Related Manuals for Vaisala HMP260 SERIES
Summary of Contents for Vaisala HMP260 SERIES
- Page 1 HMP260 SERIES TRANSMITTERS Operating Manual HMP260-U017en-1.5 5 January 1996 Vaisala 1996...
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Page 3: Table Of Contents
HMP260 SERIES HMP260-U017en-1.5 Operating Manual Contents PRODUCT DESCRIPTION ..................1 TO BE NOTED WHEN MEASURING HUMIDITY ............3 INSTALLATION......................4 3.1. Selecting the place of installation ..............4 3.2. Mounting ......................5 3.2.1. HMP263 transmitter ................. 6 3.2.2. HMP264 transmitter ................. 7 3.2.3. - Page 4 HMP260 SERIES Operating Manual HMP260-U017en-1.5 5.4. Serial commands ..................32 5.4.1. Analogue output commands............32 5.4.1.1. Setting the analogue outputs ............32 5.4.1.2. Selecting and scaling the analogue output quantities ....33 5.4.1.3. Scaling the analogue outputs ............33 5.4.2.
- Page 5 HMP260 SERIES HMP260-U017en-1.5 Operating Manual TECHNICAL DATA....................53 8.1. Relative humidity..................53 8.2. Temperature....................53 8.3. Calculated variables ..................53 8.4. Pressure....................... 55 8.5. Analogue outputs ..................55 8.6. Electronics ....................55 8.7. Mechanics ....................56 8.8. Environmental conditions................58 8.8.1...
- Page 6 HMP260 SERIES Operating Manual HMP260-U017en-1.5 This page intentionally left blank. 1997-11-25...
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Page 7: Product Description
Before installing and using the HMP260 transmitter study carefully Appendix 2: SAFETY SUMMARY. The HMP260 series transmitters are associated electrical apparatuses. This means that the housing of the transmitter is mounted into a safe area and the sensor head and its cable can go to a potentially explosive environment (hazardous area). - Page 8 HMP260 SERIES Operating Manual HMP260-U017en-1.5 Options Calculation variables dewpoint temperature, mixing ratio, absolute hu- midity, wet bulb temperature Serial interface RS 232C (standard), RS 485/422, digital current loop Display cover cover with or without local display & keypad Filters sintered filter, PPS grid with steel netting, PPS...
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Page 9: To Be Noted When Measuring Humidity
HMP260 SERIES HMP260-U017en-1.5 Operating Manual 2. TO BE NOTED WHEN MEASURING HUMIDITY In the measurement of humidity and especially in calibration, it is essential that temperature equilibrium is reached. Even a small difference in temperature between the measured object and the sensor causes an error. If the temperature is +20 °C (+68 °F) and the relative humidity 50 %RH, a... -
Page 10: Installation
HMP260 SERIES Operating Manual HMP260-U017en-1.5 3. INSTALLATION 3.1. Selecting the place of installation The transmitters should be installed in a place that gives a true picture of the environment or process and is as clean as possible. Air should circulate freely around the sensor. -
Page 11: Mounting
HMP260 SERIES HMP260-U017en-1.5 Operating Manual 3.2. Mounting SAFE AREA HMP263/264/265 HAZARDOUS AREA (EEx ia) IIC EEx ia IIC T3/T4 HMP263 sensor head Supply voltage 24 VDC Analog outputs (mA/V) RS 232C/ RS 485 /digital current loop HMP264 sensor head for pressurized spaces HMP265 sensor head Fig. -
Page 12: Hmp263 Transmitter
This procedure is not allowed for the user. Vaisala is not responsible for any damages caused by incorrect use. 3.2.1. -
Page 13: Hmp264 Transmitter
HMP260 SERIES HMP260-U017en-1.5 Operating Manual NOTE When using the support bar the lead-through piece and the space between the duct wall and the flange must be sealed e.g. with silicon. The sealings must fulfil EEx requirements. The sensor head can also be installed vertically. - Page 14 HMP260 SERIES Operating Manual HMP260-U017en-1.5 3. Insert the body of the sensor head into the fitting body and screw the nut manually to the fitting body until the connection feels tight. 4. Mark both the fitting body and the nut hex.
- Page 15 Metal sealing washer DIN 7603 NPT Conical pipe threaded connection ANSI/ASME B1.20.1-1983 sealing by anaerobic pipe thread seal fitting body. VAISALA code 17225 (SWAK, Cajon Company) or PTFE (AISI 316Ti). Body hex = 27 mm (teflon) tape tightening torque=150 Nm ±10 Nm Fig.
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Page 16: Hmp265 Transmitter
HMP260 SERIES Operating Manual HMP260-U017en-1.5 3.2.3. HMP265 transmitter SAFE AREA to be sealed to be insulated HAZARDOUS AREA Fig. 3.5 Installing a transmitter in a process with the sensor head hori- zontally SAFE AREA to be sealed to be insulated HAZARDOUS AREA Fig. -
Page 17: Grounding
HMP260 SERIES HMP260-U017en-1.5 Operating Manual a plugged hole for an Exi-approved HAZARDOUS AREA reference meter SAFE AREA Fig. 3.7 Mounting the sensor head on a duct or channel When the sensor head is installed in a duct or a channel, the temperature difference of the air inside and outside the duct must be small as the sensor head conducts heat. - Page 18 HMP260 SERIES Operating Manual HMP260-U017en-1.5 flexible wires 0.5 mm (AWG 20), stranded wires recommended braid shielding tube brass braid disks brass disks rubber ring D = Ø 7...10 cable (If the cable diameter is less than 7mm, use a shrinking...
