases and
neutral currents (relative or absolute depending of t he enabling of MINMAX
in the STORAGE menu).
Note: In t he right side of the page the currents are graphical showed as a
percentage of full scale (5A or 1A). (1 = 100%, 1.2 = 120%).

EMA90 - USER MANUAL

-37-

Variable reading average line, three-phase system and neutral current

• (A - kA) rms average three - phase system current [Σ I

av

]

• (A - kA) rms average current L1 [I

1av

]

• (A - kA) rms average current L2 [I

2av

]

• (A - kA) rms average current L3 [I

3av

]

• (A - kA) rms average current N [I

nav

]

Note: The average current is calculated in the average time set in the setup.
The average neutral current will be showed only if the insertion type is 4
wires.

Variable reading maximum average line, three-phase system and
neutral current

• (A - kA) rms maximum average three - phase system current [ Σ I

av

]

• (A - kA) rms maximum average current L1 [I

1av

]

• (A - kA) rms maximum average current L2 [I

2av

]

• (A - kA) rms maximum average current L3 [I

3av

]

• (A - kA) rms maximum average current N [I

nav

]

Note: The maximum average current is calculated in the average time set in
the setup. The maximum average neutral current will be s howed only if the
insertion type is 4 wires.

Variable reading THD of voltage

• (Thd) total harmonic distortion of voltage L1 phase [Thd

1

]

• (Thd) total harmonic distortion of voltage L2 phase [Thd

2

]

• (Thd) total harmonic distortion of voltage L3 phase [Thd

3

]

Note: At the bottom of t he page it’s showed the absolute maximum values
of the three phases.

Variable reading THD of current

• (Thd) total harmonic distortion of current L1 phase [Thd

1

]

• (Thd) total harmonic distortion of current L2 phase [Thd

2

]

• (Thd) total harmonic distortion of current L3 phase [Thd

3

]

Note: At the bottom of the page it’s showed t he absolute maximum values
of the three phases.

Variable reading K factor

• k factor L1 phase

• k factor L2 phase

• k factor L3 phase

Note: At the bottom of the page it’s showed t he absolute maximum values
of the three phases.

EMA90 - USER MANUAL

-38-

Variable reading three-phase powers

• (W - kW - MW - GW) three - phase system active power [ΣP]

• (VAr - kVAr - MVAr - GVAr) three - phase system reactive power [ΣQ]

• (VA - kVA - MVA - GVA) three - phase system apparent power [ΣS]

• (P.F.) three phase system power factor [ΣPF]

Variable reading phase active power

• (W - kW - MW - GW) three - phase system active power [ΣP]

• (W - kW - MW - GW) active power L1 [P

1

]

• (W - kW - MW - GW) active power L2 [P

2

]

• (W - kW - MW - GW) active power L3 [P

3

]

Variable reading phase reactive power

• (VAr - kVAr - MVAr - GVAr) three - phase system reactive power [ΣQ]

• (VAr - kVAr - MVAr - GVAr) reactive power L1 [Q

1

]

• (VAr - kVAr - MVAr - GVAr) reactive power L2 [Q

2

]

• (VAr - kVAr - MVAr - GVAr) reactive power L3 [Q

3

]

Variable reading phase apparent power

• (VA - kVA - MVA - GVA) three - phase system apparent power [ΣS]

• (VA - kVA - MVA - GVA) apparent power L1 [S

1

]

• (VA - kVA - MVA - GVA) apparent power L2 [S

2

]

• (VA - kVA - MVA - GVA) apparent power L3 [S

3

]

EMA90 - USER MANUAL

-39-

Variable reading phase power factor

• (P.F.) three phase system power factor [ΣPF]

• (P.F.) power factor L1 [PF

1

]

• (P.F.) power factor L2 [PF

2

]

• (P.F.) power factor L3 [PF

3

]

Variable reading phase cosϕ

• (cosϕ) three phase system cosϕ [Σcosϕ]

• (cosϕ) cosϕ L1 [cosϕ

1

]

• (cosϕ) cosϕ L2 [cosϕ

2

]

• (cosϕ) cosϕ L3 [cosϕ

3

]

Phasor
Fresnel diagram.
Phase angles in degree, voltage, current and PF for each line.

User page
The user can define in the setup menu (General-User Page) the variables
to display in this page.

EMA90 - USER MANUAL

-40-

Variable reading counters

This page shows the 8 counters available.

Note: This page appear only if the digital inputs are set like COUNTERS.

Variable reading consumption of active and reactive
energy of the single phases and three-phase system
(Normal)

• (kWh) positive active energy counter [kWh+]

• (kWh) negative active energy counter [kWh-]

• (kVArh) inductive reactive energy counter [kVArh+]

• (kVArh) capacitive reacti ve energy counter [kVarh-]

Note: If Energy Type is set like Heavy the measure
units are expressed in MWh and MVArh.

Variable reading average powers

• (W - kW - MW - GW) average active power [P]

• (VAr - kVAr - MVAr - GVAr) average reactive power [Q]

• (VA - kVA - MVA - GVA) average apparent power [S]

• (W - kW - MW - GW) expected average active power [ExpW]

Note: The expected average active power is showed only if the “Load
Control” function is enabled.

Max.Demand

Max demand (max average power) of each band and total.

EMA90 - USER MANUAL

-41-

Variable reading time-band energy counters (option)

Note: These pages are displayed only if the option TIMEBAND is activated with the ACCESS code in
the menu GENERAL (see par.11.3).

26 pages to display the active energy counters (positive
and negative) and reactive (capacitive and inductive)
divided in 4 programmable time bands (P1 - P2 - P3 - P4).
The 26 pages are: consumption present year and the
two previous, consumption present month and the two
previous, consumption of today and the two day
previous, and total counter of bands for each phase
and for the three-phase system.
In a voice of menu setup (paragraph 11.6) it’s possible
to program times, days and months in which the
energy count is added at the different bands.
External signals, connected to digital inputs, and with
a right programming, can change the bands in the
time.
If the energy is Heavy the values are displayed in
MWh and MVArh.

