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Hoyt NA5 User Manual

One-channel digital-to-analogue meter with a multicoloured bargraph and a serial interface
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ONE-CHANNEL
DIGITAL-TO-ANALOGUE METER
WITH A MULTICOLOURED
BARGRAPH AND A SERIAL
INTERFACE
NA5 TYPE
USER'S GUIDE

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Summary of Contents for Hoyt NA5

  • Page 1 ONE-CHANNEL DIGITAL-TO-ANALOGUE METER WITH A MULTICOLOURED BARGRAPH AND A SERIAL INTERFACE NA5 TYPE USER’S GUIDE...

  • Page 3: Table Of Contents

    3. BASIC REQUIREMENTS, OPERATIONAL SAFETY ........7 4. INSTALLATION ....................9 5. SERVICING ....................13 6. RS-485 INTERFACE .................31 7. TECHNICAL DATA ..................49 8. BEFORE A FAILURE HAS BEEN DECLARED .........53 9. EXAMPLES OF NA5 METER PROGRAMMING ........55 10. ORDERING PROCEDURE ...............58 11. MAINTENANCE AND GUARANTEE ............60...

  • Page 5: Application

    1. APPLICATION NA5 series meters with multicoloured bargraphs have an universal input desti- ned to measure temperature, resistance, voltage from shunts, standard signals, d.c. voltage and d.c. current. They can find application in various industrial fields, e.g. food industry, intermediate pumping stations, sewage treatment plants, chemical industry, weather stations, breweries.

  • Page 6: Set Of The Meter

    NA5 meters can have in option: a continuous analogue output, a relay output, open collector (OC) type outputs and an RS-485 digital output. They are programmed by means of the keyboard and through RS-485. NA5 meters realise following functions: –...

  • Page 7: Basic Requirements, Operational Safety

    2. Transport, storage Please observe the notes on transport, storage and appropriate handling. Observe the climatic conditions given in Technical Data. 3. Installation The NA5 meter must be installed according to the regulation and instructions  given in this user’s guide.
  • Page 8  for the compliance with the required limit values demanded by the EMC legislation. 5. Operation Measuring systems including NA5 meters must be equipped with protection  devices according to the corresponding standard and regulations for prevention of accidents. After the instrument has been disconnected from the supply voltage, live ...

  • Page 9: Installation

    Before taking the meter housing out, one must turn the supply off.  The removal of the instrument housing during the guarantee contract period  may cause its cancellation. 4. INSTALLATION 4.1. Fitting Prepare a (44 x 137.5 ) mm hole in the panel. The thickness of the material +0.5 +0.5 from which the panel is made should be in the range 1...45 mm.
  • Page 10 4.2. External connection diagrams The description of terminal strips are shown on the fig. 3a. Connections of input signals are shown on the fig 3b and output signals on fig. 3c and 3d. The meter has programmable inputs. Maximal measuring ranges are given on figures.
  • Page 11 Resistance thermometer Resistance thermometer Thermocouple in two-wire system or in three-wire system  300 mV voltage resistance measurement  600 V  40 mA  5 A  600 V voltage input  40 mA current input  5 A current input 24 V d.c.
  • Page 12 RS-485 card NA5 Meter d/ Connection way of the RS-485 interface Fig.3 External connections of the NA5 meter Taking into consideration electromagnetic interference it is recommended to use shielded conductors for the connection of input and output signals.