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Page 19: Electrical Connections
HMP260 SERIES HMP260-U017en-1.5 Operating Manual NOTE When the cable is grounded as above, the metallic parts of the sensor head, the shield of its cable, the transmitter housing and the shield of the signal cable to external system are all connected to each other. The... - Page 20 IF THE CONNECTION INSTRUCTIONS ARE NOT CAREFULLY FOLLOWED OR THE COMPONENTS IN THE PROTECTION UNIT ARE MODIFIED OR TAMPERED WITH, THE DEVICE DOES NOT MEET THE REQUIREMENTS OF EXi CLASSIFICATION. VAISALA IS NOT RESPONSIBLE FOR ANY DAM- AGES CAUSED BY INCORRECT USE. 1997-11-25...
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Page 21: Commissioning
When the security lock jumper is connected, some commands are not available (see Chapter 5 Commands). Should the application require variables that are not included in the configuration of the transmitter, the user is invited to contact Vaisala or a Vaisala representative. Selecting the analogue outputs The HMP260 transmitters can be ordered ready with the current or voltage outputs required. - Page 22 HMP260 SERIES Operating Manual HMP260-U017en-1.5 CURRENT OUTPUTS 0 ... 20 / 4 ... 20 mA VOLTAGE OUTPUTS 0 ... 5 V / 0 ... 10 V VOLTAGE OUTPUTS 0 ... 1 V CH1 0 ... 1 VOLTAGE OUTPUT CH2 CURRENT OUTPUT OPENED COVER OF THE HMP260 Fig.
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Page 23: Connecting The Rs 232C Serial Bus
HMP260 SERIES HMP260-U017en-1.5 Operating Manual spare jumpers Fig. 4.3 Spare jumpers Connecting the RS 232C serial bus Fig. 4.4 Serial bus connections To connect a PC to the HMP260 transmitters via the RS 232C serial bus, one of the following cables is required. The type of cable depends on the terminal and the connector type. - Page 24 HMP260 SERIES Operating Manual HMP260-U017en-1.5 HMP 23 D25S TERMINAL D25P Fig. 4.5 Connection of cables When the serial bus has been connected between the PC and the transmitter, the PC is switched on. When using a PC, a terminal emulation programme (e.g.
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Page 25: Reverting To Factory Settings Of The Serial Port
HMP260 SERIES HMP260-U017en-1.5 Operating Manual The RS 232C screw terminal cannot be used if an RS 485/422 serial module or a digital current loop module is used. See appendices 3 and 4 on how to install and operate these modules. - Page 26 HMP260 SERIES Operating Manual HMP260-U017en-1.5 jumper must be removed before the transmitter is reset. If the jumper is in place when power is turned on, the transmitter does not work. After jumper insertion the transmitter is in STOP mode, ready to receive commands.
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Page 27: Commands
HMP260 SERIES HMP260-U017en-1.5 Operating Manual COMMANDS As the HMP260 transmitters are microprocessor based devices, their configuration can be set to correspond to the specific needs of the user. This is done through commands, either utilizing the menus on the local display or by giving commands through the serial interface (see Appendix 1). -
Page 28: Led Commands
HMP260 SERIES Operating Manual HMP260-U017en-1.5 LED commands NOTE If the transmitter has a display/keypad cover, the LED commands cannot be used. LED commands can be used to operate the transmitters in the field. These commands can be used in humidity and temperature calibration and calibration of the analogue outputs. -
Page 29: Display/Keypad Commands
HMP260 SERIES HMP260-U017en-1.5 Operating Manual Display/keypad commands 5.3.1 Display mode In the display mode the transmitters output measurements on the display; dif- ferent quantities can be scrolled with the arrow keys according to the variables selected when ordering the transmitter. After reset the transmitters are always in the display mode. -
Page 30: Analogue Output Commands
HMP260 SERIES Operating Manual HMP260-U017en-1.5 numbers is ended with selecting a blank ' ' and pressing ENT. The last charac- ter entered can be deleted with CL. If CL or ENT key is pressed when the field is empty, the programme returns to the previous display. -
Page 31: Selecting And Scaling The Analogue Output Quantities
HMP260 SERIES HMP260-U017en-1.5 Operating Manual NOTE The analogue output jumpers must be set to right places (see Fig. 4.2). 5.3.4.2 Selecting and scaling the analogue output quantities Disconnect the security lock jumper! Select Mode in the main menu and Analog outputs in the Mode menu: Select Scale. -
Page 32: Output Via The Serial Bus
HMP260 SERIES Operating Manual HMP260-U017en-1.5 5.3.5 Output via the serial bus 5.3.5.1 Turning the serial interface echo ON/OFF Select More in the main menu, select More in the More menu and select Echo in the second More menu. Use the arrow keys to select the right alternative and press ENT. -
