Contrel EMM-4h Instruction Manual

EMM-4h instruction manual IM442-U v0.7 pag. 1

INSTRUCTION MANUAL

IM442-U v0.7

EMM-4h ELECTRICAL MULTIFUNCTION METER

GENERALITY

These digital multimeters allow to monitor all the electrical parameters
present on a distribution line. The local display of 30 electrical parameters
is carried out by 4 display with red LED guaranteeing a good and
contemporary reading of more measures. A simple front panel completes
the intuitive selection of several electrical parameters, with a great quantity
of information. These instruments, over of the instantaneous measures,
display the maximum peak of the main parameters (maximum peak and
maximum demand). The presence of the serial port communication
EIA485 (option) allows the connection in network of more instruments to
realize centralized measure networks.
These multimeters replace in a unique device, all the functions of
voltmeters, ammeters, energy meters, cosphimeters, wattmeters,
varmeters, frequency meters permitting a great economic saving, a
reduction of dimension and the wiring energy and a simplification in the
purchase and management of the instruments because this is a model
usable at all of need of local measure in the electrical panel, machine, etc.

AVAILABLE MODELS

It’s available only a model for flush mounting for panel.

-EMM-4h basic version in execution for flush mounting DIN 96x96mm

ACCESSORIES AND OPTIONS
accessories

: frontal protection transparent cover

options

: analog output (alternative to digital input option)
digital output
serial output RS485
insulated current inputs
neutral current input
digital input (alternative to analog Output option)

MEASURED PARAMETERS

parameters unit of measurement initial identification

phase and three phase voltages [V-kV] V

L1-N

V

L2-N

V

L3-N

Σ V

L-N

phase to phase and three phase system voltages [V-kV] V

L1-L2

V

L2-L3

V

L3-L1

Σ V

L-L

phase and three phase currents [A-kA] A L1 A

L2

A L3

Σ A
neutral current [A-kA] An
phase and three phase power factors PF L1 PF L2 PF L3

Σ PF
phase and three phase active powers [W-kW-MW] W L1 W

L2

W L3

Σ W
phase and three phase system reactive powers [VAr-kVAr-MVAr] VAr L1 VAr L2 VAr L3

Σ VAr
phase and three-phase system apparent powers [VA-kVA-MVA] VA L1 VA L2 VA L3

Σ VA
frequency [Hz] Hz

L1

temperature [°C] T
three phase system active energy [kWh]

Σ kWh

three phase system reactive energy [kVArh]

Σ kVArh

three phase system apparent energy [kVAh]

Σ kVAh

hour counter [hr] h

average and peak values (maximums):

maximum phase voltages [V-kV] V

L1-N max

V

L2-N max

V

L3-N max

maximum phase currents [A-kA] A L1

max

A

L2 max

A

L3 max

maximum neutral current [A-kA] A

n max

maximum three-phase powers [W-VAr-VA (k-M)]

Σ W

max

Σ VAr

max

Σ VA

max

maximum average phase currents (maximum demand) [A-kA] I

L1 max (avg)

I

L2 max (avg)

I

L3 max (avg)

maximum average neutral current (maximum demand) [A-kA] A

n max (avg)

maximum average three-phase powers (maximum demand) [W-VAr-VA (k-M)]

Σ W

max (avg)

Σ VAr

max (avg)

Σ VA

max (avg)

average phase currents [A-kA] A L1

avg

A

L2 avg

A

L3 avg

average neutral current [A-kA] A

n avg

average three-phase powers [W-VAr-VA (k-M)]

Σ W

avg

Σ VAr

avg

Σ VA

avg

EMM-4h instruction manual IM442-U v0.7 pag. 2

INSTALLATION

WARNING FOR THE USER

Read carefully the instructions/indications contained in this manual before installing and using the instrument.
The instrument described in this manual is intended for use by properly trained staff only.

SAFETY

This instrument has been manufactured and tested in compliance with EN 61010-1standards. In order to maintain these conditions
and to ensure safe operation, the person must comply with the indications and markings contained in the manual. When the
instrument is received, before beginning installation, check that it's O.K. And it has not suffered any damage during transport. When
starting installation make sure that the operating voltage and mains voltage are compatible with the device instructions. The
instrument power supply must not be earthed. Maintenance and/or repair must be carried out only by qualified and authorized
personnel. If there is ever the suspicious that, that there is a lack of safety ,during operation, the instrument must be disconnected
and cautions taken against accidental use.

Operation is no longer safe when: - The instrument doesn't work. / - The measured value are obviously wrong or
unreasonable / - There is clearly visible damage. / - After serious damage incurred during transport. / - After a storage
under unfavourable conditions

CONNECTION

For a correct use of the device, the wiring diagram contained in the present manual, must be respected.
The connections are the same for all models and are subdivided in three groups:

- auxiliary power supply:

On the instrument are available 4 terminals to connect the auxiliary power supply to the instrument:

Vac version Vac/cc version Vac/cc version

Terminals Power Supply Terminals Power Supply Terminals Power Supply

1-2 0-110V = 100-125Vac 50-60Hz
1-3 0-230V = 220-240Vac 50-60Hz
1-4 0-400V = 380-415Vac 50-60Hz

1-3

20-60Vac
24-72Vdc

1-3

85-230Vac
90-250Vdc

It’s possible, for example, to take the auxiliary power supply between phase and neutral, in a 4 wires system, or
phase-phase in a 3 wires system, without neutral or from a VT in a medium voltage application.

- measure voltage inputs:

4 terminals are available for the connection to the 3 phase and neutral of the network of measure, the maximum
voltage phase to phase shouldn't be over 500 V rms.
In case of a 3 phase system without neutral, or non distributed neutral to leave terminal N free.

