AMS MFA-2001 User manual

User Manual
MFA 2001
Universal Multifunction Meter
________________________________________________________________________________
Automatische Mess-und
Steuerungstechnik GmbH
91275 Auerbach • Enge Gasse 1Phone [phone] / 92 05 - 0 Internet: www.ams-messtechnik.de
91270 Auerbach • Postfach 1180 Telefax +49 (0) 96 43 / 92 05 -90 e-mail: [e-mail]
________________________________________________________________________
Subject to technical changes UM 410.01 Rev.: 19.07.2006

2
Table of contents page
1Product description ........................................................................ 3
1.1 Application.......................................................................................... 3
1.2 Working principle ............................................................................... 3
1.3 Calibration ......................................................................................... 3
2Installation and starting up ............................................................ 3
2.1 Installation notes ................................................................................ 3
2.2 Inputs, outputs and interfaces............................................................ 4
2.3 Possible connections ........................................................................ 5
3Operation ......................................................................................... 6
3.1 Controls ............................................................................................. 6
3.2 Display layouts .................................................................................. 6
3.3 Additional display .............................................................................. 7
4Setup ................................................................................................ 8
4.1 General notes .................................................................................... 8
4.2 Possible parameters and factory presets .......................................... 9
4.3 Setting the voltage transformer translation ratio ............................... 10
4.4 Setting the current transformer translation ratio ................................ 10
4.5 Setting the integration time (bimetal function).................................... 11
4.6 Setting the limit values ...................................................................... 11
4.7 Deleting and resetting ....................................................................... 15
4.8 Setting the password ......................................................................... 16
4.9 RS 485 settings (optional) .................................................................16
4.10 Profibus DP V0 settings (optional) .................................................... 17
4.11 Setting the analogue output (optional) .............................................. 17
5Terminal configuration ................................................................... 20
6Technical details ............................................................................. 21
7Dimension drawing ......................................................................... 23
8Maintenance .................................................................................... 23
9Product service ............................................................................... 23

3
1Product description
1.1 Application
The multifunction meter MFA 2001 is an electronic universal measuring device for measuring and
monitoring all the important parameters in a three-phase supply network with a centre tap
connection. The MFA 2001 is designed for fixed installation and registers voltages, currents,
frequencies and phase shift. It then calculates the active power and reactive power as well as the
power factor for each phase and for the entire network. Furthermore active energy and reactive
energy are being displayed for the entire network. An operating time counter is included.
Two limit values can be defined for each network parameter (LIMIT 1, LIMIT 2) which trigger an
alarm if any reading is either exceeding or falling below the specified programmed parameters.
Output is triggered via a switching transistor. The alarm outputs can also be configured as impulse
outputs then sending a chain of impulses. The impulse ratio is proportional to the active energy.
Optionally a galvanically separated current loop signal (0 / 4 ... 20 mA) is available. AnRS 485
interface or alternatively a Profibus DP V0 interface is also optionally available.
On request the MFA 2001 can be equipped with a separate input to connect an auxiliary power
supply (230 V AC or 24 V DC).
1.2 Working principle
The MFA 2001 is based on a highly integrated measuring system employing a very modern
manufacturing process. All voltages and currents are being fed directly into the system, which
detects all network parameters. A high-performance micro processor then utilizes the data to
accurately display the active values using the calibration settings stored in its flash memory.
1.3 Calibration
The MFA 2001 leaves the production line ready calibrated. All details concerning accuracy apply
only to the product itself and exclude phase faults generated by any upstream current transformers
that might be connected.
2Installation and starting up
2.1 Installation notes
The multifunction meter is designed for the fixed installation in low and medium-high voltage
systems. The device may be mounted in any position.
The installation of the MFA 2001 must be carried out by a qualified technician. The legal
regulations applying to a specific application have to be taken into account by the qualified
technician.
Switchboard installation:
Metal switchboards or switchboard doors must be earthed.
Before connecting the MFA 2001 make sure that the condition of the local network corresponds
to the information supplied on the identification plate.
The device does not have its own power on/off-switch. Therefore, when mounting the device the
following must be observed:
-a switch must be installed with the power supply
-the switch must be fitted near the device for easy reach
-the switch must be labelled as being the separator switch for the device