Page 33: Setting The Transmitter Address
HMP260 SERIES HMP260-U017en-1.5 Operating Manual Selecting stop bits: Full duplex/half duplex: The processor does not allow the following combinations: no parity, 7 data bits, 1 stop bit: if this combination is given the HMP260 programme will change the number of stop bits to 2... -
Page 34: Selecting The Output Units
HMP260 SERIES Operating Manual HMP260-U017en-1.5 5.3.5.4 Selecting the output units Select Unit in the main menu: Use the arrow keys to select the right alternative and press ENT. metric non-metric °C °F °C °F gr/ft g/kg gr/lb °C °F 5.3.6... -
Page 35: Others
HMP260 SERIES HMP260-U017en-1.5 Operating Manual 5.3.6.1 Setting the serial interface operation mode Select Mode in the main menu; the following is displayed: Select Serial output: The currently valid setting flashes. Select the desired mode with the arrow keys and press ENT. After this the programme returns to the Mode Menu. -
Page 36: Setting The Pressure For Mixing Ratio And Wet Bulb Calculations
HMP260 SERIES Operating Manual HMP260-U017en-1.5 Select More in the main menu, select More in the More menu and select Mtim in the second More menu: Pressing ENT returns the programme to the main menu without changing the integration time. If the integration time needs to be changed, press CL; enter the new integration time with the arrow keys (4...255) -
Page 37: Setting The Date
HMP260 SERIES HMP260-U017en-1.5 Operating Manual 5.3.7.3 Setting the date Select More in the main menu; select Date in the More menu: If the date is correct, acknowledge it by pressing ENT; this takes the programme back to the More menu. -
Page 38: Serial Commands
HMP260 SERIES Operating Manual HMP260-U017en-1.5 Serial commands More detailed descriptions of the serial commands can be found in Appendix 1. Here only the most commonly used command sequences are described. The instructions on how to connect the HMP260 transmitters to serial bus are given in Chapter 4.3. -
Page 39: Selecting And Scaling The Analogue Output Quantities
HMP260 SERIES HMP260-U017en-1.5 Operating Manual 5.4.1.2 Selecting and scaling the analogue output quantities Disconnect the security lock jumper! ASEL xxx yyy <cr> channel 1's quantity channel 2's quantity (RH, T, Td, Abs, Mix or Tw) Example: relative humidity selected on channel 1 and temperature on channel 2 ASEL RH T <cr>... -
Page 40: Output Via The Serial Bus
HMP260 SERIES Operating Manual HMP260-U017en-1.5 5.4.2 Output via the serial bus 5.4.2.1 Starting the measurement output R <cr> Starts output of measurements to the peripheral devices (RUN mode); the only available command is S (stop). The output mode can be changed with command FORM (see Appendix 1). -
Page 41: Setting The Output Interval For The Run Mode
HMP260 SERIES HMP260-U017en-1.5 Operating Manual 5.4.2.4 Setting the output interval for the RUN mode INTV xxx yyy <cr> output interval (0...255) 0: no pause between outputs unit (s, min or h) Example: output interval is changed into 10 minutes INTV 10 min <cr>... -
Page 42: Selecting The Output Units
HMP260 SERIES Operating Manual HMP260-U017en-1.5 5.4.2.6 Selecting the output units UNIT x <cr> m(etric units) n(on-metric units) metric non-metric °C °F °C °F gr/ft g/kg gr/lb °C °F 5.4.2.7 Setting the transmitter address ADDR aa <cr> address (0...99) Example: transmitter is given address 99 ADDR <cr>... -
Page 43: Open & Close
HMP260 SERIES HMP260-U017en-1.5 Operating Manual In POLL mode: measurements output only with command SEND. When in POLL mode, the output state is changed as follows: OPEN aa <cr> SMODE xxxx<cr> address of the transmitter xxxx STOP, RUN or POLL The OPEN command sets the bus temporarily in STOP mode so that the SMODE command can be given. -
Page 44: Calibration
Humidity calibration A two-point calibration can be done with the HMK11 or the HMK13B Calibrator, or the instrument can be sent to Vaisala. We recommend recalibration at least once a year. The instruments must be recalibrated every time the HUMICAP humidity sensor is changed. -
Page 45: One Point Humidity Calibration
HMP260 SERIES HMP260-U017en-1.5 Operating Manual NOTE If the sensor has been changed, the calibration has to be done according to the instructions in Chapter 6.1.3. 6.1.1. One point calibration procedure 6.1.1.1 Using serial commands Disconnect the security lock jumper! Make sure that the sensors of the transmitter and the reference in- strument are close to each other. -
Page 46: Using Led Commands
HMP260 SERIES Operating Manual HMP260-U017en-1.5 6.1.1.3 Using LED commands Disconnect the security lock jumper! Make sure that the sensors of the transmitter and the reference in- strument are close to each other. Allow enough time for the sensor heads to stabilize to the measurement conditions Connect an ammeter/voltmeter to the analogue outputs (connector X2);... -