Variable reading MIN & MAX values

12 pages (selected by “left” and “right” keys) show minimum and maximum of the value of 12
parameters taken after last reset. Date and time of reading are displayed on these pages.
It’s possible to see the values of these parameters:

• three - phase system voltage (ΣV

L-L

)

• L1 phase voltage (V

L1

)

• L2 phase voltage (V

L2

)

• L3 phase voltage (V

L3

)

• three - phase system current (Σ Ι)

• L1 phase current (I

L1

)

• L2 phase current (I

L2

)

• L3 phase current (I

L3

)

• three - phase system active power (Σ W)

• three - phase system apparent power (Σ VA)

• three - phase system power factor (Σ PF)

• three - phase system average active power (Σ W

av

)

EMA90 - USER MANUAL

-42-

Variable reading Thd of voltage and current (harmonics orders option)

Note: These pages are displayed only if the option HARMONICS is activated with the ACCESS c ode
in the menu GENERAL (see par.11.3).

A page shows the total harmonic distortion of voltage and of current:

• (Thd) total harmonic distortion of voltage L1 phase [Thd

1

]

• (Thd) total harmonic distortion of voltage L2 phase [Thd

2

]

• (Thd) total harmonic distortion of voltage L3 phase [Thd

3

]

• (Thd) total harmonic distortion of current L1 phase [Thd

1

]

• (Thd) total harmonic distortion of current L2 phase [Thd

2

]

• (Thd) total harmonic distortion of current L3 phase [Thd

3

]

8 pages show the harmonic c omponents (up to 31

st

) of voltage

and current of each line in numerical form.

Variable reading total harmonic distortion and harmonic components
of voltage and current (option).

6 pages of visualization of THD and harmonic com ponents (up to 31

st

with
fundamental frequency 50-60Hz) of voltage and current of each line
expressed in numerical and graphic form. Once entering in the harmonic
analyzes page, it may be possible with the right + enter & left + enter keys
to page through the order of the harmonics up to the 31

st

. The pages show
the histograms, the order of the harmonic and value referred to the
fundamental.

EMA90 - USER MANUAL

-43-

10.3) STATUS AND I NFORMATION PAGES

The status and/or information pages include:

• the displaying of clock and internal calendar

• the condition of internal RAM memory

• the condition of digital I/O

• warnings

• general info of the instrument

Clock/Calendar

• time format: hours, minutes, second (hh:mm:ss)

• date format: day, month, year (dd/mm/yyyy)

• day of the week

Condition internal RAM memory

5 pages (selectable with “LEFT” and “RIGHT” keys) of information on
condition internal RAM memory.
The internal memory is divided in 5 sections:

• storage values average powers [Avg. Powers]

• storage values relative minimum and maximum [Min/Max]

• storage values harmonic components [Harmonics]

• storage values samples [Samples]

• storage energies and generic counters [Counters]

Each section is displayed in own sub page.
The page shows the following information:

• Type of section of memory (for examples samples).

• Status, "ON" if memory enabled or "OFF" if memory disabled.

• Record(s), number of stored events in memory.

Memory (Kb)

• Available, static memory, expressed in Kb, which is available to

store data for this section.

• Used, dynamic memory, expressed in Kb, which is used by data

already stored (record stored).

• Free, dynamic memory, expressed in Kb, which is free to store data.
Used & Free memory are working together, blocks of memory are

transferred from Free m emory to Used memory in order to s t ore the values
on the RAM of the instrument. Initially the available memory will be totally free but at own exhaustion it
will be totally used. Thes e i nf orm ati on are very important to avoid to delet e stored data, to choose how
to storage the data on the basis of available memory.

Digital I/O – Hour Counter

The Digital I/O pages show the status of the digital
inputs and outputs, for each is indic ated if the contact is
closed (ON) or opened (OFF). T he symbol "---" indi cates
that none output/input is present on the hardware (these
are inputs / outputs optional).
On the page Hour Counter is showed the incremental
time of activation outputs.

EMA90 - USER MANUAL

-44-

Warnings

To see “warnings” are available 4 pages.
The

first page shows the correct connection of the instrument: the current

transformer connection for current input and the phases sequence for voltage
input. If at least one of current transformer is inverted, the display shows
“Warning CT”, otherwise “CT OK”. If the phases sequence of voltage inputs is
inverted will appear “WARNING!”, otherwise “Phases sequence OK”. “No Info,
Please Wait” message appears during the elaboration to establish the phases
sequence. The information on phases appears only if the three phase system
voltage is higher of 10V, otherwise the display shows: “Low voltage, No Info”. If the voice of menu
Setup|General|Warnings is “Yes”, the warnings page of CTs inversion and phases sequence will be
display automatically alternatively at the default page each time that happens an inversion.

The second page shows the situation of internal battery.
If the voltage level of int ernal battery is lower of 2.3V on displ ay will appear
“Battery LOW”, otherwise “Battery OK”. This page will be displayed
independently of the voice of menu Setup|General|Warnings when the
voltage level is lower of 2.3V.

Warning. If there’s no battery or its voltage level is lower than 2.3V the
instrument will lose al l storing data in RAM, minimums, maximums, energy
counter, and the setup).

On the third page (Turn-Off) appears date and hour of the
last of 10 events of voltage lack on one phase at least on
measure line or the instrument shut off. On the fourth
page (Turn-On) appears the events of the voltage come
back at least of one phase or when the instrument turn
on. On both pages the three values of the right column
have the means indicated in the following table:

VL1

VL2

VL3

Means

VL1

VL2

VL3

Means

0 0 0

Turn off/Turn on instrument

1 0 0

Lack/ Come back voltage on L1

0 0 1

Lack/Come back voltage on L3

1 0 1

Lack/ Come back voltage on L1 and L3

0 1 0

Lack/ Come back voltage on L2

1 1 0

Lack/ Come back voltage on L1 and L2

0 1 1

Lack/ Come back voltage on L2 and L3

1 1 1

Lack/ Come back voltage on L1, L2 and L3

The number 10 will be the last event. The oldest will be the number 1. The newest event will take the
tenth position that will be free thanks to the up shift of the all others events. The oldest will be deleted.

General info

The

instrument has 2 Info page if the PF/S (Profibus port) or

ETH, ETH/S (Ethernet port) option boards are not installed: in
the first appears the information on the model, version
firmware, installed memory, the number of I/O, the type of the
second serial port installed (“no” to indicate the absence) and
the communication protocols used; in the second
appears the indication of the enabling (yes) or
disabling (no) of the options as Timebands,
Harmonics and Load Control. If one of the three
optional pages is installed, the info pages will become
three: at the two pages described before the page
with info on the option port installed will be added.
These information that i dentify the instrument and its
configuration are useful for eventual upgrade.

