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Summary of Contents for Vaisala HMP228
- Page 1 HMP228 Moisture and Temperature Transmitter for Oil UIDE M210282en-A May 2002...
- Page 2 Finland Visit our Internet pages at http://www.vaisala.com/ © Vaisala 2002 No part of this manual 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 holder.
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Page 3: Table Of Contents
HMP228 M210282en-A Operating Manual Contents PRODUCT DESCRIPTION ....................1 General characteristics................... 1 Typical applications ....................1 1.2.1 About the method used for measuring moisture in oil ........ 1 1.2.2 Lubrication oil in paper machines .............. 2 1.2.3 Transformer oil ..................2 INSTALLATION ........................ - Page 4 HMP228 Operating Manual M210282en-A 4.6.1.2 Using display/keypad commands .............. 28 4.6.1.3 Using LED commands ................28 4.6.2 Two point temperature calibration............. 28 4.6.2.1 Using serial commands ................28 4.6.2.2 Using display/keypad commands .............. 29 4.6.2.3 Using LED commands ................29 4.6.3...
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Page 7: Product Description
The operation of the sensor is based on changes in its capacitance as the thin polymer film absorbs water molecules. The HMP228 transmitter has two analogue outputs and 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: Lubrication Oil In Paper Machines
While temperature raises, the paper insulation of transformers tends to loose moisture which is absorbed by the oil surrounding it. Saturation level is thus a true indicator of moisture present. The HMP228 method provides for a reliable detection of the aging of oil and possible leakages. -
Page 9: Installation
HMP228 M210282en-A Operating Manual INSTALLATION Selecting the place of installation for the probe and the transmitter Select a place which gives a true picture of the process. Oil should circulate freely around the sensor; a rapid oil flow is recommended. Install the sensor directly into the circulation system and not into the oil reservoir because of deposition. -
Page 10: Mounting
HMP228 Operating Manual M210282en-A Mounting In Figures 2.2.1 and 2.2.2 you can see the dimensions of the HMP228 transmitter and probe: ø6.5 Figure 2.2.1 Dimensions of the HMP228 electronics housing (in mm) Probe pushed down Probe up Parallel thread Tapered thread Ø13.5... - Page 11 HMP228 M210282en-A Operating Manual fitting body parallel thread hex = 24mm G1/2 ISO 228/1 tapered thread (BS 2779, JIS B0202) R1/2 ISO 7/1 ø19mm drilling >10.5mm >40m m Process or pipe wall sealing with: 1. LOCTITE® No 542 + activ. No 7649 (t=-55...+150 °C) 2.
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Page 12: Installing The Probe Through The Ball Valve Assembly
HMP228 Operating Manual M210282en-A 2.2.3 Installing the probe through the ball valve assembly It is recommended that the sensor head is installed in the process through the ball valve assembly. Use a 1/2" ball valve assembly with a hole diameter of 14 mm or more. - Page 13 HMP228 Operating Manual See Figures 2.2.3.2 - 2.2.3.4 for detailed description of installation through the ball valve assembly. 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 14 HMP228 Operating Manual STEP 2: open the ball valve assembly ø5.5 wedge ring (AV=27mm) screw A ø14 O-ring (40) moisture sensor sintered ø12 filter > ø14 R1/2 ISO 7/1 process pipe or chamber Figure 2.2.3.3 Installing the probe through the ball valve assembly;...
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Page 15: Mounting The Probe Directly In The Process Pipe
HMP228 M210282en-A Operating Manual STEP 3: push the probe head through the ball valve assembly into the process. Note that the sensor head must be pushed so deep that the filter is completely inside the process flow. MANUAL PRESS TOOL... -
Page 16: Signal Cabling And Grounding
HMP228 Operating Manual M210282en-A when the probe is pulled capped nut out for maintenance, cap DIN 917-M22x1.5 the hole with a capped nut; this way, the process can be open although the probe is not in place sealing probe welded sleeve... -
Page 17: Connection To An Ac Supply
2.3.2 Connection to an AC supply The HMP228 transmitter can also be connected to an AC supply without an external rectifier. However, when more than one transmitter is connected for example to one 24 VAC transformer, a common loop is formed and there is an increased risk of a short-circuit. -
Page 18: Grounding
HMP228 Operating Manual M210282en-A 2.3.3 Grounding A single electrical cable with a screen and three to ten wires is recommended for power and analogue output/serial bus connections. The cable diameter should be 7...10 mm. The screen of the electrical cable must be grounded properly to achieve best possible EMC performance. - Page 19 HMP228 M210282en-A Operating Manual connect the wires into the screw terminals and fasten a cable tie around the wires Use connectors instead of traditional cabling. See Appendix 8 for connector types available and for detailed instructions. cable tie transmitter housing...