- measure current inputs:

6 terminals are available for the connection to 3 external amperometric transformers with secondary 5A, it’s possible
to use 2 TA on lines with 3 wires (insertion three phase Aron). The utilization of external TA is obligatory.
With the neutral current input option installed, the multimeter allows the measure of the neutral current, using a current
transformer /5A; the secondary must be connected to the In S1 and S2 terminals available on the rear of the
instrument (see the wiring diagram).

REMARKS: It's a must to respect the phase sequence. The connections between current and voltage phase inputs must not be
inverted (for example, CT placed on phase L1 must correspond to the I1 input). So as it is not correct to invert S1 and S2 terminals,
since power factors and powers might not be reliable.
For fixing the flush mount version instrument to the panel, use the fixing devices supplied, by inserting them in the side groves of the
enclosure and tighten the screws.
For safety reasons, place an external fuse protection at the input voltages, and use adequate cables for the working voltages and
currents, with a cross sections from 0,5 to 2,5 mm

2

.

WIRING DIAGRAMS

extractible

screw

terminals

rear

panel

Pin-out

EMM-4h

(compl ete )

1

3

4

2

!

DI+

DI–

Do1

Do2

C.o

BA

gnd

S1 S2

IN/I∆

RS485

OPTION S:

Ao+

Ao-

I ∆

I

S2

S2

S1

S1

S1

S2

VL1

VL2

VL3

N

I3

I2

I1

CURRENT

INPUTS

VOLTAGE I NPUTS

V. AUX

POWE R SUPPLY

DIGITAL OUTPUTS

CT .. ./1 A

CT .. ./5 A

EMM-4h instruction manual IM442-U v0.7 pag. 3

P1

P2

S1

S2

N

L1

S2

S2

S2

S1

S1

S1

I1

I2

I3

V

L1

V

L2

V

L3

N

0

110

230

400

N.B. it’s better, where possible, to use 3 CT (above all with unbalance loads)

N.B. If the multimeters are us ed on single phase line, the me asure are
referred on the L1 phase. The others datadisplayed relatives at three
phase system are not to consider.

INSERTION ON THREE PHASE LINE WITH 3 WIRES AND 2 CT
(AARON insertion)
(only for INSULATED CURRENT INPUTS option)

P1P1P2

S1S1S2

L1
L2
L3

S2

S2

S2

S1

S1

S1

I1

I2

I3

V

L1

V

L2

V

L3

N

0

110

230

400

EMM

INSERTION ON SINGLE PHASE

P1

S1

N

L1
L2
L3

S2

S2

S2

S1

S1

S1

I1

I2

I3

V

L1

V

L2

V

L3

N

measure c urrent inputs

measure v oltage inputs

0

110

230

400

auxiliary power

supply

INSERTION ON THREE-PHASE BALANCED WITH 3 OR 4 WIRES

EMM

EMM

measure c urrent inp uts

measure vol tage inputs

auxiliary power

supply

measure current inputs

measure voltage inputs

auxiliary power

supply

P1

P1

P1

P2

S1

S1

S1

S2

N

L1
L2
L3

S2

S2

S2

S1

S1

S1

I1

I2

I3

V

L1

V

L2

V

L3

N

measure current inputs

measure voltage inputs

0

110

230

400

auxiliary power

supply

N.B. on line with 3 wires (without neutral or with neutral not supplied) the N
terminaln must not be connected.

INSERTION ON THREE-PHASE LINE WITH 4 WIRES

EMM

imeasure voltage inputs

Voltage insertion with 3 VT

N

L1
L2
L3

V

L1

V

L2

V

L3

N

P1 P2

S1

S2

S2

S1

In

EMM with
internalCT

with Ineutral

option

CT connection to
read the neutral
current

Digital Outputs:
DO1 output if used as PULSE is linked to the
ACTIVE ENERGY counter,
DO2 output if used as PULSE is linked to the
REACTIVE ENERGY counter.
DO1 and DO2 can be used as ALARM and they
can be linked to a measure.

EMM

Digital Outputs

Max 150mA
Max 230Vac/dc

From 80 to 250 Vac
From 90 to 250 Vdc

Digital Input connection

it’s better to put a fuse (50mA 250 V fast)
on the digital input.
The maximum current absorbed is 1 mA.

N.B. on line with 3 wires (without neutral or with neutral not supplied) the N
terminaln must not be connected.

EMM-4h instruction manual IM442-U v0.7 pag. 4

DESCRIPTION FRONT PANEL– OPERATORS

LEGEND:

A: push-button for the visualization of electrical parameters of three-phase system with the corresponding LED

indication. In modality programming (SETUP) it’s used to confirm the parameter set.

B: push-button for the selection of the electrical parameter to be displayed on display F. In modality programming

(SETUP) it’s used to increase the value of the parameters to set.

C: push-button for the selection of the electrical parameter to be displayed on display G. In modality

programming (SETUP) it’s used to reduce the value of the parameters to set.

D: LED bar for the indication of the electrical parameter displayed on display F.
E: LED bar for the indication of the electrical parameter displayed on display G.
F: 3 displays for the visualization of electrical measures of every phase.

When ΣL LED is ON, only the main display will be active showing the three-phase system value of the
electrical measure selected.
LED k and M show the eventual multiplying factor (k = kilo=x 1.000, M =Mega= x 1.000.000)
Using the C key the display indicates also the values of the active and reactive energy counters.
Using the A and B keys the display indicates the maximum and average values.

G: display for the visualization of the electrical measure indicated in LED E (energy counters excluded).