4
Connections:
All connections of the MFA 2001 are situated on the back of the casing. The block terminals
are using screws to ensure safe and reliable connectionswith the network.
For your attention !
¦ Voltages above the permitted voltage range can destroy the device!
¦ Any current transformer terminals that are not earthed, might be dangerous when touched!
¦ Secondary current transformers that are not under load can hold voltages high enough to be
dangerous when touched and should therefore be short-circuited!
2.2 Inputs, outputs and interfaces
Voltage input:
It is possible to measure phase voltages of up to 475 V in a three-phase network without using
external transformers. For measurements in medium-high voltage networks voltage transformers
can be used.
Available designs:
Standard, without auxiliary power:
340 ... 400 ... 475 V AC, L-L (196 ... 230 ... 275 V AC, L-N)
Measuring range 2 (optional), without auxiliary power:
94 ... 110 ... 132 V AC, L-L (54 ... 63.5 ... 76 V AC, L-N)
Standard, with auxiliary power:
40 ... 400 ... 475 V AC, L-L (23 ... 230 ... 275 V AC, L-N)
Measuring range 2 (optional), with auxiliary power:
11 ... 110 ... 132 V AC, L-L (7 ... 63.5 ... 76 V AC, L-N)
All voltage inputs must be connected through lines protected by a fuse (2-6 A).
Current input:
The current inputs are not galvanically separated within the device. Current transformers must be
used for measuring currents. Their primary and secondary current values can be programmed
enabling the current values to be directly displayed.
Two measuring ranges are available:
Standard
Measuring range 2 (optional) 0.05 ... 5 ... 6 A 0.01 ... 1 ...1.2 A
For your attention !
¦ If the current transformers are being earthed at the secondary end the connection must be made
on terminals “l” to ensure correct functioning of the device!
¦ If any of the current display shows “-“ the respective current direction is wrong. In that case the
terminals “k” and “l” must be checked and the polarity should be reversed if necessary.
Auxiliary power:
With the standard option the auxiliary power needed to operate the MFA 2001 is supplied via the
phase L1. Optionally the system is available with a separate auxiliary power input for voltages of
either 230 V AC or 24 V DC.
The supply voltage must correspond to the information supplied on the identification plate.
Attention has to be paid to making the correct connections.

5
Limit values/impulse output:
Of each of the measured or calculated network parameters limit values can be monitored.
These limit values can be assigned to both of the switched outputs.
One or both of the limit value outputs can optionally be set as impulse output. Then a chain of
impulses with the impulse ratio being proportional to the active energy is sent to the output.
Communication interface (optional):
The MFA 2001 can be optionally equipped with anRS-485 Interface. Alternatively a Profibus DP
communication interface is available.
Analogue output (optional):
Any of the measured or calculated network parameters can be assigned to the analogue output.
With this option external logging or running secondary control loops is possible.
The output is a current output freely programmable from 0 ... 20 mA or 4 ... 20 mA.
2.3 Possible connections

6
3. Operation
3.1 Controls
The multifunction meter is operated by 4 control keys:
When in display mode the 4 keys serve as hotkeys to activate pre-programmed display
combinations. When in setup mode the keys are used to select the desired menus or program the
device.
Key T2( € ) moves the display mode of the three main displays up one position, the key T1 ( • )
moves down one position. Key T3 ( OPT ) selects the options of a specific display combination.
Key T4 ( EIN ) selects the display mode of the 8-digit additional display layouts (operating time
counter, active energy, reactive energy or €no display•).
3.2 Display layouts
The following table shows the display layout presets:
______________________________________________________________________________
Display Option Display Description
selection
T2 (‚) T3 (OPT)
______________________________________________________________________________
1 1 U L1-N Present voltage phase-zero
U L2-N
U L3-N
2U L1-N min Minimum voltage phase-zero since
U L2-N min last reset
U L3-N min
2 1 U L1-L2 Present voltage phase-phase
U L2-L3
U L3-L1
2U L1-L2 min Minimum voltage phase-phase since
U L2-L3 min last reset
U L3-L1 min

