Honeywell RDD100 User's Manual
Contents
1. RDD100 as it provides better resolution and accuracy Any of 16 different pressure display units may be selected for use with the RDD100 A list of available pressure units is shown in section 2 4 below A more complete description of the Honeywell transducers can be found in their respective user manuals See http www pressuresensing com EQUIPMENT SET UP Cables amp Connections Figure 1 shows connections that must be made between the RDD100 and Honeywell RS 232 pressure transducer A six foot long cable for this connection is supplied with the RDD100 Figure 1 also shows connections to the 12V DC input power To obtain transducer pressure readings only these two connections are needed Figure 1 also shows a connection to a personal computer This connection may be used for data logging or to communicate with the transducer in order to set up and change various parameters display units integration time idle count etc A six or ten foot long computer to RDD100 cable can be selected when the RDD100 is ordered Personal Computer Set Up The RS 232 transducer must be configured to send continuous readings to the RDD100 in order for pressure readings to appear The display will remain blank and the error LED will be lit continuously when the RDD100 fails to receive continuous input from a transducer Transducers ordered with the RDD100 will be configured at the factory to function properly with the RDD100 A transducer that has not been conf2. transducer factory defaults have not been changed Resp 99DU Command Echo To change the display units Type 99we lt cr gt www honeywell com RDD100 User Guide Honeywell Resp 99WE Command Echo Type 99du selection see DU list below A list of available pressure display units can also be found in the associated transducer User s Manual Resp 99DU selected display units Command Echo Display Units List Display Unit PSI Multiplier Units Description ATM 0 068046 ambient atmosphere at sea level BAR 0 068948 bar 10 newtons meter CMWC 70 304 centimeters of water column 4 C FTWC 2 3065 feet of water column 4 C INHG 2 0360 inches of mercury 0 C INWC 27 679 inches of water column 4 C KGCM 0 070307 kilograms centimeters KPA 6 8948 kilopascal MBAR 68 948 millibar 1 hectopascal MMHG 51 714 millimeters of mercury 0 C or torr MPA 0 0068948 megapascal MWC 0 70304 meters of water column 4 C PSI 1 0000 pounds per square inch USER 0 0010000 999 99 user supplied LCOM FS 60000 logic common value PFS FS 100 000 percent of full scale in 0 001 Increments The LCOM display unit logic common automatically switches the digital pressure output to a scale which has 60000 as the full scale output The output will have a decimal point in the same position as it was in the original psi scale For example when a 10 psia device is switched to DU LCOM the full scale digital pressure outp
3. Honeywell Pressure Sensor Products RDD100 Remote Digital Honeywell Display User Manual RDD100 User Guide Table of Contents 1 Introduction 1 1 Product Overview 1 2 Transducer Description 2 Equipment Set Up 2 1 Cables amp Connections 2 2 Personal Computer Set Up 2 3 Set Transducer Baud Rate 2 4 Setting Transducer Display Units 2 5 Continuous Transmit Mode 2 6 Changes Stored In EEPROM 2 7 Verifying Stored Parameters 3 Operation 3 1 Start Up Messages 3 2 Error Indications 3 2 1 Transducer Not Connected 3 2 2 Incorrect Baud Rate 3 2 3 Not Set Up To Continuously Transmit 3 2 4 Wrong Polarity Of DC Power 3 2 5 Transducer Disconnected While Transmitting 3 2 6 Over Under Ranged Transducer Indications 4 Power Requirements 4 1 Voltage 4 2 Current 4 3 Power Connection 5 Operating Environment 5 1 Operating Temp Range 5 2 Storage Temp Range 5 3 Relative Humidity 6 Dimensions 6 1 Overall 6 2 Panel Cutout Dimensions 6 3 Depth Behind Panel Honeywell www honeywell com RDD100 User Guide Honeywell 1 1 1 2 2 1 2 2 INTRODUCTION Product Overview The Honeywell Remote Digital Display RDD100 produces a digital display of measured pressures and is designed for use with RS 232 versions of Honeywell HPA HPB PPT PPTE and PPTR pressure transducers The 6 digit display features 0 56 inch tall LED characters that are readable in bright sunlight The RDD100 is a digital input instrument acceptin
