Orbit Merret OM 402UNI User manual

OM 402UNI
4 DIGIT PROGRAMMABLE
UNIVERSAL INSTRUMENT
DC VOLTMETER/AMMETER
PROCESS MONITOR
OHMMETER
THERMOMETER FOR PT 100/500/1000
THERMOMETER FOR NI 1000
THERMOMETER FOR THERMOCOUPLES
DISPLAYS FOR LIN. POTENTIOMETERS
GUARANTEE
YEARS
TECHDOK - OM 402UNI_20 - 2013 - 3v0 - en
20 mm

2| INSTRUCTIONS FOR USE OM 402UNI_20
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 61010-1 Electrical safety
EN 61326-1 Electronic measuring, control and laboratory devices – Requirements for EMC “Industrial use”
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.cz

INSTRUCTIONS FOR USE OM 402UNI_20 | 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
Setting input - Type “DC” . . . . . . . . . . . . . . . . . . . . . . 18
Setting input - Type “PM” . . . . . . . . . . . . . . . . . . . . . .20
Setting input - Type “OHM” . . . . . . . . . . . . . . . . . . . . . 22
Setting input - Type “RTD - Pt” . . . . . . . . . . . . . . . . . . 24
Setting input - Type “RTD - Ni” . . . . . . . . . . . . . . . . . . 26
Setting input - Type “T/C” . . . . . . . . . . . . . . . . . . . . . .28
Setting input - Type “DU” . . . . . . . . . . . . . . . . . . . . . .30
Setting input - Type “RTD - Cu” . . . . . . . . . . . . . . . . .32
Setting Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Setting analog output . . . . . . . . . . . . . . . . . . . . . . . . .36
Setting of display colors. . . . . . . . . . . . . . . . . . . . . . .38
Selection of programming menu „LIGHT“/„PROFI“ . .40
Restoration of manufacture setting . . . . . . . . . . . . .40
Calibration - input range (DU). . . . . . . . . . . . . . . . . . . 41
Selection of instrument menu language version . . 42
Setting new access password . . . . . . . . . . . . . . . . . 42
Instrument identification . . . . . . . . . . . . . . . . . . . . . . . 43
6. SETTING “PROFI” MENU . . . . . . . . . . . . . . . . . . . . . 46
6.0 Description of “PROFI” menu . . . . . . . . . . . . . . . . . 46
6.1 “PROFI” menu - INPUT
6.1.1 Resetting internal values. . . . . . . . . . . . . . . . . 48
6.1.2 Setting measuring type, range, mode, rate. . 49
6.1.3 Setting the Real Time . . . . . . . . . . . . . . . . . . .53
6.1.4 External input function selection . . . . . . . . . .53
6.1.5 Optional accessory functions of the keys . . 54
6.2 “PROFI” menu - CHANNEL
6.2.1 Setting measuring parameters (projection, filters,
decimal point, description). . . . . . . . . . . . . . . .58
6.2.2 Setting mathematic functions . . . . . . . . . . . . 61
6.2.3 Selection of evaluation of min/max. value . .63
6.3 “PROFI” menu - OUTPUT
6.3.1 Setting data logging. . . . . . . . . . . . . . . . . . . . . 64
6.3.2 Setting Limits . . . . . . . . . . . . . . . . . . . . . . . . . .66
6.3.3 Setting data output . . . . . . . . . . . . . . . . . . . . . 69
6.3.4 Setting analog output . . . . . . . . . . . . . . . . . . . 70
6.3.5 Selection of display projection and colors . . 72
6.4 “PROFI” menu - SERVICE
6.4.1 Selection of programming menu
„LIGHT“/„PROFI“ . . . . . . . . . . . . . . . . . . . . . . . . 74
6.4.2 Restoration of manufacture setting. . . . . . . . 75
6.4.3 Calibration - input range (DU)). . . . . . . . . . . . . 76
6.4.4 Selection of instrument menu language
version. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
6.4.5 Setting new access password . . . . . . . . . . . 76
6.4.6 Instrument identification . . . . . . . . . . . . . . . . . 77
7. SETTING ITEMS INTO “USER” MENU . . . . . . . . . . . . 78
7.0 Configuration “USER” menu . . . . . . . . . . . . . . . . . . 78
8. METHOD OF MEASURING OF THE COLD JUNCTION . 80
9. ERROR STATEMENTS. . . . . . . . . . . . . . . . . . . . . . . . 81
10. DATA PROTOCOL . . . . . . . . . . . . . . . . . . . . . . . . . . 82
11. TECHNICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . 84
12. INSTRUMENT DIMENSIONS AND INSTALATION . . . . 86
13. CERTIFICATE OF GUARANTEE . . . . . . . . . . . . . . . . ..87