7
3 1 I L1 Present current
I L2
I L3
2I L1 mean Average current in relation to
I L2 mean the programmed integration time
I L3 mean
3I L1 max Maximum current (measured)
I L2 max since last reset
I L3 max
4I L1 mean max Maximum current (average)
I L2 mean max since last reset
I L3 mean max
4f L1 Mains frequency of the displayed phase
f L2
f L3
5 1 P L1 Present value of active power
P L2
P L3
2P L1 mean Average active power in relation to
P L2 mean the programmed integration time
P L3 mean
3P L1 max Maximum active power (measured)
P L2 max since last reset
P L3 max
6 1 Q L1 Present value of reactive power
Q L2
Q L3
2Q L1 mean Average reactive power in relation to
Q L2 mean the programmed integration time
Q L3 mean
3Q L1 max Maximum active power (measured)
Q L2 max since last reset
Q L3 max
7cos f L1 Power factor
cos fL2
cos f L3
8 1 P sum Total active power (L1, L2, L3)
Q sum Total reactive power (L1, L2, L3)
cos f sum Power factor of the entire network (L1, L2, L3)
2P mean sum Average total active power
Q mean sum Average total reactive power
cos f mean sum Average power factor of the entire network
3.3 Additional display
The additional displays can be accessed via the T4 (EIN) key.
The additional parameters displayed are: operating time in h, received active energy in Wh, kWh,
or MWh and inductive reactive energy in varh, kvarh or Mvarh.

8
Display parameters of the additional display:
_________________________________________________________
Display Display Description
selection
T4 (EIN)
_________________________________________________________
1hoperating time
2Wh active energy, received
3varh reactive energy, inductive
4display OFF
4. Setup
4.1 General notes
When using the multifunction meter for the first time in a specific environment the MFA 2001 needs
to be adapted to the attached periphery using the setup mode.
To activate setup mode press both the T1 and T2 key simultaneously for at least 3 seconds.
The MFA 2001 always starts in setup mode with the setup option
ƒSetup of the voltage transformer translation ratio („V, V, ADJUST…)
The T2 ( ‚ ) key can be used to proceed through the selection in the following order:
ƒSetup of the current transformer translation ratio („A, A, ADJUST…)
ƒSelection of the integration time to calculate average values („sec…)
ƒSelection of all criteria for limit value 1 („LIMIT 1 ADJUST…)
ƒSelection of all criteria for limit value 2 („LIMIT 2 ADJUST…)
ƒDelete and reset functions („LOE ADJUST…)
ƒPassword („PAS ADJUST…)
ƒRS 485 alt. Profibus DP („OP1 ADJUST…), option 1
ƒAnalogue output („OP2 ADJUST…), option 2
The displayed setup option is activated by pressing the T3 (OPT).
Press the T3 (OPT) key again to exit the setup menu.
It is possible to exit setup mode at any point by pressing the T4 key.
Any changes made up to that point are saved.

