Orbit Merret OM 402PWR User manual

OM 402PWR
4 DIGIT PROGRAMMABLE
UNIVERSAL WATTMETER
AC VOLTMETER/AMMETER
NETS ANALYSER
WATTMETERS
GUARANTEE
YEARS
TECHDOK - OM 402PWR - 2013 - 3v1 - en

2| INSTRUCTIONS FOR USE OM 402PWR
SAFETY INSTRUCTIONS
Please, read the enclosed safety instructions carefully and observe them!
These instruments should be safeguarded by isolated or common fuses (breakers)!
For safety information the EN 61 010-1 + A2 standard must be observed.
This instrument is not explosion-safe!
TECHNICAL DATA
Measuring instruments of the OM 402 series conform to the European regulation 89/336/EWG.
The instruments are up to the following European standards:
EN 55 022, class B
EN 61000-4-2, -4, -5, -6, -8, -9, -10, -11
Seismic capacity:
IEC 980: 1993, čl. 6
The instruments are applicable for unlimited use in agricultural and industrial areas.
CONNECTION
Supply of energy from the main line has to be isolated from the measuring leads.
ORBIT MERRET, spol. sr.o.
Vodnanska 675/30
19800 Prague 9
Czech Republic
Tel: +420 - 281040200
Fax: +420 - 281040299
e-mail: [email protected]
www.orbit.merret.eu

INSTRUCTIONS FOR USE OM 402PWR | 3
1.CONTENTS
1. CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. INSTRUMENT DESCRIPTION . . . . . . . . . . . . . . . . . . . 4
3. INSTRUMENT CONNECTION. . . . . . . . . . . . . . . . . . . . 6
Measuring ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Termination of RS 485 communication line . . . . . . . . 6
Instrument connection . . . . . . . . . . . . . . . . . . . . . . . . . 7
Recommended connection of sensors . . . . . . . . . . . 8
4. INSTRUMENT SETTING . . . . . . . . . . . . . . . . . . . . . . 10
Symbols used in the instructions . . . . . . . . . . . . . . . 12
Setting the DP and the (-) sign . . . . . . . . . . . . . . . . . 12
Control keys function . . . . . . . . . . . . . . . . . . . . . . . . . 13
Setting/permitting items into “USER” menu . . . . . . . 13
5. SETTING “LIGHT” MENU . . . . . . . . . . . . . . . . . . . . . .14
5.0 Description “LIGHT” menu . . . . . . . . . . . . . . . . . . . 14
Access to menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Setting current value. . . . . . . . . . . . . . . . . . . . . . . . . . 16
Setting „Channel I“ - Current . . . . . . . . . . . . . . . . . . . 18
Setting „Channel U“ - Voltage. . . . . . . . . . . . . . . . . . . 19
Setting „Channel P“ - Power. . . . . . . . . . . . . . . . . . . . 21
Setting mathematic functions . . . . . . . . . . . . . . . . . .22
Setting Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Setting analog output . . . . . . . . . . . . . . . . . . . . . . . . .26
Selection of programming menu „LIGHT“/„PROFI“ . .28
Restoration of manufacture setting . . . . . . . . . . . . .28
Selection of instrument menu language version . .29
Setting new access password . . . . . . . . . . . . . . . . .30
Instrument identification . . . . . . . . . . . . . . . . . . . . . . .30
6. SETTING “PROFI” MENU . . . . . . . . . . . . . . . . . . . . . 32
6.0 Description of “PROFI” menu . . . . . . . . . . . . . . . . . 32
6.1 “PROFI” menu - INPUT
6.1.1 Resetting internal values. . . . . . . . . . . . . . . . . 34
6.1.2 Setting measuring type, range, mode, rate .35
6.1.3 Setting the Real Time . . . . . . . . . . . . . . . . . . . 37
6.1.4 External input function selection . . . . . . . . . .38
6.1.5 Optional accessory functions of the keys . . 40
6.2 “PROFI” menu - CHANNEL
6.2.1 Setting „Channel I“ - Current . . . . . . . . . . . . . . 46
6.2.2 Setting „Channel U“ - Voltage . . . . . . . . . . . . .50
6.2.3 Setting „Channel P“ - Power . . . . . . . . . . . . . .50
6.2.4 Setting „Channel I“ - Frequency . . . . . . . . . . . 51
6.2.5 Setting mathematic functions . . . . . . . . . . . .52
6.2.6 Selection of evaluation of min/max. value . . 57
6.3 “PROFI” menu - OUTPUTS
6.3.1 Setting data logging into memory . . . . . . . . .58
6.3.2 Configuration and setting the limits. . . . . . . .60
6.3.3 Setting data output . . . . . . . . . . . . . . . . . . . . . 64
6.3.4 Setting analog output . . . . . . . . . . . . . . . . . . .65
6.3.5 Setting display brightness . . . . . . . . . . . . . . . 67
6.4 “PROFI” menu - SERVICE
6.4.1 Selection of programming menu
„LIGHT“/„PROFI“ . . . . . . . . . . . . . . . . . . . . . . . .68
6.4.2 Restoration of manufacture setting. . . . . . . . 69
6.4.3 Selection of inst. menu language version. . . 70
6.4.4 Setting new access password . . . . . . . . . . . 70
6.4.5 Instrument identification . . . . . . . . . . . . . . . . . 70
7. SETTING “USER” MENU. . . . . . . . . . . . . . . . . . . . . . 72
8. DATA PROTOCOL . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
9. ERROR STATEMENTS . . . . . . . . . . . . . . . . . . . . . . . . 76
10. TABLE OF SYMBOLS. . . . . . . . . . . . . . . . . . . . . . . . 77
11. TECHNICAL DATA. . . . . . . . . . . . . . . . . . . . . . . . . . . 78
12. INSTRUMENT DIMENSION AND INSTALLATION . . . . 80
13. CERTIFICATE OF WARRANTY. . . . . . . . . . . . . . . . . . .81