4| INSTRUCTIONS FOR USE OM 402UNI_20
2. INSTRUMENT DESCRIPTION
2.1 DESCRIPTION
The OM 402 model series are 4 digit panel programmable instruments designed for maximum efficiency and user comfort while
maintaining their favourable price. Two models are available: UNI andPWR.
Type OM 402UNI is a multifunction instrument with the option of configuration for 8 various input options, easily configurable in
the instrumentmenu. By further options of input modules it is feasible to measure larger ranges of DC voltage and current or
increase the number of inputs up to 4 (applies for PM).
The instrument is based on an 8-bit microcontroller with a multichannel 24-bit sigma-delta converter, which secures high accu-
racy, stability and easy operation of the instrument.
TYPES AND RANGES
UNI DC: 0…60/150/300/1200 mV
PM: 0…5 mA/0…20 mA/4…20 mA/±2 V/±5 V/±10 V/±40 V
OHM: 0…100 /0…1 k/0…10 k/0…100 k/Autorange
RTD-Pt: Pt 50/100/Pt 500/Pt 1000
RTD-Cu: Cu 50/Cu 100
RTD-Ni: Ni 1000/Ni 10000
T/C: J/K/T/E/B/S/R/N/L
DU: Linear potentiometer (min. 500 )
UNI  A DC: ±0,1 A/±0,25 A/±0,5 A/±2 A/±5 A/±100 V/±250 V/±500 V
UNI  B PM: 3x 0…5 mA/0…20 mA/4…20 mA/±2 V/±5 V/±10 V/±40 V
PROGRAMMABLE PROJECTION
Selection: of type of input and measuring range
Measuring range: adjustable as fixed or with automatic change
Setting: manual, optional projection on the display may be set in the menu for both limit values of the input
signal, e.g. input 0…20 mA> 0…850,0
Projection: -999…9999
COMPENSATION
of conduct: in the menu it is possible to perform compensation for 2-wire connection
of conduct in probe: internal connection (conduct resistance in measuring head)
of CJC (T/C): manual or automatic, in the menu it is possible to perform selection of the type of thermocouple and
compensation of cold junctions, which is adjustable or automatic(temperature at the brackets)
LINEARIZATION
Linearization:* by linear interpolation in50 points (solely via OM Link)
DIGITAL FILTERS
Floating average: from2…30 measurements
Exponen. average: from2…100 measurements
Arithmetic average: from2…100 measurements
Rounding: setting the projection step for display
MATHEMATIC FUCTIONS
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
* only for types DC, PM, DU

INSTRUCTIONS FOR USE OM 402UNI_20 | 5
2.INSTRUMENT DESCRIPTION
EXTERNAL CONTROL
Lock: control keys blocking
Hold: display/instrument blocking
Tare: tare activation/resetting tare to zero
Resetting MM: resetting min/max value
Memory: data storage into instrument memory
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
Excitation is suitable for supplying power to sensors and transmitters. It has a galvanic separation.
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 402UNI_20
3. INSTRUMENT CONECTION
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
TYPE INPUT I INPUT U
DC 0…60/150/300/1 200 mV
PM 0…5/20 mA/4…20 mA ±2/±5/±10/±40 V
OHM 0…100 /1 k/10 k/100 k/Autorange
RTDPt Pt 50/100/Pt 500/ Pt 1 000
RTDCu Cu 50/100
RTDNi Ni 1 000/10 000
T/C J/K/T/E/B/S/R/N/L
DU Linear potentiometer (min. 500 )
OPTION “A”
TYPE INPUT I INPUT U
DC ±0,1 A/±0,25 A/±0,5 to GND (C)
±2 A/±5 A to GND (B) ±100 V/±250 V/±500 V to GND (C)
OPTION “B”
TYPE INPUT 2, 3, 4/I INPUT 2, 3, 4/U
PM 0…5/20 mA/4…20 mA ±2/±5/±10/±40 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 402UNI_20 | 7
3.INSTRUMENT CONECTION
+
+
14 15 16 17 18 19 20 21
EXT. 1
GND
INPUT - I INPUT - U
-
Excitation
EXT. 3 EXT. 2
S+ S- E--E+
ES+
E+ ES- ES--
2322
+
-
5
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
DC, PM
RTD, OHM, Ni
DU
T/C
CEA
CJC
-+
DB
4
E 1 C 2 E 2 C 1
Relays
SSR
Open collectors
Open collectors
C 3
E 4
C 4
E 3
S+
INPUT - I
INPUT - U
GND - U/I0,5
Option A
GND - I5
+
+
-
-
-+
Excitation has the minus pole common with
the input - the bracket no. 20 - GND and
you may set its value by trimmer above the
bracket no. 17
!
!
Maximum of 250 mA may be connected to “INPUT - I” (bracket no. 21) , i.e. 10-times range overload.
Mind the correct connection/mistaking of current - voltage input.
Destruction of measuring resistance in current input (15R) may occur.