The voltage values are referred to the three-phase system.
The k LED displays the reading in kilo (x 1000).
Using the C key the display indicates the type of the energy displayed.
Using the A and B keys the displays indicate the type of the value: average or maximum.

A+C: when pressing simultaneously the instrument pass to the following menu:

- instrument programming (SETUP)

- energy counters and peak values deleting (RESET)

- digital outputs programming (SET

DO1; SET DO 2)

- analog output programming (SET

AN OUT)

- hour counter programming (HR_)

- I/O diagnostic page

A+B: when pressing simultaneously the instrument pass to the visualization of average and maximum values

stored.

MENU OF INSTRUMENT PROGRAMMING (SETUP)

To enter in SETUP it’s necessary to press at the same time A and C keys, on the F display will appear the message

SeTUp. Pressing the A key on the G display will appear the message SET that will remain always displayed during

the set of each parameter to highlight the setup phase in running.
The set values will be keep also in absence of auxiliary power supply.

B

C

E

F

A

G

D

M

L1

L2

L3

k

k

kWh

kVArh

...h

max

avg

V

A

P. F.

W

VAr

VA

V

L-N

L-L

V

L-N

Hz

°C

V

L-L

A

-N

Σ

L

EMM-4h

electrical

multi meter

888
888

888

888

EMM-4h instruction manual IM442-U v0.7 pag. 5

SET GENERAL PARAMETER (SET UP)

Entry to menu: seT UP Æ seT Up

RESET
SET DO1
SET DO2
SET AN OUT
SET HR_
DO_ OFF OFF

SET CT Increase
Set CT ratio

from 1 to 2000 Decrease
SET VT Increase

Set VT ratio

from 0.1 to 400.0 Decrease

(version with A

n

input) SET CTN Increase

Set CT ratio of the neutral

input from 1 a 2000 Decrease

seT AV9 T Increase
Set average time

from 1 to 30 minutes Decrease
seT EN TB1 TB2

Set Energy visualization TOT PAR

type NORMAL
seT 3pH BALANC

Set connection UN_BAL

type 1PH L1
seT MDE -3-

Set wiring connection

type -4-
seT SYN MDE L1

Set synchronism 50

type 60
(version with digital output) seT PUL SE 10.0 kW-kVAr / pulse

Set pulse weight 01.0 kW-kVAr / pulse

0.10 kW-kVAr / pulse

0.01 kW-kVAr / pulse
(version with digital output) seT TPL Increase

from 100 to 500 mS

in step by 100 mS Decrease

(version with serial output) seT ID ADR Increase

Set address of network

from 001 to 247 Decrease

seT SER BDR

Set baud rate 19200 baud 19.2

serial interface 9600 baud 9.60

(version

with serial output) 4800 baud 4.80

2400 baud 2.40
seT PAR

Set parameters of bit: 8data 1stop-no parity 8.1 paR NO

Communication bit: 8data 2stop-no parity 8.2 paR NO
serial interface bit: 8data 1stop-even parity 8.1 paR EVE
(version with serial output) bit: 8data 1stop-odd parity 8.1 paR ODD

SET PAS Increase

Set Password

OFF - 0002 ÷ 9999 Decrease

Confirm and end of general settings

EMM-4h instruction manual IM442-U v0.7 pag. 6

Programming of the transformation ratio of the external current transformers (SET CT)

The programming of the CT ratio, intended as the ratio between the primary and the secondary circuit (example: with
CT 1000/5 it must be set 200), has to be performed by using the front keys.

After the enter in the setup (message SETUP on F display) pressing the C key, the message seT will appear on the
G display and the message CT (Current transformer ratio) on the first F display; the transformation ratio value (set to

1 by the manufacturer) on the second and the third F display. Press B or C keys to increase or decrease the value
respectively (the variation is performed unit by unit). In order to speed up the operation, keep the B or C key pressed,
the variation will be performed by tens and hundreds. To increase or decrease the value by unit, it is necessary to
release and to press the button again. To confirm the set value, press the A button; in this way it is possible to enter
the next programming. If none key is pressed for 10 seconds, the instrument will automatically leave the programming
menu and the eventual setting SHALL NOT be stored.

- Programming of the transformation ratio of the external voltage transformers (SET VT)

After the precedent programming phase, on F display will appear the inscription Vt (voltage transformer) and the

value of the transformation rate of the external TV (set to 1 from the constructor), considered as the rate between
primary and secondary (example with TV 15/0.1 kV the value will be 150). In the same way at the programming of the
CT rate will be possible to set this value. If the external TV are not used the value to set will be 1. To confirm the value
press the A button.

If the instrument has not options the programming continues with the set of average time AVG T’ and after with the
password PASS, then it come back at the first page SETUP. The presence or the absence of the options, neutral

current, digital output and serial output, will allow the visualization or not of the other settings.

Programming of the transformation ratio of the current transformer for the neutral current input (CTN)

(version with neutral current input)

This setting is active only for the models with this option installed; the message SET will appear on G display; the
message CTN (Current transformer neutral ratio) and the set value on the F display. In the same way at the

programming of the CT rate will be possible to set this value (example with CT 1000/5the value will be 200).
Pressing the A key, confirm and go away with the next setting.

Programming of the average time (seT AVG T’)

After the programming phase previously described, pressing another time the A key, on the F display will appear the

message AVG T’ and the average time settable from 1 to 30 minutes.

To increase the value press the B key. To decrease it, press the C key. To confirm it press the A key.
The average time is the time used to calculate the average parameters (avg) and the maximum demand (maxD).

Programming of the energy visualization type and the use of the digital input (seT EN)

This setting allows to define the energy visualization type after the visualization of the temperature.