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Page 20: Commissioning
A limited range of commands can be given with the three press switches (up, down, enter) inside the transmitter housing. There are four LEDs to indicate the commands given with the up and down switches. All HMP228 units incorporate these switches and LED indicators. LED commands can be used to calibrate the transmitters (both humidity and temperature) or to calibrate the analogue outputs. -
Page 21: Commands And Security Lock Jumper
When the security lock jumper is connected, some commands cannot be used, see Chapter 4. If you wish to take into use variables that are not included in the configuration of your transmitter, contact Vaisala for more information. 3.1.2 Commands and security lock jumper... -
Page 22: Using The Rs 232C Serial Bus
Sensor connections Figure 3.2.1 Serial bus connections To connect a PC to the HMP228 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 23 7 data bits, 1 stop bit: if this combination is given the HMP228 programme will change the number of stop bits to 2 even or odd parity, 8 data bits, 2 stop bits: if this combination is given...
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Page 24: Using Led Commands
HMP228 Operating Manual M210282en-A Using 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 25: Command Mode
HMP228 M210282en-A Operating Manual with button s and the second line with button t; all selections are stored with ENTER. The selected quantities appear on the display also after power failure. After reset the transmitters are always in the display mode. -
Page 26: Maintenance
If they are intact, send the transmitter to Vaisala for repairs. The error messages are listed in Appendix 3. If any errors occur during operation, the error messages are output on the local display if the transmitter displays measurements;... -
Page 27: Moisture Calibration
A two-point calibration can be performed with Vaisala’s HMK15 or HMK13B Calibrator or the instrument can be sent to Vaisala. The instrument has to be recalibrated each time the moisture sensor is changed. A Ø 13.5 adapter must be used when calibrating with the HMK13B Calibrator. -
Page 28: Two Point Calibration Procedure
HMP228 Operating Manual M210282en-A 4.3.1 Two point calibration procedure A two point calibration should be performed in stable conditions using saturated salt solutions as references. Disconnect the security lock jumper! 4.3.1.1 Using 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. -
Page 29: Using Led Commands
HMP228 M210282en-A Operating Manual 4.3.1.3 Using 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. Remove the filter cap on the transmitter. Connect an ammeter/voltmeter to the analogue outputs (connector X2). -
Page 30: Using Display/Keypad Commands
HMP228 Operating Manual M210282en-A Press any key and press <cr> when the transmitter requests the second point value. 75.5 Ref2 ? yy.y <cr> 4.3.2.2 Using display/keypad commands Make sure that the sensors of the transmitter and the reference instrument are close to each other. Allow enough time for the sensors to stabilize to the measurement conditions. -
Page 31: Calibration Procedure After Sensor Change
HMP228 M210282en-A Operating Manual 4.4.1 Calibration procedure after sensor change Humidity calibration should be performed in stable conditions using saturated salt solutions as a reference. Disconnect the security lock jumper! 4.4.1.1 Using 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. -
Page 32: Using Led Commands
HMP228 Operating Manual M210282en-A Select Cali in the main menu and then RH cal; select Sensor changed. Change the first point reading with the arrow keys and press ENT. Insert the sensor head into the calibration hole of the NaCl chamber of the humidity calibrator. -
Page 33: Humidity Calibration Table
HMP228 M210282en-A Operating Manual 4.4.5 Humidity 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 0.565 0.565 0.565 0.565 0...10 V... -
Page 34: Using Display/Keypad Commands
HMP228 Operating Manual M210282en-A T : 0.90 Ref1 ? c <cr> T : 0.55 Ref1 ? c <cr> T : 0.55 Ref1 ? 0.0 <cr> Press any key when ready... After giving the correct temperature value (Ref1) and pressing <cr>... -
Page 35: Using Display/Keypad Commands
