Gossen MetraWatt U1281 User manual

Operating Instructions
Electronic Active Energy Meters
U1281/U1289/U1381/U1387/U1389 3-349-275-15
9/7.06
MAIN PISTRIBUTION – PRODUCTION
1 Safety Precautions – Symbols ...........................2
2 Serial Plate – Terminals ....................................4
3 Pulse Output – Bus Interfaces ............................6
4 Display and Control Panel ..................................7
5 Error Messages – Reset ...................................14
6 Meter calibration – Maintenance .....................15
7 Product Support ...............................................15
8 Repair and Replacement Parts Service ............16
Chapter PageContents

2 GMC-I Gossen-Metrawatt GmbH
1 Safety Precautions – Symbols
– Check the specified nominal voltage on the serial plate
before placing the instrument into service.
– Observe the maximum voltage of the pulse output.
– Make sure the connector cables are not damaged, and
that they are voltage-free while wiring the instrument.
– If it can be assumed that safe operation is no longer pos-
sible, the instrument must be immediately removed from
service (disconnect input voltage!). Safe operation can no
longer be relied upon if the instrument demonstrates visi-
ble damage.
The device may not be placed back into operation until
troubleshooting and repair have been performed, and
calibration and dielectric strength have been tested and
approved at our factory or an authorized service center.
– Voltage conducting parts may be exposed if the cover is
opened.
If balancing, maintenance or repair of a live open instru-
ment is required, work may only be carried out by trained
personnel who are familiar with the dangers involved.
Capacitors inside the instrument may be dangerously
charged, even after it has been disconnected from all
power sources.
– After the instrument has once again been closed subse-
quent to repair or maintenance work, insulation must be
tested with high-voltage in accordance with the values
specified in the technical data.

GMC-I Gossen-Metrawatt GmbH 3
Meaning of Symbols on the Instrument
Label with seal from federally
approved test authority
Warning concerning a source of danger
(Attention, observe documentation!)
Total insulation,
Safety Class II device
Indicates EC conformity
Symbol for type approval
This device may not be disposed of with the trash.
Further information regarding the WEEE mark can
be accessed on the Internet at www.gossenmetra-
watt.com by entering the search term ’WEEE’.
Circuit Symbols:
4-wire circuit 3-wire circuit
2-wire circuit
For symbols on the LCD see chapter 4.3.
Tamper-proof sealing of terminal cover
Tamper-proof sealing for the terminal cover is attached
either at the left or right-hand side of the terminal cover.
Tamper-proof Sealing of Housing
Drill holes are provided at the rear housing panel for tamper-
proof sealing attached by the test authority. The housing
may only be opened by the
GMC-I Gossen-Metrawatt GmbH
service department or other authorized personnel.
EB
8
03
!
YV

4 GMC-I Gossen-Metrawatt GmbH
2 Serial Plate – Terminals
Symbol for system type (U1389: Y, U1387: V, U1381: I) Type designation
Nom. voltage
Nom. current
Nominal frequency
LED constant
Year of manufacture
Accuracy class
CT: Current transformer transformation ratio
VT: Voltage transformer transformation ratio
Serial number
Pulse outpput
(Max. current)
External auxiliary
Type dependant
designation
Type approval
The values of CT, VT and S∅on the serial plate can be / are calibrated
Bus connection
voltage

GMC-I Gossen-Metrawatt GmbH 5
Voltage Voltage Voltage
Current Current Current
L3L2L1 N
S0
CurrentCurrentCurrent
Inputs
≤2.5 mm2 with wire end ferrules or
≤16 mm2 without wire end ferrule
≤2 x 1.5 mm2 without wire end ferrule
Voltage:
Current:
≤
2.5 mm
2
with wire end furrule or
≤
2 x 1.5 mm
2
without wire end ferrule
Auxiliary voltage
H
BUS
Enable key
24 V
±
10%
(Feature H1)
Pulse output
H
12 3 4 5 6 78 9112021222324
+–
Tighten screws by hand only! Tightening torque
Note:
Observe the wiring diagram in the terminal cover
Attention:
!for current terminals (No. 1, 3, 4, 6, 7 and 9) = 2 Nm
for all other terminals (No. 2, 5, 8, 11, 20 to 24) = 0.4 Nm