9
4.2 Possible parameters and factory presets
Description Adjustment range Factory presets
Primary voltage transformer
Identification plate, 400 V AC 1 V ... 999 kV 400 V
Identification plate, 110 V AC 1 V ... 999 kV 400 V
Secondary voltage transformer
Identification plate, 400 V AC 400 V, 110 V, 100 V400 V
Identification plate, 110 V AC 400 V, 110 V, 100 V400 V
Primary current transformer
Identification plate, 1 A1 A ... 999 kA 5 A
Identification plate, 5 A1 A ... 999 kA 5 A
Secondary current transformer
Identification plate, 1 A1 A, 5 A5 A
Identification plate, 5 A1 A, 5 A5 A
Integration time 5; 10; ... 870; 900 sec 900 sec
Switching output 1 (LIMIT 1)
Measured value U, I, f, P, Q, cos f,
Psum, Qsum, cos fsum,Wh, varh, h,
Channel L1-N, L2-N, L3-N, L1-L2, L2-L3, L3-L1
L1-N/L2-N/L3-N, L1-L2/L2-L3/L3-L1
Response time 0 ... 60 sec
Limit value freely programmable
Alarm type min, max
Deactivation„AUS“
Switching output 2 (LIMIT 2)
Measured value U, I, f, P, Q, cos f ,
Psum, Qsum, cos fsum,Wh, varh, h,
Channel L1-N, L2-N, L3-N, L1-L2, L2-L3, L3-L1
L1-N/L2-N/L3-N, L1-L2/L2-L3/L3-L1
Response time 0 ... 60 sec
Limit value freely programmable
Alarm type min, max
Deactivation „AUS“
Impulse output (optional)
Energy type active energy Wh active energy Wh
Energy flow direction received received
Impulse rate 1Wh ... 999 kWh / Impulse 100 Wh / Impulse
Delete functions Umin, Imax, Imean max, Pmax, Qmax, h,
Wh, varh, ALL
User password „000“ = no password
RS 485 (optional)
Baud rate 9.6 kBaud
Address
000 ... 999
9.6 ... 57.6 kBaud
0 ... 31 0

10
Profibus DP (optional)
Baud rate fixed setting 38.4 kBaud
Address 1 ... 125 1
Analogue output (optional)
Output 0 ... 20 mA, 4 ...20 mA
Measured value U, I, f, P, Q, cos †, Psum, Qsum,cos †sum
Channel L1-N, L2-N, L3-N, L1-L2, L2-L3, L3-L1
Initial source value freely programmable
Final source value freely programmable
Deactivation „AUS…
4.3 Setting the voltage transformer translation ratio
General notes:
The factory setting for the voltage transformer translation ratio is set to 400/400 V.
The preset voltage transformer translation ratio must be changed only if a voltage transformer is
used.
Setup:
In order to change the displayed setup option („V, V, ADJUST…) press the T3 (OPT) key.
The preset setting „400V, 400V… (1:1) is displayed with the first digit of the primary value flashing.
With the T1 ( ‡ ) key the value can be increased starting at …0ˆ through to …9ˆ. To access a lower
value press the T1 ( ‡ ) key past …9ˆ to start again with …0ˆ.
Press the T2 ( ‚ ) key to access the next digit. The digit starts flashing. To change the value press
T1 ( ‡ ) key.
After setting the last digit the decimal point starts flashing and can now be moved by pressing the
T1 ( ‡ ) key. For primary voltages above 1 kV the display can be changed over from …Vˆ to …kVˆ. As
a result the primary voltage can be set to a minimum value of 1 V and a maximum value of 999 kV.
By pressing the T2 ( ‚ ) key the setting for the primary voltage is stored and the menu for selecting
the secondary voltage is displayed. By pressing the T1 ( ‡ ) key values of 400 V, 110 V or 100 V
can be selected.
By pressing the T2 ( ‚ ) key the complete process of setting the primary and secondary voltages
can be repeated.
The process is completed by pressing T3 (OPT) key. The setup menu is displayed.
4.4 Setting the current transformer translation ratio
General notes:
The secondary value of the connected current transformer must match the value displayed on the
identification plate of the MFA 2001.
As standard a choice of 1 A or 5 A is available ex factory.
Setup:
Proceed to setting the current transformer parameters („A, A, ADJUST…) by pressing the T2 ( ‚ )
key. Activate the selection by pressing the T3 (OPT) key.
The value …5A, 5Aˆ (1:1) is displayed with the first digit of the primary value flashing. By using the
T1 ( ‡ ) key the value can be increased starting at …0ˆ through to …9ˆ. To access a lower value press
the T1 ( ‡ ) key past …9ˆ to start again with …0ˆ.

