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Vaisala HMP230 SERIES Operating Manual

Vaisala HMP230 SERIES Operating Manual

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HMP230 SERIES
TRANSMITTERS
Operating Manual
U116en-2.2
April 1998
Vaisala 1998

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Summary of Contents for Vaisala HMP230 SERIES

  • Page 1 HMP230 SERIES TRANSMITTERS Operating Manual U116en-2.2 April 1998 Vaisala 1998...
  • Page 2 © Vaisala Oy 1998 No part of this document may be reproduced in any form or by any means, electronic or mechanical (including photocopying), nor may its contents be communicated to a third party without prior written permission of the copyright holde.

  • Page 3: Table Of Contents

    HMP230 SERIES U116en-2.2 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. Mounting the HMP231................5 3.2.2. Installing the HMP233, HMP234 and HMP235 ........... 5 3.2.3.
  • Page 4 HMP230 SERIES Operating Manual U116en-2.2 5.3.7.4. Setting the time ..................40 5.4. Serial commands ....................42 5.4.1. Analogue output commands ..............42 5.4.1.1. Setting the analogue outputs ..............42 5.4.1.2. Selecting and scaling the analogue output quantities ........ 43 5.4.1.3. Scaling the analogue outputs..............43 5.4.2.
  • Page 5 HMP230 SERIES U116en-2.2 Operating Manual 7.4. Temperature channel adjustment with Pt 100 simulators........63 7.4.1. Adjustment using serial commands ............63 7.4.2. Adjustment using display commands............64 7.4.3. Adjustment using LED commands ............64 7.5. Measurement of output currents using test points..........65 7.6.
  • Page 6 HMP230 SERIES Operating Manual U116en-2.2 This page intentionally left blank.

  • Page 7: Product Description

    U116en-2.2 Operating Manual PRODUCT DESCRIPTION The HMP230 series transmitters are microprocessor based instruments for the measurement of relative humidity and temperature; from these variables they can calculate dewpoint temperature, absolute humidity, mixing ratio, wet bulb temperature and enthalpy. The transmitters have two analogue outputs and they can be connected to a serial bus via the RS 232C interface or through an RS 485/422 serial module or a current loop module.
  • Page 8 HMP230 SERIES Operating Manual U116en-2.2 Options Calculation vari- dewpoint temperature, mixing ratio, absolute hu- ables midity, wet bulb temperature, enthalpy Power supply 24 VDC (standard), (for 24 VAC, see page 22) 115/230 VAC Serial interface RS 232C (standard), RS 485/422, current loop Display cover cover with or without local display &...

  • Page 9: To Be Noted When Measuring Humidity

    HMP230 SERIES U116en-2.2 Operating Manual 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 tempera- ture between the measured object and the sensor causes an error. If the tem- perature is +20 °C (+68 °F) and the relative humidity 50 %RH, a difference of...

  • Page 10: Installation

    HMP230 SERIES Operating Manual U116en-2.2 INSTALLATION 3.1. Selecting the place of installation Choose a place which gives a true picture of the environment or process, and is as clean as possible. Air should circulate freely around the sensor. A rapid air flow is recommended;...

  • Page 11: Mounting

    HMP230 SERIES U116en-2.2 Operating Manual 3.2. Mounting 3.2.1. Mounting the HMP231 The best position for mounting the HMP231 is with the probe head pointing downwards. Due to internal heat transfer, the transmitter should not be mounted with the probe pointing upwards.

  • Page 12: Hmp233 Transmitter

    HMP230 SERIES Operating Manual U116en-2.2 NOTE During installation the sensor head must not be unsol- dered from and again resoldered to the main printed board of the transmitter. This procedure may damage the humidity calibration of the transmitter. 3.2.3. HMP233 transmitter The HMP233 can be installed in ducts and channels with the help of the in- stallation kit available;...

  • Page 13: Hmp234 Transmitter

    HMP230 SERIES U116en-2.2 Operating Manual The sensor head can also be installed vertically. When a bushing is used, its size is selected according to the diameter of the sensor head; the diameter of the cable is increased by using e.g. tape at the bushing...
  • Page 14 HMP230 SERIES Operating Manual U116en-2.2 sealing washer fitting body nut tightening cone 4. Mark both the fitting body and the nut hex. A pen fitting body 5. Tighten the nut a further 30° (1/12 turn) or if you have a torque span- ner tighten it with a torque of 80 ±10 Nm.
  • 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 Figure 3.4...

  • Page 16: Hmp235 Transmitter

    HMP230 SERIES Operating Manual U116en-2.2 3.2.5. HMP235 transmitter to be sealed to be insulated Figure 3.5 Installing a transmitter in a process with the sensor head horizontally to be sealed to be insulated Figure 3.6 Installing a transmitter in a process with the sensor head...

  • Page 17: Hmp238 Transmitter

    HMP230 SERIES U116en-2.2 Operating Manual Figure 3.7 Mounting the sensor head on a duct or channel When the sensor head is installed in a duct or channel, the temperature differ- ence between the air in the duct and outside it must be small as the sensor head conducts heat.

  • Page 18: Mounting; Overview

    HMP230 SERIES Operating Manual U116en-2.2 PROBE PROBE UP cable length PUSHED 2, 5 or 10 m ø5.5 DOWN clasp nut fitting body non leaking screw (A) (factory setting) or leak screw (B) adjustment (included in the package) range120 mm R1/2 ISO 7/1 ø13.5...
  • Page 19 HMP230 SERIES U116en-2.2 Operating Manual that the minimum recommended distance of the fitting body and probe head is 40 mm (see Figure 3.9). Adjust the probe to a suitable distance according to the type of installation and tighten the clasp nut first manually; mark the fitting body and the clasp nut and tighten the nut a further 50...60 with a fork spanner (see Figure 3.10).
  • Page 20 HMP230 SERIES Operating Manual U116en-2.2 capped nut DIN 917-M22x1.5 when the probe is pulled out for maintenance, cap sealing the hole with a capped nut; this way, the process can be open although the probe is not in place Non leaking screw...

