CARLO GAVAZZI WM4-96 - PROGRAMMING User manual

WM4-96: Modular Universal Utility
Meter and Power Analyzer
Harmonic analysis; Energy meters;
Load profile; Plug and play module
system; SMS reception and trans-
mission. These are only a few among
many other functions performed by
your WM4-96. What’s more, Carlo
Gavazzi means ISO9001 certification,
a working experience of many
decades and a widespread presence
all over the world. All this because
we want our customers to have the
top service and the top products.
Welcome in the Carlo Gavazzi world
and compliments for your smart
choice. Visit our website and
evaluate our range of products:
www.carlogavazzi.com
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CARLO GAVAZZI
Automation Components
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2Index
Index
4
4
WM4-96 Instruction manual: INDEX
CARLO GAVAZZI
WM4-96, 32-bit µ-processor based modular universal utili-
ty meter and power analyzer
FW rev.C.01
TO BEGIN WITH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
■Front panel description . . . . . . . . . . . . . . . . . . . . .7
■Display adjustment . . . . . . . . . . . . . . . . . . . . . . . .7
DISPLAYING OF THE VARIABLES . . . . . . . . . . . . . . . . .8
■Page “00”, starting page . . . . . . . . . . . . . . . . . . . .8
■How to scroll the display pages . . . . . . . . . . . . . . .9
■How the F key changes function depending on . . . .
the display page . . . . . . . . . . . . . . . . . . . . . . . . . . .9
❏Pages from “00”to “13”: displaying of the . . . .
variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
❏Pages from “14”to “18”: displaying of the . . . .
MIN and MAX values . . . . . . . . . . . . . . . . . . .9
❏Pages from “19”to “24”: displaying of the . . . .
harmonic analysis . . . . . . . . . . . . . . . . . . . . .10
❏Displaying of the Energy Meters . . . . . . . . . .11
❏Page “25”: displaying of the total energy . . . . .
meters . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
❏Page “26”: displaying of partial energies . . . .10
❏Page “27”: displaying of GAS and . . . . . . . . . . .
WATER meters . . . . . . . . . . . . . . . . . . . . . . .12
❏Page “28”displaying of the instrument’s . . . . . .
configuration . . . . . . . . . . . . . . . . . . . . . . . . .12
❏Displaying of the load profiles . . . . . . . . . . . .12
❏Displaying with “pass code”access . . . . . . . .14
❏Pass “1000”: displaying of recorded events . .14
❏Pass “999”: storage of the consumed energy .15
❏Pass “998”: displaying of recorded var dmd 16

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3
Index
Front panel
2
7
4
❏Pass “997”: reset of data memory . . . . . . . . .16
❏Pass “996”: reset of load profiles . . . . . . . . . .16
LET’S START . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
■Main menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
■Change password . . . . . . . . . . . . . . . . . . . . . . . .18
■Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
❏Analogue measuring input module . . . . . . . . . .
installed . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
❏Analogue measuring input module . . . . . . . . . . .
not installed . . . . . . . . . . . . . . . . . . . . . . . . .21
❏Enabling the tariffs’remote control . . . . . . . .22
■System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
■CT ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
■VT ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
■Display page . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
■MIN MAX values . . . . . . . . . . . . . . . . . . . . . . . . .28
■Selecting the events . . . . . . . . . . . . . . . . . . . . . . .29
■Data storage . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
■Average values calculation . . . . . . . . . . . . . . . . . .31
ENERGY METERS MANAGEMENT . . . . . . . . . . . . . .34
■Access to the management menu of the energy meters 34
❏Single tariff management . . . . . . . . . . . . . . . .34
❏Dual tariff management: whole year . . . . . . . .34
❏Programming of the holidays period . . . . . . . .37
❏Multi-tariff management of the energy meters 39
❏Installed power . . . . . . . . . . . . . . . . . . . . . . .41
❏Reset of the energy meters . . . . . . . . . . . . . .42
❏Reset of the GAS meters . . . . . . . . . . . . . . . .43
❏Reset of the WATER meters . . . . . . . . . . . . .43
OUTPUTS / OTHER SETTINGS . . . . . . . . . . . . . . . . . .44
■Displaying of the harmonics . . . . . . . . . . . . . . . . .44
■Setting of date/hour . . . . . . . . . . . . . . . . . . . . . . .44
■Digital outputs . . . . . . . . . . . . . . . . . . . . . . . . . . .45
❏Pulse output . . . . . . . . . . . . . . . . . . . . . . . . .46