HMP228 M210282en-A 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> T : 0.55 Ref1 ? 0.0 <cr>... -
Page 36: Temperature Channel Adjustment With Pt 100 Simulators
HMP228 Operating Manual M210282en-A Check that the reading corresponds with the reading of the reference instrument. If not, adjust the second point. If necessary, adjust with the arrow switches to the correct value and press ENT. At the second calibration point the second LED from the left flashes. -
Page 37: Analogue Output Channels
4.7.1 Setting the analogue outputs The HMP228 transmitters can be ordered with the required current or voltage outputs already selected. If the outputs need to be changed, move the jumpers in connector X15 into positions as shown in Figure 4.7.1.2. -
Page 38: Using Serial Output
HMP228 Operating Manual M210282en-A Ch1Ch2 Current outputs 0... 20/4... 20 mA Ch1Ch2 Voltage outputs 0... 5/0... 10 V Ch1 Ch2 Ch1Ch2 Voltage outputs Current loop or RS485 module 0... 1 V Ch1Ch2 Ch1 0... 1 voltage ouput Sensor connections Ch 2 current output Figure 4.7.1.2 Selecting the analogue outputs with jumpers... -
Page 39: Using Display/Keypad Commands
HMP228 M210282en-A Operating Manual 4.7.1.2 Using display/keypad commands Disconnect the security lock jumper! Select Mode in the main menu and Analog outputs in the Mode menu: Select Mode (ma/V). The current settings for channel 1 are displayed: If the settings are correct, press ENT. -
Page 40: Selecting And Scaling The Analogue Output Quantities
HMP228 Operating Manual M210282en-A 4.7.2 Selecting and scaling the analogue output quantities Disconnect the security lock jumper! 4.7.2.1 Using serial output ASEL xxx yyy <cr> channel 1's quantity channel 2's quantity (Aw, T) Example: water activity is selected on channel 1 and temperature on channel 2 >ASEL aw T <cr>... -
Page 41: Checking And Calibrating The Analogue Outputs
HMP228 M210282en-A Operating Manual If the settings need to be changed, press CL: the quantity (aw, T) starts flashing; it can be changed with the arrow keys and acknowledged with the ENT key the lower limit starts flashing acknowledge the lower limit with ENT or start changing it by pressing CL;... -
Page 42: Calibration Of The Analogue Outputs
HMP228 Operating Manual M210282en-A Ch1 Ch2 Current loop or RS485 module Sensor connections Figure 4.8.1.1 Location of the CH1 and CH2 test points CH1+ CH1+ CH1- TEST POINTS CH1- Figure 4.8.1.2 Circuit diagram of the analogue output current test points. -
Page 43: Using Serial Commands
HMP228 M210282en-A Operating Manual 4.8.1.1 Using serial commands ACAL <cr> The outputs on channels 1 and 2 are measured and the measured values (mA or V) entered as calibration coefficients. Example: both channels have 0...10 V outputs (set with AMODE command);... -
Page 44: Using Led Commands
HMP228 Operating Manual M210282en-A 4.8.1.3 Using LED commands If both the analogue outputs and humidity/temperature channels are calibrated, the analogue outputs should be calibrated first. This applies only when the calibrations are made using the LED commands! connect an ammeter/voltmeter to the analogue outputs (connector X2) Give command ¡¡ll. - Page 45 HMP228 M210282en-A Operating Manual Ch1 Ch2 Current loop or RS485 module Sensor connections Figure 4.9.2 Forcing the serial port settings back to factory settings 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.
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Page 46: Technical Data
HMP228 Operating Manual M210282en-A TECHNICAL DATA Water activity Measuring range of water activity 0...1 Accuracy (including nonlinearity and repeatability) maximum achievable accuracy when calibrated against high quality, when calibrated against salt solutions (ASTM E104-85): ±0.02 (0...0.9) ±0.03 (0.9...1.0) maximum achievable accuracy when calibrated... -
Page 47: Electronics
-40...+45 °C with alarm outputs up to 8A -40...+45 °C with alarm outputs up to 6A -40...+60 °C Storage temperature -40...+70 °C Pressure range of the HMP228 0...40 bar sensor head Mechanics Housing material G-AlSi12 (DIN 1725) Housing classification IP 65 (NEMA 4) - Page 48 HMP228 Operating Manual M210282en-A Bushing for 7...10 mm diameter cable (8 x 0.5 mm shielded cable) Sensor protection Stainless steel filter (part no. HM46999) Housing dimensions 145 x 120 x 65 mm Sensor head dimensions (see Figure) length 170 mm, Ø 13.5 mm:...
