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senseca HD9408.3B Operating Manual

Barometric transmitter
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OPERATING MANUAL
HD9408.3B
Barometric
transmitter
EN
V1.8

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  • Page 1 OPERATING MANUAL HD9408.3B Barometric transmitter V1.8...

  • Page 2: Table Of Contents

    4.2.1 SDI-12 Connection ..............10 Configuration ..................11 5.1 Choosing the digital output type in HD9408.3B.1 and HD9408.3B.2 ..... 11 5.2 Choosing the protocol in HD9408.3B.1 and HD9408.3B.2 ......11 5.3 Selecting the unit of measurement ............12 5.4 Configuring the analog output ............. 12 5.5 Serial commands of ASCII protocol for HD9408.3B.1 and HD9408.3B.2 ..

  • Page 3: Introduction

    HD9408.3B – Barometric transmitter V1.8 Introduction HD9408.3B is a barometric transmitter that uses a piezoresistive high accuracy and temperature-compensated sensor. It allows measuring the atmospheric pressure with extreme accuracy, time stability, excellent repeatability, low hysteresis and excellent temperature behavior. Pressure measuring ranges: •...

  • Page 4: Technical Specifications

    HD9408.3B.1 and HD9408.3B.2: 10…30 Vdc HD9408.3B.3: 8…30 Vdc Absorption HD9408.3B.1 and HD9408.3B.2: < 10 mA @ 12 Vdc HD9408.3B.3: < 200 µA @ 12 Vdc (average consumption be- tween two subsequent measurements) Pressure connection Ø 5 mm flexible tube Electrical connections Operating conditions -40...+85 °C / 0…100 %RH...
  • Page 5 HD9408.3B – Barometric transmitter V1.8 Dimensions (mm): Page 5 of 32...

  • Page 6: Description

    HD9408.3B – Barometric transmitter V1.8 3 Description Housing mounting holes. M12 connector for power supply and outputs. Barometric pressure input. Page 6 of 32...

  • Page 7: Installation

    See the chapter “Technical specifications” for the dimensions of the mounting holes. 4.1 HD9408.3B.1 and HD9408.3B.2 electrical connections HD9408.3B.1 and HD9408.3B.2 have an 8-pole connector and use the CP18… op- tional cables with 8-pole connector on one side and open wires on the other side. Cable CP18….

  • Page 8: Rs422 Connection

    HD9408.3B – Barometric transmitter V1.8 Other sensors with PLC, datalogger or RS485 output Termination converter RS485/USB Termination or RS485/RS232 for CP18…cable Power supply Shield Fig. 4.1.2: RS485 connection The cable maximum length depends on baud rate and cable characteristics. Typically, the maximum length is 1200m.

  • Page 9: Rs232 Connection

    HD9408.3B – Barometric transmitter V1.8 The cable maximum length depends on baud rate and cable characteristics. Typically, the maximum length is 1200m. The data line must be kept separated from any power lines in order to prevent interferences on the transmitted signal.

  • Page 10: Hd9408.3B.3 Electrical Connections

    In case of analog voltage output, the input resistance Rin of the receiver should be at least 100 kΩ. 4.2 HD9408.3B.3 electrical connections HD9408.3B.3 has a 4-pole connector and use the CPM12AA4… optional cables with 4-pole connector on one side and open wires on the other side. CPM12AA4… cable...

  • Page 11: Configuration

    5 Configuration When powered, the transmitter always starts to operate with the set operating proto- col. The models HD9408.3B.1 and HD9408.3B.2 are factory set with Modbus-RTU pro- tocol, RS485 physical interface, Baud Rate 19200 and communication parameters 8E1. To change the settings of the transmitter, see the next paragraphs.

  • Page 12: Selecting The Unit Of Measurement

    5.4 Configuring the analog output The analog output in the models HD9408.3B.1 and HD9408.3B.2 is factory preset to have the output signal corresponding to the 500…1200 hPa measuring range. The analog output can be configured so as to have the output signal corresponding to a different measuring range by using the serial commands CAI (sets the initial value of the measuring interval) and CAF (sets the final value of the measuring interval).

  • Page 13: Serial Commands Of Ascii Protocol For Hd9408.3B.1 And Hd9408.3B.2

    The details on the use of the serial commands are described in paragraph 5.5. 5.5 Serial commands of ASCII protocol for HD9408.3B.1 and HD9408.3B.2 All the operating parameters can be set by connecting the transmitter to the PC and sending, via a standard serial communication program, the serial commands of the ASCII proprietary protocol.
  • Page 14 HD9408.3B – Barometric transmitter V1.8 TAB. 5.5.1: serial commands for HD9408.3B.1 and HD9408.3B.2 Command Reply Description Instrument general information & Ping Model Instrument model SN=number Serial number Firm.Ver.=version Firmware version Firm.Date=date Firmware date (yyyy/mm/dd) F cal:date and time Date of factory calibration (yyyy/mm/dd hh:mm:ss) Measurements request &...
  • Page 15 HD9408.3B – Barometric transmitter V1.8 Command Reply Description Configuration of units of measurement CPTx &| Sets the temperature unit of measurement read with the Modbus and SDI-12 protocols: x=C ⇒ °C, x=F ⇒ °F Preset to C ⇒ °C & unit of measure-...

