elco ELM-961 User manual

ELM-961 instruction manual IM441-U v0.6 pag. 1
INSTRUCTION
MANUAL
IM441-U v0.6
ELM-961 ELECTRICAL MULTIFUNCTION METER
GENERALITY
These digital multimeters series 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.
OPTIONS
- internal CT
- digital output (in alternative to the serial port)
- serial port (in alternative to the digital output)
- power supply different from standard version
- current input 1A
MEASURED
PARAMETERS
p a rameters unit of measuremen t initial id en tificatio n
phase and three phase voltages [V-kV] V L1-N V L2-N V L3-N ΣV L-N
phase to phase and three phase system voltages [V-kV] V L1-L2 V L2-L3 V L3-L1 ΣV L-L
phase and three phase currents [A-kA] A L1 A L2 A L3 ΣA
phase and three phase power factors PF L1 PF L2 PF L3 ΣPF
phase and three phase active powers [W-kW-MW] W L1 W L2 W L3 ΣW
phase and three phase system reactive powers [VAr-kVAr-MVAr] VAr L1 VAr L2 VAr L3 ΣVAr
phase and three-phase system apparent powers [VA-kVA-MVA] VA L1 VA L2 VA L3 ΣVA
frequency [Hz] Hz L3
temperature [°C] T
three phase system active energy [kWh] ΣkWh
three phase system reactive energy [kVArh] ΣkVArh
three phase system apparent energy [kVAh] ΣkVAh
hours counter [hr] h
peak value (maximu ms):
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 three-phase powers [W-VAr-VA (k-M)] ΣW max ΣVAr max ΣVA max
maximum average phase currents (maximum demand) [A-kA] I L1 max (avg) I L2 max (avg) I L3 max (avg)
maximum average three-phase powers (maximum demand) [W-VAr-VA (k-M)] ΣW max (avg) ΣVAr max (avg) ΣVA m x (avg)
a
average phase currents [A-kA] A L1 avg A L2 avg A L3 avg
average three-phase powers [W-VAr-VA (k-M)] ΣW avg ΣVAr avg ΣVA avg

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 unde r
unfavourable conditions
CONNECTION
For a correct use of the device, the wiring diagram contained in the present manual, must be respected.
The connections are available on the screw terminal:
- auxiliary power supply :
The power supply is take from voltage inputs.
Are available 3 different auxiliary supply:
0 - 115V = 100-130V 50-60Hz (N-L3) (on request)
0 - 230V = 220-240V 50-60Hz (N-L3) (on request)
0 - 400V = 380-415V 50-60Hz (L2-L3) (standard model)
It’s possible, for example, to give an 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.
In the standard
version the voltage is 400V and it’s taken between the phases L2-L3.
In the following table it’s possible to see the measurable voltage depending of the type of power supply.
power supply
terminals rated v o ltage range of measurable v o ltage
400V 300÷500V phase to phase (175÷290V phase-neutral)
230V 175÷290V phase to phase (130÷170V phase-neutral)
L2-L3 (phase to phase power supply)
110V 85÷145V phase to phase (50÷85V phase-neutral)
230V 300÷500V phase to phase (175÷290V phase-neutral)
L3-N (phase – neutral power supply) 110V 175÷290V phase to phase (100÷170V phase-neutral)
The standard version allows to apply the instrument at all the three-phase network 400V with or without neutral supplied.
ELM-961 instruction manual IM441-U v0.6 pag. 2
For example for application on single phase 230V will need the L3-N / 230V. while for applications in medium voltage (for
example using external voltage transformer 15 / 0.1 kV phase to phase) will need the version L2-L3 / 110V.
- 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 and
dependent to the auxiliary power supply. In
case of a 3 phase system without neutral, or
non distributed neutral to leave terminal N
ELM- 961
REAR PANNEL
free. It’s possible to use external voltage
transformer in fact the transformation rate of
the external transducer can be set in the
SETUP of the instrument and the
visualization allows the reading of voltage up
to 40,0 kV.
- measure current inputs:
4 terminals are available for the connection to
ENERGY COUNTERS
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. The transformation rate of the external transducer can be set in
the SETUP of the instrument and the visualization allows the reading of voltage up to 9,99 kA.
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 mm2.

ELM-961 instruction manual IM441-U v0.6 pag. 3
measure cu inpu
ts
rre nt
I2 S1
measure curre nt inpu
ts
m ure cu inpu
ts
eas
eas
C.I. S2 N
rre nt
I2 S1
WIRING DIAGRAMS
measure
vol
tage
in
puts
measure
vol
tage
in
puts
m ure
vol
tage
in
puts
I1
I3
V L1
V L2
V L3
INSERTION ON THREE PHASE L INE
WITH 3 OR 4 WIRES ELM
on line with 3 wire s (with ou t ne utral or w ith ne utral
no
t supp lied ) the N te rm in al mu st no t be co nn ected L1
S1
P1
S1
L2
P1
L3
N
S1 S2
P1
P2
LO A D
I1
I3
V L1
V L2
V L3
INSERTION ON THREE PHASE
L INE
WITH 4 WIRES AND 3 VT
C.I. S2 N
ELM
P1
L1
S1
L2
S1
P1
L3
N
S1 S2
P1
P2
LO A D
INSERTION ON THREE PHASE
L INE
I1
I2 S1
I3
V L1
V L2
V L3
WITH 3 WIRES AND 2 CT
(insertion AA RON)
* t h e vo l t ag e i n se r t i on w i t h 2 VT i s
possible only for the version w i t h
internal
T A
L1
S1
P1
L2
L3
S2
P2
S1 S2
C.I. S2 N
ELM *
LO A D
P1 P2