EMA90 - USER MANUAL

-45-

11) SETUP

11.1) SETUP ITEM

GENERAL

KCT

KCT-Pri. (1÷5000)
KCT-Sec. (1;5)

KVT

KVT-Pri. (1÷400000)

KVCT-Sec. (1÷750)
Mode (4 wires -3 wires -Aron)
Measure Time(050 sec.)
Warnings (Yes-No)
B.Light (0360)
Display (Positive-Negative)
DefPage Time (109 00 sec.)
SYNC.

Mode(EXT-INT)

Freq. (5500)
CLOCK

Set Clock

Day Light (Enable-Disable)
PASSWORD

Value (00009999)
ACCESS (000000999999)
User Page

Measure 1 (list of parameter)

...............

Measure5 (list of parameter)
V Unbalance (V

LL-VLN

)

SERIAL COMM

Address (Modbus: 01255; ASCII: 01128)
COM1

Protocol (ASCII; Modbus)

Baud (120038400)

Parity(none-even-odd)

DataBit (7-8)

Type (RS232-RS485)
COM2

Protocol (ASCII; Modbus)

Baud (120038400)

Parity (none-even-odd)

DataBit (7-8)

Type (RS232-RS485)

AVERAGE

Sync Avg ( Int.Rtc -Ext.DI-Int+Ext)
Type ( fixed-Mobile)
Time Avg (1-2-3-5-6-10-12-15-20-30-60)
dt Mobile (1 0”-20”-30”-1’-2’-3’-5’-10’-15’-20’-30’)

ENERGY

Type ( Normal-Heavy)
PRESET

ENERGIES

KWh+ (099999999.9)
KWh- (099999999.9)
KVArh+ (099999999.9)
KVArh- (099999999.9)

COUNTERS

Counter1 (099999999.9)

.........

Counter8 (099999999.9)

TIMEBANDS

Update day (131)

Period Id (0115)

BAND

Start

Month
Day

Stop

Month

Day
WeekDay
Time1

StartHour

StartMin

Type (P1,P2,P3,P4,P5,P6,P7,P8)

.........

Time12

StartHour

StartMin

Type (P1,P2,P3,P4,P5,P6,P7,P8)

HOLIDAYS

Day Index (140)
Month (112)
Day (131)

LOAD CONTROL

Enable (Enable-Disable)
Contract Power

P1,..,P 4 (0 9999999.99 kW)

Fixed P ower

P1,...,P 4 (09999999.99 kW)

Safety Limi t

P1,...,P4 (050%)

Intervention Limit

P1,...,P4 (0100%)

Load Power

Load 1,...,Load 6 (09999999.99 kW)

Priority On

L 1 ON,.. .,L 6 ON (09)

Delay On

L 1 ON,.. .,L 6 ON (03600 sec.)

Priority Off

L 1 OFF,...,L6 OFF (09)

Delay Off

L 1 OFF,...,L6 OFF (03600 sec.)

STORAGE

MIN MAX

Enable (On-Off)
Measures (list of parameters)

Rate-min. (19999)
AVG.POW.Enable (On-Off)
HARM. E nable (On-Off)
COUNTER

Enable (On-Off)

Energy-Gen. (list of p arameters)

Tot. TB1-2 (list of parameters)

Tot. TB3-4 (list of parameters)

Rate (1’,15’,30’,1h,12h,1day,1week,1month)
TRIGGER

Enable (On-Off)

Time-min. (19999)

DIGITAL OUTPUT

Out Inde x (16)
Type ( Always Off-EnergyPulse-Min.Thresold-MaxThresold-Band­AlwaysOn)
Measure Code (list of parameter s)
Value
Time (50500)
Hysteresis (099)
Inf Value
Sup Value

DIGITAL INPUT

Type (Not used, Clock Sync., Period, Counters, Ext.DI)
COUNT->INPUT

K1Dig.Inp. (08)

.........

K8Dig.Inp. (08)
COUNTER NAME

Cnt1(User Def,KWh+,KWh-,

KVarh+,KVarh-,Water,Gas, RPM)

.........

Cnt8(User Def,KWh+,KWh-,

KVarh+,KVarh-,Water,Gas, RPM)
SET WEIGHTS

K1(01999.99)

.........

K8(01999.99)

ANALOG OUTPUT

Out Inde x (14)

Type ( 0-20mA; 4-20mA)

Measure Code (list of par ameters)

Min.

Max.

RESET

RESET MEASURES

All (Yes-No)

Energ ies (Y es-No)

TimeBands (Yes-No)

Min/Max (Y es-No)
Reset Setup (Yes-No)
Reset Stora ge (Yes-No)
Reset C ounter (Yes-No)
Reset Max.Demand (Yes-No)
Reset H our-Cnt. (Y es-No)
Reset G lobal (Yes-No)

EXIT SETUP

Note: Remember always to conf irm the entering, exiting or programming always with the “ENTER”
key, the last modification will be kept in the non volatile memory of the equipment unt il further reset of
the system.

EMA90 - USER MANUAL

-46-

11.2) MAIN MENU SETUP

The main menu or SETUP page is configured in the following way:

• GENERAL, includes the settings of KCT (current ratio), KTV (voltage
ratio), MODE (4 wires, 3 wires, Aron), MEASURE TIME (time constant of
measure filter), WARNINGS, B.LIGHT (Backlit on display timing),
DISPLAY (positive or negative vis ualization), DEF. PAGE TIME (time of
wait before to come back to default page), SYNC. (frequency
synchronization), CLOCK (clock settings), PASSWORD (pin-code to
avoid that someone not authorized could modify the setup), ACCESS
(code to enable option functi on like harmonics and/or tim e-bands and/or load control), USER PAGE
(to set the measures to display in user page) and V UNBALANCE.

• SERIAL COMM, includes the settings of PROTOCOL (ASCII or MODBUS), ADDRESS (logical
number, node or address), COM1 (serial port 1, integrated), COM2 (serial port 2, expansion board).

• AVERAGE, includes the s ettings of SYNC. AVG (synchronism of calculati on average), TYPE (fixed
or mobile), TIME AVG (integration time for the calculation of the average parameters) and DT
MOBILE (sliding time of window mobile).