  • Page 16: Serial Commands Of Ascii Protocol For Hd9408.3B.3

    Reads the offset set for the pressure measurement. 5.6 Serial commands of ASCII protocol for HD9408.3B.3 In the model HD9408.3B, the operating parameters can be set in two ways: • directly with the SDI-12 protocol, via the extended commands described in chap- ter 8;...
  • Page 17 6. Send the serial commands reported in table 5.6.1 to configure the transmitter or read the current settings (note: use LF as command terminator). 7. To go back to the operating protocol, power cycle the instrument. TAB. 5.6.1: serial commands for HD9408.3B.3 Command Reply...
  • Page 18 HD9408.3B – Barometric transmitter V1.8 Command Reply Description Setting of sensor offset CAXnnnn &| Adds the offset nnnn, expressed in hundredths of hPa, to the measured pressure value. The parameter must be between -1000 (=-10.00 hPa) and +1000 (=+10.00 hPa). For positive values, always indicate also the + sign.

  • Page 19: Modbus-Rtu Protocol

    HD9408.3B – Barometric transmitter V1.8 6 Modbus-RTU protocol In MODBUS-RTU mode (only models HD9408.3B.1 and HD9408.3B.2), the instrument sends the acquired measurements only if specifically requested by the PC, PLC or data logger. The protocol is available with RS485 and RS422 serial connections.
  • Page 20 HD9408.3B – Barometric transmitter V1.8 TAB. 6.2.1: Holding Registers Address Description Format Indicator of the correct execution of the last writing command. 16-bit integer If 0, the command has been executed correctly. If 1, command execution errors occurred. Indicator of the correct permanent storage of the parameters.

  • Page 21: Configuration Register

    HD9408.3B – Barometric transmitter V1.8 6.3 Configuration register The configuration register (Holding Register with address 6) allows reading the offset applied to the pressure measurement and the setting of pressure and temperature units of measurement. The register is read-only. The meaning of the register bits is shown in the following table.

  • Page 22: Nmea Protocol

    V1.8 7 NMEA protocol In NMEA mode (only models HD9408.3B.1 and HD9408.3B.2), the instrument sends automatically the acquired measurements at regular intervals. The interval is factory- set to 1 second and can be configured within 1 and 3600 seconds. To change the in- terval you should send the serial command CPD of the ASCII proprietary protocol (see the parameters setting procedure in paragraph 5.5).

  • Page 23: Sdi-12 Protocol

    HD9408.3B – Barometric transmitter V1.8 8 SDI-12 protocol The HD9408.3B.3 transmitter is equipped with an SDI-12 communication interface compliant with the version 1.3 of the protocol, which allows the connection to SDI-12 sensors networks. The communication parameters are “1200, 7E1”.
  • Page 24 HD9408.3B – Barometric transmitter V1.8 Type M (start measurement) commands Command Reply Description Atmospheric pressure in mbar atttn<CR><LF> Request for performing the measurement of at- with: ttt = number of seconds necessary for the in- mospheric pressure in strument to make the measure available mbar.
  • Page 25 HD9408.3B – Barometric transmitter V1.8 Command Reply Description Status and units of measurement aM3! atttn<CR><LF> Request of transmitter sta- tus and units of measure- with: ttt = number of seconds necessary for the in- ment. strument to make the info available (3 characters).
  • Page 26 HD9408.3B – Barometric transmitter V1.8 Type X (extended commands) commands Command Reply Description aXSG0! aModel|<CR><LF> Request of the instrument model. aXSG2! aSN=number|<CR><LF> Request of the instrument serial number. aXSG3! aFirm.Ver.=version|<CR><LF> Request of the firmware version. aXSG4! aAAAA/MM/GG|<CR><LF> Request of the firmware date.
  • Page 27 HD9408.3B – Barometric transmitter V1.8 The configuration commands aXSCPUn!, aXSCAXnnnn! and aSXCPTx! require that the configuration mode is activated by sending the command aXSCAL USER ON!. The con- figuration mode is disabled if no configuration commands are sent for 5 minutes.

  • Page 28: Maintenance

    HD9408.3B – Barometric transmitter V1.8 9 Maintenance Do not use aggressive cleaning agents or incompatible with the materials indicated in the technical specifications. For cleaning, use a soft dry cloth or slightly dampened with clean water. 10 Safety instructions The instrument proper operation and operating safety can be ensured only in the cli- matic conditions specified in this manual and if all standard safety measures as well as the specific measures described in this manual are followed.

  • Page 29: Accessories Ordering Codes

    The cable is optional and has to be ordered separately. CP18… Cable with 8-pole M12 connector on one end, open wires on the other end. Length 5 m (CP18.5) or 10 m (CP18.10). For HD9408.3B.1 and HD9408.3B.2. CPM12AA4… Cable with 4-pole M12 connector on one end, open wires on the other end.
  • Page 30 HD9408.3B – Barometric transmitter V1.8 Notes Page 30 of 32...
  • Page 31 WARRANTY The manufacturer is required to respond to the "factory warranty" only in those cases provided by Legislative Decree 6 September 2005 - n. 206. Each instrument is sold after rigorous inspections; if any manufacturing defect is found, it is necessary to contact the distributor where the instrument was purchased from.
  • Page 32 Senseca Italy S.r.l. Via Marconi, 5 35030 Selvazzano Dentro (PD) ITALY info@senseca.com...

This manual is also suitable for:

Hd9408.3b.1Hd9408.3b.2Hd9408.3b.3

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