ELM-961 instruction manual IM441-U v0.6 pag. 4
measure
vol
tage
in
puts
me
asure cu t inpu
ts
rre n
I2 S1
I1
I3
V L1
V L2
V L3
BALANCED THREE PHASE L INE
C.I. S2 N
ELM
(3EQ mo de)
L1
L2
S1 S2
L3
N
P1 P2
LO A D
measure
vol
tage
in
puts
measure curre nt inpu
ts
INSERTION ON SINGLE PHASE
L INE
I1
I2 S1
I3
V L1
V L2
V L3
if the mu lt im eters a re used on sing le pha se line , th e
m
easure are ref erred a t th e L 3 ph ase.
The
oth ers dat a displayed re la tives a t value o f th re e p hase
syste
m a re no t to consid er.
C.I. S2 N
ELM
S1
S2
L
P1 P2
N
LOAD
Max 150mA
Max 230Vac/dc
D
igi
ta
l
Ou
tp
ut
NOTE:
in the instrum ent version w it h d ig it al ou t pu ts pr og ra mm ed lik e “pulse”
output DO1 for ACTIVE ENER GY puls es
output DO2 for R EAC TIVE ENERGY pulse s
ELM

ELM-961 instruction manual IM441-U v0.6 pag. 5
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)
If it’s selected with the C key the display indicates also the values of the active, reactive and apparent energy
counters. If it’s selected with 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).
If it’s selected with C key the display indicates the type of the energy displayed. If it’s selected with A and B keys,
the display indicates the type of average of maximum values.
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) (only for version with digital output)
- 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.

SET GENERAL PARAMETER (SET UP )
Entry to menu:
seT UP Æ seT Up
RESET
SET DO1
SET
DO2
SET
HR_
ELM-961 instruction manual IM441-U v0.6 pag. 6
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
seT AV9 T Increase
Set average
time
from 1 to
30 minutes Decrease
seT EN TOT PAR
Set Energy visualization NORMAL
ty pe
seT 3pH BALANC
Set connection UN_BAL
Type 1PH L3
seT MDE -3-
Set wiring
connection
type
-4-
seT SYN MDE L3
Set
synchronism 50
type
60
seT PUL SE
Set pulse weight
10.0 kW-kVAr / pulse
(version with digital output)
01.0 kW-kVAr / pulse
0.10 kW-kVAr / pulse
0.01 kW-kVAr / pulse
seT TPL Increase
from
100 to 500 mS
in step by 100 mS
Decrease
(version with digital output)
seT ID ADR Increase
Set address of
netw ork
from
001 to 127 Decrease
(version with serial output)
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
Comunication 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
Passw ord
OFF
- 0002 ÷ 9999 Decrease
Confirm and end of general settings

ELM-961 instruction manual IM441-U v0.6 pag. 7
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 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 ( seT EN )
This setting allows to define the energy visualization type after the visualization of the temperature.
With TOT PAR will have the visualization of the partial and total energy counters. With
NORMAL there will be only the
visualization of total counters (that it’s possible to reset from
RESET menu).
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 L3 .
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
L3 to use the external frequency (on L3 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.
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)
ELM-961 instruction manual IM441-U v0.6 pag. 8
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
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.
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.
RESET ALL: to delete all average and maximum values and all energy hours counters.
Entry to menu:
seT UP Æ seT Up
RESET
SET DO1
SET
DO2
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
(av g )
and maximum demand
(maxD)
RESET EN NO / YES Confirm Reset
Deleting energy
counters
RESET ALL NO / YES Confirm Reset
Deleting maximum and
av erage
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 --- .

PROGRAMMING OF THE DIGITAL OUTPUT (SET DO1 SET DO2) (only for vers. with digital output)
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 ELM).
Enter to menu:
ELM-961 instruction manual IM441-U v0.6 pag. 9
seT UP Æ seT Up
RESET
SET DO1
SET
DO2
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 uLN
ALR SEl AMP
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.

ELM-961 instruction manual IM441-U v0.6 pag. 10
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 ).

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.
ELM-961 instruction manual IM441-U v0.6 pag. 11
seT UP Æ seT Up
RESET
SET DO1
SET
DO2
SET
HR_
--- OFF OFF (the visualization depends on the settings and the I/O status)
HR_ SEl VLN
HR_ SEl AMP
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 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 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
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

MEASURES VISUALIZATION
ELM-961 instruction manual IM441-U v0.6 pag. 12
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
h
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 VL1-L2, VL2-L3, VL3-L1.
VL-N VL-L Hz
°C
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
L3 ) is set, all the measures appear on the L3 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 L3 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).
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.