4| INSTRUCTIONS FOR USE OM 402PWR
2. INSTRUMENT DESCRIPTION
2.1 DESCRIPTION
The OM 402PWR model is a universal 4-digit panel wattmeter with independent measuring of AC voltage/current, frequency,
power factor and other quantities.
The instrument is based on an 8-bit microcontroller and precise RMS converter, which secures high accuracy, stability and easy
operation of the instrument
PROGRAMMABLE PROJECTION
Measured quantities voltage (VRMS)
current (ARMS)
active power (P)
frequency (Hz)
with calculation idle power (Q)
apparent power (S)
power factor (cos fi)
Measuring range: adjustable as fixed or with automatic change
Setting: manual, it is possible to set arbitrary projection on the display for maximum value of the input signal
in themenu, e.g. input 0...250 V/0...5 A > 0...1.500 kW
Projection: -9999…9999
LINEARIZATION
Linearization by linear interpolation in 45 points/channel (solely via OM Link)
DIGITAL FILTERS
Floating average from 2…30 measurements
Exponen.average from 2…100 measurements
Rounding setting the projection step for display
MATEMATICKÉ FUNKCE
Min/max. value registration of min./max. value reached during measurement
Tare designed to reset display upon non-zero input signal
Peak value the display shows only max. or min. value
Mat. operations polynome, 1/x, logarithm, exponential, power, root, sin x
EXTERNAL CONTROL
Lock control keys blocking
Hold display/instrument blocking
Tare tare activation/resetting tare to zero
Resetting MM resetting min/max value
* only for types DC, PM, DU