  • Page 21: Installing The Probe Through The Ball Valve Assembly

    HMP230 SERIES U116en-2.2 Operating Manual 3.2.6.2. Installing the probe through the ball valve assembly The best way to install the sensor head is through the ball valve assembly. Use a 1/2” ball valve assembly with a ball hole of 14 mm or more. In this kind of installation, it is not necessary to empty or shut down the process for installing or removing the sensor head.
  • Page 22 HMP230 SERIES Operating Manual U116en-2.2 See Figure 3.13 through Figure 3.15 for detailed description of installation through the ball valve assembly. This installation is possible provided that the process pressure is less than 10 bars. Note also that if the sensor head is installed in a process pipe, the nominal size of the pipe must be at least 1 inch.
  • Page 23 HMP230 SERIES U116en-2.2 Operating Manual STEP 2: open the ball valve assembly manual press tool probe pipe ø5.5 marking groove fitting ferrule clasp nut handle (hex 27 mm) fitting body leak screw (B) (hex. 24 mm) (hex. 1.5 mm) ø14...
  • Page 24 HMP230 SERIES Operating Manual U116en-2.2 STEP 3: push the probe head through the ball valve assembly into the process. If the pressure is high, use a manual press tool. Note that the sensor head must be pushed so deep that the filter is completely inside the process flow.

  • Page 25: Grounding

    HMP230 SERIES U116en-2.2 Operating Manual gas escape channel: use this position for NOTE by-pass measurements keep the marking groove in sight when leak screw (B) O-ring using leak screw (B) sintered filter DRYCAP® sensor process pipe or chamber Figure 3.16...
  • Page 26 HMP230 SERIES Operating Manual U116en-2.2 slip the brass disk that has the bigger hole in it over the braid so that it rests against the cable insulation slip the other brass disk over the wires to the middle of the braid flexible wires 0.5 mm²...

  • Page 27: Electrical Connections

    HMP230 SERIES U116en-2.2 Operating Manual NOTE When the cable is grounded as above, the metallic parts of the sensor head, the shield of its cable, the transmit- ter housing and the shield of the signal cable to external system are all connected to each other. After this the whole system can be grounded from one point only.

  • Page 28: Connection To A 24 Vac Supply

    HMP230 SERIES Operating Manual U116en-2.2 Power supply 24 VDC 24 VAC (see page 22) with power supply module 115/230 VAC Output signals 0...20 mA, 4...20 mA 0...1 V, 0...5 V, 0...10 V Power supply ground (-) is connected to the housing with parallel connection of 15 nF capacitor and 300 k resistor.

  • Page 29: Commissioning

    HMP230 SERIES U116en-2.2 Operating Manual COMMISSIONING When HMP230 transmitters leave the factory, their measurement ranges and output signals have already been scaled according to the order form completed by the customer. Units are calibrated at the factory and ready to operate when the power is turned on.

  • Page 30: Selecting The Analogue Outputs

    When the security lock jumper is connected, some commands cannot be used, see Chapter 5. If you wish to take into use variables that are not included in the configuration of your transmitter, contact Vaisala or a Vaisala representative. 4.3. Selecting the analogue outputs The HMP230 transmitters can be ordered with the required current or voltage outputs already selected.
  • Page 31 HMP230 SERIES U116en-2.2 Operating Manual CH1 CH2 CURRENT OUTPUTS 0 ... 20 / 4 ... 20 mA CH1 CH2 VOLTAGE OUTPUTS 0 ... 5 V / 0 ... 10 V CH1 CH2 VOLTAGE OUTPUTS 0 ... 1 V CH1 CH2 CH1 0 ...

  • Page 32: Connecting The Rs 232C Serial Bus

    HMP230 SERIES Operating Manual U116en-2.2 spare jumpers OPENED COVER OF THE HMP230 Figure 4.3 Spare jumpers 4.4. Connecting the RS 232C serial bus OPENED COVER OF THE HMP230 Figure 4.4 Serial bus connections To connect a PC to the HMP230 transmitters via the RS 232C serial bus, one of the following cables is required.
  • Page 33 HMP230 SERIES U116en-2.2 Operating Manual HMP 23 D25S TERMINAL D25P Figure 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 program (e.g.

  • Page 34: Reverting To Factory Settings Of The Serial Port

    HMP230 SERIES Operating Manual U116en-2.2 In calibrating or changing the settings of the transmitter it can be more con- venient to use the connector X17, if connector X6 is already in use. This con- nector, however, transfers only RS 232C signals. If an RS 485/422 serial port module or a current loop module has been installed, it has to be removed be- fore communicating through the X17 connector.
  • Page 35 HMP230 SERIES U116en-2.2 Operating Manual When the jumper is inserted the serial line factory settings become valid, but only temporarily. The transmitter must be given new settings; otherwise the transmitter uses the old, unknown settings after power-up. When the new settings have been given, the transmitter must be reset. The jumper must be removed before the transmitter is reset;...

  • Page 36: Commands

    HMP230 SERIES Operating Manual U116en-2.2 COMMANDS The HMP230 transmitters use microprocessors; therefore their configuration can be set according to the user’s needs. This is done through commands, either utilizing the menus on the local display or giving commands through the serial interface (see Appendix 1). Most often the commands are used to change the settings of the two analogue channels.

  • Page 37: Led Commands

    HMP230 SERIES U116en-2.2 Operating Manual 5.2. 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 calibra- tion of the analogue outputs.

  • Page 38: Display/Keypad Commands

    HMP230 SERIES Operating Manual U116en-2.2 5.3. 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. The first line is scrolled with button and the second line with button .

  • Page 39: Analogue Output Commands

    HMP230 SERIES U116en-2.2 Operating Manual 5.3.4. Analogue output commands 5.3.4.1. Selecting the output (mA/V) Disconnect the security lock jumper! Select in the main menu and in the Mode menu: Select . The current settings for channel 1 are dis- played: If the settings are correct, press ENT.

