GE RPT 301 User Manual
GE
Sensing
RPT 301
Digital Output Pressure Transducer
User Manual K177
© General Electric Company. All rights reserved.
RPT 301
Digital Output Pressure Transducer
User Manual
K177
© Druck Limited 1998
This document is the property of Druck Limited and may not, either in part or whole, be copied or
otherwise reproduced, communicated in any way to third parties, nor stored in any Data Processing
System, without the express written authority of Druck Limited.
K177 Issue No. 3
K177 Issue No. 3
RPT 301 User Manual i
Safety
The manufacturer has designed this instrument to be safe when operated
using the procedures detailed in this manual. Do not use this instrument for
any other purpose than that stated. Do not apply values greater than the
maximum value stated.
This manual contains operating and safety instructions that must be
followed for safe operation and to maintain the instrument in a safe
condition. The safety instructions are either warnings or cautions issued to
protect the user and the equipment from injury or damage. Use qualified*
technicians and good engineering practice for all procedures in this manual.
Pressure
Do not apply pressure greater the maximum safe working pressure to the
instrument.
Electrical Safety
This instrument is designed to be safe when using options and accessories
supplied by the manufacturer.
Toxic Materials
There are no known toxic materials used in this instrument.
Maintenance
The instrument must be maintained using the manufacturer’s procedures
and should be carried out by authorised service agents or the manufacturer’s
service departments.
Technical Advice
For technical advice contact the manufacturer or subsidiary refer to section
5.5.
* A qualified technician must have the necessary technical knowledge,
documentation, special test equipment and tools to carry out the required
work on this instrument.
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ii RPT 301 User Manual
Abbreviations and Symbols
The following abbreviations are used in this manual.
Note:
The following symbols are used in this manual
Abbreviations are the same in the singular and plural.
EMC electromagnetic compatibility
FS full-scale
IEC International Electrical Council
inHg inch of mercury
2
kg/cm
kPa kilo Pascal
mA milli Ampere
mm milli metre
NL, H & R non-linearity, hysteresis and repeatability
PCB printed circuit board
psi pound per square inch
RPT resonant pressure transducer
V Volt
VA Volt amp
kilogram per centimetre squared
Hazard, a warning highlighting a danger that would result in
injury. Also a marking on the instrument referring the user to
this publication.
CE
K177 Issue No. 3
This symbol, on the instrument or in the manual, indicates a
static sensitive component.
This product meets the essential protection requirements of
the relevant EEC directives. Further details of applied standards may be found in the product specification.
RPT 301 User Manual iii
Table of Contents
1 Introduction ................................... 1
1.1 Description ................................................ 1
1.2 Specification .............................................. 1
2 Installation ..................................... 4
2.1 Mounting the Transducer ......................... 4
2.2 Pressure Connection ................................ 4
2.3 Electrical Connection ................................ 6
3 Operation ....................................... 11
3.1 System Operation ..................................... 11
3.2 Command Summary ................................. 11
3.3 General Command Format ....................... 13
3.4 General Reply Format ...............................15
3.5 Error Message .......................................... 15
3.6 Detailed Command Definitions ................ 17
4 Calibration ..................................... 23
5 Maintenance .................................. 26
5.1 General ...................................................... 26
5.2 LED Indicator ............................................ 26
5.3 Diagnostic Mode ....................................... 26
5.4 Cleaning .................................................... 27
5.5 Approved Service Agents ......................... 28
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iv RPT 301 User Manual
K177 Issue No. 3
RPT 301 User Manual 1
1 Introduction
1.1 Description
The RPT 301 Digital Output Pressure Transducer measures air pressure
applied to the connection port and produces an electrical output. It
comprises a resonant sensor connected to a printed circuit board to
produce a serial digital output and is contained in a metal enclosure to
IP65 standard. The instrument is designed to communicate with
compatible equipment using a serial communications system which
can be selected by the user for either RS232 or RS485 standard
communications interface. The power supply for the instrument is a
wide tolerance DC voltage with a low power consumption A remote
start-up facility enables the instrument to be remotely switched on and
off to save power.
1.2 Specification
Accuracy
Non-linearity, hysteresis and repeatability:
Temperature affects: ............... ±0.02% FS over operating temperature range
Long term stability:
Ranges
Dimensions
Weight: ...................................................................................... 0.65 kg
Size: ...................................................... 125 mm x 80 mm x 57 mm
Environment
Operating temperature range ..................................................... -20 to + 60 C
Storage temperature range ......................................................... -40 to + 80 C
Sealing: ........................................................................................... IP65
Standard ................................................................. ± 0.02% FS
Option A .................................................................. ±0.01% FS
Standard ............................................. 150 ppm per 12 months
Option A ............................................. 100 ppm per 12 months
.................................................................. 750 to 1150 mbar a
.................................................................... 35 to 1300 mbar a
.................................................................... 35 to 2620 mbar a
.................................................................... 35 to 3500 mbar a
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2 RPT 301 User Manual
Power supply
Electrical Safety: .......................................... EN61010 (IEC 1010) as applicable
Electromagnetic compatibility
Switch on
Pressure measurement
Measurement cycle: ........................................ Fixed, nominally 0.5 seconds
Reading Filter:
Reading Resolution: ........................ Programmable number of decimal places
Data Communications:
Power Control
(Remote Start-Up) A floating ‘volt free’ two-wire control input is provided
Pressure connection
Pressure medium compatibility: .......................
Voltage .............................................................. 4.5 to 32 V DC
Power .......................... 0.6 Watts at 5 V to 0.75 Watts at 32 V
............................................................ EN50081-1 (emissions)
............................................................. EN50082-2 (immunity)
Settling Time: ... Less than 5 seconds (with filtering disabled)
Single pole low pass filter, variable time constant and step response
Serial RS232 or RS485 (selectable)
Software or hardware handshaking on RS232
software handshaking only on RS485.
to enable the instrument to be remotely switched on
or off.
.............................................................................. G1/8 female
overpressure ................................... 1.25 x calibrated full-scale
pressure containment ................................................... 5 bar a
Dry gases compatible with:
Glass, Silicon, Titanium, Stainless Steel and Epoxy adhesive
Note: Continuing development sometimes necessitates specification changes
without notice.
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RPT 301 User Manual 3
Accessories
The following items are delivered with the instrument after manufacture.
User manual K177 (this publication)
Calibration certificate
Mating electrical connector (if ordered)
K177 Issue No. 3
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