With TB1 TB2 will have the separated visualization of the two bands of the active, reactive, and apparent energy; the
digital input will select the band (tb1 if opened, tb2 if closed). The TB1 TB2 function is not present if the digital input
option is not installed. With TOT PAR will have the visualization of the partial and total energy counters; the digital
input is used (when it’s closed) to reset the partial counters. With NORMAL there will be only the visualization of total
counters (that it’s possible to reset from RESET menu). The status of the digital input is always readable from serial.

Programming insertion mode (3PH)

In a unbalance three phase system it’s necessary to set UN_BAL (unbalance) while in a balance system (only one CT
and only one VT) the correct set is BALANC (balance). For a single phase insertion it’s necessary to set 1PH L1.

Programming wiring connection mode (MDE)

This setting allows to definite the wiring type connection. It’s possible to chose 3 wires or 4 wires. With the 4 wires
connection the neutral parameter are displayed and enabled to use for the digital and analog outputs settings.

Programming of the synchronism type (SYN MDE)

In this setting for the synchronization type, it’s possible to choose L1 to use the external frequency (on L1 phase) or
50, 60 Hz to use the internal clock.

Programming of the weight of the active and reactive energy pulse (seT PULSE) (only for vers. with digital output)

After the above mentioned programming, by pressing the A key again, the message PUlse will appear on the F
display and the value of the weight of one pulse settable on three phase values: 0,01 - 0,1 - 1 - 10 kWh or kVArh

(for each emitted pulse the instrument will have counted 0,01 - 0,1 - 1 - 10 kWh o kVArh).
Press the B key to increase the value or C key to decrease the value and A to confirm.

Programming of the duration pulse (SET TPL) (only for vers. with digital output)

The message TPL will appear together the value of the duration pulse expressed in mS. It’s possible to select the

value from 100 mS to 500 mS, with 100 ms steps by using B key (to increase the value) and C (to decrease the
value). Confirm the value pressing the A key.
This setting is used by all digital outputs.

EMM-4h instruction manual IM442-U v0.7 pag. 7

Programming of the address for the communication network (SET ID ADR) (only for vers. with serial output)

After the confirm with the A key of the previous value, the message ID aDR will appear on F display; to set the value

that will identify the instrument when it will be connected in a EIA485 communication network, proceed with the
modality, already described. The settable values are from 1 to 247. To confirm, press the A key.

Programming of the baud rate (SET BDR) (only for vers. with serial output)

The

following setting is the baud rate. The message SET appears on G display, the message SET BDR on the first

two parts of F display to indicate the programming of the baud rate displayed on the third part (L3) of the F display. To
modify the value set, it’s necessary to use the C key to decrease and B to increase the rate. The values settable are:

- 19.2 => 19200 baud

- 9.60 => 9600 baud

- 4.80 => 4800 baud

- 2.40 => 2400 baud

Press A to confirm the value displayed.

Programming of the serial parameters (only for vers. with serial output)

On G display will appear the message SET. The following message will appear on F display using the B and C keys.

To confirm press the A key.

8 1 8 data bit / 1 stop bit
PAR No parity
NO

8 2 8 data bit / 2 stop bit
PAR No parity
NO

8 1 8 data bit / 1 stop bit
PAR Even parity
EVE

8 1 8 data bit / 1 stop bit
PAR Odd parity
ODD

Programming of the Password (SET PAS)

The instrument is supplied without password. When a password (from 0002 to 9999) is set, using the B (to increase),
C (to decrease) and A (to confirm) keys, only who know this value can to enter in the setup. The password, in fact, is

required all the time that someone try to enter in the setup (pressing the A and B key at the same time). If the

password is wrong, the message PASS ERR will appear on F display and the instrument go back to the measures

visualization. To input the password, when required by the instrument, at the enter of the setup, use the A, B and C
keys as the same way done previously.

The menu is cyclic. After the last setting, the instrument go back to the first page of Setup (SETUP). It’s always
possible to come back to measures visualization mode pressing at the same time the A and C keys.

PEAK VALUES AND ENERGY COUNTERS RESET (RESET)

From the measures visualization mode, pressing the A and C keys simultaneously the message SETUP will appear
on F display, press the key C until the message RESET appears on the same display. To accede to the menu, press

the A key. Now it’s possible to select the enabling of cancellation type, by pressing the C key, according with following
types:

RESET PEA: all maximum value will be delete.
RESET AVG: all average and average maximum value (maximum demand) will be delete.
RESET EN: with NORMAL as energy mode (EN) the total energy counters will be delete, with TOT PAR the

partial energy counters will be delete (as when the digital input is closed) and with TB1 TB2 the band

counters will be delete.

RESET ALL: to delete average maximum values and energy counters.

Entry to menu:

seT UP Æ seT Up

RESET

SET DO1
SET DO2
SET AN OUT
SET HR_

--- OFF OFF (the visualization depends on the settings and the I/O status)
RESET PEA NO / YES Confirm Reset

Deleting maximum values (max)

RESET AVG NO / YES Confirm Reset

Deleting average values (avg)
and maximum demand (maxD)

RESET EN NO / YES Confirm Reset

Deleting energy counters

RESET ALL NO / YES Confirm Reset

Deleting maximum and average
values, and energy counters

To enable the chosen type, press the B key to change the indication on display G from NO to yes.
Confirm enabling cancellation, by pressing the A key. The indication on display G change from yes to ---.

