Convectron Ionization Gauge Controllers

Granville - Phillips Model 475 for accurate low vacuum measurement

High performance compact vacuum controller for bench top and panel mount applications
Wide range vacuum pressure measurement from atmosphere to 1 x 10^-4 Torr (1 x 10^-4 mbar, 1 x 10²Pa
Direct replacement for the Series 375 Convectron Gauge Controller
Highly visible Vacuum Florescent Display (VFD)
Highly configurable I/O options including analog outputs, setpoint relays, serial communication interface
Pre-programmed gas curves for N₂, Ar, He, CO₂, and O₂
Intuitive menu control for simplified configuration and parameter setup
Self diagnostics
RoHJS/CE Compliant

Series 475 Convectron gauges provide useful pressure measurement over 7 decades from 10^-4 to 1000 Torr, or from 1 x 10^-3 mbar to 1000 mbar. This innovation in the art of vacuum measurement is accomplished with a single gauge tube and controller. The Series 475 gauge tube contains a temperature compensated heat loss sensor which utilizes conduction cooling to sense pressure at lower pressures. At higher pressures, it utilizes convection cooling in which gas molecules are circulated through the gauge tube by gravitational force.

Their wide useful range, highly predictable performance and low prices make Convectron gauges an excellent replacement for conventional thermocouple and Pirani gauges. They also are the measurement systems to consider in applications where conventional thermocouple and Pirani gauges have not been suitable because of limited range, or drift, or slow response.

Convectron gauges may be considered for use in certain applications where more expensive gauges such as capacitance manometers would be the first choice were it not for their higher cost.

Convenience and Versatility

The Convectron gauge is designed to give "plug-in-and-read" convenience. No pre-installation calibration is required because it is computer calibrated prior to shipment. It snaps into an instrument panel cutout without tools or hardware.

Convectron gauges offer the following advantages relative to thermocouple gauges:

System performance can be monitored continuously from atmosphere down without pressure blind spots.
Purchase of additional controller and gauge tube models is not necessary if your needs change to different segments of the range.
A much wider range can be covered with one Convectron gauge than with thermocouple gauges.
There is no chance of error that might be caused by using the wrong gauge tube-controller combination. One gauge tube fits all controller models.

NOTE: Due to their wide pressure range, convectron gauges can replace both thermocouple and Pirani gauges.

Accuracy

The accuracy of Convectron gauges is exceptionally good. Close attention has been given in the design to minimize those factors which produce errors in conventional heat loss transducers.

High Repeatability

Repeatability of Convectron gauges is excellent. For example, in typical tests at constant temperature, Convectron gauges were repeatable to 1/10 millitorr at 1 millitorr (1 x 10^-4 mbar at 1 x 10^-3 mbar) as measured by a precision digital capacitance manometer.

Fast Response time

The sensor in a Convectron gauge tube operates in an electronic feedback loop which keeps its temperature nearly constant. Thus response time is very fast because components do not have to change temperature significantly as pressure changes.

Fig.1 - Comparison of the range of a single convectron gauge with the range of typical thermocouple and Pirani gauges.

Series 475 Gauge Features

Wide Measurement Range

Direct replacement for Series 375 Convectron Controllers and allows vacuum system performance to be monitored continuously from atmosphere to 1 x 10^-4 Torr (1 x 10^-4 mbar, 1 x 10^-2 Pa)

High Measurement Resolution

Designed to take full advantage of Convectron Gauge technology with 1 Torr (1 mbar, 0.1 Pa) resolution at atmosphere and 0.1 mTorr (1 x 10^-4 mbar, 1 x 10^-2 Pa) resolution at low pressure.

Vacuum Fluorescent Display

The VFD is easier to read from greater distances than other types of displays. The display is configurable to use scientific notation or two ranges (Torr and mTorr, mbar and 10^-3 mbar, or kPa and Pa) to provide a continuous measurement readout from atmosphere to low pressure.

Process Setpoint Option

Relay contacts allow control of other vacuum equipment, such as valves, pumps, heaters, alarms, and safety interlocking

Multiple Gas Curves

Selsctable N₂, Ar, He, CO₂ and O₂ gas curves are pre-programmed, eliminating the need for individual calibration when changing the process gas.

Push-Button Controlls

Calibration and setpoint settings are easy to adjuxt using intuitive front panel controls. No special tools are required

Easy-to-use Analog Signals

Provides a one volt per decade logarithmic signal (0 - 7V or 1 - 8V) or a selectable non-linear signal (0 - 9V) that is backwards compatible with older Convectron Gauge controllers

Serial Communication Interface Option

RS-232 interface allows easy integration with computer controlled systems.