4. etes 0 MA Transducer and RDD100 together 4 2 2 Start Up aaaanannnnonuannununnnnonanarnununannonararnununanonarannnnnnn 350 mA Power Comme ction ooo cccccccceccocceccescecceseesseeuceceeecaseeses 2 5 x 5 5 x 10 mm I D x O D x length www honeywell com RDD100 User Guide Honeywell 5 OPERATING ENVIRONMENT 5 1 Operating Temp Range oii ccecscccsscescesesceseseeteeeeeees 20 C to 60 C 5 2 Storage Temp Range ooo cceseccscecceccecesceccecsecsececeansees 25 C to 85 C 5 3 Relative Humidity 0 to 90 non condensing 6 DIMENSIONS 6 1 Overall 3 8 in W x 2 0in H 50 B r FN RA Er SES i din E E T ADAN a RDD100 Connections 2 6 ft transducer cable 9 pin cable 6 or 10 ft ue Honeywell RS 232 4 D Pressure Transducer 5 E zOO Personal Computer v o AN Wall mounted 12V DC supply 235 1245 RDD100 Figure 1 RDD100 Connections 1 This cable allows a personal computer with suitable software to communicate through the RDD 100 to the transducer Data can be logged and transducer parameters set reviewed Length of cable can be chosen when RDD100 is ordered At the PC USB to RS 232 converters can be used 2 Separate cables are available for transducers with Metal or Plastic electrical connectors Standard cable length is 6 feet 1 8 m Connectors may be purchased from Honeywell to construct custom length cables Due to RS 232 l
5. g a continuous stream of digital data transmitted in RS 232 format from the transducer The transducer may be installed at the source of the pressure being measured a cable up to 50 feet in length may separate the transducer from the RDD100 A wall mounted AC to DC power supply which powers both the RDD100 and the transducer is supplied with the display Alternatively a user may provide 12V 3V DC from a system power supply The RDD100 has a 9 pin D connector mounted on the rear panel to connect to a personal computer The computer can perform data collection while the RDD100 is continuously displaying readings The computer can also be used to send commands to the transducer two way communications The RDD100 is housed in a compact enclosure measuring approximately 3 8 x 2 x 4 4 inches WxHxD The instrument may be used on a tabletop or can be easily installed in a panel using the supplied mounting hardware Pressure Transducer Description The RDD100 receives pressure readings from an RS 232 Honeywell pressure transducer HPA HPB PPT PPTE and PPTR Accuracy of the displayed pressure reading is determined solely by the accuracy of the transducer Typical PPT accuracy for example is 0 05 of full scale FS Digital output resolutions up to 0 0011 FS are possible but are dependent upon the pressure display units selected Although many of the support transducers also have a 0 5V analog output only the digital output is used by the
6. igured for continuous readings can be configured for use with the RDD100 by connecting it to the COMM port of a PC as shown in Figure 1 The HPA B PPT PPTR E Demo program or a terminal emulator program such as HyperTerminal may be used to send RS 232 formatted serial data to the COMM port www honeywell com 3 RDD100 User Guide Honeywell 2 3 2 4 The Demo program or PC terminal emulator port parameters should be set up as follows Baud Rate 9600 Start Bits 1 Data Bits 8 Stop Bits 1 Parity None Local Echo On Also configure the program to attach a line feed to the carriage return This completes the set up of the PC terminal emulator Next the transducer must be configured to match the above terminal emulator settings Settings listed above are the factory default settings for the HPA HPB PPT PPTE and PPTR and are therefore likely to be correct Set Transducer Baud Rate When a Honeywell digital transducer connected to a computer as described above is first powered up a start up message will be sent from the transducer If the transducer baud rate is not set at 9600 either no message or a garbled message will be received In this case it will be necessary to try other baud rates until a match is found Possible baud rates for the HPA HPB PPT PPTR and PPTE are 1200 2400 4800 9600 14400 19200 and 28800 Once a match is found the transducer can be changed to a baud rate of 9600 which will allow it to communicate
7. ill light indicating that no further updates are being made Reestablishing connection to the transducer will result in a continuation of reading updates and the error LED will turn off NOTE the RDD100 may appear to be in this condition if the transducer has been programmed with a long integration time or idle count yielding long durations between readings It is recommended that the transducer be programmed to provide 1 or more readings per second to prevent this possible confusion The typical factory default reading rate is 5 second 3 2 6 Over Under Ranged Transducer Indications In the event that a transducer experiencing an applied pressure or temperature which is over or under the specified range is connected to the RDD100 the following will be indicated Sequence 1 If a transducer that is in an over under ranged condition is connected to the RDD100 and then the power is applied to the RDD100 the result will be a start up message that continuously displays rEAdY Sequence 2 If the RDD100 is powered up and then an over under ranged transducer is connected to the RDD100 the result will be a blank display and the error LED will light Once the over under range condition is removed normal operation of the RDD100 will be restored POWER REQUIREMENTS VONAGE ones cccescsccseccecsecceceaecesesccscesecaccessaccaseaecateeesensnssass 12 3 VDC Current 4 2 1 Operating o cccssccescescesssssssecesserceesessareeestestsserereee