• ENERGY, includes the s etting of TYPE (energy counters in kWh or in MWh), PRESET (allows t o set
the initial value of total ENERGY count er and the generic COUNTERS) and TIMEBANDS (with all
parameters to manage the power consumption in different periods).

• LOAD CONTROL, includes the setti ngs of the load control function. This menù i s manageable only
if this function is enabled with the enable code to set in ACCESS in the GENERAL menù. This
function allows the visualization of the expected power value (ExpW).

• STORAGE, inc ludes the settings of MINMAX (minimum and maximum values storing), AVG.POW.
(the average consumption of act i ve and reacti ve powers s toring), HARM. (harmonic storing up to t he
31

st

order for both c urrent and voltage for each line), COUNTER (energies and generic counters),

TRIGGER (start of storing from pulse on digital input).

• DIGITAL OUTPUT, sets the OUT INDEX number of digital output, TYPE (type of alarm; always on,
max. threshold, min. threshold, external band, energy pulse, always off), MEASURE CODE (the
parameter to associate with the digital output), VALUE (the value to set as threshold or, pulse),
TIME (delay time by enabli ng the digital output or duration of im pulse), HYSTERESIS, INFVALUE
and SUPVALUE (lower value and higher value for alarm of external band).

• DIGITAL INPUT, sets the type of acquisition: Not used, Clock Synchronization, Periods, Counters
(INPUT, NAME, WEIGHT) or External Sync hroni zat i on.

• ANALOG OUTPUT, set the analog output number, OUT INDEX, TYPE (disable, 0-20mA and 4-
20mA), MEASURE CODE (the parameter to associate at analog output), MIN and MAX (lower value
and higher value of the variable to associate at current output).

• RESET, allows to make a RESET MEASURES, RESET SETUP, RESET STORAGE, RESET
COUNTER, RESET MAX DEMAND, RESET HOUR-CNT and RESET GLOBAL.

• EXIT SETUP, allows the operator to exit from the main menu or setup page in order to reach the
instantaneous value page. Before exiting the page the instrument will question the operator if he
might to save the STORAGE Setup in case one or more parameters have been modified.

All the above mentioned voices will be described on the following chapters.

EMA90 - USER MANUAL

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11.3) GENERAL

The general menu is subdivided in the following sub menu:

• KCT, allows to set the c urrent transforming ratio setting the primary and
secondary values of the CT, if it’s used, in order to show the measured
values in primary terms . Primary Range: 1÷5000A; Secondary Range: 1
or 5A (for EMA90-1A is fixed to 1). I.e. Set KCT-Pri.=200 and KCT­Sec.=1 if a CT used is an 200/1 A.

• KVT, allows to set the voltage transforming ratio setting the primary and
secondary values of the VT , if it’s used, in order to show the meas ured
values in primary terms. Primary Range: 1÷ 400000V; Secondary Range:
1÷750V. I.e. Set KVT-Pri.=20000 and KVT-Sec.=100 if a VT used is an
20000/100V.

• Mode, concerns the operat ion or m easuring mode, it is possibl e to select
4 wires, 3 wires and Aron, following the connect i on m ode as described on
chapter 6.4).

• Measure Time, is the filter time in the visualization measure. T he range is
0÷50. The 0 value indicates none average on the measures, others
values indicates the average time (in seconds). If this value is very big
and the average powers storing is active, the values stored could be
wrong. It’s better to set a value less than 5 seconds.

• Warnings, enables [Yes] or disables [No] the visualization every 15 second of the warnings page
alternatively at default page i f current t ransf ormer connecti on is wrong or there is an inversi on of the
phase sequence. The condition of battery low, it will appear independently of the set of this voice.

• B.Light, is the time (from 0 to 360 seconds) in which the display remains on, after the keyboard’s
inactivity. To hold the display always on, it has to be set the value as 0. The brightness of display
declines about 10% every 1000 hour of work.

• Display, it’s possible to choose between positive visualization (dark characters on clear
background) and negative visualization (clear characters on dark background).

• Def. Page Time, is the time of wait before to come back to default page. Range 10÷900 seconds.

• Synchronization, to set the fundamental frequency.

Mode: internal or external (V

L1

).

Freq.: programmable frequency value (range 5÷500Hz).

• Set Clock, sets the internal clock of the instrument with relative date. The
format of the date is: dd:mm:yy and of the time is: hh:mm:ss
Day Light allow to set the yearly summer time change. It’s possible to
enable the time s hift of the summer time and t he return at the solar tim e
at the fixed data. The instrument manages the summer time from the
1997 to the 2030.

• Password, it’s possible to set a numeric password to modify the SE TUP.
The default password is 0000: the s etup can be always opened and it’s always possible to change
any parameter. If the password is different by 0000 (from 0001 to 9999), at the entrance of setup,
the password will be request. if the password is ignored, it will be possible to see every parameter
but it will be impossible to modify it. Only with the correct password it’s possible t o change every
parameter. To set the new password as 0000, the instrument come back at default status. Call the
constructor to have an emergency password if you lose the password.

• Access, allows to input a code of 6 digits to enable the calculation and
the visualization of the harmonics and/ or the time-bands and/or the load
control function. The code is showed on the tes t report associated to t he
instrument and it can be requested to the manufacturer that needs to
know the serial num ber and the option/s t o enable. In basic version of the
instrument no option is enabled, in a H type the Harmonics and
Timebands are enabled.

• User Page, select 5 parameters to visual i ze in the relative page.

• V

Unbalance calculates the voltage unbalance between the line or phase.

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11.4) SERIAL COMM

The SERIAL COMM menu allows the programming of t he communication
parameters of the COM1 and the option COM2.

• Address, is the address, node or logic number f rom 01 t o 255 in Modbus
or from 01 to 128 in ASCII or from 1 to 126 in Profibus (with Profibus
option board inserted). This number identif ies the node in a network and
consequently the instrument or the peripheral of a serial multidrop
network.
This parameter is set freely. This parameter is set automatically using NRG software with ASCII
protocol while with MODBUS protocol it must be set.

• COM1/COM2, are configured by the following submenus:

- Protocol, can be chosen between ASCII and MODBUS. The COM2 can be fixed on PROFIBUS-

DP or MODBUS TCP if it’s installed the PF/S or ETH option.