INSTRUCTIONS FOR USE OM 402PWR | 5
2.INSTRUMENT DESCRIPTION
2.2 OPERATION
The instrument is set and controlled by five control keys located on the front panel. All programmable settings of the instrument
are performed in three adjusting modes:
LIGHT Simple programming menu
- contains solely items necessary for instrument setting and is protected by optional number code
PROFI Complete programming menu
- contains complete instrument menu and is protected by optional number code
USER User programming menu
- may contain arbitrary items selected from the programming menu (LIGHT/PROFI), which determine
the right (see or change)
- acces without password
All programmable parameters are stored in the EEPROM memory (they hold even after the instrument is switched off).
Complete instrument operation and setting may be performed via OM Link communication interface,
which is a standard equipment of all instruments.
The operation program is freely accessible (www.orbit.merret.eu) and the only requirement is the
purchase of OML cable to connect the instrument to PC. It is manufactured in version RS 232 andUSB and is compatible with
all ORBIT MERRET instruments. Another option for connection is with the aid of data output RS 232 or RS 485 (without the
need of the OML cable).
The program OM LINK in „Basic“ version will enable you to connect one instrument with the option of visualization and archiving
in PC. The OM Link „Standard“ version has no limitation of the number of instruments connected.
2.3 OPTIONS
Comparators are assigned to monitor one, two, three or four limit values with relay output. The user may select limits regime:
LIMIT/DOSING/FROM-TO. The limits have adjustable hysteresis within the full range of the display as well as selectable delay
of the switch-on in the range of 0...99,9 s. Reaching the preset limits is signalled by LED and simultaneously by the switch-on
of the relevant relay.
Data outputs are for their rate and accuracy suitable for transmission of the measured data for further projection or directly
into the control systems. We offer an isolated RS232 and RS485 with the ASCII or DIN MessBus protocol.
Analog outputs will find their place in applications where further evaluating or processing of measured data is required in
external devices. We offer universal analog output with the option of selection of the type of output - voltage/current. The value
of analog output corresponds with the displayed data and its type and range are selectable in Menu.
Measured data record is an internal time control of data collection. It is suitable where it is necessary to register measured
values. Two modes may be used. FAST is designed for fast storage (40 records/s) of all measured values up to 8000 records.
Second mode is RTC, where data record is governed by Real Time with data storage in a selected time segment and cycle. Up to
250 000 values may be stored in the instrument memory. Data transmis sion into PC via serial interface RS232/485 andOM Link.

6| INSTRUCTIONS FOR USE OM 402PWR
INSTRUMENT CONECTION3.
The instrument supply leads should not be in proximity of the incoming low-potential signals.
Contactors, motors with larger input power should not be in proximity of the instrument.
The leads into the instrument input (measured quantity) should be in sufficient distance from all power leads and appliances.
Provided this cannot be secured it is necessary to use shielded leads with connection to ground (bracket E).
The instruments are tested in compliance with standards for use in industrial area, yet we recommend to abide by the above
mentioned principles.
MEASURING RANGES
RANGE INPUT 1  „I“ INPUT 2  „U“ INPUT 3  „U“
K0…60/150/300 mV
P0…1/2,5/5 A
S0…10 V 0…120 V
U0…250 V 0…450 V
Termination of RS 485 communication line
Full Significance Default Recomendation
1-2 connect L+ to (+) source terminalconnected
3-4 termination of line 120 Ohm disconnected connect at the end of line
5-6 connect L- to (-) source terminalconnected do not disconnect
RS 485 line should have a linear structure - wires (ideally shielded and twisted)
should lead from one device to another.
X3 - Termination of commuication line RS 485
X3
153

INSTRUCTIONS FOR USE OM 402PWR | 7
3.INSTRUMENT CONECTION
CDE
14 15 16 17
EXT. 1 EXT. 3 EXT. 2
+
-
54
8910
L
NPOWER SUPPLY
E
123
11 12 13
567
IV V VI
III II I
L4 L3
L2 L1
RxD/L+
TxD/L-
GND
AO-I
AO-U
GND
Input 1 - I
GND
Input 3 - U
GND - U
BA
GND - I
Input 2 - U
Clips GND - U and GND - I have galvanic connection
!
In case of connecting clips GND - U or GND - I to a phase,
on this potential is subsequently the connector OM Link
and secondary inputs.
It is necessary to abide by the precautions of hazardous
contact with active parts of the instrument in compliance
with relevant standards and regulations
!