11
Press the T2 ( ‚ ) key to access the next digit. The digit starts flashing. To change the value press
T1 ( ‡ ) key.
After setting the last digit the decimal point starts flashing and can now be moved by pressing the
T1 ( ‡ ) key. For primary currents above 1 kA the display can be changed over from …Aˆ to …kAˆ. As
a result the primary current can be set to a minimum value of 1 A and a maximum value of 999 kA.
By pressing the T2 ( ‚ ) key the setting for the primary current is stored and the menu for selecting
the secondary current is displayed. By pressing the T1 ( ‡ ) key values of 1 A or 5 A can be
selected.
By pressing the T2 ( ‚ ) key the complete process of setting the primary and secondary currents
can be repeated.
The process is completed by pressing T3 (OPT) key. The setup menu is displayed.
4.5 Setting the integration time (bimetal function)
General notes:
An average value is calculated using the measured values for current and power. A shared value
for the time interval used for the calculation can be set.
Factory preset: 900 seconds
Setup:
Activate the setup menu by pressing the T3 key (OPT).
By pressing either the T1 ( ‡ ) or T2 ( ‚ ) keys a value {5; 10; 15; 20; ... 900 sec} can be selected
from the list of available values.
Exit by pressing T3 (OPT).
4.6 Setting the limit values
General notes:
The MFA 2001 is shipped with two outputs. Each of the two outputs can optionally be used as
switched output or impulse output.
Switched output:
Two limit values (LIMIT 1, LIMIT 2) can be defined for each network parameter which lead to the
triggering of the alarm signal if the measured value either exceeds or falls below the set limits
(depending on the settings).
The status of the switched outputs is indicated by the symbols …LIMIT 1ˆ and …LIMIT 2ˆ on the LC
screen.
If any values are set for a specific switched output this symbol appears in the display in the
corresponding display window, like e.g. 3x voltage L-N.
If the threshold monitoring responds and an alarm is triggered, the corresponding display starts
flashing. The flashing symbol now appears in every display window in order to ensure that
exceeding the voltage limit is also indicated in other display windows (e.g. 3x current).

12
Connection example:
Impulse output:
If the switched output is programmed to function as an impulse output a chain of impulses with an
impulse ratio proportional to the active energy is transmitted to the output.
An impulse valency (Wh / impulse) can be assigned to the impulse output. The system calculates
an optimum time period to then collect the impulses within this time period and transmits them with
an impulse length of 75 ms to the output. The maximum frequency is 6,5 Hz. The impulse intervals
are variable depending on the output frequency and are not proportional to the power.
If the measured active energy exceeds the set impulse valency and therefore the maximum
frequency for the impulse output is exceeded, the remaining impulses are stored temporarily and
sent to the output later.
The active energy counter uses a reflux lock to ensure that impulses are only transmitted when
electric energy is received.
Connection example:

13
Switched output setup:
1. Press the T3 (OPT) key to activate the setup mode („LIMIT 1 ADJUST…).
2. Press the T1 ( ‡ ) or T2 ( ‚ ) keys to set the parameters to be monitored.
The following parameters can be selected:
Voltage U „V…
Current I „A…
Frequency f„Hz…
Active power P, received „W…
Reactive power Q, inductive „var…
Power factor, inductive /value/„cos †…
Accumulated values „sum… T3‰ Accumulated active power „W sum…
Accumulated reactive power „var sum…
Power factor entire network „cos † sum…
Active energy „Wh…
Reactive energy „varh…
Operating time „h…
Additional options:
Impulse counter function „PUL… see below ŠSetup as impulse output•
Deactivation „AUS… see below ŠDeactivating the limit output•
After the selection has been made press the T3 (OPT) key to proceed to the next step.
3. Press the T1 ( ‡ ) or T2 ( ‚ ) keys to select the phase (channel) of the network parameter to be
monitored.
The following options are available:
for voltage L1-N
L2-N
L3-N
L1-L2
L2-L3
L3-L1
for voltage (3-phase monitoring) L1-N, L2-N, L3-N
L1-L2, L2-L3, L3-L1
for current, frequency, power, power factor L1
L2
L3
for accumulated active power, accumulated reactive no selection (phase-independent)
power, power factor entire network, active energy,
reactive energy, operating time
After the selection has been made press the T3 (OPT) key to proceed to the next step.
4. Setting the response time. The response time is the time interval during which the limit value is
exceeded (resp. fallen below) in order to trigger an alarm.
Use the T1 ( ‡ ) or T2 ( ‚ ) keys to set the response time.
Adjustment range: 0....60 seconds
After the response time has been selected press the T3 (OPT) key to proceed to the next step.
The response time also applies if the switched output is reset because the programmed value has
been fallen below (resp. exceeded).

