Teledyne Marine Instruments 2002 Instrukcja Użytkownika Strona 23
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149-072011 Model 2002 Vacuum Gauge Page 23 of 38
6. Communications Option Board
Both RS-232 and RS-485 communication interface boards are available as an option for the Model 2002.
The communication option boards allow data to be output to a host computer with the appropriate interface.
Connection to the RS-232 or RS-485 communication interface boards are via a 9 pin D-subminiature female
connector.
6.1. RS-232-E Interface Specifications
Format.................................................... EIA standard RS-232-E, full-duplex, no handshaking, asynchronous
Data Rate ...........................................................................................................................................9600 baud
Character Length ......................................................................................................................... Eight data bits
Parity ....................................................................................................................................................No parity
Stop bits .......................................................................................................................................... One stop bit
A common application of the RS232 version of the HPM-2002, is to connect the pressure gauge directly to
the serial port of a PC. This is done by first wiring a communication cable in the manner shown below.
PIN MNEMONIC SIGNAL DESCRIPTION
2 TX Transmit Data Transmits data within RS-232-E voltage levels
3 RX Receive Data Accepts data within RS-232-E voltage levels
5 SG Signal Ground
Establishes the comm on ground reference
potential for all interchange circuits
when
232-E.
Communicating via RS-232-e
4CTSClear to Send
Host co mputer re ady to accept data.
(Reserved for future use, no t implem ented
by present software.
8RDY Ready
Ready to receive data (always high,
not implemented by present software).
- TELEDYNE 1
- HASTINGS 1
- Manual Print History 2
- 1. General Information 4
- 2. Installation 6
- 2.5. Initial Operation 7
- 3. Front Panel Operation 8
- 9
- 3.2. RUN Mode 9
- Mantissa exponent 9
- 3.4. CAL Mode 10
- 3.5. GAS Mode 12
- 3.6. UNITS Mode 13
- 4. Rear Panel Description 14
- 4.3. TTL Outputs 16
- 4.4. Power Entry Module 16
- Fig 4.2 16
- 5. Theory of Operation 18
- 5.2. Pirani Sensor 20
- Eg = (Kg DT As)/Dx 21
- 5.3. Dual Sensor Operation 22
- COMMAND SYNTAX 24
- Interrogation Commands 25
- Reset / Restore Commands 27
- Device Status 27
- 8.1. 4-20 mA Interference 29
- Connector Pin Assignments 29
- 10. Troubleshooting Guide 33
- 11. WARRANTY 34
- 12. Diagrams and Drawings 35
- Page 36 of 38 36
- Page 37 of 38 37
- Model 2002 37
- Outline Dimensions 37
- Page 38 of 38 38
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