8| INSTRUCTIONS FOR USE OM 402PWR
INSTRUMENT CONECTION3.
Connection for measuring on one phase
Connection for measuring on three phase
L
N
CDE
14 15 16 17
54
8910
123
11 12 1 3
567
IV V VI
III II I
Input 1 - I
GND
Input 3 - U
GND - U
BA
GND - I
Input 2 - U
LOAD
L1
N
L3
L2
LOAD
CDE
14 15 16 17
54
8910
123
11 12 13
567
IV V VI
III II I
Input 1 - I
GND
Input 3 - U
GND - U
BA
GND - I
Input 2 - U
LOAD
LOAD

INSTRUCTIONS FOR USE OM 402PWR | 9
3.INSTRUMENT CONECTION

10 | INSTRUCTIONS FOR USE OM 402PWR
INSTRUMENT SETTING4.
SETTING
PROFI
For expert users
Complete instrument menu
Access is password protected
Possibility to arrange items of the USER MENU
Tree menu structure
SETTING
LIGHT
For trained users
Only items necessary for instrument setting
Access is password protected
Possibility to arrange items of the USER MENU
Linear menu structure
SETTING
USER
For user operation
Menu items are set by the user (Profi/Light) as per request
Access is not password protected
Optional menu structure either tree (PROFI) or linear (LIGHT)

INSTRUCTIONS FOR USE OM 402PWR | 11
4.INSTRUMENT SETTING
4.1 SETTING
The instrument is set and controlled by five control keys located on the front panel. All programmable settings of the instrument
are performed in three adjusting modes:
LIGHT Simple programming menu
- contains solely items necessary for instrument setting and is protected by optional number code
PROFI Complete programming menu
- contains complete instrument menu and is protected by optional number code
USER User programming menu
- may contain arbitrary items selected from the programming menu (LIGHT/PROFI), which determine
the right (see or change)
- acces without password
All programmable parameters are stored in the EEPROM memory (they hold even after the instrument is switched off).
Complete instrument operation and setting may be performed via OM Link communication interface, which is a standard equip-
ment of all instruments.
The operation program is freely accessible (www.orbit.merret.cz) and the only requirement is the purchase of OML cable to con-
nect the instrument to PC. It is manufactured in version RS 232 and USB and is compatible with all ORBIT MERRET instruments.
Another option for connection is with the aid of data output RS 232 or RS 485 (without the need of the OML cable).
Scheme of processing the measured signal
Input U
Min/Max
Display
Memory
Data
Analog
Relays
Input I Converter FILTER Linearization
Channel I
FILTER Linearization
Channel U
FILTER Linearization
Channel P
FILTER Linearization
Channel F
MAT.FCE. Linearization

12 | INSTRUCTIONS FOR USE OM 402PWR
INSTRUMENT SETTING4.
Setting and controlling the instrument is performed by means of 5 control keys located on the front panel. With the aid of these
keys it is possble to browse through the operation menu and to select and set required values.
Symbols used in the instructions
DEF values preset from manufacture
42symbol indicates a flashing light (symbol)
MIN inverted triangle indicates the item that can be placed in USER menu
CONECT.broken line indicates a dynamic item, i.e. it is displayed only in particular selection/version
after pressing the key the set value will not be stored
after pressing the key the set value will be stored
30
continues on page 30
Setting the decimal point and the minus sign
DECIMAL POINT
Its selection in the menu, upon modification of the number to be adjusted it is performed by the control key with transition
beyond the highest decade, when the decimal point starts flashing . Positioning is performed by /.
THE MINUS SIGN
Setting the minus sign is performed by the key on higher decade. When editing the item substraction must be made from
the current number (e.g..: 013 > , on class 100 > -87)
12 T34M
85.42
Indication of channel (green LED)
I Current
U Voltage
P Power
F Frequency
I
U
P
F
Ralay status (red LED)
ON the digit is lit
OFF the digit is not lit
OFF the digit is flashing
limits withrestriction
(hysteresis, delay)
Function (green LED)
M Min/max. value
T Tare
Measured value (red/green LED)
the last two places may display
measuring units