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4Index
The connecting instrument
2
6
❏Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
❏Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . .48
❏Remote control . . . . . . . . . . . . . . . . . . . . . . .49
■Serial port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
❏RS232 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
❏Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
❏GSM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
❏How to use the SMS . . . . . . . . . . . . . . . . . . .52
❏RS485 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
■Digital filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
■Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
USEFUL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . .56
■What is ASY . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
■Operations preliminary to the installation . . . . . . .59
■Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . .59
■Front panel cut-out . . . . . . . . . . . . . . . . . . . . . . .61
■Mounting the instrument . . . . . . . . . . . . . . . . . . .61
■Position of slots and relevant modules . . . . . . . . .62
■Available modules . . . . . . . . . . . . . . . . . . . . . . . .62
❏Digital outputs module . . . . . . . . . . . . . . . . . .62
❏Digital inputs / serial output modules . . . . . .64
❏Power supply modules . . . . . . . . . . . . . . . . . .64
■Optional modules connection . . . . . . . . . . . . . . .65
❏Digital inputs . . . . . . . . . . . . . . . . . . . . . . . . .65
❏Relay output . . . . . . . . . . . . . . . . . . . . . . . . .66
❏Open collector output . . . . . . . . . . . . . . . . . .66
❏RS485 Serial port . . . . . . . . . . . . . . . . . . . . . .66
ELECTRICAL DIAGRAMS . . . . . . . . . . . . . . . . . . . . . .68
❏3-phase connection, balanced load . . . . . . . .68
❏3-phase, 4-wire connection, unbalanced load 69
❏3-phase, 3-wire ARON connections . . . . . . . .70
❏Single phase connection . . . . . . . . . . . . . . . .71
TECHNICAL FEATURES . . . . . . . . . . . . . . . . . . . . . . . .72

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5
To begin with
How to scroll the pages
3
Index
9
7
HOW TO USE THE SYMBOLS
Go to the page where the previous main subject
is described.
Go to the page where the next main subject is
described.
Go to the page where the subject written on the
top of the current page starts.
Go to the page where the subject written on the
top of the current page ends.
This symbol indicates a particularly important sub-
ject or information.
This symbol indicates that more details are given
on the current subject.
We suggest you to keep the original packing in case
it is necessary to return the instrument to our
Technical Service Department. In order to achieve
the best results with your instrument, we recom-
mend you to read this instruction manual carefully.
■WM4-96 PHILOSOPHY (IMPORTANT)
WM4-96 is able to meet all the requirements in the
field of energy management and of power quality analysis.
WM4-96 can work, according to the needs, in three differ-
ent operating modes, obtained by means of hardware and
software configurations.
- direct measurements for monitoring the network quality
and energy metering (LV or MT/HV connection).
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The menu, being without
measuring input module,
is modified.
The menu, without
measuring input mod-
ule, is no more available
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6To begin with
Page 00
5
8
7
- indirect power energy measurements by interfacing the meter
of the energy supplier (LV or MV/HV connection);
- direct measurements for the instantaneous variables (LV
connection) and indirect measurements for the energy
variables (LV or MV/HV).
In all operating modes it’s possible to add the management of water
and gas meters and the tariff management of the energies both from the
instrument and from external inferfacings. The easy management and
flexibility of WM4-96 is possible thanks to the plug and play modular
technology by Carlo Gavazzi and to a powerful 32-bit µProcessor. Also
the analogue measuring input module can be adapted to the users’
needs: the instrument acknowledges its presence adapting its electric
features and its operating mode accordingly. The following icons will help
the user to identify the instrument’s modifications.
■WM4-96: the connecting instrument.
WM4-96 “enjoys communicating”:
•through the wide graphic display and the easily readable
graphs such as the LOAD PROFILES or the harmonic dis-
tortion hystograms;
•through sending and receiving SMS messages by means
of the GSM mobile network. For example, by sending an
SMS message to a pre-defined mobile phone number,
WM496 informs the user that an alarm has been enabled
or disabled; the user himself can ask the instrument, by
an SMS, information about the measured variables.
The manual describes the modification of the menu
in case the measuring inputs module is not installed.