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.
k
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
phase currents
maximum instantaneous phase currents
max
maxD
avg
ΣW max ΣVAr max ΣVA max
three-phase power
maximum three phase powers (Σ)
max
maxD
avg
I L1 max avg I L2 max avg I L3 max avg
phase currents
maximum of average phase currents (max. demand)
max
maxD
avg
ΣW max avg ΣVAr max avg ΣVA 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
phase currents
average phase currents
max
maxD
avg
ΣW avg ΣVar avg ΣVA 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 ELM multimeter, some problems could
happen concerning the typology of the amperometric inputs.
If there are some problem call the assistance service.
ELM-961 instruction manual IM441-U v0.6 pag. 13

COMMUNICATION INTERFACE EIA485 (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.
Not shielded
connection
As shown in the diagram, it is necessary to place a serial
RS232/485 converter between the RS232 PC's outlet and
the instrument/s.
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). Use always twisted cables with
minimum section of 0,36mm2 (22AWG) and lower capacity
of 60 pF/m (i.e.: BELDEN cable type EIA RS485-
Ref.3105A).
ELM-961 instruction manual IM441-U v0.6 pag. 14
Shielded connection
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.

ELM-961 instruction manual IM441-U v0.6 pag. 15
DIMENSIONS
ELM-961
96
9 56
cut panel
96
96
R3
92
90
92
20

TECHNICAL FEATURES
MEASURES, PRECISIONS
voltage true RMS of the phase voltages an the phase to phase voltages an values of three phase system
range of total measure: 20÷500V trms phase-phase - 290V rms phase-neutral epen ent by the auxiliary
power supply
visualization (0,02÷50,0kV) - measure precision: ±0,5% ±1 igit– management maximum values
current true RMS of the phase currents an of the value of three phase system
range of measure: 0,02÷5A trms - measure precision: ±0,5% ±1 igit
visualization 0,02÷9990A – management average an maximum values
frequency frequency of the L3 phase –range of measure: 45÷65Hz
precision: ±0,5% ±1 igit
powers phase an three phase system reactive an active power
range of measure: 0,001÷9990kW - 0,001÷9990kVAr - 0,001÷9990kVA
precision: ±1% ±1 igit - management average an maximum value
power factor phase an three phase power factor
range of measure: -0,1÷0,1 / precision: ±1%±1 igit -management average an maximum value
energy measure three phase system active, reactive an apparent energy
range of measure: 0÷99999999,9 kWh / kVArh class 2 ( IEC 1036)
precision: ±1%
hours counter precision: ±1%; resolution 1/10 of hour
AUXILIARY POWER SUPPLY, INPUTS
auxiliary power
supply
stan ar 380-415V ±15% - optional 100-125 / 220-240V ±15%
frequency 45-65Hz - consumption 3VA
voltage from the voltage measure input
voltage inputs from 20 to 500V phase-phase ( epen ent from auxiliary power supply); permanent overloa +20% - input
impe ance: 1 MΩ
insertion on three phase line with 3 wires, 4 wires an single phase
insertion in MT with external TV an transforming rate programmable from 0.1 to 400.0
current inputs from 0,02 to 5A; permanent overloa 30% - from external TA with secon ary 5A,
primary programmable from 5 to 10000A - auto-consumption <0,5VA
INPUTS / OUTPUTS
igital outputs Two outputs with common, optomos 12÷230Vac/ c, max 150mA,
Insulation: 3kV for 60 secon
Pulse Function:
Weight programmable 0,01-0,1-1-10 kWh/pulse
Pulse uration 100-200-300 400 500 millisecon s selectable
DO1: active energy pulse output
DO2: reactive energy pulse output
serial output One optional output RS485, bau rate selectable, MODBUS-RTU protocol
Insulation: 3kV for 60 secon
GENERALS
isplay, operators 4 isplays with re LED 10mm everyone of 3 igit by 7 segments
3 push-button for selecting measure an programming
mechanic protection egree: IP52 frontal - IP20 enclosure an terminals - weight: about 0,5 kg
connections with screw terminals for cable 2,5 mm
2
enclosure thermoplastic self-extinguishing
ELM-961: flush mounting DIN 96x96mm, epth 56mm
environmental working temperature: -10÷60°C; humi ity <90%
storing temperature: -25÷70°C
insulation test: 3 kV for 1 minute
stan ar s CEI EN 50081-2; CEI EN 50082-1;
CEI EN 61010-1
NOTE
At reason of the evolution of stan ar s an pro ucts, the company reserves to mo ify in every time the features of the pro uct escribe in this
ocument, that it’s necessary to verify preventively.
The liability of the pro ucer for amage cause by efect of the pro uct ”can be re uce or elete (…) when the amage is cause joint by a efect of
pro uct or for blame of the amage or a person of which the amage is responsible” (Article 8, 85/374/CEE).
Via Lago i Molveno, 20 – 36015 Schio (VI)
Tel. [phone] –Fax [phone]
http://www.elco-italy.com
E-mail: [e-mail]; s[email protected]om
ELM-961 instructionmanual IM441-U v0.6 pag.16