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Page 49: Electromagnetic Compatibility
HMP228 M210282en-A Operating Manual Electromagnetic compatibility The emission and immunity tests have been performed according to thestandard EN61326-1:1997+Am1:1998; Industrial environment. 5.7.1 Emissions Test: Setup according to: Radiated emissions EN 55022/CISPR 22 (class B) With power supply unit (HMP230PW): Conducted emissions... -
Page 50: Options
HMP228 Operating Manual M210282en-A OPTIONS Power supply module Operating voltage 115 VAC (93...127 V) 230 VAC (187...253 V) Serial interface RS485/422 module HMP230RS current loop module HMP230CL Cable length 2, 5 or 10 metres Display cover cover with or without local display &... -
Page 51: Appendix 1: Serial Commands
HMP228 Transmitters M210282en-A Appendix 1: Serial commands APPENDIX 1: SERIAL COMMANDS 1. ANALOGUE OUTPUT COMMANDS ..................46 AMODE Setting the analogue outputs ..............46 ASEL Selecting the scaling the analogue output quantities........46 ASCL Scaling the analogue outputs ................ 47 2. -
Page 52: Analogue Output Commands
HMP228 Transmitters Appendix 1: Serial commands M210282en-A 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 53: Ascl Scaling The Analogue Outputs
HMP228 Transmitters M210282en-A Appendix 1: Serial commands For example, water activity is selected to be output on channel 1 and tem- perature on channel 2; the temperature range is scaled to 0...100 C: >ASEL RH T <cr> Ch1 (aw) lo 0.000... - Page 54 HMP228 Transmitters Appendix 1: Serial commands M210282en-A 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 55: Calibration Commands
HMP228 Transmitters M210282en-A 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 56: Ct Temperature Calibration
HMP228 Transmitters Appendix 1: Serial commands M210282en-A 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 57: Acal Calibrating The Analogue Outputs
HMP228 Transmitters M210282en-A 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 58: Output Via The Serial Bus
HMP228 Transmitters Appendix 1: Serial commands M210282en-A 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 59: Send Outputting A Reading Once
HMP228 Transmitters M210282en-A 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 60: Echo Turning The Serial Interface Echo On/Off
HMP228 Transmitters Appendix 1: Serial commands M210282en-A If errors have occurred, the transmitter outputs the error code (see Appendix 5 for error messages): >ERRS <cr> ( all ) out of range > ECHO Turning the serial interface echo ON/OFF ECHO xxx <cr>... -
Page 61: Form Setting The Output Format
HMP228 Transmitters M210282en-A 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 62: Ftime Adding Time To Output
HMP228 Transmitters Appendix 1: Serial commands M210282en-A 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. The time is set with command TIME. After RESET or power on the current time is 00:00:00. -
Page 63: Seri Serial Bus Settings
7 data bits, 1 stop bit: if this combination is given the HMP228 programme will change the number of stop bits to 2 even or odd parity, 8 data bits, 2 stop bits: if this combination is given... -
Page 64: Unit Selecting The Output Units
HMP228 Transmitters Appendix 1: Serial commands M210282en-A NOTE The serial bus settings become effective only after reset. When the half-duplex mode is set, it will automatically turn the echo off. Even then the ECHO command can indicate that echo is on. -
Page 65: Reset Resetting The Transmitter
HMP228 Transmitters M210282en-A Appendix 1: Serial commands When asking the current address, no address number is given: >ADDR <cr> Address : 2 ? <cr> RESET Resetting the transmitter RESET <cr> Resets the transmitter. All settings that have been changed stay in the memory even after reset or power failure. -
Page 66: Open & Close
HMP228 Transmitters Appendix 1: Serial commands M210282en-A 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 POLL mode In POLL mode: command OPEN sets the transmitter temporarily in STOP... -
Page 67: Others
HMP228 Transmitters M210282en-A 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 68: Mtim Setting The Measurement Integration Time
HMP228 Transmitters Appendix 1: Serial commands M210282en-A MTIM Setting the measurement integration time MTIM nnn <cr> number of cycles measured (4...255) By lengthening the measurement integration time any stray changes in the out- put can be filtered out: the transmitter calculates the average of a number of measurement cycles defined by the user. -
Page 69: Xpres Setting The Pressure For Mixing Ratio Calculations Temporarily
HMP228 Transmitters M210282en-A Appendix 1: Serial commands XPRES Setting the pressure for mixing ratio calculations tempo- rarily XPRES pppp.pp <cr> pppp.pp = pressure (hPa) The function and format of XPRES are the same as those of the PRES com- mand except that with XPRES command the setting is valid only until a reset is given, power is turned off or pressure is set to zero with XPRES. -