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7
To begin with
Energy meters
5
WM4-96 philosophy
5
11
■Front panel description
Exit from the menu
and cancel the
choice you have
made.
It allows the user to
access some func-
tions relating to the
displayed variables.
Scroll to the
previous page
Scroll to
the next
page
Access to pro-
gramming or
settings’confir-
mation.
Alphanumeric indication by means of a 7-segment
graphic LCD (128x64 dpi):
•of the measured variables;
•total number of energy meters: 4 (9 digits);
partial: 48 (6 digits);
•time periods: 4 programmable within 24 hours;
•programmable seasons: 3 within 12 months.
■Display contrast adjustment
In order to get the best readability of the display, hold the
keys and pressed simultaneously, until the desired
readability is reached; the adjustment is cyclical.
The contrast can be adjusted only during the
measuring phase (from page 00 to page 28).
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8Displaying of the variables
Harmonic analysis
3
Index
10
16
■Page “00”, Starting page
When the instrument is swtched on, the main page of variable
displaying is shown. The first page, called page “00”, is the only one
configurable by the user who can choose the variables to be dis-
played in the 4 displaying areas. In all the other pages the type of
variables displayed in the four displaying areas is automatically
selected and cannot be changed. In the table on page 59 you can
see the contents of all the pages that can be displayed by WM4-96.
The bottom part of the display, where the status of the digital
output is indicated in 4 specific sections, is common to all the
pages. If the outputs are not present, only an empty black rectan-
gular frame is shown, if the outputs are present, the display will
show a letter followed by a number. Four different letters may
appear:
“P”indicates a pulse output
"A" indicates an alarm output. In this case the letter can be white in
a black background to indicate that the output is in alarm, or
black in a white background to indicate that the output is not in
alarm.
"D" indicates a diagnostic output. This is a particular type of alarm
that is activated when the neutral wire connection is missing.
The alarm is active when the background is black, while the
alarm is not active when the background is white.
“R”Remote control is activated (see Remote Control on page 49)
The NUMBER that follows the letter is the progressive number of
the output (from 1 to 4).
Measured variables
Clock
Number of
the displayed
page