Page 47: Using Display/Keypad Commands
HMP260 SERIES HMP260-U017en-1.5 Operating Manual If you want to see how the sensor stabilizes to the humidity in the calibrator, enter c <cr> instead of the first reference: RH : 11.9 Ref1 ? c <cr> RH : 11.5 Ref1 ? c <cr>... -
Page 48: Calibration Procedure After Sensor Change
HMP260 SERIES Operating Manual HMP260-U017en-1.5 Wait for 10 minutes. Connect an ammeter/voltmeter to the analogue outputs (connector X2). Give command ¡¡¡l. At the first calibration point the LED on the left flashes; adjust the first point (offset) with the arrow switches to the value given in the calibration table (Chapter 6.1.4) and... -
Page 49: Using Display/Keypad Commands
HMP260 SERIES HMP260-U017en-1.5 Operating Manual Press any key and enter the second point value and press <cr>. RH : xx.x Ref2 ? yy.y <cr> The stabilization of the sensor can be monitored by entering c <cr> instead of the reference value. -
Page 50: Humidity Calibration Table
HMP260 SERIES Operating Manual HMP260-U017en-1.5 Check that the reading corresponds within the desired accuracy to the reading in the calibration table. If not, adjust the second point with the arrow switches to the correct value and press ENT. At the second calibration point the second LED from the left flashes. -
Page 51: One Point Offset Correction
HMP260 SERIES HMP260-U017en-1.5 Operating Manual 6.2.1 One point offset correction 6.2.1.1 Using serial commands Disconnect the security lock jumper! Leave the reference instrument and the transmitter for at least 4 hours in the same space so that their temperatures have time to equalize. -
Page 52: Using Led Commands
HMP260 SERIES Operating Manual HMP260-U017en-1.5 6.2.1.3 Using LED commands Disconnect the security lock jumper! Leave the reference instrument and the transmitter for at least 4 hours in the same space so that their temperatures have time to equalize. Remove the filter cap prior to calibration. -
Page 53: Using Display/Keypad Commands
HMP260 SERIES HMP260-U017en-1.5 Operating Manual The stabilization of the sensor can be monitored by entering c <cr> instead of the reference value. 6.2.2.2 Using display/keypad commands Disconnect the security lock jumper! Leave the reference instrument and the transmitter for at least 4 hours in the same space so that their temperatures have time to equalize. -
Page 54: Calibration Of Analogue Outputs
HMP260 SERIES Operating Manual HMP260-U017en-1.5 Calibration of analogue outputs The analogue outputs have been calibrated at the factory and since they are very stable, calibration of the outputs should be performed only when there is reason to believe that their adjustments have changed. - Page 55 HMP260 SERIES HMP260-U017en-1.5 Operating Manual Connect the meter to the output of channel 2 and enter the measured lower end current/voltage on channel 2. Enter the measured upper end current/voltage on channel 2. 6.3.4 Using LED commands If both the analogue outputs and humidity/temperature channels are calibrated, the analogue outputs should be calibrated first.
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Page 56: Using Led Commands
If errors or faults are found, first check whether the humidity and temperature sensors are damaged. If they are intact, send the transmitter to Vaisala or a Vaisala representative for repairs. The error messages the transmitter outputs are listed in Appendix 3. -
Page 57: Changing The Humicap® Sensor And The Filter
HMP260 SERIES HMP260-U017en-1.5 Operating Manual When errors have occurred, the transmitter outputs the error code (see Appen- dix 3 for all error messages): >ERRS <cr> E40 f ( all ) out of range > ® Changing the HUMICAP sensor and the filter Remove the damaged sensor and insert a new one. -
Page 58: Adjusting The Contrast Of The Display
HMP260 SERIES Operating Manual HMP260-U017en-1.5 CH1+ CH1+ CH1- TEST POINTS CH1- Fig. 7.4 Circuit diagram of the analogue output current test points Adjusting the contrast of the display The contrast of the display can be adjusted using the trimmer "LCD display contrast"... -
Page 59: Technical Data
HMP260 SERIES HMP260-U017en-1.5 Operating Manual TECHNICAL DATA Specifications of the protection unit, see Appendix 9. Relative humidity Measuring range 0...100 %RH Accuracy (including nonlinearity and repeatability) maximum achievable accuracy when calibrated against high quality, certi- fied humidity standards: ±1 %RH (0...90 %RH) ±2 %RH (90...100 %RH) - Page 60 HMP260 SERIES Operating Manual HMP260-U017en-1.5 Accuracies of the calculated quantities depend on the accuracies of the meas- ured quantities: relative humidity and temperature. In the tables below their accuracies are ±2 %RH and ±0.2 °C. Accuracy of dewpoint temperature (°C) Relative humidity Temp.