- Baud, transmission speed, programmable from 1200 to 38400 bps.

- Parity, parity sequence, programmable NONE-EVEN and ODD.

- DataBit, number of data bits, programmable 7 or 8 bit.

- Type, (voice t hat appears only for COM2 menu), is t he t ype of serial port. It can be “RS485” or not

installed “none”. In COM1 menu this voice doesn’t appear because it’s managed as RS232 and
RS485 by hardware.

Note: If the PF/S or ETH opti on is used the COM2 menu remain clos ed. The protoc ol on COM2 will
be PROFIBUS-DP or MODBUS TCP and the baud rate will be detect from the communication bus
and it’s set automatically (see protocol manual).

11.5) AVERAGE

The AVERAGE menu allows the settings of parameters in the calculation of
average values.

• S ync Av g, defi nes the type of the s ynchronism for t he start and the stop
of the average calculation. Three mode of use are available:

- Int.Rtc.: use the internal clock as time based line. The average

calculation start when the clock changes the minute.

- Ext.DI: use the digit al i nput 2 (Di2) to synchronize the start and the stop

of the average calculation. The digital input will be set as ExtDI automatically.

- Int+Ext: mixed mode. The digital input will be set as ExtDI automatically.
No congruent operation of digital input type and Sync. Avg will involve the
visualization of the warning message on the display (see for example in
this figure).

• Type, defines the type of the window used to the average calculation:
fixed (the updating depends of the A verage time) or mobil e (the updating
depends of dt Mobile).

• Time Avg, integration time for the calculation of the average parameters.

• dt Mobile, defines the updating time in window mobile of the average

parameters.

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11.6) ENERGY

In the ENERGY menu it’s possible to modify the unit of measurement of
energies, to set at the initial value the generic and energy counters, to
manage on the time-bands.

• Type, allows to c hoose the unit of measurement for the energy counter
kWh (Normal) or MWh (Heavy).

• PRESET, allows to set at initial value the energy counters and generic
counters.

- ENERGIES, it’s possible to set energy total counters at initial value.

These values are expressed in kWh and kVArh; the visualization on
total energies page will be congruent with the type of energy (Normal or
Heavy). The time bands counters don’t consider the preset values. Only
total energy counters consider these values.
This function is useful for example to compare the consumption with an
energy counter already in use.

- COUNTERS, it’s possible to set the 8 generic counters at initial value.

• TIMEBANDS (OPTION), it’ possible subdivide the energy consum ption in
12 time bands . In this way it’s possible to value the energy cos ts where
the energy suppliers apply the t ime band tariff or it’s necessary to divide
the consumption in diff erent period. To program the time bands function
to accede at the TIMEBANDS menu with the following sub menu:

- Update day, sets the day in which change the month in the time bands

(range 0÷31). If the value is 0, from the last day of each month the
energy is increased in the counter of the next month. If the value is
between 1 and 15, from the day fixed the energy is increased in the
counter of the actual month, before of t hi s value the energy is increased
in the previous month. If the value is bet ween 16 and 31, from the day
fixed the energy is increased i n the counter of the next month, before of this value the energy is
increased in the actual month. If the actual month has fewer days than the value fixed, the energy
will be increased into the next month counter from the last day of the month.

- Period Id, period number. 15 periods to set different tim e bands. For each period it’s pos sible to

program:

- BAND, to program the selected period.

- Start / Stop, to program the start and the stop of the selected period.
Month, is a number from 1 to 12 that defines the months (1 January,
2 February, ecc.) of the year corresponding at the start (or the end) of
the selected period.

Day, is a number from 1 to 31 that defines the day of the month
corresponding at the start (or the end) of the selected period.
The programming is the same of the month programming.

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WeekDay, defines the days of the week in the s elected peri od in which
the tariff programming is active.
Use the “LEFT” and “RIGHT” keys to select the day of t he week and t he
“UP” and “DOWN” keys to enable or disable the day.

Time (1 - 12), def ines the time of the day in which the energy counters
are subdivided in the 4 time bands P1, P2, P3, P4, to set the time
bands are available 8 different times.
Inside the Time it’s possible to set the hour (StartHour) and the
minutes (StartMin.) in which the time band starts. Select Type, insert
the band P1, P2, P3 or P4 to link at the cons umptions.
The set band will finish when another band will st art or at the end of the
day. For example if the energy c onsumption from 8.00 to 12.00 are in
the band P2 and from 12.00 to 18.00 in t he band P3 it’s necessary to
set 8.00 like start time (StartHour and StartMin) in TIME 1 with band P2
(Type), 12.00 like start time (StartHour and StartMin) in TIME 2 with band P3 (Type) and 18.00 like
start time (StartHour and StartMin) in TIME 3 with band P1 (Type); in this way the P1 band will
maintain until 8.00 of the day after without other programming.
P1 band is the most economic and the P4 band is the most expensive.

• HOLIDAYS
It’s possible to program the days in the year in which the time bands
programmed are not used and the energy consumption end up in the
economic band (P1). This function can be useful in holiday or in days in
which the energy suppliers apply different tariff of others days.

It’s possible to program:

• Day Index, allows to set 52 different days like holidays. After the index,
define the day of the year.

• Month, is the month of the day in programming. One number from 1 to 12 defines the month (1
January, 2 February, etc.)

• Day, is the day of the month corresponding at the holyday: from 1 to 31.

Example:
New year’s day 1 January
Day index = 1
Month = 01 (January)
Day = 01

Christmas 25 December:
Day index = 2
Month = 12 (December)
Day = 25

The consumption of this special feature, if used, will be saved, always, into the tariff P1.

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11.7) LOAD CONTROL (OPTION)

Note: These pages are displayed only if the option LOAD CONTROL is
activated with the ACCESS code in the menu GENERAL (see par
par.11.3).

The load control function allows to switch of f the load when the expected
average power exceeds the set value (Contract Power).
The setting in the menu AVERAGE –Type (s ee par. 11.5) allow to choose if
the expected average power is calculated at fixed or floating window.

Enable / Disable, for default is disabled (Disable), if enabled (Enable) the load control will be
activated, the standard and optional digital outputs will be used for this funct ion and they lose each
other programming (i.e. pulse, threshold, etc.).

• Contract Power, indicates the threshold powers (contract ual) expressed

in kW for each time band.