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9
Displaying of the variables
Load profiles
7
Front panel
8
13
16
■How to scroll the various pages
To scroll the various pages, use the and keys.
Pressing the key in any one of the display pages,
you access to the programming phase. The key,
on the contrary, has various functions depending on the
selected page.
■How the key changes function depending
on the display page.
❑Pages from "00" to "13" (00 only without measur-
ing input module). Displaying of the variables
key enabled if the alarm latch function is activated,
access to the reset of the latch alarms. To reset the latch
alarm press the key; after that the instrument will dis-
play: “WILL YOU RESET THE LATCH ALARMS?”; If you
choose you will enable the reset procedure, if you
choose there won’t be any reset. The reset of the latch
alarm is only available if the alarm event is finished.
❑Pages from "14" to "18" (from 01 to 02 without
measuring input module). Displaying of the “MIN”
and “MAX”values.
The key is active, that means you have access to
the reset function of the “MIN”and “MAX”values. To reset
the “MIN/MAX”recording, proceed as follows: enter the
function by pressing the key, after that a message will
appear: “WILL YOU RESET MIN/MAX VALUES? WILL YOU
CONTINUE?"; if you choose there won’t be any reset,
if you choose the reset will not be made. The and
keys allow you to select the range/value that you want
to reset; to confirm the reset press the key again. To exit
the function press the key again.
F
S
▼▲
S
F
F
F
F
S
F
F
F
F
S
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10 Displaying of the variables
Display of Gas Water meters
5
WM4-96 philosophy
8
12
16
❑Pages from "19" to "24" (from 10 to 11 in single
phase mode) Displaying of the harmonic analysis
When the instrument is supplied, these pages are
not enabled, see page 44 to enable them. The
key is active: access to the detailed analysis of the
harmonics. After pressing the key, a pointer appears
along the horizontal axis (see figures below). To display the
data relating to the single harmonics move along the his-
togram using the (moves from left to right) and
(moves from right to left) keys. For each harmonic the instru-
ment measures the % value with reference to the funda-
mental and the single harmonic angle between the “V”har-
monic and the “A”harmonic of the same order.
▼▲
F
F
Line phase being measured
and relevant voltage or cur-
rent value (L1-L2-L3).
Total harmonic distortion and
relevant value in percentage
Phase angle between the voltage and current harmonic
of the same order: a phase angle between 0°and 90°and
between 270°and 360°corresponds to a generated har-
monic; an angle between 90°and 180°and between 180°
and 270°corresponds to an imported harmonic.
Harmonic order (h1 to h50),
relevant conventional sign
(- or +) and value of the har-
monic given in percentage.
The pointer
shows which
harmonic is
being meas-
ured
SIMPLE ANALYSIS:
Harmonic order (h1 to h50),
of the phase being measured
(L1-L2-L3) and relevant
absolute current or voltage
value of the harmonic.
DETAILED ANALYSIS:
F
F

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11
Displaying of the variables
Pass 999
9
Displaying of min/max values
8
15
16
❑Pages relating to the energy meters
❑Page "25" (3 without measuring input module)
Displaying of the total energy meters
key disabled.
❑Page "26" (4 without measuring input module)
Displaying of partial energies
key is active; modification of tariff/displayed period.
By pressing the key for the first time, the range relating
to the season is highlighted. By using the and keys,
it’s possible to change the season displayed in that page.
Pressing the key once again, the range relating to the
period is highlighted. Using the and keys, it’s pos-
sible to change the tariff period within the displayed season.
Pressing the key for the third time, you go back to the
measuring page.
The changes of season and tariff period only refer to the dis-
playing of the values stored in the corresponding season
and period.
The changes carried out in this page do not have any
influence on the method of tariff management of the
instrument; they are only valid for display purposes.
F
▲▼
F
▲▼
F
F
F
This angle is displayed only if the measurements
are taken in a three-phase system with neutral
Generated
Imported
0°
90°
180°
270°
Harmonics:

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12 Displaying of the variables
Pass 1000
7
Front panel
8
14
16
❑Page "27" (5 without measuring input module)
Display of Gas and Water meters
keys disabled. Depending on the setting, the instru-
ment may display one only of the following meter combina-
tions: Gas; Gas with Gas in night tariff; Gas and Water. The
water and gas meters are managed by the digital inputs.
❑Page “28”(6 without measuring input module)
Displaying of instrument configuration
key disabled. Page 28 shows the configuration of
the main input (IN) and output (OUT).
F
F
Alarms
(A1-A2-A3-A4).
Diagnostic
(D1-D2-D3-D4).
Digital inputs.
Puse outputs
(P1-P2-P3-P4).
The letters and numbers between parenthesis are referred to
the relevant slots, while the text on their right shows the vari-
able referred to the output. With reference to the digital inputs
(DIG.INP.), the ON/OFF status of each one of them is shown.
❑Displaying of load profiles
The load profiles are a simple graphic representation use-
ful to highlight the trend of the load consumption (integrated
power) with reference to the installed power (as per contract).
This function needs the serial module AR1041 to be installed.
The instrument calculates and displays the load profiles