INSTRUCTIONS FOR USE OM 402PWR | 13
4.INSTRUMENT SETTING
Control keys functions
Setting items into „USER“ menu
• inLIGHT or PROFI menu
• no items permitted in USER menu from manufacture
• on items marked by inverted triangle
NO item will not be displayed in USER menu
YES item will be displayed inUSER menu with the option of setting
SHOW item will be solely displayed in USER menu


--- +NO YES SHOW ---
return to item
legend is flashing - current setting is displayed
KEY MEASUREMENT MENU SETTING NUMBERS/SELECTION
access into USER menu exit menu quit editing
programmable key function back to previous level move to higher decade
programmable key function move to previous item move down
programmable key function move to next item move up
programmable key function confirm selection confirm setting/selection
+numeric value is set to zero
+access into LIGHT/PROFI menu
+direct access into PROFI menu
+configuration of an item for
“USER” menu
+determine the sequence of items in
“USER - LIGHT” menu
USER

14 | INSTRUCTIONS FOR USE OM 402PWR
SETTING LIGHT5.
SETTING
LIGHT
For trained users
Only items necessary for instrument setting
Access is password protected
Possibility to arrange items of the USER MENU
Linear menu structure
PROJECTION OF MEASURING UNITS ON THE DISPLAY
MULTIPLYING CONSTANT
MILI (0,001) WITHOUT (1) KILO (1000)
“CHANNEL I”  CURRENT mA A kA
“CHANNEL U”  VOLTAGE mV V kV
“CHANNEL P”  ACTIVE POWER mW W kW
“CHANNEL FR”  FREQUENCY Hz Hz Hz
“S”  APPARENT POWER mVA VA kVA
“Q”  IDLE POWER mVr VAr kVr
“COS FI”  POWER FACTOR ---

INSTRUCTIONS FOR USE OM 402PWR | 15
SETTING LIGHT 5.
Upon delay exceeding 60 s the programming
mode is automatically discontinued and the
instrument itself restores the measuring mode
!
Option - Analog output
TYP. A.O. MIN A.O. MAX A.O. 10004-20mA
Option - comparator
Identification
New password
IDENT.YES OM 402PWR
PAS.LI.0
Language selection
LANG.ENGL.
142.8 PASSW.0
+
Access password
TYPE
Return to manufacture calibration Return to manufacture setting
RE.CAL.YES RE.SET.
LIM. L.1 20 LIM. L.2 40 LIM. L.3 60 LIM. L.4 80
MENU LIGHT
Menu type
Type of instruments Return to measuring
mode
142.878-001 I.3.U3
SW: version Input
450MAX. U -NULLPREF. U FORM. U 000.o
Projection for “Channel U” Decimal point for “Channel U” Multiplying const for “Channel U”
NO3F.GRID -NULLPREF. M FORM. P 0000
Calculation of 3-phase power Decimal point for “Channel P” Multiplying const for “Channel P”
FIL. PINP. M -NULLPREF. M FORM. M FLOA. P.
Select input for “Mat. funkce” Decimal point for “Mat. funkce” Multiplying const for “Mat. funkce”
5MAX. I -NULLPREF. I FORM. I 00.oo
Projection for “Channel I” Decimal point for “Channel I”Multiplying const for “Channel I”
I R.3MODE I U INP.3MODE U AC.FIL.NO
Range “Channel P” AC filter Range for “Channel U”
Password “0”
Menu LIGHT
USER menu OFF
Setting the items DEF
Preset “POWER”
Preset from manufacture