  • Page 40: Selecting And Scaling The Analogue Output Quantities

    HMP230 SERIES Operating Manual U116en-2.2 5.3.4.2. Selecting and scaling the analogue output quantities Disconnect the security lock jumper! Select in the main menu and in the Mode menu: Select . The quantity and scaling for channel 1 are displayed: If the settings are correct, press ENT.

  • Page 41: Output Via The Serial Bus

    HMP230 SERIES U116en-2.2 Operating Manual 5.3.5. Output via the serial bus 5.3.5.1. Turning the serial interface echo ON/OFF Select in the main menu, select in the More menu and select in the second More menu. Use the arrow keys to select the right alternative and press ENT.

  • Page 42: Setting The Transmitter Address

    HMP230 SERIES Operating Manual U116en-2.2 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 HMP230 program will change the number of stop bits to 2...

  • Page 43: Selecting The Output Units

    HMP230 SERIES U116en-2.2 Operating Manual 5.3.5.4. Selecting the output units Select in the main menu: Use the arrow keys to select the right alternative and press ENT. quantity metric non-metric RH = relative humidity T = temperature °C °F Td = dewpoint temperature °C...

  • Page 44: Setting The Serial Interface Operation Mode

    HMP230 SERIES Operating Manual U116en-2.2 the connection returns the transmitter to POLL state. In POLL state the transmitter outputs measurement only when requested (command SEND aa). If the user has forgotten the address of the transmitter and the transmitter does not have a display, the transmitter has to be reverted to the factory settings (see Chapter 4.4.1).

  • Page 45: Others

    HMP230 SERIES U116en-2.2 Operating Manual 5.3.7. Others 5.3.7.1. Setting the averaging time Disconnect the security lock jumper! With command FILT the transmitter can be given the averaging time during which the individual measurement samples are integrated to get an averaged reading.

  • Page 46: Setting The Date

    HMP230 SERIES Operating Manual U116en-2.2 Select in the main menu: Select Pressing ENT returns the program to the main menu without changing the pressure reading. If the pressure needs to be changed, press CL; enter the new pressure with the arrow keys 5.3.7.3.
  • Page 47 HMP230 SERIES U116en-2.2 Operating Manual first the hours (14) start flashing; use the arrow keys to change them and press ENT the minutes (25) start flashing; use the arrow keys to change them and press ENT the seconds (32) start flashing; use the arrow keys to change them...

  • Page 48: Serial Commands

    HMP230 SERIES Operating Manual U116en-2.2 5.4. 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 HMP230 transmitters to serial bus are given in Chapter 4.4.

  • Page 49: Selecting And Scaling The Analogue Output Quantities

    HMP230 SERIES U116en-2.2 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: = relative humidity = temperature = dewpoint temperature = absolute humidity = mixing ratio...

  • Page 50: Output Via The Serial Bus

    HMP230 SERIES Operating Manual U116en-2.2 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 command that can be used is S (stop). The output mode can be changed with command FORM (see Appendix 1).

  • Page 51: Setting The Output Interval For The Run Mode

    HMP230 SERIES U116en-2.2 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 52: Selecting The Output Units

    HMP230 SERIES Operating Manual U116en-2.2 5.4.2.6. Selecting the output units UNIT x <cr> m(etric units) n(on-metric units) quantity metric non-metric RH = relative humidity T = temperature °C °F Td = dewpoint temperature °C °F a = absolute humidity gr/ft...

  • Page 53: Setting The Calculation Mode

    HMP230 SERIES U116en-2.2 Operating Manual 5.4.2.9. Setting the calculation mode Disconnect the security lock jumper! FROST ON/OFF <cr> This command is used to select whether the transmitter calculates the frostpoint or the dewpoint (default) reading at dewpoint temperatures below C. Select FROST ON for frostpoint and FROST OFF for dewpoint calculations.

  • Page 54: Open & Close

    HMP230 SERIES Operating Manual U116en-2.2 Example: setting STOP state >SMODE STOP <cr> Serial mode : STOP 5.4.3.2. OPEN & CLOSE OPEN nn <cr> address of the transmitter (0...99) CLOSE <cr> In STOP mode: command OPEN has no effect, CLOSE sets the transmitter in...

  • Page 55: Calibration

    Humidity calibration The calibration of the HMP230 transmitters can be checked with a calibrated Vaisala humidity meter, such as the HM34. The HMI41 indicator or the HMI38 data processor with an appropriate reference connection cable can be used as a field calibrator. A two-point calibration can be made with the HMK15 or with the HMK13B Calibrator or the instrument can be sent to Vaisala.

  • Page 56: One Point Calibration Procedure

    HMP230 SERIES Operating Manual U116en-2.2 6.1.1. One point calibration procedure The HMI38 humidity data processor or the HMI41 indicator can be used as a one-point field calibrator. Two point calibration using the HMI38 is also possible if two different humidity points (differing more than 50 %RH from each other) can be provided.

  • Page 57: With Display/Keypad Commands

    HMP230 SERIES U116en-2.2 Operating Manual 6.1.1.2. With display/keypad commands 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.

  • Page 58: With Serial Commands

    HMP230 SERIES Operating Manual U116en-2.2 6.1.2.1. With serial commands Leave the calibrator and the transmitter for at least 4 hours in the same space so that their temperatures have time to equalize. Remove the filter cap on the transmitter. Disconnect the security lock jumper! Insert the sensor head into a measurement hole of the LiCl chamber in the humidity calibrator.

  • Page 59: With Led Commands

    HMP230 SERIES U116en-2.2 Operating Manual Insert the sensor head into a measurement hole of the NaCl chamber. Wait at least 10 minutes. If necessary, change the second point reading with the arrow keys and press ENT. 6.1.2.3. With LED commands Leave the calibrator and the transmitter for at least 4 hours in the same space so that their temperatures have time to equalize.

  • Page 60: With Display/Keypad Commands

    HMP230 SERIES Operating Manual U116en-2.2 Give command FCRH <cr>, enter the first point value and press <cr>: >FCRH <cr> RH : xx.x Ref1 ? yy.y <cr> Press any key when ready... The stabilization of the sensor to the reference humidity can be monitored by giving c <cr>:...
  • Page 61 HMP230 SERIES U116en-2.2 Operating Manual Wait at least 10 minutes. Connect an ammeter/voltmeter to the analogue outputs (connector X2). Give command . At the first calibration point the LED on the left flashes; adjust the first point with the arrow switches to the value given in the calibration table (Chapter 6.1.4) and press ENT...

