Orbit Merret OM 351 Manuale utente

OM 351

3 1/2 DIGIT PROGRAMMABLE

DC VOLTMETER/AMMETER

AC VOLTMETER/AMMETER

PROCESS MONITOR

OHMMETER

THERMOMETER FOR PT 100/500/1 000

THERMOMETER FOR NI 1 000

THERMOMETER FOR THERMOCOUPLES

DISPLAY INST. FOR LINEAR POTENTIOMETERS

GUARANTEE

YERS

2|INSTRUCTIONS FOR USE OM 351

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 351 series conform to the European regulation 89/336/EWG

and the Ordinance 168/1997 Coll.

They are up to the following European standards:

EN 55 022, class B

EN 61000-4-2, -4, -5, -6, -8, -9, -10, -11

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.

Vodňanská 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 351 |3

1. Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2. Instrument description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3. Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4. Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Symbols used in the instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Setting the DP and the (-) sign . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Control keys functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Configuration of user menu items. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

5. Setting “LIGHT” menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

5.0 Description “LIGHT” menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Setting input type “DC”. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Setting input type “AC” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Setting input type “PM”. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Setting input type “DU”. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Setting input type “OHM”. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Setting input type “RTD” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Setting input type “T/C” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Setting the limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Setting the analog output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Setting the menu type (LIGHT/PROFI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Restoration of the manufacture setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Calibration of the input range (DU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Setting new access password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Instrument identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

6. Setting “PROFI” menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

6.0 Description “PROFI” menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

6.1 “PROFI” menu - INPUT

6.1.1 Tare reseting 38

6.1.2 Setting the measuring range, displacement, compensation and measuring rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

6.1.3 Setting the external control input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

6.1.4 Setting functions of the control key (ENTER) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

6.2 “PROFI” menu - CHANNELS

6.2.1 Projection on the display (MIN, MAX) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

6.2.2 Setting the digital filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

6.2.3 Setting the decimal point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

6.3 “PROFI” menu - OUTPUT

6.3.1 Cofiguration and setting the limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

6.3.2 Setting the data output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

6.3.3 Setting the analog output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

6.3.4 Setting the display brightness. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

6.4 “PROFI” menu - SERVICE

6.4.1 Selection of the type of programming menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

6.4.2 Restoration of the manufacture setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

6.4.3 Calibration of the input range (DU). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

6.4.4 Setting new access password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

6.4.5 Instrument identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

7. Setting “USER” menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

7.0 Configuration “USER” menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

8. Method of measuring of the cold junction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

9. Data protocol 57

10. Error statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

11. Technical data60

12. Instrument dimensions and installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

13. Certificate of guarantee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

1CONTENTS

4|INSTRUCTIONS FOR USE OM 351

2.1 description

The OM 351 model series are 3 1/2 digit programmable panel instruments, manufactured in the following alternatives:

OM 351DC DC voltmeter/ammeter

OM 351AC AC voltmeter/ammeter

OM 351PM Process monitor

LÁDÁN

OM 351RTD Thermometer for Pt 100/500/1 000, Ni 1 000

OM 351T/C Thermometer for thermocouples

OM 351DU Display instrument for linear potentiometers

OM 351OHM Ohmmeter

The instruments are based on an 8-bit microcontroller with A/D converter, which secures high accuracy, stability and easy

operation of the instrument.

Programmable projection of the display

Setting selection of measuring range

Calibration projection for both limit values of the input signal

Projection ±1999

Linearisation

Linearisation through linear interpolation in 25 points (only for OM Link)**

Compensation of

Conduct automatic compensation of 2-wire conduct

Probes compensation of internal resistance of the measuring probe

(conduct resistance in the measuring head)

Cold junctions fixed or automatic

Digital filters

Rounding setting the projection step for display

Exponen. average from 2…100 measurements

Mathematic functions

Tare* assigned to reset display in case of non-zero input signal

External control

Hold display/instrument blocking

Lock locking the control keys for access into Configuration menu

Tára* tare activation

* only for types DC, PM, DU **only for types DC, PM, OHM, DU

INSTRUMENT DESCRIPTON2

INSTRUCTIONS FOR USE OM 351 |5

2.2 Operationn

The instrument is set and controlled by five control keys located on the front panel. All programmable settings of the instru-

ment are realized in two adjusting modes:

LIGHT Simple programming menu

- contains only items necessary for instrument setting and is protected by an optional numeral code

PROFI Complete programming menu

- contains complete instrument menu and is protected by an optional numeral code

USER User programmable menu

- may contain arbitrary items selected from programmable menu (LIGHT/PROFI), which determines the

authorization (see or change)

- access is without password

All programmable parameters are stored in the EEPROM memory (they hold even after the instrument is switched off).

Complete operation and setting of the instrument may be performed via communication interface

OM Link, which is a standard equipment of every instrument.

