Lumel N31U User Manual
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Lumel N31U User Manual

Digital panel meter
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N31U User manual
DIGITAL PANEL METER
N31U
USER MANUAL
1

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Summary of Contents for Lumel N31U

  • Page 1 N31U User manual DIGITAL PANEL METER N31U USER MANUAL...

  • Page 2: Table Of Contents

    N31U User manual CONTENTS APPLICATION.......................3 METER SET......................4 BASIC REQUIREMENTS, OPERATIONAL SAFETY........4 INSTALLATION......................5 Installation method..............6 External connection diagram...........8 Examples of connecting the external transducers....10 SERVICE......................11 Description of the frontal plate..............11 Buttons’ functions...................13 Description of the frontal plate..............14 5.3.1 How to change quantity of a selected parameter.......17 5.3.2 Programmable meter parameters, default parameters....18...
  • Page 3 N31U User manual APPLICATION The N31U meter is a digital panel meter adapted to be fixed to the panel de- signed to measure standard analog signals used in automation. N31U meters enable the measurement of standardized voltage and current signals, the sig- nals from RTD and thermocouple sensors.

  • Page 4: Meter Set

    4 pcs • Seal 1 pcs BASIC REQUIREMENTS, OPERATIONAL SAFETY In terms of a user safety, the N31U meter meets the requirements of the EN61010-1 standard for the devices intended for use in facilities compliant with the third category of installations.

  • Page 5: Installation

    INSTALLATION Installation method The N31U meters are designed to be mounted in a panel. Prior to installation a 92+0.6 x 45+0.6 mm slot must be made in the panel. The maximum thickness of the panel material cannot exceed 6 mm. The meter should be mounted from the front of the panel with disconnected meter connection strips.

  • Page 6: External Connection Diagram

    N31U User manual Electrical connections of the meter should be made with the wires with the cross-section up to 2.5 mm2. Detachable sockets with the plugs of 5.08 mm pitch can be used for the connections. The external dimensions of the meter are shown in Fig. 3 Fig.
  • Page 7 N31U User manual Supply Alarm Measuring inputs, output 10/24 V d.c. Fig. 4: Galvanic isolation of the N31U meter. Note: Unused terminals of the terminal strips must not be connected to any signals. Fig. 5: Signals on the terminal strips.
  • Page 8 N31U User manual Terminal Function Description 1, 2, 3, 4, 5, Measuring inputs Measuring inputs for connecting sensors, transducers or output signals from 7, 8 the other devices. Examples of the connections are shown in Fig. 6. 6, 9 Supply output Auxiliary supplying output (24 V) for supplying the potentiometers, trans- ducers, e.g.

  • Page 9: Examples Of Connecting The External Transducers

    Examples of connecting the external transducers Connections of the head-mount transducers when the transducers are su- pplied directly from the N31U meter are shown below. In the case of the trans- ducers with a voltage output, the maximum current carrying capacity of the auxiliary supply output is 30 mA and the auxiliary supply source is only active for selected input ranges of 10V, 20MA and Pot10V.

  • Page 10: Service

    Connecting the transducer with a voltage output in 3-wire system. SERVICE The N31U meter user interface includes an LCD display and the buttons which enable to display the measuring value, a full configuration and setting of the meter or modification of the parameters.
  • Page 11 N31U User manual Fig. 6: Front panel of the meter. Designation Description The upper (main) line of the display has 6 characters used to display a measuring value or a parameter value during the meter configuration. The lower (auxiliary) line of the display has 5 characters used to display a measuring value, not converted by the individual characteristic or, according to configuration, a unit or current time.

  • Page 12: Buttons' Functions

    N31U User manual Value in the Unit Value in the Unit Value in the Unit register 4008 register 4008 register 4008 (setting) (setting) (setting) ----- kvarh Mvarh kVAh MVAh ºC m/min ºF l/min kvar szt/h Mvar km/h kg/h varh...

  • Page 13: Description Of The Frontal Plate

    N31U User manual Cancel button: • Exiting the menu and exit to the main screen. • Exiting a lower level of the menu and return to a higher level. • Canceling changing the set value (when editing the parameter value) Digit change button: •...
  • Page 14 N31U User manual will allow to enter the menu but it will be not possible to change the parameters - parameters monitoring mode. Entering a correct password will allow to move to a programming matrix, the menu after entering the programming mode is shown below.
  • Page 15 N31U User manual Input type selection Standard avera- Moving window Compensation Compensation (measuring signal ging - number of method averaging method selection - value for manual or sensor). the measurements - number of the important parame- compensation to be averaged..