  • Page 62: Humidity Calibration Table

    HMP230 SERIES Operating Manual U116en-2.2 6.1.4. Humidity calibration table Table 1 Greenspans’s calibration table Temperature °C °F LiCl 11.3 11.3 11.3 11.3 4...20 mA 5.81 5.81 5.81 5.81 0...20 mA 2.26 2.26 2.26 2.26 0...1 V 0.113 0.113 0.113 0.113 0...5 V...

  • Page 63: With Display/Keypad Commands

    HMP230 SERIES U116en-2.2 Operating Manual If you want to see how the sensor stabilizes to the reference temperature, enter c <cr> instead of the first reference: T : 0.90 Ref1 ? c <cr> T : 0.55 Ref1 ? c <cr>...

  • Page 64: Two Point Temperature Calibration

    HMP230 SERIES Operating Manual U116en-2.2 6.2.2. Two point temperature calibration 6.2.2.1. With serial commands 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 65: With Led Commands

    HMP230 SERIES U116en-2.2 Operating Manual Check that the reading corresponds with the reading of the reference instrument. If not, adjust the second point. If necessary, change the second point reading with the arrow keys and press ENT. 6.2.2.3. With LED commands 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 66: With Display/Keypad Commands

    HMP230 SERIES Operating Manual U116en-2.2 >ACAL <cr> U1 ( V ) ? 2.233 <cr> U2 ( V ) ? 8.25 <cr> U1 ( V ) ? 2.218 <cr> U2 ( V ) ? 8.23 <cr> 6.3.2. With display/keypad commands Disconnect the security lock jumper!
  • Page 67 HMP230 SERIES U116en-2.2 Operating Manual the second LED from the left flashes; set the high end of channel 1 with the arrow keys and press ENT the LED on the left flashes; set the low end of channel 2 with the ar- row keys and press ENT the second LED from the left flashes;...

  • Page 68: Maintenance

    If errors or faults are found, check first 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 5.

  • Page 69: Changing The Humicap ® Sensor And The Filter

    HMP230 SERIES U116en-2.2 Operating Manual When errors have occurred, the transmitter outputs the error code (see Appen- dix 5 for all error messages): >ERRS <cr> ( all ) out of range > ® 7.3. Changing the HUMICAP sensor and the filter Remove the damaged sensor and insert a new one.

  • Page 70: Adjustment Using Display Commands

    HMP230 SERIES Operating Manual U116en-2.2 Set the Pt 100 simulator at the highest temperature to be calibrated and press any key. Enter the second point (gain) reference reading. If second reference is not needed, press <cr> to complete one point offset correction.

  • Page 71: Measurement Of Output Currents Using Test Points

    HMP230 SERIES U116en-2.2 Operating Manual 7.5. Measurement of output currents using test points If a current output has been connected e.g. to a process computer, the output current cannot be measured at the output connector X2 without disconnecting the external load. The output current can, however, be measured at test points CH1+/CH1- and CH2+/CH2- without disconnecting the output wires.

  • Page 72: Technical Data

    HMP230 SERIES Operating Manual U116en-2.2 TECHNICAL DATA 8.1. Relative humidity Measuring range 0...100 %RH Accuracy (including nonlinearity and repeatability) maximum achievable accuracy when calibrated against high quality, certified humidity standards: ±1 %RH (0...90 %RH) ±2 %RH (90...100 %RH) when calibrated against salt solutions (ASTM E104-85): ±2 %RH (0...90 %RH)
  • Page 73 HMP230 SERIES U116en-2.2 Operating Manual Typical ranges - HMP233/234/235/238 dewpoint temperature -40...+100 °C mixing ratio 0...500 g/kg dry air absolute humidity 0...600 g/m wet bulb temperature 0...+100 °C enthalpy -40…+1500 kJ/kg Accuracies of the calculated quantities depend on the accuracies of the meas- ured quantities: relative humidity and temperature.

  • Page 74: Pressure

    HMP230 SERIES Operating Manual U116en-2.2 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 75: Electronics

    HMP230 SERIES U116en-2.2 Operating Manual 8.6. Electronics User interface 3 keys and 4 LEDs inside the housing or local display keypad Display 2 x 16 character alphanumeric high-contrast, wide view angle character height 3.85 mm (0.15") Keyboard 1 x 4 keypad Connections screw terminals, 0.5 mm...

  • Page 76: Mechanics

    HMP230 SERIES Operating Manual U116en-2.2 8.7. Mechanics Housing material G-AlSi12 (DIN 1725) Housing classification IP 65 (NEMA 4) Bushing for 7...10 mm diameter cable (8 x 0.5 mm shielded cable) Sensor protection stainless steel sintered filter (part no. 16452) PPS grid with stainless steel netting (part no.
  • Page 77 HMP230 SERIES U116en-2.2 Operating Manual cable length 2000, 5000 or 10 000 mm Figure 8.1 HMP233 sensor head dimensions Fitting body hex=27 cable length 2000, Nut hex=32 5000 or 10000 mm Figure 8.2 HMP234 sensor head dimensions cable length Ø 9.5 2000, 5000 Ø...

  • Page 78: Electromagnetic Compatibility

    HMP230 SERIES Operating Manual U116en-2.2 8.8. Electromagnetic compatibility The emission and immunity tests have been performed according to standards EN50081-1 and EN50082-2, except for the HMP233 low temperature version (80 C), the tests of which have been performed according to standards EN50081-1 and EN50082-1.

  • Page 79: Emissions

    HMP230 SERIES U116en-2.2 Operating Manual 8.8.1. Emissions Test: Setup according to: Radiated interference EN55022 (class B) With power supply unit (HMP230PW): Conducted interference EN55022 (class B) Harmonic currents EN61000-3-2 Voltage fluctuations EN61000-3-3 8.8.2. Immunity Test: Setup according to: Performance: Electrostatic discharge...