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13
Displaying of the variables
Access to the main menu
11
Displ. of partial energies
8
17
16
depending on the acquired data, dividing them into: daily,
weekly and monthly graph, as simplified by the figures shown
above. Press the key: you can display the single integra-
tion periods and the details relevant to the installed power
F
Wdmd of the last integration
period
Time of the last integration
Installed power
Graphic representation
of the consumptions
Load profile of the
installed power divided
into hour time periods
Example: the con-
sumed power integrated
in 15 minutes exceeds
the installed power
Pressing , the instrument
will display in detail the data indi-
cated by the arrow that will
appear on the abscissae axis.
To scroll the single data use the
keys. To exit the detailed
display mode press .
F
F
F
Daily graph:
15-minute resolution,
total time: 24 hours.
Weekly graph:
2-hour resolution,
total time: 7 days.
Monthly graph:
12-hour resolution,
max. total time: 31 days.
F
F

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14 Displaying of the variables
Pass 997
9
Measuring pages: 00 to 13
8
16
16
programmed for that hour time period, the storage time of the
Wdmd sample and the relevant value. The data can be
scrolled by means of the and keys and are relevant to
the indication of the arrow that appears on the ascissae axis.
To go back to the normal display, press the key again.
If the instrument has not acquired enough data to
cover the resolution of the graphs (day: at least 15
minutes; week: at least 2 hours; month: at least 12
hours) the latter are not displayed and the message: “NOT
AVAILABLE”appears. When the data are enough for the grah-
ph to be displayed, wait a few seconds for the acquired data
to be processed.
❑Displaying with access to the Pass Code
❑Pass "1000": Displaying of recorded events
(Only if the RS232 + RTC module + data memory is present)
Press the key in any of the measuring page (exclud-
ed the “load profiles”) when the instrument asks for
, set the value “1000”and confirm with
; the instrument shows you the page where the events
are displayed and where the instrument stores, in a chrono-
logical order, the alarms that have occurred until that
moment. To go back to the variable page press the key.
The last event has always the number 1 while the number
corresponding to the first event varies, depending on the
number of events that have been previously stored. The fig-
ure on the following page explains you the meaning of the
displayed information.
F
S
S
F
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15
Displaying of the variables
Input programming
13
Load profile
8
19
16
To reset all the events press the key, to continue the
reset procedure press the key again: to exit from the
reset procedure press the key.
❑Pass "999": display of energy consumption storage
(Only if the RS232+RTC is present)
The RS232+RTC module allows the user to display the storage
of the energy consumption of the previous two months. To enter
this function, press the key in any one of the measuring page
(excluded the “load profiles”),
when the instrument asks for the
pass code ,
set the value “999”: the instru-
ment shows you the page where
the energy values are stored.
Use the and keys to display the partial values;
press the key to exit.
F
▼▲
S
F
S
S
Control type:
alarm (e.g.: A2),
diagnostics (e.g.: D1),
maximum value (MAX),
minimum value (MIN).
Only for alarms and diag-
nostics: detection of the
abnormal condition (ON) or
return to the normal condi-
tion (OFF)
Variable being
controlled.
Alarms: value of
the ON alarm;
Max and Min log-
ging: maximum
and minimum
measured values.
Time of the
event.
Date of the
event.

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16 Displaying of the variables
Inputs
11
Energy Meters pages
8
18
❑Pass "998": display of the stored dmd variables
(Only if the RS232 + RTC module is present)
The stored dmd variables can be displayed by pressing
the key in any one of the measuring page (excluded the
“load profile”pages): when the instrument asks for the
, enter the value “998”: the instrument will
display the values of the stored variables, the time (hours-
minutes-seconds) and the date (day-month) of storage.
Use the and keys to scroll
all the values; to exit press the
key. If the value has not been
stored, the instrument displays
“NOT AVAILABLE VALUE”.
❑Pass "997": Reset of the Data Memory (only if the
RS232+RTC module is available)
It’s possible to reset all the information stored in the data mem-
ory. To enter this function press the key in any one of the
measuring pages (excluded the “load profile”pages), when the
instrument asks for , enter the value “997”and
confirm with , then press to confirm the reset; press
not to execute the reset.
❑Pass "996": Reset of the load profiles
It’s possible to reset all the information relating to the
load profiles. To enter this function, press the key in any
one of the measuring pages (excluded the “load profile
pages”), when the instrument asks for
enter the value “996”and confirm with , then press again
to confirm the reset, press not to execute the reset.
F
SS
S
F
SS
S
F
▼▲
S