Page 70: Time Setting The Time
HMP228 Transmitters Appendix 1: Serial commands M210282en-A 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 71: Filt Setting The Averaging Time
HMP228 Transmitters M210282en-A Appendix 1: Serial commands 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 72: Appendix 2: Display Commands
HMP228 Appendix 2: Display commands M210282en-A APPENDIX 2: DISPLAY COMMANDS 1. DISPLAY COMMANDS ......................67 1.1 Display/keypad commands ..................67 1.1.1 Output via the serial bus ................67 1.1.1.1 Turning the serial interface echo ON/OFF ............ 67 1.1.1.2 Serial bus settings ..................67 1.1.1.3 Setting the transmitter address .............. -
Page 73: Display Commands
Appendix 2: Display commands DISPLAY COMMANDS The HMP228 transmitter uses a microprocessor; therefore its configuration can be set according to the user's needs. This is done through commands. Most often the commands are used to change the settings of the two analogue channels. -
Page 74: Setting The Transmitter Address
7 data bits, 1 stop bit: if this combination is given the HMP228 programme will change the number of stop bits to 2 even or odd parity, 8 data bits, 2 stop bits: if this combination is given... -
Page 75: Selecting The Output Units
The output modes only affect output through the serial interface: the transmit- ter accepts all display and LED commands irrespective of which serial output mode it is in. The HMP228 transmitter has three serial output modes: RUN, STOP and POLL. -
Page 76: Setting The Serial Interface Operation Mode
HMP228 Appendix 2: Display commands M210282en-A 1.1.2.1 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 77: Others
HMP228 M210282en-A Appendix 2: Display commands 1.1.3 Others 1.1.3.1 Setting the measurement integration time By lengthening the measurement integration time any stray changes in the output can be filtered out: the transmitter calculates the average of a number of measurement cycles defined by the user. -
Page 78: Setting The Date
HMP228 Appendix 2: Display commands M210282en-A 1.1.3.3 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 79: Appendix 3: Power Supply Module
HMP228 M210282en-A Appendix 3: Power supply module APPENDIX 3: POWER SUPPLY MODULE 1. INSTALLING THE POWER SUPPLY MODULE ..............74 2. TECHNICAL SPECIFICATIONS..................... 76... -
Page 80: Installing The Power Supply Module
HMP228 Appendix 3: Power supply module M210282en-A 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 81 HMP228 M210282en-A Appendix 3: 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. The power supply module cannot be used if the re-gaining option has NOTE been activated.
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Page 82: Technical Specifications
HMP228 Appendix 3: Power supply module M210282en-A TECHNICAL SPECIFICATIONS Operating voltage 115 VAC (93...127 V) 230 VAC (187...253 V) Connections input screw terminals 1.5 mm wire (AWG 16) output screw terminals 2.5 mm wire (AWG 20) Bushing for 7...12 mm diameter cable... -
Page 83: Appendix 4: Installing And Using The Rs 485/422 Serial Port Module
HMP228 M210282en-A Appendix 4: RS 485/422 serial port module APPENDIX 4: INSTALLING AND USING THE RS 485/422 SERIAL PORT MODULE 1. INSTALLATION ........................78 2. OPERATION .......................... 79 3. NETWORK CONFIGURATION ....................81 Single loop operation ....................... 81 Dual loop operation ......................83 4. -
Page 84: Installation
The module is plugged in connectors X4 and X5 on the main board of the HMP228 transmitter; connector X1 on the module board to connector X4 and connector X2 to connector X5. -
Page 85: Operation
The HMP228 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 HMP228 transmitter is used; when several transmitters are connected to the same line, each transmitter must be given an address in the initial configuration. - Page 86 HMP228 Appendix 4: RS 485/422 serial port module M210282en-A 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.
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Page 87: Network Configuration
HMP228 M210282en-A Appendix 4: 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 88 HMP228 Appendix 4: RS 485/422 serial port module M210282en-A 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.
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Page 89: Dual Loop Operation
HMP228 M210282en-A Appendix 4: 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 90 HMP228 Appendix 4: RS 485/422 serial port module M210282en-A 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.
