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Orbit Merret OM 351 Instructions For Use Manual

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 lin. potentiometers
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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 LIN. POTENTIOMETERS
GUARANTEE
Y
E
R
S
1

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Summary of Contents for Orbit Merret OM 351

  • Page 1 GUARANTEE 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 LIN. POTENTIOMETERS...
  • Page 2 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 and Czech standards:...

  • Page 3: Table Of Contents

    1. CONTENTS CONTENTS Contents ..................3 Instrument description .

  • Page 4: Instrument Description

    INSTRUCIONS FOR USE OM 351 INSTRUMENT DESCRIPTION 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 OM 351RTD Thermometer for Pt 100/500/1 000, Ni 1 000...
  • Page 5 2. INSTRUMENT DESCRIPTION OPERATION The instrument is set and controlled by five control keys located on the front panel. All programmable settings of the instrument are realized in two adjusting modes: Configuration menu (hereinafter referred to as „CM“) is protected by an optional number code and contains complete instrument setting User menu may contain arbitrary programming settings, defined in „CM“...

  • Page 6: Connection

    INSTRUCIONS FOR USE OM 351 CONNECTION The lead for feeding the instrument should not be in the proximity of the incoming low-potential signals. Contactors, motors with larger input power and other efficient elements should not be in the proximity of the instru- ment.
  • Page 7 Input 1 Input 2 Input 3 OM 351 AC Input 1 > 0…60 mV * 0…150 mV * 0…300 mV * 0…1 A * 0…5 A OM 351 AC Input 2 > 0…10 V * 0…100 V * 0…150 V * 0…250 V * 0…450 V OM 351 DC ±2/±20 mA...

  • Page 8: Setting

    INSTRUCIONS FOR USE OM 351 INSTRUMENT SETTING Setting and controlling the instrument is performed through 5 control keys on the front panel. By means of these controls it is possible to browse through the operating program and to select and set the required values.

  • Page 9: Setting The Dp And The (-) Sign

    4. INSTRUMENT SETTING SETTING THE DECIMAL POINT AND THE MINUS SIGN DECIMAL POINT Its selection in calibration modes, upon modification of the number to be adjusted is performed by the control key with transition behind the highest decade, when the decimal point starts flashing. Positioning is performed by Setting the decimal point may be performed correctly with the (+/-) signs being turned off.

  • Page 10: Guide Through Minimum Instrument Setting, Calibration

    INSTRUCIONS FOR USE OM 351 GUIDE THROUGH MINIMUM INSTRUMENT SETTING Access into the „Configuration menu“ Entering the introductory w/o saving access password 0,1,2… Standard manufacture setting of the access password shift left 9,8,7… Selection of the measuring range/input type Setting the instrument...
  • Page 11 4. GUIDE THROUGH MINIMUM INSTRUMENT SETTING Setting projection on the display Setting the display MIN. projection for minimum value of the input signal INP. - range of the setting is ±1999 CHA. Setting the display projection for maximum OUT. FIL. value of the input signal SER.

  • Page 12: User Menu

    INSTRUCIONS FOR USE OM 351 USER MENU • designated for instrument service • may contain setting the limits, analog and data output and brightness, with restriction as per the setting in "Con- figuration mode" 23. 6 INP. Tare resetting INP.

  • Page 13: Setting The Limits

    4. INSTRUMENT SETTING - CONFIGURATION MODE 4.2.2 LIMITS - ENTERING THE VALUES Entering the limit values for status evaluations INP. LIM. Setting for Limit 1 OUT. BRi . HYS. Setting for Limit 2 Ti m . Setting the limit for relay LIM.

  • Page 14: Configuration Menu

    INSTRUCIONS FOR USE OM 351 CONFIGURATION MENU • designated for professional service and maintenance • complete instrument setting • access is protected by password or a shorting link on the input connector • authorization for "User mode" Upon delay longer than 30 s the programming mode is automatically dis- 23.