The operation program is freely available (www.orbit.merret.cz) and the only requirement is the

purchase of OML cable for connecting 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 for OML cable).

The OM LINK program version „Standard“ allows you to connect an unlimited number of instruments with the option of

visualizatiion and storage in PC.

2.3 Extension

Excitation is suitable for feeding sensors and converters. It has a galvanic isolation.

Comparators are assigned to control two limit values with relay output. The limits have adjustable hysteresis as well as

selectable delay of the switch-on. 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 measured data for further projection or directly

into the control systems. We offer an isolated RS232 and RS485 with the ASCII protocol.

Analog outputs will find their place in applications where further evaluating or processing of measured data in external

devices is required. We offer a universal analog output with the option of selection of output type - voltage/current. The value

of analog output corresponds with the displayed data and its type and range are selectable in the programming mode.

2INSTRUMENT DESCRIPTON

6|INSTRUCTIONS FOR USE OM 351

The lead for feeding of the instrument should not be in the proximity of incoming low-potential signals.

Contactors, motors with larger input power and other efficient elements should not be in the proximity of the instrument.

The lead into instrument input (the 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 (terminal E).

The instruments are tested in compliance with standards for use in industrial area, yet we recommend to abide by the above

mentioned principles.

S+

E- S- E+

S-

ES+ES-

ES+E-

12 3

POWER SUPPLY

TxD

GND

RxD

Rx/Tx-

Rx/Tx+

GND

232

485

8910

Hold/Lock

INPUT

GND

14 15 1611 12 13

CJC

Hold/Lock

OM 351T/C

OM 351RTD, OHM

4567

Analog output - I

GND

Analog output - U

INSTRUMENT CONNECTION3

Grounding on terminal „E“ has to be connected

at all times.

In case of RTD and OHM inputs with 2- or 3- wire

connection it is necessary to link the unconnected

inputs on the terminal board (13+14/15+16 or

15+16).

INSTRUCTIONS FOR USE OM 351 |7

Analog output - I

GND

Analog output - U

12 3

POWER SUPPLY

TxD

GND

RxD

Rx/Tx-

Rx/Tx+

GND

232

485

8910 14 15 1611 12 13

Hold/Lock/Tare

INPUT 2

INPUT 1

INPUT 3

GND

OM 351DC, PM

OM 351DU

4567

Excitation

Hold/Lock

INPUT 1

INPUT 3

GND

OM 351AC

INPUT 2

MEASURING RANGES

Type/Input Input 1 Input 2 Input 3

OM 351 AC 0…60/150/300 mV 0…10 V 0…120 V

OM 351 AC 0…1 (2,5)/5 A 0…250 V 0…450 V

OM 351 DC ±2/±20 mA ±0,2/±2 V ±20/±200 V

OM 351 DC 0…1/5 A 0…60/150 mV

OM 351 PM 0/4…20 mA 0…2 V 0…5/10 V

OM 351 OHM 0…200 Ohm * 0...2 kOhm * 0...100 kOhm * 5…105 Ohm

3INSTRUMENT CONNECTION

8|INSTRUCTIONS FOR USE OM 351

For trained users

Only items necessary for instrument

setting

Password protected access

Possibility to arrange items of the

„User“ menu

•

For expert users

Complete instrument menu

Access is password protected

Possibility to arrange items of the

„User“ menu

•

SETTING PROFISETTING LIGHT

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)

•

SETTING USER

INSTRUMENT SETTING4

INSTRUCTIONS FOR USE OM 351 |9

4INSTRUMENT SETTING

4.1 Description

The instrument is set and controlled by means of five control keys located on the front panel. All programmable settings of the

instrument are realised in three adjusting modes:

LIGHT Simple programming menu

- contains only items necessary for instrument setting and is protected by an optional numeral code

PROFI Complete programming menu

- contains complete instrument menu and is protected by an optional numeral code

USER User programmable menu

- may contain arbitrary items selected from programmable menu (LIGHT/PROFI), which determines the

authorization (see or change)

- access is without password

Complete operation and setting of the instrument may be performed via communication interface OM Link, which is a

standard equipment of every instrument.

The operation program is freely available (www.orbit.merret.cz) and the only requirement is the purchase of OML cable for

connecting 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 for OML cable).

10 |INSTRUCTIONS FOR USE OM 351

Setting and controlling th 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

OHM

RTD

T/C

Indicates the setting for given type of instrument

DEF values preset from manufacture

42symbol indicates a flashing light (symbol)

MI N inverted triangle indicates the item that can be located into USER menu

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

to 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)

1T2M

143.7

Relay status

ON the digit is lit

OFF the digit is not lit

OFF the digit is flashing

limits with restriction

(delay)

Function

T Tare

Measured value

INSTRUMENT SETTING4

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