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Page 61: Pressure
HMP260 SERIES HMP260-U017en-1.5 Operating Manual Accuracy of wet bulb temperature (°C) Relative humidity Temp. 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.21 0.21 0.22 0.22 0.22 0.22 0.23 0.23 0.27 0.28 0.28 0.29 0.29 0.29 0.30 0.30 0.31 0.31 0.45... -
Page 62: Mechanics
HMP260 SERIES Operating Manual HMP260-U017en-1.5 Connections screw terminals, 0.5 mm wires (AWG 20), stranded wires recommended Operating voltage 24 VDC (20...28 V) Power consumption 120 mA maximum (24 VDC) Recommended external load for <500 current outputs Recommended external load for >2 k... - Page 63 HMP260 SERIES HMP260-U017en-1.5 Operating Manual cable length 2000, 5000, 10 000 or 15 000 m Fig. 8.1 HMP263 sensor head dimensions Fitting body hex=27 cable length 2000, Nut hex=32 5000, 10 000 or 15 000 m Fig. 8.2 HMP264 sensor head dimensions...
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Page 64: Emissions
HMP260 SERIES Operating Manual HMP260-U017en-1.5 Electromagnetic compatibility The emission and immunity tests have been performed according to standards EN50081-1 and EN50082-2. NOTE These tests are valid with specified sensor protections only. Type: Sensor protection/notes: HMP263 PPS grid & stainless steel netting (part no. -
Page 65: Options
HMP264 (1/2 - 14 NPT) GUARANTEE Vaisala issues a guarantee for the material and workmanship of this product under normal operating condition for one (1) year from the date of delivery. Exceptional operating conditions, damage due to careless handling and misapplication will void the guarantee. - Page 66 HMP260 SERIES HMP260-U017en-1.5 Appendix 1: Serial commands SERIAL COMMANDS ANALOGUE OUTPUT COMMANDS ................2 AMODE Setting the analogue outputs..............2 ASEL Selecting the scaling the analogue output quantities....... 2 ASCL Scaling the analogue outputs ............... 3 CALIBRATION COMMANDS..................5 Relative humidity calibration ..............5 FCRH Relative humidity calibration after sensor change........
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Page 68: Analogue Output Commands
HMP260 SERIES HMP260-U017en-1.5 Appendix 1: Serial commands ANALOGUE OUTPUT COMMANDS AMODE Setting the analogue outputs Disconnect the security lock jumper! AMODE a bb.bbb cc.ccc d ee.eee ff.fff <cr> channel 1: voltage output current output bb.bbb = lower limit of channel 1 cc.ccc... -
Page 69: Ascl Scaling The Analogue Outputs
HMP260 SERIES Appendix 1: Serial commands HMP260-U017en-1.5 ASEL RH T <cr> (RH) lo 0.000 %RH ? <cr> (RH) hi 100.000 %RH ? <cr> ) lo -40.000 'C ? 0 <cr> ) hi +160.000 'C 100 <cr> When the ASEL command is given on its own, the transmitter outputs its current settings: ASEL <cr>... - Page 70 HMP260 SERIES HMP260-U017en-1.5 Appendix 1: Serial commands The output scales can also be given directly with the ASCL command. ASCL aaa.a bbb.b ccc.c ddd.d <cr> aaa.a lower limit of channel 1 bbb.b upper limit of channel 1 ccc.c lower limit of channel 2 ddd.d...
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Page 71: Calibration Commands
HMP260 SERIES Appendix 1: Serial commands HMP260-U017en-1.5 CALIBRATION COMMANDS Relative humidity calibration Disconnect the security lock jumper! CRH <cr> With this command the transmitters can be calibrated against a reference. A one-point calibration can be done against an accurate transfer standard in the field and a two-point calibration using saturated salt solutions in controlled conditions. -
Page 72: Fcrh Relative Humidity Calibration After Sensor Change
HMP260 SERIES HMP260-U017en-1.5 Appendix 1: Serial commands FCRH Relative humidity calibration after sensor change Disconnect the security lock jumper! FCRH <cr> After humidity sensor change the transmitter must be calibrated using this command and the calibration must be done at two reference points. The calibration is performed as follows: FCRH <cr>... -
Page 73: Acal Calibrating The Analogue Outputs
HMP260 SERIES Appendix 1: Serial commands HMP260-U017en-1.5 In one-point offset correction, the Ref2 prompt is acknowledged with <cr>: CT <cr> 0.80 Ref1 ? 0.0 <cr> Press any key when ready ... 75.50 Ref2 ? <cr> If the stabilization of the sensor to the temperature of the calibrator or the reference needs to be monitored, the measurement output can be repeated by giving command c<cr>... -
Page 74: Li Entering Linear Correction Coefficients
HMP260 SERIES HMP260-U017en-1.5 Appendix 1: Serial commands Entering linear correction coefficients Disconnect the security lock jumper! LI <cr> The LI command is one way of calibrating the transmitters. LI <cr> offset : 0.000 -.6 <cr> gain : 1.000 ? <cr>... -
Page 75: Output Via The Serial Bus
HMP260 SERIES Appendix 1: Serial commands HMP260-U017en-1.5 OUTPUT VIA THE SERIAL BUS Starting the measurement output R <cr> Starts output of measurements to the peripheral devices (PC display or printer); output interval is set with command INTV. The output format depends on the transmitter configuration and the variables in use. The order, however, is always the same: relative humidity, temperature, dewpoint temperature, absolute humidity, mixing ratio and wet bulb temperature. -