  • Page 13: Servicing

    The meter blanks automatically insignificant zeros. Key functions: 55-element bargraph (in three-colour execution) 29-element bargraph (in seven-colour execution) Upper alarm threshold Lower alarm threshold Display Acceptation key Escape key Value increasing key Fig. 4 Description of the NA5 frontal plate.
  • Page 14 - acceptation key - entry into the programming mode (hold down during ca 3 seconds), - entry into the chosen parameter level, - entry into the changing mode of the parameter value, - acceptation of the changed parameter value. - Key to increase the value - display of the minimal value (first pressure), maximal (second pressure), return to measurement (third pressure), - mowing on the preview menu or programming matrix,...
  • Page 15 view menu of recorder values. The recorded result number is displayed alternately n320/2174 with the value e.g. The moving on recorded values follows by means of the key. The pressure of this key longer than ca 2 seconds will cause the acceleration of the review. The pressure of the key in any moment will cause the lighting of the number of recorded results.
  • Page 17 Error of the conductor resistance compensation. No connected conductor or damaged conductor. - through RS-485 (p.6.) 5.1. Change of the NA5 meter parameters from the keyboard The pressure of the key during circa three seconds causes the display of the Inscription alternately with the set zero value by the manufacturer.
  • Page 18 Fig. 6. Transition matrix into the programming mode...
  • Page 19 Examples of value changing of the chosen parameter (parameter - symbol) 0000 000.0 00.00 0.000 Auto Example of value changing of the chosen parameter without changing of the decimal point (number parameter) Blanking of insignificant zeros Change of the Change of the Change of the Change of the flickering position...
  • Page 20 Programmable parameters of NA5 meter Table 1 Symbol on the Range of changes Parameter description display Reesistance thermometers: Kind of input - Pt100 - Pt500 pt10 - Pt1000 Thermocouples: te-j - thermocouple, type J te-h - thermocouple, type K te-n...
  • Page 21 auto Kind of compensation of sensor - automatic compensation working conditions changes: (in case of resistance thermometers and - In case of a resistance thermometer resistance measurement it requires a and resistance measurement, it 3-wire line.) concerns the compensation of 0.0...60.0C - value of the reference the resistance changes of the temperature for thermocouples.
  • Page 22 typb Bargraph type 0neC - „ one colour „ bargraph, :ntr - „ interval „ bargraph, sect - „ sector” bargraph, p:nt - „ point bargraph, tren -”trend” bargraph. Fig. 10 explains bargraph types. . colr Bargraph colour - bargraph switched off, - red, - green, - red + green...
  • Page 23 Lower alarm threshold Setting possibility: - 1999... 9999 Upper alarm threshold Setting possibility: - 1999... 9999 typa - normal, Alarm type Fig. 8 shows alarm types - switched on, - switched off, H_0n - manually switched on. Till the time of the alarm type change, the alarm output is being permanently switched on.
  • Page 24 Curl Colour of the lower threshold - alarm marker switched off. alarm marker. - red, CurH Colour of the upper threshold - green, alarm marker. - red + green, Other colours are accessible only in meters with a 7-colour bargraph. - blue, - red + blue, - green + blue,...
  • Page 25 2400 baud Baud rate of the RS-485 interface. - 2400 b/s 4800 - 4800 b/s 9600 - 9600 b/s tryb Kind of transmission through the - interface switched off RS-485 interface. a8n1 - ASCII 8N1 a7e1 - ASCII 7E1 a7o1 - ASCII 7O1 r8n2 - RTU 8N2...
  • Page 26 Switching the recording on or - recording switched off off. At the moment of switching the - recording switched on recording on, the meter erases the previous stored values. go_r Hour of recording start Setting possibility: 00:00:00 ... 23:59:59 Time format: hh:mm:ss date Date of recording start Setting possibility:...
  • Page 27 a) nor (PrH > PrL) 1 - Relay switched on 0 - Relay switched off Measured value b) nor (PrH < PrL) 1 - Relay switched on 0 - Relay switched off Measured value c) OFF 1 - Relay switched on 0 - Relay switched off Measured value d) On...
  • Page 28 Displayed quantity Any characteristic slope d_Y2 d_Y1 Any displacement of the characteristic I_H1 I_H2 Measured quantity Value I_H1 on the meter input => value d_Y1 on the display. Value I_H2 on the meter input => value d_Y2 on the display other characteristic points are calculated Quantity on the analog output...
  • Page 29 Examplary settings of the bargraph and the alarm, ex. 1 Type of Curl = G (green) Notes bargraph Curl CurH = r (red) = rG (red+green) 0neC Value under the value prl Value between :ntr Value ower sect p:nt Value without changes in time Value tren...
  • Page 30 Curh markers (from one alarm). The others are automatically erased. – Max and Min values are erased in case of changes: input type, individual cha- racteristic (on, off), writing of standard parameters. 6. RS-485 INTERFACE Standard parameters of the NA5 meter Table 2 Parameter description Standard value...

  • Page 31: Rs-485 Interface

    (that is not necessary for the interface correct operation). To obtain the connection with the computer of IBM PC class, an RS-232 into RS-485 converter is necessary or an RS-485 interface card. The way of NA5 meter connection through the PD5 converter is shown on the fig. 3d.
  • Page 32  in the network, an identical baud rate and information type.  6.3. Description of the MODBUS protocol functions Following functions of the MODBUS protocol have been implemented in NA5 meters: Function description Table 3 Code Meaning...
  • Page 33 Read-out of n-registers (code 03 h) Function is inaccessible in the publication mode. Example: readout of 2 registers beginning from the register with the address 1 DBDh (7613) in RTU mode. Request: Register Register Number of Number of Check- Device address address registers...