EMM-4h instruction manual IM442-U v0.7 pag. 8

PROGRAMMING OF THE DIGITAL OUTPUT (SET DO1 SET DO2)

The DO1 and DO2 digital outputs have three modality of functioning: PULSE, alarm (ALR) and REMOTE command.
The DO1 modality setting is independent from DO2. For example it’s possible to set DO1 on PULSE (pulse emission)
and DO2 on alarm mode (ALR).

In the menu SET DO1 and SET DO2 it’s possible to program the function of all digital outputs. In these menus are
available the following modality: PULSE, ALR and REMOTE.
In PULSE mode the digital output DO1 will emit pulses proportional to the active energy counted while the digital

output DO2 will emit pulses proportional to the reactive energy counted. The proportionality will depend from the

PULSE set in the SETUP and the duration of the impulse is set in the TPL voice of the SETUP.
The ALR modality is divided in two parts: ALR SYS 3PH and ALR SYS 123. With ALR SYS 3PH the digital
output will function as alarm verifying that the three phase value doesn’t exceed the threshold set (ALR HI and ALR
LO). With ALR SYS 123 the digital output will function as alarm verifying that the maximum value of the single
phases doesn’t exceed the maximum threshold set (ALR HI) and that the minimum value of the single phases
doesn’t come down the minimum threshold set (ALR LO). The activation of the alarm output will come after some
seconds of delay set(ALR DL).
In the REMOTE mode, the output status will be decided from the status of the correspondent MODBUS register (see

protocol modbus manual for EMM).
Enter to menu:

seT UP Æ seT Up

RESET

SET DO1
SET DO2
SET AN OUT
SET HR_

--- OFF OFF (the visualization depends on the settings and the I/O status)
Pul se To choose the output modality

ALR SYS 3PH (selecting PULSE or
ALR PH_ 123 BY_ REMOTE
BY_ REMOTE the setting finish)

ALR SEl VLN
ALR SEl AMP
ALR SEl AN (only for ALR SYS 3PH)
ALR SEl P.f To chose the parameter
ALR SEl ACT to control
ALR SEl REA (see variable list)
ALR SEl APP
ALR SEl VLL
ALR SEL FRE (only for ALR SYS 3PH)
Alr sel T°c (only for ALR SYS 3PH)

Set maximum alarm threshold Increase

ALR HI Decrease (after 0 there is OFF)

Set minimum alarm threshold Increase

ALR LO Decrease (after 0 there is OFF)

Set delay Increase

ALR Dl Decrease

Confirm and end of digital output settings.

EMM-4h instruction manual IM442-U v0.7 pag. 9

ENTER IN THE SETUP

From the measures visualization, press at the same time the A and C keys, the message SeT Up will appear on the

F displays.
CHOOSE THE DIGITAL OUTPUT TO PROGRAM

Press repeatedly the C key until the message SET DO1 (DO1 output) or SET DO2 (DO2 output) appears on the F

display. Press the A key to select this setting.
SELECT THE MODALITY OF FUNCTIONING OF THE DIGITAL OUTPUT

To select the functioning mode, using the B and C keys, it’s possible to select: PULSE (pulse emission), ALR SYS

3PH, (alarm on three phase value), ALR PH_ 123 (alarm on minimum and maximum single phase value) and
BY_ REMOTE (the digital output is managed using serial output). Press A key to confirm.

CHOOSE THE PARAMETER TO LINK TO THE DIGITAL OUTPUT
With an alarm modality set, it’s necessary to select the parameters associated to the alarm output; by pressing the B
and C keys until the parameter choice appears on the third part (L3) of F display and the glowing the corresponding
led on the D bar. Press A key to confirm the set.
SET THE HIGH AND THE LOW THRESHOLDS

On F display will appear the message ALR Hi with the high threshold value; confirming with the A key on the same
display will appear the message ALR LO with low threshold value. The B (to increase) and C (to decrease) keys are

used to set the high and the low thresholds values. The range depends by the parameter and it is linked to the CT and
VT ratios. Pressing A key to confirm.
The threshold set is linked with CT and VT ratios, for this reason it’s necessary to make this operation after the
programming of the CT and VT. The end scale value must be confirmed when CT and VT ratios are modified.
The low threshold will be lower than high threshold. If the high threshold is set as OFF the low threshold will have the
range of the high threshold.
SET THE DELAY TO THE DIGITAL OUTPUT ACTIVATION
Now it’s possible to set the delay that will pass between the alarm condition set and the activation of digital output. On

F display will appear ALR DLY and the value expressed in seconds (range 1÷900). The modification of the value is

done in the same way of the threshold set. With the confirmation (A key) the set is complete.

The programming will be referred to the digital output indicated on G display (DO1 o DO2).

EMM-4h instruction manual IM442-U v0.7 pag. 10

PROGRAMMING ANALOG OUTPUT (SET AN OUT)

Note: This menu is active only if the instrument has this option.

The connection of the analog output is on AO+ and AO- terminals that replace the DI+ and DI- terminals when this
option is installed.
The maximum resistance of the load connected to the analog output is 400 ohm.
The analog output will supply a signal from 0 to 20 mA or from 4 to 20 mA (depending of the set) proportional to the
measure of the parameter selected and the and-scale set.
The analog output refresh time is linked to the display refresh time.
Enter to menu:

seT UP Æ seT Up

RESET

SET DO1
SET DO2
SET AN OUT
SET HR_

--- 0FF oFF (the visualization depends on the settings and the I/O status)
AN SEl VLN

AN SEl AMP
AN SEl AN
AN SEl P.f To chose the parameter
AN SEl ACT (see variable list)
AN SEl REA
AN SEl APP
AN SEl VLL
AN SEL FRE
AN sel T°c

Set high threshold Increase

AN HI Decrease

Set low threshold Increase

AN LO Decrease
Select analog output AN 0-20

values

AN 4-20

Confirm and end analog output settings.