• Fixed Power, indic ates the minimum fixed powers expressed in kW for

each time band that cannot be disconnected.

• Safety Limit, is a percentage reduct ion of t he Contract Power. The loads

disconnection starts when an expected average power, for each time
band, exceeds this value.
Range: 0% (Contract Power) ÷ 50%.

• Intervention Limit, is a percentage of the Safety Limit. An average

power below this value does not determine t he load disconnection in case
of exceeding the expected average power of the Safet y Limit value.
Range 0% ÷ 100% (Safety Limit).

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• Load Power, indicates the rated powers expressed in kW of the all loads.

The Load 1 corresponds to digital output 1 (Do1) and so on…

• Priorit y O n , indicates the connection priority of each load. The load with

8 priority will be the first to be connected, while the load with 1 priority will
be the last. The 0 priorit y indicates load always dis connected while the 9
priority means that the load is always connected. The default value is 0.

• Priority Off, indicates the disconnection of each load. The load with 1

priority will be the firs t to be disconnected, while the load with 8 pri ority
will be the last. The 9 priorit y indicates load al ways connec ted while the 0
priority means that the load is always disconnected. The default value is

9.

• De la y On, indicates the m inimum time, expressed in s econds, for which

the load must be connected (ON) before being disconnected. Range
0÷3600 seconds.

• De la y Off , indicates the minimum time, expressed in seconds, for which

the load must be disconnected (OFF) before being connected. Range
0÷3600 seconds.

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11.8) STORAGE

The STORAGE menu allows the programming of the data to store. 4
archives of storing exist:

- relative minimums and maximums

- average powers

- harmonic components

- counters

- samples (only with NRG software or serial command)

The storage is organized as FIFO (first in first out ) type memory. When the
memory is full older data will be overwritten by new data.

• MINMAX
The acquisition time is expressed in minut es, up to 12 MIN & MAX values
are stored.
Enable, to enable (On) or to disable (Off) the MIN & MAX values
acquisition.

Measures, parameters to store.
Select the variable to store in the minimums and maximums with the
“LEFT” and RIGHT” keys, enable or disable this variable with “UP” and
“DOWN” keys.

Rate – min., acquisition time.
This is the acquisit ion time of minimum and maximum values: range 1 ÷
9999 minutes. For example to store the minimum and the maximum value
of programmed parameters each 15 minutes it’s necessary to set 15.

If the storing of minimum and maximum values is enabled the values shows in
the relative page are updated at the same acquisition time set for the storing in
memory. Minimum and maximum values are not absolute any more.

• AVG.POW. (Average Power)
Storing of average active and reactive power. It’s possible to enable or disable the storing. The
sampling time is set at 15 minutes but it’s modifiable (Time Avg).

• HARM. (Harmonics)
Up to the 31

st

harmonics are stored for each line both of voltage and current channels.
Enable, the operator may enable or disable the storing of harmonic values.
The sampling time is fixed at 15 minutes and it’s not modifiable.

• COUNTER
Enable, to enable (On) or to disable (Off) storage of counters (4 energies, 8 generic, 16 time bands).
ENERGY-Gen., allows the selection of generic and energy counters to store. Use the “right” and

“left” keys to select the counter and the “up” and “down” k eys to enabl e or
disable.
Tot. TB1-2, Tot. TB3 -4 al lo ws the selecti on of the band counters to store.
To do the selection it’s necessary to operate as in ENERGY-Gen.
Rate, sampling time.
The sampling time of the counters is selectable: 1, 15, 30 minutes; 1, 12
hour; 1 day, 1 week, 1 month.

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• TRIGGER
Enable, the operator may enable or disable the TRIGGER function.

If Enable is OFF the enabled archives store the measures with the
relative rate, all of time.
If Enable is ON, the enabled archives store the measures with the
relative rate only aft er t he receiving of a pulse on digi tal input 2 (DI2). The
storing will be active for t he set time in Time-min. If there is no enabl ed
archives the trigger function has no effect.

Time-min. defines when the storing time is active.
With a logic level 1 (voltage present) on the digital input 2 (DI2) the timer rel at i ve t o Time-min will be
reset and the storing enabled. Only when the signal go down, the counting starts. The range is
1÷9999 minutes and the default value is 60 minutes.

No congruent set between TRIGGER storage enabled and Type of the
digital input will involve the vis ualization of the warning message on the
display (see for example in t his figure). An affirmative answer will enable
the TRIGGER function and the setting of the digital input will be set to Not
Used.

If any of the above mentioned parameters relative to MINMAX, AVG.POW.
and HARM. has been enabled for storage, by exiting the setup menu a brief
message will appear, asking the operat or to erase all the previous stored
data, in the memory, in order t o enable a new recording cam paign at empt y
memory with no residual information’s.
The data downloaded on PC using NRG software or communication
protocol does not come deleted and for this reason it’s possible t o recover
them using the function of communication protocol.

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11.9) DIGITAL OUTPUT

The digital outputs can be programmed to function like alarm (overload,
load management for consumption optimization, etc.), or pulses emission
for energy calculation or remote activation using soft ware NRG. I f an output
is set as alarm the hour counter associated will be activated.

• Out Index, expresses the number of output, from 1 to 6 (DO1 and DO2
standard), to select or program, whic h are present on t he hardware of t he
instrument.

• Type, all ows t o select the type of funct i oni ng as:

- A l ways Of f: digit al output is always disabled.

- E nergy Pulse: pulse emission proportional at energy registered and depending the programming

used (valid only for Energies). Maximum output frequency 16Hz.

- Min. Threshold: the output is enabled if the value of the selected variable is lower of the

programmed value.

- Max. Threshold: the output is enabled if the value of the selected variable is higher of the

programmed value.

- Band: the output is enabled if the value of the selected variable is lower of the programmed

minimum value or higher of the programmed maximum value.

- A l ways On: di gital output is al ways enabled.

• Measure Code, is the measure (see cap.12) to associate at the digital output. To program the digital
output as pulse emission it’s necessary to select an energy variable.

• Value, intervention threshold value (i.e., for overcoming 340V program 340.0, or 150kW program
150000,0) or pulse weight (i.e., if the active positive energy pulses must be emitted every 1 kW h
program 1.00) programmable from 0,01 to 100 kWh/pulse.