14
5. Setting the response value. A preset value relevant to the selection of parameters and phases
is displayed with the first digit flashing.
With the T1 ( ‡ ) key the value can be increased starting at …0ˆ through to …9ˆ. To access a lower
value press the T1 ( ‡ ) key past …9ˆ to start again with …0ˆ.
Press the T2 ( ‚ ) key to access the next digit. The digit starts flashing. To change the value press
T1 ( ‡ ) key.
After setting the last digit the decimal point starts flashing and can now be moved by pressing the
T1 ( ‡ ) key. Also the measuring range …kˆ can be selected or changed to …Mˆ where required.
6. Press the T2 ( ‚ ) key again and the …minˆ display starts flashing.
„min…: Alarm is triggered when falling below the set value
„max…: Alarm is triggered when exceeding the set value
Press the T1 ( ‡ ) key to select „min… or „max….
By pressing the T2 ( ‚ ) key the complete process of setting response value can be repeated.
The process is completed by pressing T3 (OPT) key. The setup menu is displayed.
Setup as impulse output:
The impulse valancy specified in Wh/impulse or kWh/impulse.
Impulse valancy = energy per impulse
Due to technical reasons the denomination “Wh” appears at the bottom of the display. If the range “kWh” is selected the
“k” apears apart from the “Wh” right hand from the impulse valency to be set.
1. Select and activate the impulse counter function (see 2. above) by pressing T3 (OPT).
2. Setting the impulse rate. A preset value relevant to the impulse rate is displayed with the first
digit flashing.
With the T1 ( ‡ ) key the value can be increased starting at …0ˆ through to …9ˆ. To access a lower
value press the T1 ( ‡ ) key past …9ˆ to start again with …0ˆ.
Press the T2 ( ‚ ) key to access the next digit. The digit starts flashing. To change the value press
T1 ( ‡ ) key.
After setting the last digit the decimal point starts flashing and can now be moved by pressing the
T1 ( ‡ ) key. Also the measuring range …kˆ can be selected where required.
The process is completed by pressing T3 (OPT) key. The setup menu is displayed.
Deactivating the limit value output
The limit output can also be deactivated.
1. Select deactivation and activation of the limit output (see 2. above) by pressing T3 (OPT).
2. LIMIT 1 AUS ADJUST
is displayed with …AUSˆ flashing.
3. By pressing T3 (OPT) key the limit output is deactivated and the setup menu is displayed.
The parameters for limit value 2 (LIMIT 2) are set the same way.

15
For your attention !
‹ For the switched output the latest set values for LIMIT 1 and LIMIT 2 are used. For better support
we recommend to keep written protocol about settings and changes!
‹ It is possible to set either outputs LIMIT 1 or LIMIT 2 the impulse counter function. However, the
impulse rate must be identical for both the outputs.
Setting different impulse valancies for the limit outputs is not possible.
4.7 Deleting and resetting
General notes:
The following values stored by the MFA 2001 can be deleted:
Description Display Memory Type
_____________________________________________________________________________
Minimum voltage Umin min V
Maximum measured current Imax max A
Maximum average current Imean max mean max A
Maximum active power Pmax max W
Maximum reactive power Qmax max var
Operating time hflash
Active energy Wh flash
Reactive energy varh flash
Delete all
The parameters seen above can be deleted individually.
There is also the possibility to delete or reset all parameters together at the same time.
Deleting individual parameters:
1. Press the T3 (OPT) key to activate the setup mode („LOE ADJUST…).
2. Press the T1 ( ‡ ) or T2 ( ‚ ) keys to navigate within the menu (see table above).
3. Activate the desired option by pressing T3 (OPT)
Press the T1 ( ‡ ) or T2 ( ‚ ) keys to select further phase dependent parameters
4. Confirm the parameter to be deleted by pressing the T3 (OPT) key.
HAL appears flashing in the display.
Use the T1 ( ‡ ) or T2 ( ‚ ) keys to change from HAL to LOE.
HAL: delete nothing (hold)
LOE: delete
5. Press T3 (OPT) again.
The selected command is executed.
The selection menu LOE ADJUST is displayed.
6. Repeat the process to delete any other individual parameters by pressing T3 (OPT) key.
Use the T1 ( ‡ ) or T2 ( ‚ ) keys to proceed to the next option within the selection menu.
Deleting all parameters:
1. Press the T3 (OPT) key to activate the setup mode („LOE ADJUST…).
2. Press the T1 ( ‡ ) or T2 ( ‚ ) keys until …LOEˆ and …Allˆ is displayed flashing alternately.
3. Press the T3 (OPT) key