SELECT THE PARAMETER TO LINK TO THE ANALOG OUTPUT

After the digital outputs menu (SET DO1 and SET DO2), pressing the C key the message SET AN OUT will
appear on the F display. To accede to the menu programming press the A key, the message SET will appear on the

G display, on the F display and on D led bar will appear the parameter to link to the analog output and selectable
pressing more time the B key. Pressing the A key to confirm the parameter selected.
SET THE HIGH AND THE LOW THRESHOLD
Now, it’s necessary to set the end scale value (high limit) that will appear on F display preceded from the message

AN HI. As in the previous setting this value is modifiable with B and C keys. The k or M led mean respectively x10

3

or x10

6

. Confirming with A key.
The threshold set is linked with CT and VT ratios, for this reason it’s necessary to make this operation after the
programming of the CT and VT. The end scale value must be confirmed when CT and VT ratios are modified.

Note: The P.F. scale is fixed from P.F. -0 capacitive (20mA) to +0 inductive (0mA); with P.F. 1 will have 10mA (0-20
scale), 12 mA (4-20mA scale).

At the same way of the high threshold setting, it’s necessary to set the low threshold. The value must be lower then
the maximum threshold.
SET THE LIMIT VALUES OF THE ANALOG OUTPUT

After the confirmation of the end scale on F display will be displayed the message AN with the limit values of the
analog output: 0-20 or 4-20 selectable with the B and C keys. Confirm with A key.

EMM-4h instruction manual IM442-U v0.7 pag. 11

PROGRAMMING OF THE HOURS COUNTER (SET HR_)

The hour counter will be increased when the measure of the parameter will exceed the set threshold value.

seT UP Æ seT Up

RESET

SET DO1
SET DO2
SET AN OUT
SET HR_

--- OFF OFF (the visualization depends on the settings and the I/O status)
HR_ SEl VLN

HR_ SEl AMP
HR_ SEl AN
HR_ SEl P.f To chose the parameter
HR_ SEl ACT (see the variable list)
HR_ SEl REA
HR_ SEl APP
HR_ SEl VLL
HR_ SEL FRE
HR_ sel T°c

Set the threshold Increase

HR_ HI Decrease

Confirm and end of hour counter settings.

SELECT THE PARAMETER TO LINK TO THE HOURS COUNTER

From the previous setting, pressing the C key it’s possible to set the hours counter: the message SET HR_ appears

on the F display. Press the A key to define the parameter to link to the hours counter. Press more time the B key to
select the parameter and the A key to confirm it.
SET THE THRESHOLD
Subsequently it’s necessary to set the threshold using the B (to increase) and C (to decrease) keys. Confirm with A
key.

I/O INFO PAGE

After the hour counter set, the I/O info page appears in F displays: on the first part (L1) the status of digital input, on
the second part (L2) the status of the first digital output (DO1), on the third part (L3) the status of the second digital
output (DO2).
The visualization of the digital input status (activated that is supplied and deactivated that is not supplied) depends of

the type of energy visualization: NORMAL, TOT PAR e TB1 TB2. With NORMAL the digital input will be
indicated with ON (activated) or OFF (deactivated). With TOT PAR the visualization will be --- (deactivated) or
RES (activated) to indicate the partial counter RESET execution. With TB1 TB2 will be visualized B1_ (input
deactivated) or B2_ (input activated) to indicate the band active.
The status of the two digital outputs is ON if the digital output is activated or OFF if deactivated.

The status of the serial port appear on the G display when the instrument has this option. If the instrument receives

data, it displays the letter R and the number of the instrument that is in communication while if the instrument
transmits data, it displays the letter T.

VARIABLE LIST

VLN three-phase voltage
AMP three-phase current
AN neutral current
P.F three-phase power factor
ACT active power
REA reactive power
APP apparent power
VLL phase to phase voltage
FRE frequency
T°C temperature

EMM-4h instruction manual IM442-U v0.7 pag. 12

MEASURES VISUALIZATION

The instrument is divided in two distinct section:
the first is composed by three displays (F), by A and B keys and by
LED bar D; the second (in the low part) is composed by G display,
by C key and by LED bar E.
The two sections are to consider as two different instruments in a
only one box, in fact it’s possible to act in a zone without to modify
the visualization in the other (peak value and energy counters
visualization excluded).

Visualization section 1

The three measures of phases (on L1, L2 and L3), of the parameter
indicated from the led D on, appears on F display. For the measure
of the phase to phase voltages (V

L-L), the three measures are V

L1-L2

, V

L2-L3

, V

L3-L1

.
It’s necessary to press the B button to select the parameter that can be displayed and indicated from D LED.
Press A button to see on F display the three phase value (the average of the single phase of voltage, current, power
factor and the sum of single phase for the power) of the parameter selected,: the led inside the A key is on.
To press another time the same key the visualization come back at the phase values.
The unit of measurement can be expressed in kilo or Mega, in the this case the relative LED is on.

A sign – on the first digit indicates the visualization of the capacitive power factor (example the reading -.95 indicates
a power factor of 0.95 capacitive)
Note: If in the Setup the single phase mode (1PH L1) is set, all the measures appear on the L1 display.

Visualization section 2
At the same way of the section 1, press the C button to select the parameter that can be displayed and indicated from
E LED. The voltage values are of the three phase system, the frequency is of the L1 channel.