• Time, is the threshold delay for intervention expressed in second (0-655 seconds) or duration time
of Pulse expressed in milliseconds (50-500 ms).

• Hysteresis, it’s the percentage of alarm’s value under which the alarm come back in off condition:
it’s programmable from 0 to 99% (example: max threshold of active power at 150kW with 10%
hysteresis means the alarm come back in off condition when the active power will be 150­15=135kW). It’s not available in Pulse mode.

• InfValue and SupValue, low limit and high limit of alarm in band way.

Note: digital output management for P.F.-cosΦ.
In the P.F. and cosΦ the absolute minimum is cons idered the 0 c apaci tive and t he absolut e maximum
the 0 inductive.
To set an alarm when the cosΦ is less than e.g. 0.9 inductive (in the direction of 0 inductive) it’s
necessary to set MAX threshold m ode. Instead of this, to set an alarm when cosΦ is more than e.g.

0.9 inductive (in the direction of 0 capaciti ve) it ’s necessary t o set MIN threshold m ode. I n BAND mode

there will be alarm when the cosΦ value will be extern to the set band (infvalue÷supvalue): the i nfvalue
must be the value nearest at the 0 capacitive.
Example:

00.10.2

0.3

0.40.50.60.70.80.9

CAP

IND

Min threshold

0 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 -0.8 -0.9

-1

1

CAP

00.10.2

0.3

0.40.50.60.70.80.9

IND

Max threshold

0 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 -0.8 -0.9

-1

1

00.10.2

0.30.40.50.60.70.80.9

CAP

IND

Band

0 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 -0.8 -0.9

-1

1

ON OFF

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11.10) DIGITAL INPUT

In the DIGITAL INPUT menu it’s possible to program the digital input
function for both standards and options. The 2 standards digital i nput can
be programmed how follow:

• Type, defi nes t he type of operation:

- NOT USED: if none input is selected or enabled.

- CLOCK SYNCRONIZATION: Synchronization of the internal clock.

When the impulse arrives on digi tal input, the internal c lock’s seconds
counter is cleared if it ’s between 00 and 29, while if it’ s between 30 and
59, it’s cleared and the minutes counter go on the next minute.
Example:
17:31:23 (hh:mm:ss) will be 17:31:00 08: 45: 55 (hh:mm:ss) will be 08:46:00

- P ERIOD: to change the bands for the energy counter with time bands.
The following table shows the time band selected depending of the status of digital inputs:

DIGITAL INPUT 2

DIGITAL INPUT 1

BAND SELECTED

OPEN

OPEN

P1

OPEN

CLOSED

P2

CLOSED OPEN P3

CLOSED

CLOSED

P4

CLOSED: there is a voltage from 12Vcc and 24Vcc.
OPEN: the voltage is 0Vcc.

The change of band happens when the inst rument recognizes a change of st atus on one of di gital
input at least.
At the moment of the digital inputs enabling like “Periods” and at the EMA’s turn on with the
enabling already set, the energy counters increment continue on the last band enabled
independently of the digital inputs status until t he change of the minute of t he internal clock or t he
change of the status of one of digital input.

- COUNTERS: the generic counters are enabled. When an input receives a pulse, the counter,

joined at this input, is increased by the value that depends of the weight set.

- E xt.DI: the funct ion depends of the Sync. Avg s et in t he menu AVERAGE (par. 11.5). If Sync. Avg

is Int.Rtc a signal (12÷24Vcc) on the digital input 1 change the band (from P1 to P2 and vice
versa) while a signal (12÷24Vcc) on the digital input 2 is used to synchronize the average and t he
average powers storing (if enabl ed) with a de-bounce time of 30 seconds. The digital inputs are
set automatically to Ext.DI if the Sync. Avg is set to Ext.DI or Int+Ext.

No congruent operation of digit al input Type and Sync. Avg will involve
the visualization of the warning message on the display (see f or example
in this figure). An affirm ative answer will confirm the new setting on t he
digital input and the setting of Sync. Avg to Int.Rtc.

No congruent set between the Type of digital inputs and the TRIGGER
storage will involve the visualization of the warning message on the
display (see for example in this figure). An affirmative answer will confirm
the new setting on the digital input and the disabling of the trigger storage
function.

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An item selected in the menu “TYPE” of the digital inputs will be accepted
only if the reset of the counters is confirmed.

• Count. => Input, define the correspondence between the index of the
counter and the digital input. It’s necessary t o set the index of the digital
input to join at each count er used. The counter isn’t able to count if the
index inserted is 0.

Note: It’s possible to join the same input at more counters.

• Counter Name, allows to define the name for each counters. Using the
“up” and “down” keys it’s possible to choose the counter that will be
selected with the “Enter” key. In the same way it’s possibl e to choose and
set the name of the c ounter. The first item al lows to set a user definit ion,
the others are names already fixed.

- US E R DEF. The name of the counter is defined by the user.

When this item is selected, a field appear to input the name of the
counter. To input the name it’s necessary to use the “right” and “left”
keys to select the type to modify, while it’s possible to use “up” and
“down” keys to change it.
Pressing the “up” key, the sequence of the type is the following:
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z a b c d e f g h i j k l m n o p q r s t u v w x
y z “SPACE” 0 1 2 3 4 5 6 7 8 9; then the sequence begin from A again. Naturally, pressing the
“down” key the sliding happen on the contrary.

- kWh+

- kWh-

- kVArh+

- kVArh-

- Water

- Gas

- RPM

Note: With RPM the counter shows the pulses per second. The refresh time is 1 second.

• Set Weights, all ows to set, for each count er, the weight of t he pulse. The
value set is the num ber of pulse for unit of increase of the count er (ex. to
see to increase the counter of one unit each 5 pulse, it’s necessary to set
the value 5).

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11.11) ANALOG OUTPUT (OPTION)

Selecting the analog output voice, the following programming page
appears:

• Out Index, expresses the number of output to select or program, which
are present on the hardware of the instrument.

• Type, all ows to select the value of current output, (disabled, 0-20mA, 4-
20mA).
Through the up & down keys, it may be poss ible to select the type of the
output current, by pressing the “ENTER” key the configuration is saved.

• Measure Code, is the measure (see cap.12) to associate at the analog
output.