Page 76: Appendix 1 Serial Commands
HMP260 SERIES HMP260-U017en-1.5 Appendix 1: Serial commands The output mode can be changed with command FORM. DSEND Outputting readings of all connected transmitters once DSEND <cr> All transmitters connected to the serial bus send their addresses and current measurement readings in an order defined by their addresses. After receiving DSEND command a transmitter sets a delay time according to its address value and sends the data after this delay. -
Page 77: Echo Turning The Serial Interface Echo On/Off
HMP260 SERIES Appendix 1: Serial commands HMP260-U017en-1.5 ECHO Turning the serial interface echo ON/OFF ECHO xxx <cr> ON or OFF When the echo is off, the commands given through the serial interface or the prompt > cannot be seen on the display. -
Page 78: Form Setting The Output Format
HMP260 SERIES HMP260-U017en-1.5 Appendix 1: Serial commands FORM Setting the output format FORM <cr> "xxx...xxx" ? zzz...zzz <cr> xxx...xxx = old format zzz...zzz = new format The FORM command sets the format of the outputs generated in RUN mode and by SEND command. -
Page 79: Ftime Adding Time To Output
HMP260 SERIES Appendix 1: Serial commands HMP260-U017en-1.5 An example of a format suitable for use in Microsoft Excel spreadsheets: FORM <cr> "xxx...xxx" ?\UUU.U\\t\TTT.T\\t\DDD.D\\t\AAA.A\\t\XXX.X\\t\WWW.W\\r\n <cr> The output is then: 47.4<tab> 22.4 <tab> 10.6 <tab> 9.4 <tab> 8.0 <tab> 15.4 <cr><lf> FTIME Adding time to output FTIME xxx <cr>... -
Page 80: Fdate Adding Date To Output
HMP260 SERIES HMP260-U017en-1.5 Appendix 1: Serial commands FDATE Adding date to output FDATE xxx <cr> ON or OFF When FDATE is activated, the current date is output at the beginning of the output line. The time is set with command DATE. After RESET or power on the current date is 1991-01-01. -
Page 81: Unit Selecting The Output Units
HMP260 SERIES Appendix 1: Serial commands HMP260-U017en-1.5 The settings can be changed one parameter at a time or all parameters at once: SERI O H <cr> changing parity and duplex 4800 O 7 1 HDX changing all parameters SERI 600 N 8 1 F <cr>... -
Page 82: Addr Setting The Transmitter Address
HMP260 SERIES HMP260-U017en-1.5 Appendix 1: Serial commands ADDR Setting the transmitter address ADDR aa <cr> address (0...99) The address is used when more than one transmitter is connected to one serial bus. The ADDR command makes it possible to communicate with one transmitter at a time in POLL mode. -
Page 83: Open & Close
HMP260 SERIES Appendix 1: Serial commands HMP260-U017en-1.5 OPEN aa <cr> SMODE xxxx<cr> address of the transmitter xxxx STOP, RUN or POLL The OPEN command sets the bus temporarily in STOP mode so that the SMODE command can be given. For example: >SMODE <cr>... -
Page 84: Others
HMP260 SERIES HMP260-U017en-1.5 Appendix 1: Serial commands OTHERS ITEST Testing the analogue outputs ITEST <cr> ITEST a b <cr> current/voltage of channel 1 current/voltage of channel 2 The operation of the analogue outputs can be tested by forcing the outputs to given values which can then be measured with a current/voltage meter from the analogue outputs. -
Page 85: Pres Setting The Pressure For Mixing Ratio And Wet Bulb Calculations
HMP260 SERIES Appendix 1: Serial commands HMP260-U017en-1.5 MTIM <cr> Mtim 5 <cr> MTIM 5 <cr> Mtim : PRES Setting the pressure for mixing ratio and wet bulb calculations PRES pppp.pp <cr> pppp.pp = pressure (hPa) The atmospheric pressure has an effect on mixing ratio and wet bulb. Accurate calculations can be achieved only when the ambient pressure is taken into consideration. -
Page 86: Cdate Entering Calibration Date
HMP260 SERIES HMP260-U017en-1.5 Appendix 1: Serial commands or pressure is set to zero using XPRES. After this the pressure stored using command PRES is valid again. CDATE Entering calibration date CDATE xxxxxx <cr> xxxxxx = calibration date (000101...991231) When the latest calibration date has to kept in memory, it is entered as follows: CDATE 940506 <cr>... -
Page 87: Vers Name And Version Of The Programme
HMP260 SERIES Appendix 1: Serial commands HMP260-U017en-1.5 VERS Name and version of the programme VERS <cr> For example: VERS <cr> HMPS 260 / x.yy where x.yy is the programme version. Outputting the transmitter settings ? <cr> For example: ? <cr>... -
Page 88: Appendix 2 Safety Summary
HMP260 series transmitters. Some of these warnings and cautions also appear in other places in this operating manual but are repeated here for emphasis. - Page 89 HMP260 SERIES Appendix 2: Safety summary HMP260-U017en-1.5 CAUTION Only fuses with the required current rating and of the specified type may be used. Do not use a substitute for the right fuse and never short-circuit the fuse holder. WARNING Always use the grounding terminal to connect the transmitter to safety ground.