Visualization energy and hours counters

With the C key it’s possible to visualize on F display the active, reactive and apparent energy counters. One segment
of the right digit of the G display, in correspondence of the kWh and KVArh on the front panel, turn on, to indicate the
visualization of the active and reactive energy counters. The led VA and the segment of the right digit of the G display,
in correspondence of …h on the front panel, turn on, to indicate the visualization of the apparent energy counter. To
complete the visualization the led k over the F display could be on.

This is the visualization if NORMAL is the set in EN voice of the setup. Instead if the setting is TOT PAR on the F

display will be visualized alternatively the partial and the total active, reactive and apparent energy counters; the first

digit of the G display indicates the type of the counter: P for the partial (the user could be reset it) and T for the total
(it’s no possible to reset it). If the setting is TB1 TB2 on F display will be visualized alternatively of the counters of the
band 1 (B1 on the first two digit of G display) and of the band 2 (B1 on the first two digit of G display).

The right digit of G display, in correspondence of the …h, turn on, when the visualization of hours counters is active.

The reading of the counters use the 9 digits (maximum reading 99999999.9) of the F display: the measure is
displayed in the way that the L1 display will indicate the first 3 digits, the display L2 the seconds 3 digits and the L3
display the last 3.
For example if: L1=000, L2=028, L3=53.2 the reading is 2853.2 kWh.

section 1

section 2

M

L1

L2

L3

k

k

kWh

kVArh

...h

max

maxD

avg

max
avg

V

A

P.F.

W

VA r

VA

V

L-N

L-L

V

L-N

Hz

°C

V

L-L

alarm

A

-N

ΣL

EMM-4h

electrical

multi meter

888
888
888

888

EMM-4h instruction manual IM442-U v0.7 pag. 13

VISUALIZATION PEAK AND AVERAGE VALUES

Pressing at the same time the A and B keys, on F display will appear the
average and maximum stored value, that are selected using the B key while
a luminous segment on the G display indicates the type of the maximum
and/or average value.

AVG: the average values are calculated on a average time set. The
calculation is at fixed window and it’s sinchronized when the instrument turn
on.

The stored maximum values are the two types:
MAX: the instantaneous maximum values store the maximum value
achieved by the parameter of measure for at least one second.

MAX AVG: the average maximum values (maximum demand) store the
maximum value achieved in the average time as set in the setup menu;

The integration for the calculating of the average values is synchronized all the time that the instrument turn on.
Press A and B keys another time to come back to the measures visualization. The instrument will come back to the
measure visualization automatically if for 10 seconds no one button is pressed.
The average value, the maximum value and the maximum average value selectable with B key are the following:

parameter Identifications / description G display

V

L1-N max

V

L2-N max

V

L3-N max

phase voltages

maximum instantaneous phase voltages

max

maxD

avg

I

L1 max

I

L2 max

I

L3 max

I

N max

phase and neutral currents

maximum instantaneous phase currents

max

maxD

avg

Σ W

max

Σ VAr

max

Σ VA

max

three-phase power

maximum three phase powers (Σ)

max

maxD

avg

I

L1 max avg

I

L2 max avg

I

L3 max avg

I

N max avg

phase and neutral currents

maximum of average phase and neutral currents (max. demand)

max

maxD

avg

Σ W

max avg

Σ VAr

max avg

Σ VA

max avg

three-phase power

maximum of average three phase powers (maximum demand)

max

maxD

avg

I

L1 avg

I

L2 avg

I

L3 avg

I

N avg

phase and neutral currents

average phase and neutral currents

max

maxD

avg

Σ W

avg

Σ Var

avg

Σ VA

avg

three-phase power

average three phase powers

max

maxD

avg

NOTE relative to the measure

The refresh time of the display is lower of a second and it depends by the time of calculating of the measure and concerning the
methodology of measure used in the way to allow a comfortable reading of value also in presence of fast variation of the measure
parameter.
If the multimeters are used on single phase lines, the measures are referred at the phase L3. The other data displayed and relative
to the three-phase system must not considered.
If the measure indicated by the instrument are not reliable or absurd it’s necessary to verify the connection of the measure inputs of
currents and voltages because must be respected the sequence of the phase, the corresponding of the currents and voltages of the
same phase (the L1 voltage phase and the TA located on L1 phase must be connected on the L1 input) and the sense of the
current (the S1 terminals of the TA must be connected at the S1 terminals of the instrument).
In some application where the secondary is connected to other instruments apart from the EMM multimeter, some problems could
happen concerning the typology of the amperometric inputs.
If there are some problem call the assistance service.

B

C

D

E

F

A

G

M

L1

L2

L3

k

k

kWh

kVArh

...h

max
avg

V

A

P. F.

W

VAr

VA

V

L-N

L-L

V

L-N

Hz °C

V

L-L

A

-N

Σ

L

EMM-4h

electrical

multi meter

EMM-4h instruction manual IM442-U v0.7 pag. 14

SERIAL LINE CONNECTIONS

As shown in the diagram, it is necessary to place a serial RS232/485 converter between the RS232 PC's outlet and
the EMM instrument/s.
In serial line over 500 mt, it’s necessary to insert a line termination resistance (Rt=100÷120 ohm) between the twisted
pair of cables, placing it between the converter and the end of the network (last instrument connected). With a
shielded cable it’s necessary to connect the shield to earth. Use always twisted cables with minimum section of
0,36mm

2

(22AWG) and lower capacity of 60 pF/m (i.e.: BELDEN cable type EIA RS485-Ref.3105A).
Should it be the case of long distance networks, ambiences where there have been placed energy transporting cables
or ambiences subject to be electrically disturbed, it is suggested to use 100÷120ohm 1/2W resistors, placed between
the common of the RS485 outlet and the shielded cable.
For other information on the serial line it’s better to see the manual of EMI1 serial converter.