16
Display ALL
HAL flashing
Use the T1 ( ‡ ) or T2 ( ‚ ) keys to change from HAL to LOE.
HAL: delete nothing (hold)
LOE: delete
4. Press T3 (OPT) again.
The selected command is executed
The selection menu LOE ADJUST is displayed.
5. Use the T1 ( ‡ ) or T2 ( ‚ ) keys to proceed to the next option within the selection menu.
For your attention !
The parameters stored in the flash memory (operating time, active energy, reactive energy) are
retained when the operating power is switched off.
However, the values for Umin, Imax, Imean max, Pmax, Qmax are deleted automatically when the device
is switched off.
4.8 Setting the password
General notes:
The multifunction meter can be protected against unintentional changes by setting a 3-digit
password. By using the password unwanted programming access can also be prevented.
If the 3-digit numerical password is set the setup mode can only be accessed when the password
is entered and confirmed by pressing the T3 (OPT) key. If the password is correct the setup menu
is displayed.
If the password is incorrect the device returns to display mode.
The factory preset is …000ˆ. If the password is set to …000ˆ the MFA 2001 does not request a
password and jumps directly to the setup menu.
For your attention !
If the user password is lost (except …000ˆ) the device can only be reset by the manufacturer.
Setup:
Activate the setup menu („PAS ADJUST…) by pressing the T3 key (OPT).
The setting „000.… is displayed with the first digit flashing.
With the T1 ( ‡ ) key the value can be increased starting at …0ˆ through to …9ˆ. To access a lower
value press the T1 ( ‡ ) key past …9ˆ to start again with …0ˆ.
Press the T2 ( ‚ ) key to access the next digit. The digit starts flashing. To change the value press
T1 ( ‡ ) key.
The process is completed by pressing T3 (OPT) key. The setup menu is displayed.
Store the set parameters in the flash memory by pressing T4 and exit setup mode.
4.9 RS 485 settings (optional)
General notes: The device can optionally be equipped with anRS-485 interface which makes it
possible to receive and display the data with a PC (e.g. by using an RS 485 to RS 232 converter)
The necessary software is shipped together with the RS 485 option.

17
Setup:
Press the T3 (OPT) key to activate the setup menu („OP1 ADJUST…).
Press the T1 ( ‡ ) or T2 ( ‚ ) keys to set the baud rate.
The following baud rates can be selected:
{ 9.6; 19.2; 38.4; 57.6 } kBaud
Press the T3 (OPT) key.
Press the T1 ( ‡ ) or T2 ( ‚ ) keys to set the address.
Address values from 0 ... 31 can be selected.
Exit the setup menu by pressing T3 (OPT).
4.10 Profibus DP V0 settings (optional)
General notes:
The device can optionally be shipped with a Profibus DP V0 interface.
A detailed description of the instruction set is shipped together with the Profibus DP V0 option.
Setup:
Press the T3 (OPT) key to activate the setup menu („OP1 ADJUST).
Baud rate:
Die baud rate is preset to 38.4 kBaud and can not be changed.
Press the T3 (OPT) key.
Press the T1 ( ‡ ) or T2 ( ‚ ) keys to set the address.
Address values from 1 ... 125 can be selected.
Exit the setup menu by pressing T3 (OPT).
In order to activate the address changes the device has to be turned off and then on again after
the setup is completed. After the restart the changed address is activated.
For your attention !
‹ It is not possible to equip the MFA 2001 with both the RS 485 (4.9) and the Profibus DP V0
(4.10) option at the same time. The device is shipped only with either one option.
‹ The RS 485 option or the Profibus DP V0 option is automatically detected by the device.
4.11 Setting the analogue output (optional)
General notes:
The multifunction meter can optionally be equipped with an analogue interface. The device can be
set for values from 0 ... 20 mA or from 4 ... 20 mA. The analogue signal is galvanically separated
from the inner circuitry. No external power source is needed.
Setup:
1. Press the T3 (OPT) key to activate the setup menu („OP2 ADJUST…).
2. Press the T1 ( ‡ ) or T2 ( ‚ ) keys to set the desired type of analogue output signal.
The following two choices are available:
0 ... 20 mA or 4 ... 20 mA.