  • Page 15: Configuration Mode - Input

    4. INSTRUMENT SETTING - CONFIGURATION MODE 4.3.1 CONFIGURATION MODE - INPUT The basic instrument functions are adjusted in this menu Internal values resetting INP. CL. t . CL. t . CHA. Selecting the measuring range and measuring rate OUT. AUX. Setting the external control AUX.

  • Page 16: Setting The Measuring Range, Displacement, Compensation And Measuring Rate

    INSTRUCIONS FOR USE OM 351 4.3.1.2.1 SETTING THE MEASURING RANGE Setting the instrument measuring range DC - 1 DC - 2 INP. CL. T. 0. 2 V 60. m PM Input CHA. 2. V 150. m - setting the input range is dependant on the ordered mmeasuring range OUT.
  • Page 17 4. INSTRUMENT SETTING - CONFIGURATION MODE 4.3.1.2.2 SHIFTING THE BEGINNING OF THE RANGE Shifting the beginning of r. Ad. the measuring range INP. CL. t . - in cases when it is necessary to shift the beginning of the range by certain value, e.g. CHA.

  • Page 18: Setting The External Control Input

    INSTRUCIONS FOR USE OM 351 4.3.1.2.5 SETTING THE TEMPERATURE OF THE COLD JUNCTION Setting the temperature t C. J . of the cold junction INP. CL. t . - range 0…98°C with compensation box CHA. OUT. AUX. t . C . J .

  • Page 19: Setting Functions Of The Control Key (Enter)

    4. INSTRUMENT SETTING - CONFIGURATION MODE 4.3.1.4 SETTING OTHER FUNCTIONS OF THE „ENTER“ KEY Setting other functions of the control-key INP. CL. t . DIS. Without function DIS. CHA. ENA. Activation of keys for tare ENb . OUT. AUX. projection and resetting* SER.

  • Page 20: Configuration Mode - Channels

    INSTRUCIONS FOR USE OM 351 4.3.2 CONFIGURATION MODE - CHANNELS In this menu instrument parameters are set Setting display projection for minimum value of the input INP. signal CHA. Setting display projection for maximum value of the input OUT. FIL.

  • Page 21: Setting The Digital Filters

    4. INSTRUMENT SETTING - CONFIGURATION MODE 4.3.2.2 SETTING THE DIGITAL FILTERS Setting the digital filters FIL. INP. Setting the filtration constant co n . CHA. co n . EXP. OUT. FIL. UNS. - this menu is always displayed after selection of a particular type of filter SER.

  • Page 22: Cofiguration And Setting The Limits

    INSTRUCIONS FOR USE OM 351 4.3.3 CONFIGURATION MODE - OUTPUTS It is possible to set the parameters of the instrument output signals in this menu Setting the type and the INP. switching of the limits CHA. DAT. Setting the type and the DAT.

  • Page 23: Setting The Data Output

    4. INSTRUMENT SETTING - CONFIGURATION MODE 4.3.3.2.1 DATA OUTPUT - RATE Setting the data output rate INP. 1. 2 Rate - 1 200 Baud 1. 2 CHA. DAT. ADR. 2. 4 Rate - 2 400 Baud 2. 4 OUT. A. O. 4.

  • Page 24: Setting The Display Brightness

    INSTRUCIONS FOR USE OM 351 4.3.3.3.2 ANALOG OUTPUT - RANGE Setting the analog output A. O. range INP. - analog output is isolated and its value corresponds with the displayed data. It is fully CHA. DAT. programmable, i.e. it allows to assign the AO limit points to any two arbitrary pointsof the OUT.
  • Page 25 4. INSTRUMENT SETTING - CONFIGURATION MODE...

  • Page 26: Configuration Mode - Service

    INSTRUCIONS FOR USE OM 351 4.3.4 CONFIGURATION MODE - SERVICE The instrument‘s service functions are set in this menu Access rights into the „User INP. ACC. ACC. mode“ CHA. RES. Restoration of the RES. manufacture setting and OUT. CAL. instrument calibration Calibration of input range SER.