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Page 91: Checking The Serial Port Network Operation
Do not open more than one line at a time. Use command ? to find out the settings of the active transmitter: ? <cr> HMP228 / 1.01 CPU serial nr : Keyboard type :... -
Page 92: Poll Mode
Terminal settings single pair dual pair Line feed after carriage return HDX/FDX When terminal is set to general <lf> (line feed) after <cr> (carriage return), the listings will have two line feeds when also the HMP228 transmitters send line feed. -
Page 93: Specifications
1000 m (3000 ft) number of devices 32 devices on line data speed 9600 baud max. for HMP228 transmitters operating mode polling mode common mode voltage range ±7 V Operating temperature -40...+60 °C Storage temperature -40...+70 °C... -
Page 94: Appendix 5: Installing And Using The Digital Current Loop Module
HMP228 Appendix 5: Digital current loop module M210282en-A APPENDIX 5: INSTALLING AND USING THE DIGITAL CURRENT LOOP MODULE 1. INSTALLATION ........................89 2. OPERATION .......................... 90 3. NETWORK CONFIGURATION ....................92 Single loop operation ....................... 92 Single loop wiring ......................92 Dual loop operation ...................... -
Page 95: Installation
The module is plugged in connectors X4 and X5 on the main board of the HMP228 transmitter; connector X1 on the module board to connector X4 and connector X2 to connector X5. -
Page 96: Operation
The serial line structure is a serial interfaced chain (daisy chain). At one end of the serial line there must be a HMP228 transmitter and at the other end a line master. A branch line can be made with a junction box. - Page 97 A single loop connection has simpler wiring. Data transmis- sion is achieved by switching the loop current on and off. Normally, current flows through the loop(s) even when the HMP228 transmit- ter is not on, so switching one transmitter off does not affect the other trans- mitters on the loop.
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Page 98: Network Configuration
HMP228 Appendix 5: Digital current loop module M210282en-A 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). Supplying power from the same end to the loops prevents crossover voltages. -
Page 99: Dual Loop Operation
HMP228 M210282en-A Appendix 5: Digital current loop module 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 100: Dual Loop Wiring
HMP228 Appendix 5: Digital current loop module M210282en-A 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 101: Checking The Serial Port Network Operation
CLOSE command is given. Individual settings can now be easily modified. Do not open more than one line at a time. Use command ? to find out the settings of the active transmitter: ? <cr> HMP228 /1.01 CPU serial nr : Keyboard type : Address... -
Page 102: Poll Mode
Terminal settings single pair dual pair Line feed after carriage return HDX/FDX When terminal is set to general <lf> (line feed) after <cr> (carriage return), the listings will have two line feeds when also the HMP228 transmitters send line feed. -
Page 103: Specifications
HMP228 M210282en-A Appendix 5: Digital current loop module 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 104: Appendix 6: Error Messages
M210282en-A APPENDIX 6: ERROR MESSAGES The HMP228 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 105 HMP228 M210282en-A Appendix 6: Error messages Errors during operation Two types of errors are possible during 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 106 HMP228 Appendix 6: Error messages M210282en-A The LEDs display these error types 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 calcula-...
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Page 107: Alarm Output Unit
HMP228 M210282en-A 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 108 HMP228 Appendix 7: Alarm output unit M210282en-A 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 109 HMP228 M210282en-A Appendix 7: Alarm output unit - the third parameter (in this example HI ON) starts blinking. This parameter determines whether the alarm output is in use or not, and when it is activated. The selection is acknowledged with ENT.
- Page 110 HMP228 Appendix 7: Alarm output unit M210282en-A When giving this command, first enter the channel number i.e. the number of the alarm output you wish to use (1 or 2). Then select the quantity you wish to have on that channel (aw or T). The third parameter (HI/LO) determines whether the alarm is activated when the setpoint value is exceeded (HI) or not reached (LO).
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Page 111: Appendix 8: Connectors
HMP228 M210282en-A Appendix 8: Connectors APPENDIX 8: CONNECTORS 1.1 Connector options ....................106 1.2 Analogue outputs ..................... 106 1.3 Serial connections ....................107 1.4 Instructions for connecting and mounting the counter pieces......108... - Page 112 Appendix 8: Connectors M210282en-A 1.1 Connector options The HMP228 moisture transmitter 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.
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Page 113: Appendix 9: Wiring
HMP228 M210282en-A 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 114 HMP228 Appendix 8:Connectors M210282en-A 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. PFSK 6 x 0.22 mm.
- Page 115 APPENDIX 9...
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