Mx37y_Technical_Description_ENG_v2.00.doc
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─ Single- and three-phase electronic meters with built-in DLC
modem, GSM/GPRS modem or RS485 comm. interface
is transferred from a register for current demand
period into a register for previous demand period and
is compared with a value in a register of the
maximum demand. If a new demand value is larger
than the value in the maximum demand register, it is
entered into the maximum demand register,
otherwise the old maximum demand value is kept. In
this way, a maximum demand is registered at the
meter billing reset.
4.4. Liquid Crystal Display – LCD
The 7-segment LCD, with additional characters and
symbols, complies with the VDEW specifications.
Large characters and a wide angle view enable easy
data reading.
Fig. 23: Liquid Crystal Display – LCD
Data are displayed in the right bottom corner by
means of eight 8 mm high alphanumeric characters.
The OBIS code (by IEC 62056-61) is employed for
data identification. It is displayed in the left bottom
corner by means of five 6 mm high alphanumeric
characters.
An indicator of energy flow direction is displayed in
the left top corner. A physical unit of displayed
quantity is shown in the right top corner. The indicator
of L1, L2 and L3 phase voltages presence is
displayed in the middle of the top row. If certain
phase voltage is not present, the indicator of that
phase is not displayed.
In the LCD bottom row there are eleven signal flags
tha
t indicate current valid tariff, meter status and
alarms. Meaning of each signal flag is engraved on
the meter name plate below each of the signal flags
in use.
4.4.1. Data display
Data defined in Auto scroll sequence and in Manual
scroll sequence are displayed on the LCD. Data from
Auto scroll sequence are displayed in a circle - each is
displayed for 10 sec. On request, longer data display
time can be set. At Manual scroll sequence the blue
push-button should be pressed for displaying the next
piece of data. Data in Manual scroll sequence remains
displayed until the blue push-button is pressed again or
until time for automatic return into the Auto scroll
sequence is not elapsed.
Data that can be displayed are listed in the table
bel
low. Which of them will be displayed depends on
customer request at meter ordering:
CODE DATA DESCRIPTION
0.0.0 Meter serial number
C.1.0 Meter manufacturer number
0.9.1 Time
0.9.2 Date
1.8.0 Total imported active energy (A+)
15.8.0 Total absolute active energy |A|
1.8.1 Imported active energy in the first tariff (T1)
15.8.1 Absolute active energy in the first tariff |T1|
1.8.2 Imported active energy in the 2-nd tariff (T2)
15.8.2 Absolute active energy in the 2-nd tariff |T2|
1.8.3 Imported active energy in the third tariff (T3)
15.8.3 Absolute active energy in the third tariff |T3|
1.8.4 Imported active energy in the fourth tariff (T4)
15.8.4 Absolute active energy in the fourth tariff |T4|
2.8.0 Total exported active energy (A-)
2.8.1 Exported active energy in the first tariff (T1)
2.8.2 Exported active energy in the 2-nd tariff (T2)
2.8.3 Exported active energy in the third tariff (T3)
2.8.4 Exported active energy in the 4-th tariff (T4)
1.6.1 A+ import. max. demand in the first tariff (T1)
1.6.2 A+ import. max. demand in the 2-nd tariff (T2)
1.6.3 A+ import. max. demand in the 3-rd tariff (T3)
1.6.4 A+ import. max. demand in the 4-th tariff (T4)
2.6.1 A- export. max. demand in the first tariff (T1)
2.6.2 A- export. max. demand in the 2-nd tariff (T2)
2.6.3 A- export. max. demand in the 3-rd tariff (T3)
2.6.4 A- export. max. demand in the 4-th tariff (T4)
3.8.0 Reactive energy import total
3.8.x Reactive energy import in tariff x
4.8.0 Reactive energy export total
4.8.x Reactive energy export in tariff x
F.F Meter fatal error
4.4.2. Signal flags
The signal flags in the display bottom row indicate
certain meter status and alarms. The following flags
are active at the MT372 meters (depending on the
meter type – RS485, GSM/GPRS, M-Bus):
INDICATION STATUS MEANING
T1
Lit
The first tariff is active
T2
Lit The second tariff is active
T3
Lit The third tariff is active
T4
Lit The fourth tariff is active
T1, T2,
T3, T4
Blinking
The meter is in the
program mode. Mode is
accessible when seals
from the meter cover are
removed
BR
Lit
Billing reset is activated. It
is lit until expiration of MD
period
SD
Lit
Switching device has
disconnected a customer
(contacts are open)
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