  • Page 16: How To Change Quantity Of A Selected Parameter

    N31U User manual Selection of Selection of Alarm state chan- Alarm state Alarm activation quantity controlling alarm type. ge lower threshold. change up- delay the alarm state. per threshold. Alarm deactiva- Active alarm tion delay. memory Meter ne- Transmission Baud rate.

  • Page 17: Programmable Meter Parameters, Default Parameters

    5.3.2 Programmable meter parameters, default parameters The N31U meters have a number of programmable parameters, which enable the meter to be adapted to the requirements of application. The parameters grouped according to the menu are shown in the tables below.
  • Page 18 N31U User manual Number of the item for Default: 1 moving window method averaging. Each item is 1...3600 a measurement taken in SAVG time. Selection of resistance Default: AUTO compensation method of the connection cables AUTO – automatic compensation of the terminals temperature is ena-...
  • Page 19 N31U User manual The first point of the Default: 0 individual characteristic - expected value for the -99999...999999 value X1. Last possible point of the Default: 31 individual characteristic. -99999...999999 Last possible point of the Default: 31 individual characteristic –...
  • Page 20 N31U User manual Value selection which should Default: „-----” be displayed in the lower line of the display if the The list of available units is provided in Section 5.1. displaying a unit is selected as a function Selection of the parameter...
  • Page 21 N31U User manual Parameter symbol Description Range of changes MODBUS network meter address Default: 1 1...247 The transmission frame type of RS- Default: F8N1 485 interface. Setting the parity bits and the number of stop bits. F8N1 F8N2 F8O1 F8E1 RS-485 interface baud rate.

  • Page 22: Meter Functions

    5.4 Meter functions 5.4.1 Measurement The N31U meters continuously measure the selected quantity, which is ave- raged in a given period, and convert it according to the selected mathematical function, and then convert it based on the individual characteristic. When shor-...

  • Page 23: Averaging The Measuring Quantity

    5.4.1.2 Minimum and maximum measuring values The N31U meter continuously measures the signal on the indicated input. The measuring value (displayed) is constantly monitored, if the measuring range is not exceeded during the measurement. If the value is smaller than the current minimal value, then the new minimal value is saved.

  • Page 24: Mathematical Functions

    N31U User manual Fig. 10: The message after resetting the maximum value. 5.4.1.3 Mathematical functions The N31U meters have a functionality that enables the conversion of the mea- suring value by the selected mathematical function (MAtH setting): • Sqr – measured value is squared.

  • Page 25: Alarm Output

    5.4.2 Alarm output N31U meters are equipped with one alarm output as standard. The alarm output element is an electromagnetic transmitter. Alarm output is independently configured and can be configured to work in one of six modes.
  • Page 26 N31U User manual Fig. 12: Alarm types: a) n-on; b) n-off; c) off; f) on. Designations used in the drawing: • AL_L – corresponds to PrL setting and determines the alarm state change lower threshold. • AL_H – corresponds to PrH setting and determines the alarm state change upper threshold.

  • Page 27: Rs-485 Interface

    The terminals A, B and GNDI terminals which location is shown in Fig. 5 allow to connect the RS-485 interface to the N31U meter. It is required to connect the lines A and B in parallel with their equivalents in other devices to obtain the correct transmission.

  • Page 28: Description Of The Modbus Protocol Implementation

    • The same baud rate. • The same type of transmission mode (single data frame format). The N31U meters enable programming the following parameters of the RS- 485 link: • Meter address: 1...247. • Baud rate: 2400, 4800, 9600, 14400, 19200, 28800, 38400, 57600, 115200 [b/s].

  • Page 29: Implemented Functions Of Modbus Protocol

    B1 B0 B3 B2. The table below shows the register map of the N31U meter. The addresses in the table are the physical addresses. The register number should be increased by 1 when using the programs where the addresses are provided in a logical format.