• Min., full-scale value of the lo wer l imit of the programmed value (Me asure
Code).
Once the minimum full-scale has been programmed, the instrument
automatically will associate t he minimum current value (0 or 4 mA) at t his
value.

• Max., full-scale value of the upper limit of the programmed value
(Measure Code).
Once the maximum full-scale has been programmed, the instrument
automatically will associate the maximum current value (20 mA) at this
value.

If the minimum end-sc ale value is l ower of maximum end-scale value, the out of current will be di rectly
proportional at variable set, otherwise it will be invers ely proportional. Minimum and maximum can be
negative value.

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11.12) RESET

The Reset page allows to cancel some operation or the complete operation
of the setup system, reset modes are classified in four groups.

RESET MEASURES, reset all values or selected group of measure. In
particular:

• All, reset all of measures (minimum and maximum, energy counter, time
bands).

• Energies, reset total energy counters.

• TimeBands, reset time bands.

• Min/Max, reset minimums and maximums.

Reset Setup, delete all definition in the setup and the instrument come
back to default setup.

Reset Storage, delete all data stored in the memory.
Reset Counter, delete all counters joined at digital inputs.
Reset Max.Demand, delete max demand values.
Reset Hour-Cnt., to delete all hour counters.
Reset Global, reset complete of t he instrument (Setup, measures s tored,

RAM).

11.13) EXIT SETUP

The last voice of the setup menu is “E XIT SETUP”, which allows the operator to leave the ins trument
setup and go back to the “REAL TIME VISUALIZATION PAGES”.
Operator may also exit the setup by pressing simultaneously the “RIGHT & LEFT” button one or more
time depending of the branch in which you are.

12) LIST OF MEASURES

To program the variables in setup for:

- di gi t al outputs (alarm and pulse)

- anal og out puts

it’s necessary to use these codes:

3Ph.V Three-phase voltage
L1N V L1 phase voltage

L2N V L2 phase voltage
L3N V L3 phase voltage

L12 V Voltage between L1 and L2 phases
L23 V Voltage between L2 and L3 phases
L31 V Voltage between L3 and L1 phases

3Ph.I Three-phase current
L1 I L1 phase current

L2 I L2 phase current
L3 I L3 phase current

THDI L1 THD current L1 phase
THDI L2 THD current L2 phase
THDI L3 THD current L3 phase

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3Ph.PF Three-phase power factor
L1 PF L1 phase power factor

L2 PF L2 phase power factor
L3 PF L3 phase power factor

3 Ph.Cos Three-phase CosΦ
L1 Cos L1 phase CosΦ

L2 Cos L2 phase CosΦ
L3 Cos L3 phase CosΦ

3Ph.VA Three-phase apparent power
L1 VA L1 phase apparent power

L2 VA L2 phase apparent power
L3 VA L3 phase apparent power

3Ph.W Three-phase active power
L1 W L1 phase active power

L2 W L2 phase active power
L3 W L3 phase active power

3Ph.VAr Three-phase reactive power
L1 VAr L1 phase reactive power

L2 VAr L2 phase reactive power
L3 VAr L3 phase reactive power

3Ph.Wh+ Three-phase positi ve acti ve energy
3Ph.VArh+ Three-phase inductive reactive energy
3Ph.Wh- Three-phase negati ve acti ve energy
3Ph.Varh- Three-phase capacitive reactive energy

THDV L1 THD voltage L1 phase
THDV L2 THD voltage L2 phase
THDV L3 THD voltage L3 phase

Avg.W Average three-phase active power
Avg.I Average three-phase current
Avg.Var Average three-phase reactive power

Temp. Temperature
L1Avg.I Average current L1 phase

L2Avg.I Average current L2 phase
L3Avg.I Average current L3 phase

Neutr.I Neutral current
Vunb Voltage unbalance

Iunb Current unbalance
KFact1 L1 phase K factor

KFact2 L2 phase K factor
KFact3 L3 phase K factor

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13) PROBLEMS AND SOLUTIONS

If you have a problem setting up or using your instrument, you may be able to solve it yourself.
Before calling your retailer or nearest distributor you should try the suggested actions that are
appropriate to your problem.

Problem

Possible cause

Suggested

The instrument doesn’t turn on.

- The power supply is

disconnected or wrong.

- The internal fuse is interrupted.

- Verify the connection and the

presence of power supply.

- See the chap. cap. 6.1) to
verify and/or to change the

internal fuse.

The display is completely dark
or clear.

- Contrast badly adjusted - Adjust contrast as described
on 9.1)

The instrument doesn’t

communicate with the NRG
software (or other
communication software).

- Communication wires.

- Communication protocol.

- Wiring system and

communication parameters.

- Verify the correct wiring.

- Verify that the communication
protocol of the instrument
coincides with the one used in
the sw.

- Verify the wiring type (RS232
or RS485) and the settings of
the serial port of the instrument.

The instrument communicates

with the PC but the
communication is interrupted.

- Not shielded wires.

- Lack of terminations.

- Use shielded wires.

- Connect terminations as par.

8.4.2) and 8.4.3).

The instrument loses the CODE

or the PASSWORD.

- E2prom lost d ata.

- to try again to input another

time the data lost.

If the problem have not been solved, or for other information not covered in the present manual,
please contact with our Technical Assistance Department.
Before contacting, it is s uggested to collect the maximum information regarding the instal lation, and
mainly the following data:

1. Model and serial number from the label on the top of the instrument housing.

2. Purchase receipt.

3. Description of problem.

4. System configuration (hardware fitted, firm ware release etc.).

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14) EMA SERIAL COMMUNICATION PROTOCOL

The Electrical Multifunction Analyzer EMA series are disposal with two communication standard
protocols:

• ASCII

• MODBUS-RTU

and optional

• PROFIBUS

• TCP/IP Ethernet

The standard communication protoc ol has been optim ised for t he connec tion of the anal ysers with t he
NRG management software, allowing t o use al l the avail able func ti ons (automat ic search of t he unit in
the network, automatic data downloading, etc.).
Even so the NRG software supports the MODBUS protocol.

About all the information of protocols communication to see specific user manual (EMA SERIAL
COMMUNICATION PROTOCOL).

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15) Notes

WARNING: Contrel Elett ronica Srl declines all liability f or any damage to people or property caused by

improper or incorrect use of its products.
Contrel Elettronica Srl reserves the right to change product specifications without prior notice.

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