Teledyne instruction manual Model 2002 Control Unit, Specifications

1.3Model 2002 Control Unit

The Model 2002 control unit consists of the power supply, Pirani resistance bridge control, signal processing and display circuitry. The user interface consists of a flat panel display with smooth operat- ing tactile switches and large green LED digits (0.56"/14.2mm). The pressure is displayed in scientific format using a 3 digit mantissa and a 1 digit (plus the sign) exponent. The pressure can be displayed in Torr, mbar or Pascal. The instrument comes standard with 2 alarm setpoints that have TTL level digital outputs. An optional dual relay board can be internally mounted to trip on the alarm setpoints to turn on/off various equipment such as pumps, valves, heaters, bakeout ovens and safety equipment. An optional 4-20 mA or 0-10V analog output board is also available. The Model 2002 instrument accepts an external TTL level "Remote Zero" to zero the instrument when another instrument (e.g. an ion gauge) indicates that the pressure is less than 1x10-5Torr. The standard analog output is linear per decade directly corresponding to the control unit’s display. The Model 2002 comes calibrated for nitrogen. Conversion factors for other gases are selectable by the user (see section 3.5). This direct readout display allows for flexibility in user system configurations which operate with various gases.

An optional serial interface board can be installed to provide RS232 or RS485 support. The Model 2002 control unit fits a standard DIN 43700 insert (1/4 DIN) and mounts into a 3.62 in. (92 mm) square hole. The case is constructed of NORYL rated UL-94-V1 (self-extinguishing plastic) and is

equipped with mounting brackets that are adjustable up to 3/16” (4.8mm).

1.4Specifications

	Measuring range	1x10-4to 10+3 Torr
		1.3x10-4to 1.3x10+3 mbar
	Accuracy (N , T=230C)	+ 15% of reading (5x10-4to 3x10+1 Torr)
	2	+ 1.5% of reading (3x10+1 to 1x10+3 Torr)
	Ambient temperature operating range		00 to 500C
	Bakeout temperature (with transducer electronics removed)		2500C
	Analog output	1.0-4.5 Volts (0.5 VDC linear per decade)
	Process control	2 TTL outputs (1 TTL auto zero input)
!	Digital readout	Four green LED - resolution is three digit
			(plus exponent)
	Equipment operating range	120/240 V~, 0.25A, 50/60 Hz
		A 6 ft., 3-wire power cord is provided with each unit.
	Fuse		250 V, 1/4 A.
	Transducer mounting	Any position without recalibration.
	Transducer internal volume		<1.5cc
	Wetted material	Au, Si	N , Si, Pt, PyrexTM,
		3	4
		KovarTM and 316 stainless steel
	Stability with voltage	Variation in reading undetectable
		as power fluctuates within power specification.
	Weight (display, cable, and sensor)	Net: 2.5 lbs., Shipping: 3.4 lbs.
	Transducer response time	Typically, less than 150 msec for a step
		change from 10-3Torr to 10+3 Torr.
	Positive pressure	150 psig, Recalibration may be required
	if unit is exposed to pressures greatly exceeding measuring range.

page 6 Model 2002