It is very important to verify that, every time the
configuration of the instrument (modules and/or
associated variables, electrical systems, etc.)
changes, the setting of the parameters is
according to the new configuration.
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17
Programming
Digital inputs progr.
15
Pass 999
21
33
F
F
▼
▲
S
S1.2..
..2.1
MENU title
Scroll bar
Instrument’s revision
Menù
Serial number
■Access to the main menu
Press the key to access
to the programming menus from
the measuring and displaying
phase (you cannot access the
main menu if the instrument is in
the displaying pages of the load
profiles); when the instrument
asks for the password, enter its
correct value by means of the
and keys; then confirm
it by pressing the key again.
If the password is correct (the
default password is 0) you are
allowed to access to the main
menu of the programming
phase. To reset your choice and
go back to the measuring mode,
press .
F
S
▲▲
S

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18 Programming
A3-C3 Inputs
13
Load profiles
17
20
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■Change Password
This function allows you to
choose the desired password
value (from 0 to 500).
Press the key and when the
new password value is required,
enter the desired value by means
of the and keys; then
press the key to confirm the
new value.
The instrument goes back to the
main menu, as shown in the fig-
ure on the left. To reset your
choices and go back to the main
menu press .
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Measure
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■Inputs
Depending on the hardware
configuration being used, the
instrument works in two different
operating modes:
❑With installed analogue meas-
uring input module (AQ1018-
AQ1019).
The instrument carries out all
the measures of: instantaneous,
power, THD variables and ener-
gy metering. It’s also possible to
select the gas and water meter-
ing, as well as gas and night tar-

with ; choose “ON”to enable the metering: the following
window appears: selection between H2O/GAS and kWh- (gen-
erated Kwh) “ENERGY METER”; choose the desired type of
counter by means of and , confirm with (if you
choose the kWh- metering, also the A2 input for counting the
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Programming
List of digital inputs
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Access to the main menu
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iff gas metering: to do this the
AQ1042 digital inputs + aux mod-
ule must be installed in slot A.
Choose the “INPUTS”function by
means of the and keys
and press to enter in the sub-
menu. Choose the “MEASURE”
function by means of the and
keys; press to select the
relevant operating mode and enter
the relevant sub-menu where you
can select the digital inputs (if pres-
ent in slot A) connected to the gas,
water and energy meters.
1- Choose the A1 INPUT (gas or
kWh- meter) by means of the
and keys (the description of
the selected input function and the
weight of the connected pulse can
be seen under the scroll window);
press to confirm.
2- Once the ON/OFF window is
displayed, choose “OFF”by
means of the and keys to
disable the metering and confirm
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20 Programming
Tariffs remote control
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Display of consumed energy
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kvarh- will be enabled).
3- Once the desired type of meter is confirmed, the instru-
ment asks for the number of pulses to be associated to the
unit increase (e.g. if you type the value 10 you will need 10
input pulses in order to make the instrument display 1 m3).
4- A2 INPUT, enabling function of the water metering or of
the kvarh- meter (generated kvarh); ENERGY METER”fol-
low the operations described on paragraphs 1 and 2. If the
H2O/GAS meter is selected, the window for the selection of
the night gas tariff appears: GAS TARIFF or WATER METER
for the water meter. Choose the desired option by means
of the and keys and confirm with . By choos-
ing “WATER METER”or kvarh- meter (when the kvarh is
chosen, automatically also the A1 input is enabled to count
kWh-) the instrument shows the box where the increase
pulses to be associated with the unit increase are to be
entered (e.g. if you enter the value 10 you will need 10 input
pulses for the instrument to display 1m3). Press to go
back to the previous menus.
-A3 and C3 INPUTS: see “Enabling the remote control of
the tariffs”on page 22.
-C1 and C2 INPUTS: not available.
Inputs A1 and A2 must both count either energies
or m3(GAS/H2O); if for example you choose A1
as Wh- meter and then you select A2 as H2O
meter, WM4 automatically changes the A1 input
as GAS meter.
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