6 GMC-I Gossen-Metrawatt GmbH
3 Pulse Output – Bus Interfaces
underligned values are default values in as-delivered condition
The interface descriptions for the active energy meters are
available on the Internet under www.gossenmetrawatt.com.
Pulse rates fix V1/V3 Programmable V2/V4
Direct
U1281 / U1289
1000 pulses/kWh 1 … 1000 pulses/kWh
Transformer U1381 / U1387 / U1389
f (secondary) f (secondary)
CT = VT = 1 (Q0) 1000 pulses/kWh
1 … 1000 … 10000 pulses/kWh
CT, VT progr. (Q1) 1000 pulses/kWh 1 … 1000 … 10000 pulses/kWh
CTxVT; CT, VT fixed (Q9) f (primary) f (primary)
1 …10 1000 pulses/kWh 1 …1000 pulses/kWh
11 …100 100 pulses/kWh 0,1 …100 pulses/kWh
101 …1000 10 pulses/kWh 0,01 …10 pulses/kWh
1001 …10000 1 pulses/kWh 1 …1000 pulses/MWh
10001 …100000 0,1 pulses/kWh 0,1 …100 pulses/MWh
100001 …1000000 0,01 pulses/kWh 0,01 …10 pulses/MWh
R
L
+
20
21
U
t
External Voltage Source
Energy Import
max. 40 V
RL
20
21
U
t
AC/DC
Energy Import
max. 375 V
~
24 V DC
I = max. 100 mA
I = max. 27 mA
U U
External Voltage Source
Pulse duration: 30 ms + 5%, Interpulse period: > 30 ms

GMC-I Gossen-Metrawatt GmbH 7
4 Display and Control Panel
4.1 Test LED
The test LED is located between the LCD and the serial
plate. The higher the measured power value, the higher the
blink rate.
If all currents are lower than the starting current, the LED
lights up permanently.
LED Constant
U128x: 10 000 pulses/kWh
U138x: 100 000 pulses/kWh
4.2 Resolution of Energy Import Main Display
* the calibration reading indicates an additional digit after
the decimal point. Therefore, the leading digit is omitted in
the case of 7-digit presentation.
Meter
Feature
CTxVT
min.
CTxVT
max.
Standard
Reading
Calibration
Reading *
Unit
U1281,
U1289 — — 123456.7 23456.78 kWh
U138x
Q0, Q1
or Q9 1 10 12345.67 2345.678 kWh
Q1 or Q9
11 100 123456.7 23456.78 kWh
101 1000 1234567 234567.8 kWh
1001 10000 12345.67 2345.678 MWh
10001 100000 123456.7 23456.78 MWh
100001 1000000 1234567 234567.8 MWh

8 GMC-I Gossen-Metrawatt GmbH
4.3 Meanings of Symbols on the LCD
U
Main display is not/cannot be calibrated,
if
U is displayed.
Correct connection:
Continously lit phase symbols
Phase failure:
Symbol for affected phase is cleared from display.
Incorrect phase sequence:
Phase symbols blink in the following order: 3-2-1.
Negative power:
Respective phase symbol blinks.
4 quadrant display of instantaneous power: posi-
tive or negative active power P, positive or nega-
tive reactive power Q.
For bus connection: appears when the
meter transmits a data packet.
Main display (active energy Etot* in kWh or MWh)
Auxiliary display (instantaneous power Pmom* in kW or MW)
Error: alternating error code and instantaneous power
* U138x: CT and VT are taken into consideration