  • Page 80: Spare Parts And Options

    HMP230 SERIES Operating Manual U116en-2.2 SPARE PARTS AND OPTIONS Order code Description HMP235FS Mounting flange for HMP235, stainless steel HMP235FA Mounting flange for HMP235, aluminium HMP233FA Mounting kit for HMP233, +80 °C cable HMP233FAH Mounting kit for HMP233, +120 °C cable...

  • Page 81: Appendix 1 Serial Commands

    HMP230 SERIES U116en-2.2 Appendix 1: Serial commands SERIAL COMMANDS ANALOGUE OUTPUT COMMANDS................... 76 AMODE Setting the analogue outputs ..............76 ASEL Scaling the analogue outputs..............77 ASCL Scaling the analogue outputs..............78 CALIBRATION COMMANDS....................79 Relative humidity calibration ..............79 FCRH Relative humidity calibration after sensor change ........

  • Page 82: Analogue Output Commands

    HMP230 SERIES Appendix 1: Serial commands U116en-2.2 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 83: Asel Scaling The Analogue Outputs

    HMP230 SERIES U116en-2.2 Appendix 1: Serial commands ASEL Scaling the analogue outputs Disconnect the security lock jumper! ASEL xxx yyy <cr> channel 1’s quantity channel 2’s quantity: = relative humidity = temperature = dewpoint temperature = absolute humidity = mixing ratio...

  • Page 84: Ascl Scaling The Analogue Outputs

    HMP230 SERIES Appendix 1: Serial commands U116en-2.2 ASCL Scaling the analogue outputs Disconnect the security lock jumper! ASCL <cr> Scales the outputs selected on channels 1 and 2. For example, scaling relative humidity on the range of 0...100 %RH and tem- perature -40...+160 °C:...

  • Page 85: Calibration Commands

    HMP230 SERIES U116en-2.2 Appendix 1: Serial commands 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 86: Ct Temperature Calibration

    HMP230 SERIES Appendix 1: Serial commands U116en-2.2 The command can also be divided into two commands, so the computer can be used for other purposes while waiting for the sensor to stabilize to the higher humidity. >FCRH 1 <cr> 1.90 Ref1 ? 11.3 <cr>...

  • Page 87: Acal Calibrating The Analogue Outputs

    HMP230 SERIES U116en-2.2 Appendix 1: Serial commands ACAL Calibrating the analogue outputs Disconnect the security lock jumper! ACAL <cr> Calibrates the outputs selected on channels 1 and 2. The output is measured and the measured values (mA or V) entered as calibration coefficients.

  • Page 88: Output Via The Serial Bus

    HMP230 SERIES Appendix 1: Serial commands U116en-2.2 NOTE The temperature unit in offset correction is always de- grees Centigrade, even if the transmitter is using non- metric units (Fahrenheit) in its measurement output. OUTPUT VIA THE SERIAL BUS Starting the measurement output R <cr>...

  • Page 89: Send Outputting A Reading Once

    HMP230 SERIES U116en-2.2 Appendix 1: Serial commands SEND Outputting a reading once SEND <cr> in STOP state SEND aa <cr> in POLL state address of the transmitter when more than one transmitter is connected to a serial bus (0...99; set with command ADDR) Outputs the current measurement readings via the serial line.

  • Page 90: Echo Turning The Serial Interface Echo On/Off

    HMP230 SERIES Appendix 1: Serial commands U116en-2.2 If there are no error messages, only a prompt is displayed: >ERRS <cr> > If errors have occurred, the transmitter outputs the error code (see Appendix 5 for error messages): >ERRS <cr> ( all ) out of range >...

  • Page 91: Form Setting The Output Format

    HMP230 SERIES U116en-2.2 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 state and by SEND command. Please note that capital and small letters have dif- ferent meanings.

  • Page 92: Ftime Adding Time To Output

    HMP230 SERIES Appendix 1: Serial commands U116en-2.2 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> ON or OFF When FTIME is activated, the current time is output at the beginning of the output line.

  • Page 93: Fdate Adding Date To Output

    HMP230 SERIES U116en-2.2 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 94: Unit Selecting The Output Units

    HMP230 SERIES Appendix 1: Serial commands U116en-2.2 The processor does not allow the following combinations: no parity, 7 data bits, 1 stop bit: if this combination is given the HMP230 programme will change the number of stop bits to 2...

  • Page 95: Addr Setting The Transmitter Address

    HMP230 SERIES U116en-2.2 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 state.

  • Page 96: Operation Modes

    HMP230 SERIES Appendix 1: Serial commands U116en-2.2 Operation modes SMODE Setting the serial interface SMODE xxxx<cr> xxxx STOP, RUN or POLL In STOP mode: measurements output only by command, all commands can be used In RUN mode: outputting automatically, only command S can be used In POLL mode: measurements output only with command SEND.
  • Page 97 HMP230 SERIES U116en-2.2 Appendix 1: Serial commands When more than one transmitter is connected to the same serial bus, the POLL mode makes it possible to communicate with the transmitters. For example, a relative humidity calibration is performed at transmitter 2 (<bel> = ASCII 7): >OPEN 2 <cr>...

  • Page 98: Others

    HMP230 SERIES Appendix 1: Serial commands U116en-2.2 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 99: Filt Setting The Averaging Time

    HMP230 SERIES U116en-2.2 Appendix 1: Serial commands FILT Setting the averaging time Disconnect the security lock jumper! FILT nnnn <cr> nnnn averaging time (0 - 1024 seconds) This command is used to set and inspect the averaging time during which the individual measurement samples are integrated to get an averaged reading.

  • Page 100: Xpres Setting The Pressure For Pressure Compensation Of The Humicap Sensor And Mixing Ratio, Wet Bulb Temperature And Enthalpy Calculations Temporarily

    HMP230 SERIES Appendix 1: Serial commands U116en-2.2 When the command is given, the transmitter first gives the currently used pressure; after this a new value can be entered or the old one acknowledged: >PRES <cr> Pressure : 1013.25 1000.00 <cr>...