16 | INSTRUCTIONS FOR USE OM 402PWR
SETTING LIGHT5.
142.8
PASSW. 0 Entering access password
for access into the menu
PASSW.Access into instrument menu
PAS = 0
- access into menu is unrestricted, after releasing
keys you automaticaly move to first item of the
menu
PAS > 0
- access into menu is protected ny number code
Set “Password” = 42 Example
0 1 2 0212
42
22
32MODE I
MODE I Select measuring range of
the instrument
- settting of the input range depends on the ordered
measuring range
DEF = „I R.3“ (range „P“)
MODE I
Menu Range „K“ Range „P“
I R.1 0…60 mV 0…1 A
I R.2 0…150 mV 0…2,5 A
I R.3 0…300 mV 0…5 A
MODE I
Range “I R.2” 0…150 mV Example
I R.1 I R.2 I R.3 

MODE UI R.3 I R.2

INSTRUCTIONS FOR USE OM 402PWR | 17
5.SETTING LIGHT
MODE U U INP.2 U INP.3
MODE U Select measuring range of
the instrument
- setting of the input range depends on the ordered
measuring range
DEF = U INP.3
MODE U
Menu Range „S“ Range „U“
U INP.2 0…10 V 0…250 V
U INP.3 0…120 V 0…450 V
Range 0…250 V Example
AC.FIL.U INP.3 U INP.2


AC.FIL.

YES NO
AC.FIL.Input filter function -
suppressing the DC
component
- allows for measurement solely of the AC
component
DEF = NO
NO Filter is off
- measures both the DC and the AC component
of the input signal
YES Filter is on
- measures solely the AC component of input signal
Measurrement of alternating component onlyy Example
MAX INO YES

18 | INSTRUCTIONS FOR USE OM 402PWR
SETTING PROFI5.
MAX I Setting display projection
for maximum value of input
current
- range of the setting: -999…9999
- position of the DP does not affect display
projection
DEF = 5
PREF. I
PREF. I Select the multiplying
constant
- the constant allows for another mathematical
calculation with the option of extended projection
of measuring units, display projection
DEF = 1 (- NULL)
m-MILI Constant 0,001
prefix “m” added
- NULL Constant 1
without prefix
K-KILO Constant 1000
prefix “K” added
Multiplying constant 1000 > PREF. I = K-KILO Example
-NULL K-KILO FORM. I
m-MILI -NULL K-KILO 

MAX I 

5Setting projection for
maximum input current
Projection for 150 mV > Max = 3500 Example
5 34
00
012
PREF. I
000 300100 200 400
15000500 35002500500

INSTRUCTIONS FOR USE OM 402PWR | 19
5.SETTING LIGHT
MAX U 

450 Setting projection for
maximum input voltage
MAX U Setting display for maximum
value of input voltge
- range of the setting is -999…9999
- position of the DP does not affect display
projection
DEF = 450
Projection for 450 V > MA X U = 1000 Example
450460450
500
490480470
PREF. U
400 100300 200 000
1000
0000
Projection of DP on display > 000.o Example
FORM. I Setting projection of the
decimal point
- positioning of the DP is set here in the measuring
mode
DEF = 00.oo
FORM. I
MAX U00.oo 000.o


0000 000.o 00.oo 0.ooo FLOA. P.

20 | INSTRUCTIONS FOR USE OM 402PWR
SETTING LIGHT5.
FORM. U Setting projection of the
decimal point
- positioning of the DP is set here in the measuring
mode
DEF = 000.o
Projection of DP on display > 0000 Example
FORM. U
3F.GRID000.o 0000


0000 000.o 00.oo 0.ooo FLOA. P.
PREF. U
PREF. U Select multiplying constant
- the constant allows for another mathematical
calculation with the option of extended projection
of measuring units, display projection
DEF = 1 (- NULL)
m-MILI Constant 0,001
prefix “m” added
- NULL Constant 1
without prefix
K-KILO Constant 1000
prefix “K” added
Multiplying constant 1000 > PREF. U = K-KILO Example
-NULL K-KILO FORM. U
m-MILI -BEZ K-KILO 