GMC-I Gossen-Metrawatt GmbH 9
Key Symbols for Parameters Configuration
Key and 2nd key bit blanked:
Parameters CT, VT or SØ configurable according to
features, can be disabled with enable key.
Key displayed with one key bit:
Parameters CT, VT or SØ disabled,
can be changed after activating enable key.
Key blanked, 2nd key bit displayed:
Parameters CT, VT or SØ (which are / can be cali-
brated) are preset at the factory, can be queried in the
display mode, other values can be set.
Key with 2nd key bit displayed: parameters (which can be /
are calibrated) are preset at the factory, other values are
disabled with enable key and can be reset after cancel-
ling the disable function.
Values which are preset at the factory are specified addi-
tionally on the serial plate in as-delivered condition.
Symbols Adjustable
parameters
Disabled
parameters
Fixed/
calibrated
parameters
Feature
CT, VT Q1
SØ V2, V4
CT, VT Q1
SØ V2, V4
CT, VT SØ Q1 and V1/V3
SØ CT, VT
V2/V4 and Q0/Q9
CT, VT SØ Q1 and V1/V3
SØ CT, VT V2/V4 and Q0/Q9
SØ, CT, VT V1/V3 and Q0/Q9

10 GMC-I Gossen-Metrawatt GmbH
4.4 Key Operation
Querying parameter values CT, VT and S∅
Apart from the LCD test, the menu key located between
LCD and serial plate serves to query current paramter val-
ues and, in the case of active energy meters with special
features, to change parameters (provided that the enable
key has been activated before). The sequence can be seen
from the figure on the right.
If no key is pressed for 2 minutes, the display returns auto-
matically to the standard setting.
Parameters can be changed in the following instruments:
Parameters CT, VT for U138x with feature Q1,
parameters S∅for U128x/U138x with feature V2/V4
a) Enabling parameter modifications
The enable key serves to enable or disable paramter
changes. It is located below the terminal cover and is acti-
vated with a pointed object (e. g. ballpen).
Pressing the key for the first time activates operating mode
„Change parameters“ (key off):
Renewed activation disables operating mode „Change
parameters“ (key on):
If the key is not activated for approx. 2 minutes, operating
mode „Change parameters“ is automatically aborted and
blocked.
The key is displayed again:
→
→
→

GMC-I Gossen-Metrawatt GmbH 11
b) Changing parameter values
➭Briefly press the enable key first, as described under
Item a) (activates operating mode „Change parame-
ters“).
➭Press and hold the menu key once until the read-out
test is displayed.
➭Repeatedly press the menu key until the parameter to
be changed appears at the display.
➭Press and hold the menu key until the parameter value
at the digit with the highest value (on the far left-hand
side) blinks.
➭You can increase the value of the blinking digit by
pressing the menu key (fast scroll when key is held). If
the key is not activated for a few seconds, the selected
digit is stored and the entry cursor moves one digit to
the right. The selected value is stored when the digit
with the lowest value (on the far right-hand side) stops
blinking.
➭Press the menu key several times until the standard dis-
play appears.
➭Press the enable key once more. This disables operat-
ing mode „Change parameter values“.
Query and Configuration of LON-Bus (Feature W1)
M-Bus (Feature W2) and L-Bus (Feature W3)
The interface descriptions for the active energy meters with
bus connection are available on the internet under
www.gossenmetrawatt.com.

12 GMC-I Gossen-Metrawatt GmbH
123456 . 7
1 234
kWh
kW
100
Ct
1
V t
1000
PER
888888 . 8
8 888888 . 8
kWh
kWh
0200
Ct
0002
V t
M
1000
PER kWh
Auto
Auto
Auto
kWh
S0
M
M
M
m
m
001000 . 0
0 000010 . 0
kWh
kWh
m
m
Primary energy
Secondary energy
Calibration
m
Standard
Read-out test
M
Auto
0001 . 00
0000
V er
Firmware version
Pulse rate
vt
ct
000230 . 0
0000V10
V
m m
...
M
Auto
Read-Out
S0
AutoAutoAuto Auto Auto
U138x with Feature Q1
U138x with Feature Q1
Feature V2/V4
Parameter modifications
only after enabling
bus-specific menus see
interface descriptions
0 . 100
seC
S0
m
Auto
Pulse duration
Setup
range
0.030 ...
3.000 s
read-out
new as from firmware version 2.10
Auto
M
Feature V2/V4
0 . 100
seC
S0
Setup
range
see
chapter 3