8| INSTRUCTIONS FOR USE OM 402UNI_20
3. INSTRUMENT CONECTION
Example connection of a 2-wire sensor with current signal output powered by instrument’s excitation
Example connection of a 3-wire sensor with current signal output powered by instrument’s excitation
+
14 15 16 17 18 19 20 21
INPUT - IExcitation
2322
+
-
LNE
123
+
(+)
(-)
Sensor (-)Sensor (+)
+
14 15 16 17 18 19 20 21
INPUT - I
-
Excitation
2322
+
-
LNE
123
+
Supply (+)
Output (+)
GND (-)
Output (+)Supply (+)

INSTRUCTIONS FOR USE OM 402UNI_20 | 9
INSTRUMENT CONECTION 3.
Example connection of 3-wire sensor with voltage signal output powered by instrument’s excitation
Example connection of resistance measurement using 4 wires
+
14 15 16 17 18 19 20 21
INPUT - U
-
Excitation
2322
+
-
LNE
123
+
Supply (+)
Output (+)
GND (-)
Output (+)Supply (+)
By connecting resistor R* we elimintate error message E. I.Ov. (input overflow) when the measured resistance is disconnected
14 15 16 17 18 19 20 21
E+
2322
+
-
LNE
123
E-S-S+
* resistor 100...1000 Ohm
* *
Terminals
for the measured resistance

10 | INSTRUCTIONS FOR USE OM 402UNI_20
4. INSTRUMENT SETTING
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 402UNI_20 | 11
INSTRUMENT SETTING 4.
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.eu) 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
CHAN. A
FILTER
MAT.FCE.
Relays
Analog
Memory
Min/Max
Data
Linearization
Input
Linearization Display

12 | INSTRUCTIONS FOR USE OM 402UNI_20
4. INSTRUMENT SETTING
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
DC PM
DU OHM RTD T/C Indicates the setting for given type of instrument
DEF values preset from manufacture
42symbol indicates a flashing light (symbol)
MIN inverted triangle indicates the item that can be placed in USER menu
CON.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)
85.42
1
2
T
3
4
M
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
Indication
of measured input
input numbe
r
(only for option “A”)
A
B
C
D
(orange LED)
(red/green/orange LED)

INSTRUCTIONS FOR USE OM 402UNI_20 | 13
INSTRUMENT SETTING 6.
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
USER


--- +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

14 | INSTRUCTIONS FOR USE OM 402UNI_20
5. SETTING LIGHT
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

INSTRUCTIONS FOR USE OM 402UNI_20 | 15
SETTING LIGHT 5.
Option - Analog output
TY.A.O. MI.A.O. MA.A.O. 10004-20mA
Option - comparator
Calibration - only for “DU”
Identication
New password
IDEN.YES OM 402UNI20
PA.LI .0
C. MI.YES C. MA.YES
DU
Language selection
LANG.ENGL.
142.8 PASS.0
+
Access password
2-W.CON.000.oFOR.A
OHMRTD
EXT.1CON.23C. J.T. FOR.A 0000
Selecting projection
and connection
T/C
0MIN.A 100MAX.A FOR.A 000.o
PMDC DUOHM
L. L.1 20 L. L.2 40 L. L.3 60 L. L.4 80
TYPE
Return to manufacture calibration Return to manufacture setting
RE.CA.YES RE.SE.MENU LI G H .
Menu type
Type of instruments Return to measuring
mode
142.878-001 PM
SW: version Input
Type of instruments
PMTYPE
Measuring range
4-20mAMODE
Co. O GRE.D. L.1 333.3 Co. 1 RED D. L.2 666.7
First color’s limit Color after rst limit
Basic color Second color’s limit
Co. 2 ORA.
Color after second limit
Upon delay exceeding 60 s the programming
mode is automatically discontinued and the
instrument itself restores the measuring mode
!
Password “0”
Menu LIGHT
USER menu off
Setting the items DEF
Preset from manufacture