  • Page 101: Date Setting The Date

    HMP230 SERIES U116en-2.2 Appendix 1: Serial commands DATE Setting the date DATE <cr> For example, to enter a new date: >DATE <cr> Current date is 1993-01-30 Enter new date (yyyy-mm-dd) : 1993-06-12 <cr> When the current date is asked, the new date is passed with <cr>.

  • Page 102: Time Setting The Time

    HMP230 SERIES Appendix 1: Serial commands U116en-2.2 TIME Setting the time TIME <cr> For example, to enter a new time: >TIME <cr> Current time is 01:35:54 Enter new time (hh:mm:ss) : 13:25:56 <cr> When the current time is asked, the new time is passed with <cr>.

  • Page 103: Outputting The Transmitter Settings Also In Poll Mode

    HMP230 SERIES U116en-2.2 Appendix 1: Serial commands Outputting the transmitter settings also in POLL mode ?? <cr> Command ?? outputs the same information as command ? but it works also when the transmitter has been set to POLL mode. However, if there are more than one addressed transmitters connected to the serial bus, they all will re- spond at the same time and the output on the screen will be chaotic.

  • Page 104: Power Supply Module

    HMP230 series U116en-2.2 Appendix 2: Installing the power supply module POWER SUPPLY MODULE INSTALLING THE POWER SUPPLY MODULE............100 TECHNICAL SPECIFICATIONS ................102...

  • Page 105: Appendix 2 Installing The Power Supply Module

    HMP230 series Appendix 2: Installing the power supply module U116en-2.2 INSTALLING THE POWER SUPPLY MODULE The mains power connection may be connected to the power supply module only by an authorized electrician. A readily accessible disconnect device shall be incorporated in the fixed wiring (IEC 950).
  • Page 106 HMP230 series U116en-2.2 Appendix 2: Installing the power supply module Peel the correct power supply voltage from the sticker enclosed in the power supply module package and attach it on the instrument label to indicate that the supply voltage has been changed.

  • Page 107: Technical Specifications

    HMP230 series Appendix 2: Installing the power supply module U116en-2.2 TECHNICAL SPECIFICATIONS Operating voltage 115 VAC (93...127 V) 230 VAC (187...253 V) Connections screw terminals for 0.5... 2.5 mm wire (AWG 20...14) Bushing for 7...12 mm diameter cable Indicator PWR ON LED on power...

  • Page 108: Appendix 3 Installing And Using The Rs 485/422 Serial Port Module

    HMP230 SERIES U116en-2.2 Appendix 3: RS 485/422 serial port module INSTALLING AND USING THE RS 485/422 SERIAL PORT MODULE INSTALLATION.......................104 OPERATION ......................105 NETWORK CONFIGURATION ................107 Single loop operation ....................107 Dual loop operation ....................109 CHECKING THE SERIAL PORT NETWORK OPERATION ........111 STOP mode ......................111...

  • Page 109: Installation

    HMP230 SERIES Appendix 3: RS 485/422 serial port module U116en-2.2 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 HMP230 transmitter;...

  • Page 110: Operation

    HMP230 SERIES U116en-2.2 Appendix 3: RS 485/422 serial port module OPERATION The HMP230 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 HMP230 transmitter is used;...
  • Page 111 HMP230 SERIES Appendix 3: RS 485/422 serial port module U116en-2.2 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 jump- ers in connector X4 on the module must be changed.

  • Page 112: Network Configuration

    HMP230 SERIES U116en-2.2 Appendix 3: RS 485/422 serial port module NETWORK CONFIGURATION Single loop operation Bi-directional 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 113 HMP230 SERIES Appendix 3: RS 485/422 serial port module U116en-2.2 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 114: Dual Loop Operation

    HMP230 SERIES U116en-2.2 Appendix 3: RS 485/422 serial port module Dual loop operation The following procedure must be repeated with all transmitters. 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 115 HMP230 SERIES Appendix 3: RS 485/422 serial port module U116en-2.2 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 116: Checking The Serial Port Network Operation

    HMP230 SERIES U116en-2.2 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; then the command must include the address of the transmitter. If the settings need to be changed, the transmitter is switched to STOP mode with command OPEN;...

  • Page 117: Poll Mode

    HMP230 SERIES Appendix 3: RS 485/422 serial port module U116en-2.2 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 118: Specifications

    HMP230 SERIES U116en-2.2 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 119: Installing And Using The Digital Current Loop Module

    HMP230 SERIES U116en-2.2 Appendix 4: Digital current loop module INSTALLING AND USING THE DIGITAL CURRENT LOOP MODULE INSTALLATION.......................116 OPERATION ......................117 NETWORK CONFIGURATION ................119 Single loop operation ....................119 Single loop wiring ....................119 Dual loop operation ....................120 Dual loop wiring .....................121 CHECKING THE SERIAL PORT NETWORK OPERATION ........122 STOP mode ......................122...

  • Page 120: Installation

    HMP230 SERIES Appendix 4: Digital current loop module U116en-2.2 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 HMP230 transmitter;...

  • Page 121: Appendix 4 Installing And Using The Digital Current Loop Module

    HMP230 SERIES U116en-2.2 Appendix 4: Digital current loop module OPERATION The HMP230 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 HMP230 transmitter is used;...
  • Page 122 HMP230 SERIES Appendix 4: Digital current loop module U116en-2.2 The digital current loop module has separate lines for transmitting and receiv- ing. Both single loop wiring and dual loop wiring can be used (see figure). With dual loop connection, it is possible to have a few more transmitters on the same loop pair.

  • Page 123: Network Configuration

    HMP230 SERIES U116en-2.2 Appendix 4: Digital current loop module NETWORK CONFIGURATION Single loop operation Bi-directional 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 124: Dual Loop Operation

    HMP230 SERIES Appendix 4: Digital current loop module U116en-2.2 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 125: Dual Loop Wiring

    HMP230 SERIES U116en-2.2 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 126: Checking The Serial Port Network Operation

    HMP230 SERIES Appendix 4: Digital current loop module U116en-2.2 CHECKING THE SERIAL PORT NETWORK OPERATION Normally measurement readings are asked when the transmitter is in POLL mode; then the command must include the address of the transmitter. If the settings need to be changed, the transmitter is switched to STOP mode with command OPEN;...