  • Page 34: Device Type

    - XXXXXX Device name - no taken advantage in NA5 meters, 00 X X X X X Analogue output - field depending on the type of the analogue output - 0x00 - lack of analogue output, X 00 X X X X...
  • Page 35 Function address of bytes identifier state device type (CRC) 00 00 3F 80 00 00 FE D7 6.4. Register map of NA5 meters Register map of NA5 meters Table 4. Address Type of value Description range 7000-7200 Float (32 bits) The value is placed in two successive 16-byte registers.
  • Page 36 6.5. Registers for recording and readout NA5 meter Symbol Range Description Identifier 7200 7600 Device identifier Value Channel 7202 7601 0...1 No occurs number input 7204 7602 0...14 Channel input type <Channel number> Value Pt100 RTD Pt500 RTD Pt1000 RTD...
  • Page 37 LoIn Lower value of the input range -1999... 9999 7206 7603 Upper value of the input range HiIn 7208 7604 -1999... 9999 Function 7210 7605 0... 7 Arythmetical function Value Switched off Squaring Extraction of roots Compensation of the conductor resistan- Compens.
  • Page 38 No occurs 7228 7614 Bargraph Bargraph type 7230 7615 0... 4 type Value One-colour (OnEC) Change of colour after exceeding the alarm threshold (the colour change the whole bargraph) (Intr) Change of colour after exceeding the alarm threshold (Three-segment change of colour) (SEct) One-colour bargraph, alarm markers in another colour...
  • Page 39 7240 7620 No occurs Value Channel 1 Channel 2 7242 7621 -1999... 9999 Alarm lower threshold <Alarm No> 7244 7622 -1999... 9999 Alarm upper threshold <Alarm No> Type a 7246 7623 0... 4 Alarm type <Alarm No> Value Normal Switched on Switched off Manually switched on Manually switched off...
  • Page 40 Bargraph colour after exceeding the CURH 7254 7627 0... 7 upper alarm threshold <Alarm No> Value Bargraph switched off (OFF) Red (r) Green (G) Red + Green (rG) Other values accessible only in meters with RGB diodes Blue (b) Red + Blue (rb) Green + blue (Gb) Red + Green + Blue (rGb) 7256...
  • Page 41 RTU 8E2 RTU 8O2 RTU 8N1 Address 7272 7636 0... 247 Choice of the device address Test 7274 7637 0... 1 Test of the display Value Lack of operation Test Hour 7276 7638 0... 23.5959 Current time This parameter occurs with four places after the decimal point in format gg,mmss, where: gg - means hours,...
  • Page 42 7288 7644 1... 31 Day of the recording start Year, Month, Day are information parameters (they do not serve to define the date from which the recording is to be start). Erasing of 7290 7645 0... 1 Erasing of the minimal value minimum Value Lack of operation...
  • Page 43 Time of the memorised 7326 7663 0... 23.5959 Time of memorised value in memory value This parameter occurs with four places after the decimal point in format gg,mmss, where: gg - means hours, mm - means minutes, ss - means seconds In case when introducing and incorrect time, the meter will correct it automa- tically.
  • Page 44 Number of the memori- 7332 7666 0... 750 Number of memorised value in memory, sed value placed in the first register of the buffer Value Memory is empty 1... 750 Number of the memorised value Number of 7334 7667 0... 750 Number of recorded buffer registers recorded registers...
  • Page 45 6.6. Registers only for readout Name Unit Quantity name Identifier 7000 7500 Constant identifying the device Register describing the current state of Status 1 7002 7501 the meter Register describing the current state of Status 2 7004 7502 the meter It is the register defining the control Steering 7006...
  • Page 46 Description of the Status 1 register Position of the decimal point 15 14 13 12 11 10 bits Bit-15... 9 No used Bit-8 Error of the conductor resistance compensation 0 - lack of error 1 - signalling of the compensation error Bit-7...
  • Page 47 Bit-2 Individual characteristic 0 - individual characteristic switched off 1 - individual characteristic switched on Bit-1...0 Kind of output (voltage, current) 00 - lack of analogue output 01 - current 10 - voltage Description of the status 2 register Working mode and information unit...
  • Page 48 Bit-10 State of alarm 6 0 - off 1 - on Bit-9 State of alarm 5 0 - off 1 - on Bit-8 State of alarm 4 0 - off 1 - on Bit-7. State of alarme 3 0 - off 1 - on Bit-6 State of alarm 2 0 - off...