  • Page 27: Restoration Of The Manufacture Setting

    4. INSTRUMENT SETTING - CONFIGURATION MODE 4.3.4.1.2 ACCESS INTO THE LIMITS SETTING Setting the access rights into limits in the „UM“ INP. ACC. CL. t . DIS. Authorization for item „LIM“, LIN. CHA. LIM. HYS. FoR. setting the boundary RES. Authorization for item OUT.

  • Page 28: Calibration Of The Input Range (Du)

    INSTRUCIONS FOR USE OM 351 4.3.4.3 CALIBRATION OF THE INPUT RANGE Calibration of the input CAL. range INP. ACC. - when MIN is displayed move the potentiometer runner into required minimum CHA. RES. position and confirm by „Enter“, calibration is confirmed by showing sign „OK“...
  • Page 29 4. INSTRUMENT SETTING - CONFIGURATION MODE...

  • Page 30: Method Of Measuring Of The Cold Junction

    INSTRUCIONS FOR USE OM 351 METHOD OF MEASUR. OF THE COLD JUNCT. An istrument with input for temperature measurement with thermocouple allows for setting of two types of measure- ment of the cold junction. Measuring thermocouple OM xxx T/C Reference thermocouple...
  • Page 31 5. METHOD OF MEASUREMENT OF THE COLD JUNCTION...

  • Page 32: Data Protocol

    INSTRUCIONS FOR USE OM 351 DATA PROTOCOL The instruments communicate via serial line RS232 or RS485. For communication they use the ASCII protocol. Communication runs in the following format: ASCII: 8 bit, no parity, one stop bit The transfer rate is adjustable in the instrument menu and depends on the control processor used. The instrument address is set in the instrument menu in the range of 0 ÷...
  • Page 33 6. DATA PROTOCOL...

  • Page 34: Error Statements

    INSTRUCIONS FOR USE OM 351 ERROR STATEMENTS ERRORR CAUSE ELIMINATION change the value of input signal E. U N. range underfl ow (A/D converter) or change display projection change the value of input signal E. O n. range overfl ow (A/D converter)
  • Page 35 7. ERROR STATEMENTS...

  • Page 36: Technical Data

    INSTRUCIONS FOR USE OM 351 TECHNICAL DATA INPUT selectable in confi guration menu Type: J (Fe-CuNi) -200°...900°C selectable in confi guration menu K (NiCr-Ni) -200°...1 300°C DC 1 ±2 mA < 200 mV Input 1 T (Cu-CuNi) -200°...400°C ±20 mA <...
  • Page 37 8. TECHNICAL DATA DATA OUTPUTS Protocols: ASCII Data format: 8 bit + no parity + 1 stop bit (ASCII) Rate: 1 200…38 400 Baud RS 232: isolated, two-way communication RS 485: isolated, two-way communication, addressing (max. 31 instruments) - cannot be combined with analog output ANALOG OUTPUTS Type: isolated, programmable with resolution of max.

  • Page 38: Instrument Dimensions And Installation

    INSTRUCIONS FOR USE OM 351 INSTR. DIMENSIONS AND INSTALLATION Front view Panel cut 96 mm 90,5 mm Side view 119 mm 13,5 mm Panel thickness: 0,5...20 mm Instrument installation 1. insert the instrument into the panel cut-out 2. fit both travellers on the box 3.

  • Page 39: Certificate Of Guarantee

    10. CERTIFICATE OF GUARANTEE 10. CERTIFICATE OF GUARANTEE Product OM 351 Type ........
  • Page 40 +44 - 446 - 21 42 tel: +1 - 713 - 461 21 31 fax: +44 - 446 - 21 42 fax: +1 - 713 - 461 82 83 e-mail: metrix-ua@svitonline.com e-mail: sales@metrix1.com www.metrix1.com TECHDOK - OM 351 - 2003 - v.5.5 - e...

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