  • Page 127: Poll Mode

    HMP230 SERIES U116en-2.2 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 128: Specifications

    HMP230 SERIES Appendix 4: Digital current loop module U116en-2.2 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 129 HMP230 SERIES U116en-2.2 Appendix 5: Error messages ERROR MESSAGES ERROR TYPES .......................126 Errors after reset ..................126 Errors during operation ................128...
  • Page 130 Display Serial bus E11 CPU EEPROM ackn. error - the CPU hybrid is probably damaged. Send the transmitter to Vaisala for repair. E12 CPU EEPROM checksum error - possibly due to an electrical disturbance an erroneous parameter value or an incorrect checksum has been stored in the EEPROM.

  • Page 131: Appendix 5 Error Messages

    U116en-2.2 Appendix 5: Error messages E21 PRB EEPROM ackn. error - no connection to the EEPROM including calibration information can be formed. Send the transmitter to Vaisala for repair. E22 PRB EEPROM checksum error ackn. error EEPROM is faulty checksum error...
  • Page 132 Check the temperature measurement wires and their solderings on the component board (TP5,TP6,TP7 and TP8). If you cannot find any faults, send the transmitter to Vaisala for repair. E42 f (T2) out of range - the temperature measurement cannot be completed. Check the temperature sensor and its solderings.
  • Page 133 Check the temperature measurement wires and their solderings on the component board (TP5,TP6,TP7 and TP8). If you cannot find any faults, send the transmitter to Vaisala for repair. E45 f (Ud1 ) out of range - the humidity measurement cannot be completed. Check the HUMICAP sensor and humidity measurement wires and their solderings on the component board (TP9,TP10 and TP11/15).
  • Page 134 Check the temperature measurement wires and their solderings on the component board (TP5,TP6,TP7 and TP8). If you cannot find any faults, send the transmitter to Vaisala for repair. E53 U1 y-value out of range - the humidity measurement cannot be completed. Check the HUMICAP sensor and humidity measurement wires and their solderings on the component board (TP9,TP10 and TP11/15).

  • Page 135: Appendix 6 Calculation Formulas

    HMP230 SERIES U116en-2.2 Appendix 6: Calculation formulas CALCULATION FORMULAS The HMP230 series transmitters measure relative humidity and temperature. From these values dewpoint, mixing ratio, absolute humidity and enthalpy in normal pressure are calculated using the following equations dewpoint: mixing ratio:...
  • Page 136 HMP230 SERIES Appendix 6: Calculation formulas U116en-2.2 The vapour pressure (in Pascals) is calculated using equation: where: = coefficients b -1 = -0.58002206 * 10 4 = 0.13914993 * 10 1 = -0.48640239 * 10 -1 = 0.41764768 * 10 -4 = -0.14452093 * 10 -7...

  • Page 137: Alarm Output Unit

    HMP230 SERIES U116en-2.2 Appendix 7: Alarm output unit ALARM OUTPUT UNIT The alarm output unit consists of two alarm relays and two opto-isolated outputs (see Figure 1). The relay output 1 is available at screw terminal X1 and the relay output 2 at screw terminal X2. The opto-outputs are activated...
  • Page 138 HMP230 SERIES Appendix 7: Alarm output unit U116en-2.2 M3 screws (4 pcs) for mounting ribbon cable (prefix with fibre washers) M4 screw and washer for protective ground terminal replace the plastic plug with cable gland for ¢7...12 mm cable probe cable gland cable: strip wires only 5 mm;...

  • Page 139: Appendix 7 Alarm Output Unit

    HMP230 SERIES U116en-2.2 Appendix 7: Alarm output unit Setting and activating the outputs with menu commands Select MORE in the main menu and then ALARM; the following is displayed: If the settings need to be changed, press CL: - the quantity starts blinking; it can be changed with arrow switches, and acknowledged with ENT.
  • Page 140 HMP230 SERIES Appendix 7: Alarm output unit U116en-2.2 The currently valid settings of the alarm output unit can be checked with command ALARM: >alarm<cr> Ch1 RH 0.00 0.00 %RH Ch2 RH OFF 100.00 0.00 %RH > This is an example of the factory setting (both alarm outputs are in OFF mode, i.e.
  • Page 141 HMP230 SERIES U116en-2.2 Appendix 7: Alarm output unit with commands ALARM 1 ON and ALARM 2 ON: >alarm Ch1 Td -20.00 5.00 ’C Ch2 T 30.00 5.00 ’C >alarm Ch1 Td -20.00 5.00 ’C Ch2 T 30.00 5.00 ’C >...
  • Page 142 HMP230 SERIES U116en-2.2 Appendix 8: Connectors CONNECTORS Connector options....................140 Analogue outputs ....................140 Serial connections....................141 Instructions for connecting and mounting the counter pieces......142...
  • Page 143 Appendix 8: Connectors U116en-2.2 1.1 Connector options The HMP230 series transmitters can be ordered with various connector configurations meaning that the sleeve or plug of the standard transmitter has been replaced with a connector. In the following, various options and signals.
  • Page 144 HMP230 SERIES U116en-2.2 Appendix 8: Connectors Serial connections Also an RS232C serial bus can be connected to the connector; in this case, the connector is used mainly for maintenance and calibration purposes. Alternatively, a two wire RS 485 net can be built through the connector; in this case, also the power supply (24 VDC) is chained through transmitters.

  • Page 145: Appendix 8 Connectors

    HMP230 SERIES Appendix 8: Connectors U116en-2.2 Instructions for connecting and mounting the counter pieces The counter piece has to be grounded as shown in Figure 1.4 in order to maintain a complete EMC protection. The recommended cable is a shielded cable with an outer diameter of 4 - 6 mm, e.g.
  • Page 146 HMP230 SERIES U116en-2.2 Appendix 9: Re-gaining RE-GAINING GENERAL .......................144 TO BE NOTED IN RE-GAINING ................145 LED COMMANDS ....................146 DISPLAY/KEYPAD COMMANDS ................147 4.1. Re-gaining parameters ................147 4.2. Starting re-gaining manually ..............148 SERIAL COMMANDS....................149 Re-gaining settings...............149 Re-gaining parameters ..............149 Changing re-gaining parameters...........150 Displaying re-gaining status............150...