  • Page 49: Technical Data

    7. TECHNICAL DATA INPUTS: Pt100 (- 200... + 850)C Pt500 (- 200... + 850)C Pt1000 (- 200... + 850)C J (Fe-CuNi) (- 100... + 1100)C K (NiCr-NiAl) (-100... + 1370)C N (NiCrSi-NiSi) (- 100... + 1300)C E (NiCr-CuNi) (- 100... + 850)C R (PtRh13-Pt) (0...
  • Page 50 OUTPUTS: – Analogue outputs galvanically isolated, with a resolution = 0,025% of the range load resistance  500  - current programmable: 0/4...20 mA load resistance  500  - or voltage programmable: 0...10 V - output response time 100 ms - output error 0.2% of the range - additional error due to ambient...
  • Page 51 0.1% of measuring range 1 digit Basic error: 0.2% of measuring range 1 digit (for thermocouples R, S, T) Additional errors in nominal working conditions when measuring the temperature: - compensation of reference junction  1C temperature changes - compensation of conductor ...
  • Page 52 Readout field (depending on execution): 4 LED seven-segment LED display, character height: 7 mm indication range: -1999...9999 bargraph length: 88 mm - 55 segments in three-colour execution - 29 segments in seven-colour execution Bargraph resolution programmable  0.5 segment Bargraph accuracy Servicing three keys: Ensured protection degree:...

  • Page 53: Before A Failure Has Been Declared

    8. BEFORE A FAILURE WILL BE DECLARED In case of incorrect symptoms please to acquaint with the table below. SYMPTOMS PROCEDURE 1. Lack of indications on the display. The Check the connection of the feeder cable. bargraph indicates nothing. 2. The time is displayed on the display, The number of measurements Cnt = 0 has been e.g.
  • Page 54 8. A result inconsistent with our expecta- Check if the individual characteristic is not switched tions appears on the display. on. In case of necessity enter into the programming matrix and accept the SEt parameter. The meter will introduce parameters in accordance with the table 2. 9.

  • Page 55: Examples Of Na5 Meter Programming

    9. EXAMPLES OF NA5 METER PROGRAMMING Example 1. Programming of the individual characteristic. If we want to programme so that to the value 4.00 mA will correspond the value 0 on the display, whereas the value 100, to the value 20.00 mA, one must: enter into the programming mode and choose the D_ P parameter ...
  • Page 56 Example 4 Programming of an alarm operating in a set interval with delay. If we want that the alarm 1 will be switched on in the interval from 100 V to 300 V and operate only after 10 seconds, one must: enter into the programming mode, choose the PrL parameter of the alarm 1 ...
  • Page 57 enter into the programming mode, choose the Go_r parameter and introduce  the value 12:30, transit into IntE parameter and introduce the value 00:00:20,  choose the rEc parameter and switch the recording in On,  after exiting from the programming matrix, the memory will be erased and ...

  • Page 58: Ordering Procedure

    10. ORDERING PROCEDURE Table 5 NA5 METER WITH BARGRAPH XX U Bargraph colour: 3 colours (R, G, R + G) ........T 7 colours (R, G, B, R+G, R+B, G+B, R+G+B) ...M Display colour: without display* ............0 red ............R green ................ G blue ................
  • Page 59 Example of NA5 ordering: Code: NA5 M G U 1 1 4 1 0 00 U means: M - NA5 meter with two 7-colour bargraphs, G - digital LED displays of green colour, U - universal input (table 6), 1 - current analogue output signal 0/4...20 mA,...

  • Page 60: Maintenance And Guarantee

    11. MAINTENANCE AND GUARANTEE The NA5 meter does not require any periodical maintenance. In case of some incorrect unit operations: 1. From the shipping date, during the period given in the annexed guaran- tee card One should take the meter down from the installation and return it to the Manufacturer’s Quality Control Dept.
  • Page 61 Product and Technical Support Hoyt Electrical Instrument Works, Inc. 23 Meter Street Penacook, NH 03033 800-258-3652 sales@hoytmeter.com...

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