Built-in Convectron Gauge Simulator

Simulates a Convectron Gauge, which allows system diagnostics without the need of a vacuum system

Self Diagnostics

the A/D (Convectron Gauge bridge voltage) and analog outputs are continuously monitored for erroneous readings.

Compact 1/8 DIN Controller

Easy to install in space restricted locations.

Rugged All-Metal Package

Provides a high level of immunity to RF noise and is RoHS / CE Compliant

Technical Specifications
Measurement Range * ‡
	Torr	1 x 10^-4 to atmosphere
	mbar	1 x 10^-4 to atmosphere
	Pa	1 x 10^-2 to atmosphere
Resolution	1 x 10^-4 Torr, 1 x 10^-4 mbar,1 x 10^-2 Pa
Display	Vacuum Flourescent Update Rate: Every 0.5 sec
Input Power	12 to 24 Vdc, 6 W continuous
Weight	720 gn (25 oz)
Operating Temperature	0°C to 40° ambient, non-condensing
CE Compliance>
	Safety	Low Voltage Directive 2006/95/EC, EN61010-1
	EMC	EMC Directive 2004/104/EC, EN61326-1:2006
	Environmental	RoHS Compliant
Setpoint relays (optional)
	Contact Rating	5A at 250VAC resistive load
	Range	1 x 10^-3 to 1000 Torr, 1 x 10^-3 to 1333 mbar, 1 x 10^-1 Pa to 1333 kPa
	Resolution	2 significant digits
Communicative Interface (optional) RS-232
	Data format	ASCII, 8 data bits, one stop-bit, no parity, no handshake
	Baud rate	1200, 2400, 4800, 9600, 19200, 38400, (19200 Default)
Convectron Gauge
	Sensor material	Gold-plated tungsten, platinum
	Other materials exposed to gas	304 stainless steel, borosilicate glass, Kovar, alumina, NiFe alloy, polyimide
	Internal volume	40 cm³ (2.5 in³
	Weight	85 grams (3 ounces)
	Gauge operating temperature	0°C to 50°C ambient, non-condensing
	Gauge bakeout temperature	150°C maximum, non-operating, cable disconnected
	Mounting Orientation	Horizontal Preferred
	Cable bakeout temperature	105°C maximum

* Measurements will change with different gases and mixtures. Correction parameters for common gases are provided in the instruction manual.
‡ Convectron Gauges are not intended for use with flammable or explosive gases.

Part No.	Description	est wt.	Quantity In Stock	Price	Quantity to order
UOM=EA
Convectron Vacuum Gauge Controller
475001AAT	Controller RS232 - 0 set points; Torr Reading *	0	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$795.00
475001A2T	475 CONTROLLER/TORR/115V RS-232 OPTION; 2 SETPOINT RELAYS; TORR READING *	0	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$895.00
IGC475T	475 CONTROLLER/TORR/115V	0	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$895.00
IGC475M	475 CONTROLLER/MBAR 115V *	0	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$895.00
Convectron Gauges
275071	1/8in NPT Convectron Gauge Tube (HP #0960-0540)	0.25	9	$245.00
275185	ION GAUGE TUBE VCR FITTINGS	0	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$155.00
275282	1/2 INCH VCR-FEMALE FITTI	0	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$190.00
275256	1 5/16 ROTATABLE MINI FLANGE"	0	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$191.00
275238	CONVECTRON GAUGE TUBE - 2.75""" ROTATABLE CONFLAT	0	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$191.00
275203	GRANVILLE CONVECTON TUBE	0	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$164.70
275196	NW25 Convectron Tube	0.25	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$205.00
275316	1/8 NPT WITH 1/2" TUBULAT	0	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$130.00
Power Supplies
4750081	POWER SUPPLY WALL MOUNT 115 VAC	0	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$97.25
4750083	POWER SUPPLY CE COMPLIANT 220 VAC EUROPE	0	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$97.25
Convectron Gauge Cables
47501210	10' CABLE	0	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	---	---
47501225	475 CONVECTRON CABLE-25'	0	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$165.00
47501250	475 CONVECTRON CABLE-50'	0	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$185.00
475012100	475 CONVECTRON CABLE-100'	0	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$275.00
475012200	475 CONVECTRON CABLE-200'	0	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$425.00
475012500	475 CONVECTRON CABLE-500'	0	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$875.00
[*L] Standard lead-time for out-of-stock items is approximately two weeks depending on the item. (#) Call for availability.
Ordering information. International (non-US) prices available through your local dealer.

* Controller Only: Purchase cables and tubes separately.

SIS Catalog Cross Reference
Page #	Part Numbers
B9 - Agilent 5971/5972/5973/5975 & GCD Accessories by S.I.S.	275071
F6 - Convectron™ Ionization Gauge Controllers	275071, 475001AAT
F7 - Vacuum Gauge Controller	275071, 275196

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