  • Page 147: Re-Gaining

    PPS grid with stainless steel netting (part no. 16720HM) or with a stainless steel sintered filter (part no. 16452). The power supply module (optional for the HMP230 series) cannot be used when the transmitter includes the re-gaining option.

  • Page 148: To Be Noted In Re-Gaining

    HMP230 SERIES U116en-2.2 Appendix 9: Re-gaining TO BE NOTED IN RE-GAINING Re-gaining cannot be started automatically or manually unless the security lock jumper is on. This is to prevent automatic re-gaining from starting during a sensor calibration (when the security lock jumper must be removed).

  • Page 149: Re-Gaining

    HMP230 SERIES Appendix 9: Re-gaining U116en-2.2 suitable in an ambient with a gas flow rate of 2 m/s or more around the sensor head. Furthermore, if the settling time is very long and the temperature difference small (close to zero) and the ambient temperature changes during re-gaining, the sensor may not reach the temperature difference within the settling time and the transmitter will remain inactive for a long period of time.

  • Page 150: Display/Keypad Commands

    HMP230 SERIES U116en-2.2 Appendix 9: Re-gaining DISPLAY/KEYPAD COMMANDS Press the CL key to enter the command mode. Select from the first menu using the arrow keys and press ENT key. Select again from the second menu and press ENT. The following menu is displayed: Select and press ENT.

  • Page 151: Starting Re-Gaining Manually

    HMP230 SERIES Appendix 9: Re-gaining U116en-2.2 Use arrow keys to change the status of the automatic re-gaining and press ENT. Acknowledge the current setting by pressing ENT. To change the interval press CL. Using arrow keys select the new time interval digit by digit and acknowledge each digit using ENT key.

  • Page 152: Serial Commands

    HMP230 SERIES U116en-2.2 Appendix 9: Re-gaining SERIAL COMMANDS Re-gaining settings REG <cr> REG nnn <cr> nnn = ON or OFF Command REG is used to check the re-gaining parameter settings and to activate or inactivate the automatic re-gaining. Examples: checking the current settings >reg...

  • Page 153: Cri Changing Re-Gaining Parameters

    HMP230 SERIES Appendix 9: Re-gaining U116en-2.2 Changing re-gaining parameters Disconnect the security lock jumper! CRI <cr> With command CRI the values of the re-gaining parameters can be changed. Example: changing the re-gaining interval to 480 min and the settling time after sensor heating to 360 s >cri...

  • Page 154: Regen Starting Re-Gaining Manually

    HMP230 SERIES U116en-2.2 Appendix 9: Re-gaining Example: activating status display >fst on Form. status >r N = re-gaining off 0 RH= 20.8 %RH T= 25.6 ’C 0 RH= 20.7 %RH T= 25.6 ’C 0 RH= 20.7 %RH T= 25.6 ’C 0 RH= 20.8 %RH T= 25.6 ’C...
  • Page 155 HMP230 SERIES Appendix 9: Re-gaining U116en-2.2 Example: >regen Regeneration started, press any key to abort >r heating is finished, 162 RH= 20.0 %RH T= 26.5 ’C settling time is on and 162 RH= 20.0 %RH T= 26.5 ’C outputs are locked 162 RH= 20.0 %RH T= 26.5 ’C...

  • Page 156: Technical Data

    HMP230 SERIES U116en-2.2 Appendix 9: Re-gaining TECHNICAL DATA Power consumption during re-gaining (without alarm output unit) 170 mA maximum (24 VDC) NOTE The optional power supply module cannot be used in a a transmitter which includes the re-gaining option. Sensor RH &...
  • Page 157 HMP230 SERIES U116en-2.2 Appendix 10: Pressure unit conversion chart PRESSURE UNIT CONVERSION CHART Multiplication factors NOTE: conversions from mmHg and inHg are defined at 0°C and for mmH and inH O at 4°C. FROM: hPa/mbar 0.01 PaN/m 1.333224 mmHg torr 33.86388...

  • Page 158: Appendix 11

    APPENDIX 11 Reason/ECO no Design Date Review Date Appr Change Note ! The cable shield has to be connected to the cable bushing for full EMC protection. Main board HMP230 Main board HMP230 In automation system In automation system the galvanically isolated inputs Channel1+ Humidity and Humidity and...
  • Page 161 HMP230 series & HMP260 series 1 (4) Humidity and temperature transmitters Sensor Systems Division Quick Installation & Reference Guide U090en-2.1 This guide gives basic installation instructions and the most common serial commands needed in the use of the HMP230 and HMP260 transmitters. This guide does not, however, replace the operating manual. For detailed instructions and descriptions of serial commands always refer to the operating manual.

  • Page 162: Wiring Diagram

    HMP230 series & HMP260 series 2 (4) Humidity and temperature transmitters Sensor Systems Division Quick Installation & Reference Guide U090en-2.1 WIRING DIAGRAM Note ! The cable shield has to be connected to the cable bushing for full EMC protection. Main board HMP230 and HMP260...
  • Page 163 HMP230 series & HMP260 series 3 (4) Humidity and temperature transmitters Sensor Systems Division Quick Installation & Reference Guide U090en-2.1 SERIAL COMMANDS (program version 3.01 or later) AMODE Setting the analogue outputs Relative humidity calibration Disconnect the security lock jumper!
  • Page 164 HMP230 series & HMP260 series 4 (4) Humidity and temperature transmitters Sensor Systems Division Quick Installation & Reference Guide U090en-2.1 FORM Setting the output format ADDR Setting the transmitter address FORM <cr> ADDR aa <cr> "xxx...xxx" ? zzz...zzz <cr> = address (0...99) xxx...xxx...

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