16 | INSTRUCTIONS FOR USE OM 402UNI_20
5. SETTING LIGHT
142.8
PASS. 0 Entering access password
for access into the menu
PASS.Access into instrument menu
PASS. = 0
- access into menu is unrestricted, after releasing
keys you automaticaly move to first item of the
menu
PASS. > 0
- access into menu is protected ny number code
Ser „PASS.“=42 Example
0 1 2 0212
42
22
32TYPE
TYPE Selection of the type of
instrument
- primary selection of the type of instrument
- performs default setting DEF of values from
manufacture, incl. calibration
- DEF = „PM“
TYPE
Menu Type of instrument
DC DC voltmeter
PM Process monitor
OHM Ohmmeter
Pt Thermometer for sensors Pt
Ni Thermometer for sensors Ni
TC Thermometer for thermocouples
DU Display for lin. potentiometer
Cu Thermometer for sensors Cu
TYPE
Type “PM” Example


DC PM OHM Pt Ni TC
DU
MODEPM
Cu
Type DC 18
Type PM 20
Type OHM 22
Type RTD-Pt 24
Type RTD-Ni 26
Type T/C 28
Type DU 30
Type RTD-Cu 32
+

INSTRUCTIONS FOR USE OM 402UNI_20 | 17
SETTING LIGHT 5.

18 | INSTRUCTIONS FOR USE OM 402UNI_20
SETTING LIGHT5.
MEASURING MODE > DC
MIN.A 
Setting display projection for
minimum value of input signal
- range of the setting: -999…9999
- position of the DP does not affect display
projection
- the DP is automatically shifted after the value is
confirmed
DEF = 0
MODE Selection of the instrument
measuring range
DEF = 60 mV
DEF = 500 V*
* only for option “A”
MODE
Menu Measuring range
60 ±60 mV
150 ±150 mV
300 ±300 mV
1200 ±1,2 V
MODE  A
100 ±100 V
250 ±250 V
500 ±500 V
0.10 ±0,1 A
0.25 ±0,25 A
0.50 ±0,5 A
1.00 ±1 A
5.00 ±5 A
Projection for 0 mV > MIN.A = 0 Example


0Setting for minimum
input signal
MIN.A
0MAX.A
MODE 60 150 300 1200
Range ±150 mV Example
60 150 MIN.A



INSTRUCTIONS FOR USE OM 402UNI_20 | 19
FOR.A Setting projection of the
decimal point
- positioning of the DP is set here in the measuring
mode
DEF = 000.o
MEASURING MODE > DC
5.SETTING LIGHT


100
MAX.A Setting display projection
for maximum value of input
signal
- range of the setting: -999…9999
- position of the DP does not affect display
projection
- the DP is automatically shifted after the value is
confirmed
DEF = 100
Setting for maximum
input signal
MAX.A
Projection for 150 mV > MAX.A = 3500 Example
100100100
500
400300200
FOR.A0500
Projection of DP on display > 0000 Example
FOR.A
BAR.0 *subsequent item on the menu depends on instrument equipment
0000 000.o 00.oo 0.ooo FL. P.


000.o 0000
35001500 2500
34

20 | INSTRUCTIONS FOR USE OM 402UNI_20
SETTING LIGHT5.
MEASURING MODE > PM


0
MIN.A 
Setting display projection for
minimum value of input signal
- range of the setting: -999…9999
- position of the DP does not affect display
projection
- the DP is automatically shifted after the value is
confirmed
DEF = 0
Setting for minimum input
signal
MIN.A
Projection for 0 mA > MIN.A = -25 Example
0
MAX.A
1
05
5432
-05-5 -15 -25
MODE Selection of the instrument
measuring range
DEF = 4 - 20 mA
MODE
Menu Measuring range
i0-5 0…5 mA
0-20 0…20 mA
4-20 4…20 mA
u0-2 ±2 V
u0-5 ±5 V
0-10 ±10 V
0-40 ±40 V
Er. 4 4…20 mA, with error statement of
„underfl ow“ upon signal smaller
than 3,36 mA


Range 0…20 mA Example
4-20 u0-2 MIN.A
i0-5 0-20 4-20 0-10 0-40 Er. 4
• • •
MODE