  • Page 30: Registers 4000 - 4024

    N31U User manual 5.5.4.1 Registers 4000 – 4024 16-bit readout and write configuration registers. Address Permissible Default Description values Measurement, display and protection of configuration Type of measuring input Type of connected input signal Value Type of signal / range/ sensor...
  • Page 31 N31U User manual Reciprocal of the measuring quantity. 4004 0...5 Square of the reciprocal of the measuring quantity. Square root of the reciprocal of the measuring quantity. Main displayed value on the main display field Value Description 4005 0...2 Value of the measuring quantity, averaged and converted using the...
  • Page 32 N31U User manual 4010 0, 1 Enable the individual characteristics. Value Description Individual characteristic disabled. Individual characteristic enabled. 4011 2...23 Number of points of the individual characteristic. Adress Permissible Default Description values RS-485 4012 1...247 RS–485 – MODBUS network meter address RS–485 –...
  • Page 33 N31U User manual RS–485 – Apply entered settings. Entering the value 1 changes immediately the settings and resets the register. If the RS-485 interface parameters have been 4015 0, 1 modified without applying the change, new parameters will be applied after the meter is turned on again.

  • Page 34: Registers 4200 - 4219

    Device ID 4201 Software version - version number multiplied by the value 100. 4202 N31U meter type - code corresponding to the "U" character. 4203 Meter serial number - older 16 bits. 4204 Meter serial number - younger 16 bits.

  • Page 35: Registers 7500 - 7530 And 7000 - 7030

    N31U User manual 4215 The meter is not calibrated. 4216 Measurement module error. 4217 Measurement error / terminals temperature sensor. 4218 Incorrect configuration of the individual characteristic. 4219 Alarm active. 5.5.4.3 Registers 7500 – 7530 and 7000 – 7030 The 32-bit and the corresponding 16-bit registers with measuring and calcula- ted data.

  • Page 36: Registers 7600 - 7668 And 7200 - 7336

    N31U User manual 5.5.4.4 Registers 7600 – 7668 and 7200 – 7336 The 32-bit and the corresponding 16-bit registers with the configuration para- meters. The address for 32-bit variables was entered in the address field, while the address for accessing data stored in two successive 16-bit registers was entered in a bracket.
  • Page 37 N31U User manual 7619 7238 -99999...999999 7620 7240 -99999...999999 7621 7242 -99999...999999 7622 7244 -99999...999999 7623 7246 -99999...999999 7624 7248 -99999...999999 7625 7250 -99999...999999 7626 7252 -99999...999999 7627 7254 -99999...999999 7628 7256 -99999...999999 7629 7258 -99999...999999 7630 7260 -99999...999999 7631 7262 -99999...999999...

  • Page 38: Error Codes

    -99999...999999 ERROR CODES The N31U meters have several diagnostic functions and settings built-in that allow to limit the displaying. So the display may show and the status regi- sters may store information about the diagnosed error, event or fault. Possible messages and their potential causes are listed below.

  • Page 39: Technical Data

    N31U User manual TECHNICAL DATA Measuring ranges Input type Indication range Class (rated range) PT100 -200...850 ºC (-200...850 ºC) PT1000 -200...850 ºC (-200...850 ºC) 400 Ω 0...440 Ω (0...400 Ω) 4000 Ω 0...4040 Ω (0...4000 Ω) Thermocouple type E -205...1000 ºC (-200...1000 ºC) Thermocouple type J -205...1200 ºC (-200...1200 ºC)
  • Page 40 N31U User manual Measuring loops parameters Current in the sensor circuit during the resistance measurements < 200 μA Input resistance for voltage measurements: thermocouples, 60 mV, 150 mV, 300 mV, > 1 MΩ 0...10 V Input resistance for the current ranges <...
  • Page 41 N31U User manual Auxiliary supply output • Voltage output 10 V for selected measuring input type: potentiometer. • Voltage output 24 V for selected input type: 0..10V, 0/4..20 mA. • Maximum load capacity 24 mA. • Output setting error 0.2% of setpoint.

  • Page 42: Ordering Code

    N31U User manual ORDERING CODE Panel meter N31U XXXX Acceptance tests: without calibration certificate with calibration certificate Version: standard custom-made** XXXX * only after agreeing with a manufacturer.
  • Page 43 N31U User manual LUMEL S.A. ul. Słubicka 4, 65-127 Zielona Góra, Poland tel.: +48 68 45 75 100, fax +48 68 45 75 508 www.lumel.com.pl Technical support: tel.: (+48 68) 45 75 143, 45 75 141, 45 75 144, 45 75 140 e-mail: export@lumel.com.pl...

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