GMC-I Gossen-Metrawatt GmbH 13
00049 . 90
00F0H z z00
m m
...
m
M
Auto
Multifunctional display – Feature M1
Phase voltage U1N, U2N, U3N
Delta voltage U12, U23, U13
Current I1, I2, I3
Active power P1, P2, P3, Ptot
Reactive power Q1, Q2, Q3, Qtot
Apparent power S1, S2, S3, Stot
Power factor PF1, PF2, PF3, PFtot
Frequency F
Key
Auto Automatic scrolling
ct Transformation ratio current
m Press the menu key briefly
M Press and hold the menu key
Q1 Feature: Transformation ratios programmable
S0 Pulse rate S∅ output
vt Transformation ratio voltage
V2/V4 Feature: rate programmable

14 GMC-I Gossen-Metrawatt GmbH
5 Error Messages – Reset
Read-out
If an error occurs, the respective error code and instanta-
neous power are displayed alternately.
Reset
In the event of malfunction or or after eliminating an error,
the device can be reset briefly by disconnecting auxiliary
power or supply power.
Error Code Meaning Cause/Remedy
E 0 VHi1 Maximum value for U1
exceeded
E
0 VHi 2Maximum value for U2
exceeded
E
0 VHi 3 Maximum value for U3
exceeded
E
0 1Hi1 Maximum value for I1
exceeded
E
0 1Hi 2 Maximum value for I2
exceeded
E
0 1Hi 3 Maximum value for I3
exceeded
E
0 SYnc Frequency measuring
error
Meter connected to
direct voltage
E 0 EnErgY Meter defective Send meter to repair
department
E
0 cALib Balancing required
E
0 AnALog DC offset too high

GMC-I Gossen-Metrawatt GmbH 15
6 Meter calibration – Maintenance
Duration of
calibration validity: 8 years
Note for Test Laboratories
Directly measuring meters (U128X):
In as-delivered condition, screw terminals 2, 5 and 8 are
tightened in order to establish contact between current and
voltage inputs.
If isolated voltage supply is required for tests, the screw ter-
minals can be released (remove screw cover, release
screws, pull insulating sleeves over contact pins in the ter-
minals and connect simulator voltage).
Calibration Reading
For testing and calibration purposes the energy values can
be displayed with a higher resolution. Press the menu key,
as shown in the flowchart in chapter 4.4. Refer to chapter
4.2 for the type and feature dependant resolutions.
Maintenance
No special maintenance is required. Use a slightly damp-
ened cloth for cleaning. Avoid the use of solvents, cleansers
and abrasives.
7 Product Support
If required, please contact:
GMC-I Gossen-Metrawatt GmbH
Product Support Hotline
Phone [phone]
Fax [phone]
E-Mail [email protected]

Edited in Germany • Subject to change without notice • A pdf version is available on the
Internet
GMC-I Gossen-Metrawatt GmbH
Thomas-Mann-Str. 16-20
90471 Nürnberg • Germany
Phone [phone]
Fax [phone]
E-Mail [email protected]
www.gossenmetrawatt.com
8 Repair and Replacement Parts Service
If required please contact:
GMC-I Gossen-Metrawatt GmbH
Service Center
Thomas-Mann-Straße 20
90471 Nürnberg • Germany
Phone [phone]
Fax [phone]
E-Mail [email protected]
This address is only valid in Germany. Please contact our
representatives or subsidiaries for service in other countries.
Competent Partner
Federally approved test authority EB8
Initial calibration of meters from
GMC-I Gossen-Metrawatt GmbH can be executed after
procurement as well. Recalibration is possible at any time.