- Page 90 HMP260 SERIES HMP260-U017en-1.5 Appendix 3: RS 485/422 serial port module INSTALLING AND USING THE RS 485/422 SERIAL PORT MODULE INSTALLATION......................2 OPERATION........................ 3 NETWORK CONFIGURATION ..................5 Single loop operation ....................5 Dual loop operation ....................7 CHECKING THE SERIAL PORT NETWORK OPERATION......... 9 STOP mode ........................
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Page 91: Installation
HMP260 SERIES Appendix 3: RS 485/422 serial port module HMP260-U017en-1.5 INSTALLATION Switch the transmitter off. Resistors R2, R3 and R4 between connectors X4 and X5 in the component board in the cover of the transmitter are removed with side-cutting pliers. The module is plugged in connectors X4 and X5 on the main board of the HMP260 transmitter;... -
Page 92: Operation
HMP260 SERIES HMP260-U017en-1.5 Appendix 3: RS 485/422 serial port module OPERATION The HMP260 transmitters can either be given an address or operated without an address. Both single and dual loop wiring with half duplex connection can be used. No address is needed when only one HMP260 transmitter is used;... - Page 93 HMP260 SERIES Appendix 3: RS 485/422 serial port module HMP260-U017en-1.5 The RS 485/422 module has separate lines for transmitting and receiving, but they can be connected together with jumpers. Dual loop connection is the factory setting; when a single loop connection is used, the positions of jumpers in connector X4 on the module must be changed.
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Page 94: Network Configuration
HMP260 SERIES HMP260-U017en-1.5 Appendix 3: RS 485/422 serial port module NETWORK CONFIGURATION Single loop operation Bidirectional data on one pair is one of the great advantages of the RS 485 line. Set jumpers in connector X4 on the module board as shown in the figure below. -
Page 95: Dual Loop Operation
HMP260 SERIES Appendix 3: RS 485/422 serial port module HMP260-U017en-1.5 Set the address of the transmitter; it can be any number between 1 and 99. In this example the address is 22: >addr 22 Address Set the serial bus settings according to your network specifications. - Page 96 HMP260 SERIES HMP260-U017en-1.5 Appendix 3: RS 485/422 serial port module Open the transmitter cover. Pull out the RS 485/422 serial port module, if it is already mounted. Set the serial port of the terminal to 4800 baud, even parity, seven data bits and one stop bit, full duplex (4800 E 7 1 FDX).
- Page 97 HMP260 SERIES Appendix 3: RS 485/422 serial port module HMP260-U017en-1.5 NOTE 2 The transmitter outputs no prompt (>) after the SMODE POLL command and it only reacts to commands which include its address. Check that the transmitter responds to its address: >send 22...
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Page 98: Checking The Serial Port Network Operation
HMP260 SERIES HMP260-U017en-1.5 Appendix 3: RS 485/422 serial port module CHECKING THE SERIAL PORT NETWORK OPERATION Normally measurement readings are asked when the transmitter is in POLL mode; the command must then include the address of the transmitter. If the settings of the transmitter need to be changed, the transmitter is switched to STOP mode with command OPEN;... -
Page 99: Poll Mode
HMP260 SERIES Appendix 3: RS 485/422 serial port module HMP260-U017en-1.5 POLL mode If a transmitter has been set to POLL mode, it will respond only to commands sent with its address: send 22 RH= 24.4 %RH T= 29.1 'C Addresses from 1 to 99 can be used. According to the RS 485/422 standard a maximum of 32 devices can be connected on same bus, but the number can be increased if the line length and/or baud rate is reduced. -
Page 100: Specifications
HMP260 SERIES HMP260-U017en-1.5 Appendix 3: RS 485/422 serial port module SPECIFICATIONS Connections Berg sockets on the main board screw terminals 0.5 mm² wires, stranded wires recommended Assembly plug-in module Board dimensions 40 x 28 mm Operating mode half duplex (single or dual pair wiring) - Page 101 HMP260 SERIES HMP260-U017en-1.5 Appendix 4: Digital current loop module INSTALLING AND USING THE DIGITAL CURRENT LOOP MODULE INSTALLING AND USING THE DIGITAL CURRENT LOOP MODULE ........1 INSTALLATION ......................2 OPERATION......................... 3 NETWORK CONFIGURATION ..................5 Single loop operation ....................5 Single loop wiring.......................
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Page 102: Installation
HMP260 SERIES Appendix 4: Digital current loop module HMP260-U017en-1.5 INSTALLATION Switch the transmitter off. Resistors R2, R3 and R4 between connectors X4 and X5 in the component board in the cover of the transmitter are removed with side-cutting pliers. The module is plugged in connectors X4 and X5 on the main board of the HMP 260 transmitter;... -
Page 103: Operation
HMP260 SERIES HMP260-U017en-1.5 Appendix 4: Digital current loop module OPERATION The HMP260 transmitters can either be given an address or operated without an address. Both single and dual loop wiring with half duplex connection can be used. No address is needed when only one HMP260 transmitter is used; when several transmitters are connected to the same line, each transmitter must be given an address in the initial configuration. - Page 104 HMP260 SERIES Appendix 4: Digital current loop module HMP260-U017en-1.5 The digital current loop module has separate lines for transmitting and receiving. Both single loop wiring and dual loop wiring can be used (see figure). Dual loop connection makes it possible to have a few more transmitters on the same loop pair. A single loop connection has simpler wiring.