EIA485 INTERFACE COMUNICATION (RS485)

It is possible to exchange information between the instrument and a PC, PLC or other compatible system, through the
asynchronous serial line RS485.
The interface EIA485 allows a multi-drop connection, in order to connect various instruments in the same network.
The maximum suggested length for a RS485 connection is 1200m.
For longer distances provide the use of low attenuation cables or signal amplifiers.
On the same RS485 it is possible to install up to 32 units, beyond this number of units it is required to place a signal
repeater, each one of them will be able to manage up to 32 instruments.
The higher is the number of connected instruments on the same serial line, the lower will be their response speed.

RS485/232 converter

RS485/232 converter

Max 32 EMM; max 300 meters

Max 32 EMM; max 1200 meters

R=120

Ω

A

1

B1

A

2

B2

serial converter EMI1

C1

R1*

R2*

C2

LINE 1

LINE 2

]
]

RS232

RS485

R=120

Ω

A1

B1

A2

B2

serial converter EMI1

C1

R1*

R2*

C2

LINE 1

LINE 2

]
]

RS232

RS485

CONNECTION WITH NOT SHIELDED CABLE

CONNECTION WITH SHIELD ED CABLE

EMM-4h instruction manual IM442-U v0.7 pag. 15

DIMENSIONS

96

96

81

14

9

90

92

92

R3

cut out panel

flush mounting for
panel
DIN 43700

M

L1

L2

L3

k

k

kWh

kVArh

...h

max

avg

V

A

P.F .

W

VAr

VA

V

L-N

L-L

V

L-N

Hz°CV

L-L

A

-N

Σ

L

EMM-4h

electrical

multi meter

EMM-4h instruction manual IM442-U v0.7 pag. 16

TECHNICAL FEATURES

MEASURES, PRECISIONS
voltage true RMS of the phase voltages and the phase to phase voltages and values of three phase system

range of total measure: 20÷500V trms phase-phase - 290V rms phase-neutral
visualization (0,02÷50,0kV) - measure precision: ±0,5% ±1 digit– management maximum values

current true RMS of the phase currents and of the value of three phase system

range of measure: 0,02÷5A trms - measure precision: ±0,5% ±1 digit
visualization 0,02÷9990A

frequency frequency of the L1 phase –range of measure: 40÷500Hz

precision: ±0,5% ±1 digit

powers phase and three phase system apparent, reactive and active power

range of measure: 0,001÷9990kW - 0,001÷9990kVAr - 0,001÷9990kVA
precision: ±1% ±1 digit

power factor phase and three phase power factor

range of measure: -0,1÷0,1 / precision: ±1% ±1 digit

energy measure three phase system apparent, active and reactive energy

range of measure: 0÷99999999,9 kWh / kVArh class 2 ( IEC 1036)
precision: ±1

hours counters precision: ±1%; risolution 1/10 of hour
AUXILIARY POWER SUPPLY, INPUTS

auxiliary power
supply

Version Vac: 100-125V / 220-240V / 380-415V ±10% - frequency 50-60Hz
Version Vca/dc: 20-60Vac – 24-72Vdc
Version Vca/dc: 80-230Vac – 90-250Vdc
consumption max 4VA

voltage inputs

from 20 to 500V phase-phase; permanent overload +20% - input impedance: 1 MΩ
insertion on three phase line with 3 wires, 4 wires and single phase
insertion in MT with external TV and transforming rate programmable from 1 to 400

current inputs from 0,02 to 5A; permanent overload 30% - from external TA with secondary 5A,

primary programmable from 5 to 10000A - auto-consumption <0,5VA

INPUTS / OUTPUTS
digital outputs Two outputs with common, optomos 12÷230Vac/dc, max 150mA,

insulation: 3kV for 60 seconds
Pulse Function:
Weight programmable 0,01-0,1-1-10 kWh/pulse
Pulse duration 100-200-300 400 500 milliseconds selectable
DO1: active energy pulse output (accumulated Tb1+Tb2)
DO2: reactive energy pulse output (accumulated Tb1+Tb2)

digital Input Changing time band function or reset partial counters

Opto-isolated input:
Insulation: 2500 Vrms 60 seconds
Impedance: 440 kohm
OFF voltage range (Tb1 selected) - 0 a 20 V ca/cc
ON voltage range (Tb2 selected or reset partial counters): - From 80 Vac to 250 Vac, 50/60Hz

- From 90 Vdc to 300Vcc, polarised.

analog output

Max load: 400Ω
Range 0-20mA; 4-20mA
Insulation: 3kV for 60 Seconds

serial output One optional output RS485, baud rate selectable, MODBUS-RTU protocol

insulation: 3kV for 60 seconds

GENERAL
display, operators 4 displays with red LED 10mm everyone of 3 digit by 7 segments

3 push-button for selecting measure and programming

mechanic protection degree: IP52 frontal - IP20 enclosure and terminals - weight: about 0,5 kg

connections with screw terminals for cable 2,5 mm

2

enclosure thermoplastic self-extinguishing - flush mounting DIN 96x96mm, depth 95mm

environmental working temperature: -10÷60°C; humidity <90%

storing temperature: -25÷70°C
insulation test: 3 kV for 1 minute

standards EN 50081-2; EN 61000-6-2

EN 61036-1; EN 61010-1

NOTE
At reason of the evolution of standards and products, the company reserves to modify in every time the features of the product described in this
document, that it’s necessary to verify preventively.
The liability of the producer for damage caused by defect of the product ”can be reduced or deleted (…) when the damage is caused joint by a
defect of product or for blame of the damaged or a person of which the damaged is responsible” (Article 8, 85/374/CEE).