8. imitations recommended maximum length is 50 ft 15 m 3 12 VDC plug is 2 5 x 5 5 x 10 mm I D x O D x length Center pin may be either positive or negative polarity Honeywell International Inc Honeywell 12001 Highway 55 Plymouth MN 55441 Form 900221 3 September 2005 Tel 800 323 8295 2005 Honeywell International Inc www honevwell com
9. st of its display segments and its error LED The error LED is located beneath the least significant digit of the display All segments should light for a brief period and then the display transitions to rdd100 followed by the message rEAdY If a transducer is properly set up and connected to the RDD100 pressure readings will appear on the display Error Indications 3 2 1 No Transducer Connected If the RDD100 does not detect a transducer set to send continuous readings the display will go through the segments and LED check display rdd100 display rEAdY and then go dark with the error LED illuminated 3 2 2 Incorrect Baud Rate If the RDD100 sees a transducer set to the wrong baud rate the display will go through the segments and LED check display rdd100 display rEAdY and hold with the rEAdY message 3 2 3 Not Set Up To Continuously Transmit If the RDD100 sees a transducer that has not been set up to continuously transmit the display will go through the segments and LED check display rdd100 display rEAdY and hold with the rEAdY message 3 2 4 Wrong Polarity Of DC Power The RDD100 is equipped with the reverse polarity protection diodes at its power input The instrument will operate with either polarity 3 2 5 Transducer Disconnected While Transmitting If the transducer is disconnected while transmitting the last reading received will remain on the display and the error LED w
10. ut will be 60 000 instead of 10 000 Also a 500 psi device will output full scale 600 00 instead of 500 00 PFS generally provides the highest readout resolution available when using the RDD100 readout 2 5 Continuous Transmit Mode Type 99we lt cr gt Resp 99WE Command Echo Type 99mo p2 lt cr gt Continuous Pressure Transmit Command Resp 99MO P2 Command Echo 2 6 Changes Stored In EEPROM Type 99we lt cr gt Write Enable Command Resp 99WE Command Echo Type 99sp all lt cr gt Store Parameters Command Resp 99SP ALL Command Echo 2 7 Verifying Stored Parameters After cycling power to the transducer the RDD100 should now display pressure readings in the selected display units If there is a need to interrogate the transducer to observe its set up parameters this can be done using the following sequence Type 99du lt cr gt Resp 99DU INHG lf transducer is set to read inches of mercury Although the Display Units example was used this method of interrogation will work with any of the set up parameters listed above and in the associated User s Manuals Note Since pressure units are not a part of the RDD100 display the user may want to attach a sticker or some other indication of the pressure units either on or near the display window www honeywell com 5 RDD100 User Guide Honeywell 3 3 1 3 2 4 1 4 2 4 3 OPERATION Start Up Messages When the RDD100 is powered up it goes through a te
11. with the RDD100 instrument The procedure for changing and then storing a new baud rate for the transducer is shown below The commands below all use a broadcast address 99 to allow them to operate correctly even if the transducer address has been changed from the factory default setting which is address 01 With the PC and transducer operating at the baud rate found to return a non garbled start up message Type 99we lt cr gt Carriage Return Resp 99WE Command Echo Type 99bp n9600 lt cr gt Resp 99BP N9600 Command Echo This will change the transducer to 9600 baud with no parity Once this command is executed the PC will again lose communication with the transducer since they will be on different baud rates Do no power down the transducer at this point since the change is only temporary The PC terminal emulator can now be changed to 9600 baud and should be able to communicate with the transducer This can be checked by typing 99p1 lt cr gt which should return a single pressure reading Continue as follows in order to store the new baud rate and parity into the transducer EEPROM Type 99we lt cr gt Resp 99WE Command Echo Type 99sp all lt cr gt Store Parameters Command Resp 99SP ALL Command Echo After cycling power to the transducer it should now communicate with the PC set at 9600 baud Setting Transducer Display Units Inquiry for the current display units Type 99du lt cr gt Resp 01DU PSI If
Download Pdf Manuals
Related Search