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Page 105: Network Configuration
HMP260 SERIES HMP260-U017en-1.5 Appendix 4: Digital current loop module NETWORK CONFIGURATION Single loop operation Bidirectional data on one pair and galvanic isolation are the advantages of the current loop. Single pair/dual pair use is configured through wiring (see figure on page 3). -
Page 106: Dual Loop Operation
HMP260 SERIES Appendix 4: Digital current loop module HMP260-U017en-1.5 Set the transmitter in POLL mode: >smode poll Serial mode : POLL NOTE 1 The SMODE command must be given last. NOTE 2 The transmitter outputs no prompt (>) after the SMODE POLL command and it only reacts to commands which include its address. -
Page 107: Dual Loop Wiring
HMP260 SERIES HMP260-U017en-1.5 Appendix 4: Digital current loop module Dual loop wiring Set the address of the transmitter, it can be any number between 1 and 99. In this example the address is 22: >addr 22 Address Set the serial bus settings according to your system. This setting will become valid after next RESET or power off: >seri 2400 e 7 1 f... -
Page 108: Checking The Serial Port Network Operation
HMP260 SERIES Appendix 4: Digital current loop module HMP260-U017en-1.5 CHECKING THE SERIAL PORT NETWORK OPERATION Normally measurement readings are asked when the transmitter is in POLL mode; the command must then include the address of the transmitter. If the settings of the transmitter need to be changed, the transmitter is switched to STOP mode with command OPEN;... -
Page 109: Poll Mode
HMP260 SERIES HMP260-U017en-1.5 Appendix 4: Digital current loop module POLL mode If a transmitter has been set to POLL mode, it will respond only to commands sent with its address: send 22 RH= 24.4 %RH T= 29.1 'C Addresses from 1 to 99 can be used. According to the 20 mA current loop standard current flows with no transmission on line. -
Page 110: Specifications
HMP260 SERIES Appendix 4: Digital current loop module HMP260-U017en-1.5 SPECIFICATIONS Galvanic isolation 1500 VAC/DC max. (1 min) Loop supply voltage 40 V max. Loop supply current 20 mA nominal must be current limited Operating loop voltage requirement 4 V/each transmitter (TX+/TX-) -
Page 111: Appendix
HMP260 SERIES HMP260-U017en-1.5 Appendix 5: Error messages ERROR MESSAGES The HMP260 transmitters go through a self-diagnostics procedure when the power is switched on. When the procedure does not reveal any errors or faults, the transmitter starts operating normally. If errors or faults are found, the transmitter outputs an error message. -
Page 112: Appendix
HMP260 SERIES Appendix 5: Error messages HMP260-U017en-1.5 Errors during operation There are two types of errors that may occur during the operation of the transmitters. The first type indicates that no frequency comes from the converter. Display: Serial bus: E40 f (all ) out of range... -
Page 113: Appendix
HMP260 SERIES HMP260-U017en-1.5 Appendix 5: Error messages The LEDs indicate these errors as follows: ¡¡¤¤ no frequency at all ¡¡¤¡ a frequency missing from the RH channel ¡¡¡¤ a frequency missing from the T channel The second error type indicates erroneous y-values (used in internal calculations):... -
Page 114: Appendix
HMP260 SERIES HMP260-U017en-1.5 Appendix 6: Calculation formulas CALCULATION The HMP260 series transmitters measure relative humidity and temperature. From these values dewpoint, mixing ratio and absolute humidity are calculated using the following equations dewpoint: 621 98 mixing ratio: p RH P... - Page 115 However, at ambient pressures significantly above normal atmospheric pressure corrections should be made. The pressure correction of P not included in the software of HMP260 series and therefore it must be made separately. When using the HMP264 at ambient pressures significantly above normal atmospheric pressure, an enhancement factor f can be used to correct P .
- Page 116 Design Date Review Date Appr Change Reason/ ECO no Note ! The cable shield has to be connected to the cable bushing for full EMC protection. Main board HMP230 In automation system galvanically isolated inputs Channel1+ Humidity and are recommended for current signals temperature outputs Channel1- current/voltage...
- Page 117 Design Date Review Date Appr Change Reason/ ECO no Installation examples of intrinsically safe operation for transmitter types HMP263/264/265. HMP263/264/265 SAFE AREA HAZARDOUS AREA [EEx ia] IIC EEx ia IIC T3/T4 Probe types and cable length max. 10 m example installations: to be sealed use connectors HMP263 probes...
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Page 118: Appendix 9 Approvals And Specifications Of The Protection Unit
HMP260 SERIES HMP260-U017en-1.5 Appendix 9: Approvals APPROVALS AND SPECIFICATIONS OF THE PROTECTION UNIT The transmitter conforms to the European Standards EN 50014 and EN 50020 and meets the requirements with the following marking of the type and protection: transmitter [EEx ia] IIC and sensor heads EEx ia IIC T3/T4.