18
Press the T3 (OPT) key.
3. Press the T1 ( ‡ ) or T2 ( ‚ ) keys to set the desired parameters for the analogue output
signal.
The following parameters can be selected:
Voltage U „V…
Current I „A…
Frequency f„Hz…
Active power P, received „W…
Reactive power Q, inductive „var…
Power factor, inductive /value/ „cos †…
Accumulated values „sum… T3‰ Accumulated active power „W sum…
Accumulated reactive power „var sum…
Power factor entire network „cos † sum…
Additional option:
Deactivation „AUS… see below ŠDeactivation of the analogue output•
After the selection has been made press the T3 (OPT) key to proceed to the next step.
4. Press the T1 ( ‡ ) or T2 ( ‚ ) keys to select the phase (channel).
The following options are available:
for voltage L1-N
L2-N
L3-N
L1-L2
L2-L3
L3-L1
for current, frequency, power, power factor L1
L2
L3
for accumulated active power, accumulated reactive no selection (phase-independent)
power, power factor entire network
After the selection has been made press the T3 (OPT) key to proceed to the next step.
5. Setting the start value (additional display: “min”). A preset value relevant to the selection of
parameters and phases is displayed with the first digit flashing.
With the T1 ( ‡ ) key the value can be increased starting at …0ˆ through to …9ˆ. To access a lower
value press the T1 ( ‡ ) key past …9ˆ to start again with …0ˆ.
Press the T2 ( ‚ ) key to access the next digit. The digit starts flashing. To change the value press
T1 ( ‡ ) key.
After setting the last digit the decimal point starts flashing and can now be moved by pressing the
T1 ( ‡ ) key. Also the measuring range …kˆ can be selected where required.
By pressing the T2 ( ‚ ) key the complete process of setting start value can be repeated.
Press T3 (OPT) to proceed.
6. Setting the final value (additional display: „max“). A preset value relevant to the selection of
parameters and phases is displayed with the first digit flashing.

19
With the T1 ( ‡ ) key the value can be increased starting at …0ˆ through to …9ˆ. To access a lower
value press the T1 ( ‡ ) key past …9ˆ to start again with …0ˆ.
Press the T2 ( ‚ ) key to access the next digit. The digit starts flashing. To change the value press
T1 ( ‡ ) key.
After setting the last digit the decimal point starts flashing and can now be moved by pressing the
T1 ( ‡ ) key. Also the measuring range …kˆ can be selected where required.
By pressing the T2 ( ‚ ) key the complete process of setting the final value can be repeated.
7. Press T3 (OPT) to exit the setup menu.
Deactivation of the analogue output
The analogue output can also be deactivated.
1. Select deactivation (see 3. above) and activation of the analogue output by pressing T3 (OPT).
2. OP2 AUS ADJUST
is displayed with „AUS… and „OP2… flashing alternately.
3. By pressing T3 (OPT) key the analogue output is deactivated and the setup menu is displayed.
Store the set parameters in the flash memory by pressing T4 and exit setup mode.

20
5Terminal configuration
Auxiliary power source (see
identification plate):
230 V AC, 45 ... 65 Hz
-15% / +20%, max. 16 VA
alternatively
24 V DC,
± 15 %, max. 7 VA