Instrutech CVM211 User Manual

Instruction Manual CVM211 Stinger
InstruTech Page 3
1 Introduction / General Information
1.1 Description
Thermal conductivity gauges measure pressure indirectly by sensing the loss of heat from a sensor to the
surrounding gases. The higher the pressure of the surrounding gas, the more heat is conducted away from the
sensor. Pirani thermal conductivity gauges maintain a sensor (usually a wire) at some constant temperature,
and measure the current or power required to maintain that temperature. A standard Pirani gauge has a useful
measuring range of about 10
-4
mbar to 10 mbar. By taking advantage of convection currents that are generated
above 1 mbar, convection-enhanced Pirani gauges increase the measuring range to just above atmosphere.
The InstruTech® CVM211 Stinger™ module provides the basic signal conditioning required to turn a convection
vacuum gauge into a complete measuring instrument. There are two different models of Stinger. One model
provides a non-linear analog output, and one setpoint relay. The non-linear analog output is identical to the
MKS Instruments / Granville-Phillips® "S-curve". The other model provides a Log-linear analog output, and one
setpoint relay. A built-in display provides a convenient user interface for setup and operation of the vacuum
gauge. This User Manual is intended to be used with CVM211 displaying pressure in bar / mbar units of
measure.
1.2 Specifications
measurement range
1.3 x 10
-4
to 1,333 mbar / 1 x 10
-4
to 1,000 Torr / 1 x 10
-2
Pa to 133 kPa
accuracy - N
2
(typical)
1.3 x 10
-4
to 1.3 x 10
-3
mbar; 0.1 x 10
-3
mbar resolution
1.3 x 10
-3
to 530 mbar; ± 10% of reading
530 to 1,333 mbar; ±2.5% of reading
repeatability - (typical)
± 2% of reading
display
3 digit LED from 1.33 bar to 10.0 x 10
-3
mbar
2 digit LED from (9.9 to 1.0) x (10
-3
mbar), 1 digit LED from (0.9 to 0.1) x (10
-3
mbar)
materials exposed to gases
gold-plated tungsten, 304 & 316 stainless steel, glass, nickel, Teflon®
internal volume
26 cm
3
(1.589 in
3
)
internal surface area
59.7 cm
2
(9.25 in
2
)
weight
136 g (4.8 oz.)
housing (electronics)
molded plastic
operating temperature
0 to +40
o
C
storage temperature
-40 to +70
o
C
bakeout temperature
+70
o
C max
humidity
0 to 95% relative humidity, non-condensing
altitude
operating; 8,200 ft. (2,500 m) max storage; 41,000 ft. (12,500 m) max
mounting orientation
horizontal recommended (orientation has no effect on measurements below 1 Torr)
analog output
log-linear 1 to 8 Vdc , 1 V/decade, or
non-linear analog S-curve 0.375 to 5.659 Vdc (Granville-Phillips® compatible)
input power
12 to 28 Vdc, 2 W protected against power reversal and transient over-voltages
setpoint relay
one, single-pole double-throw relay (SPDT), 1 A at 30 Vdc resistive, or ac non-inductive
connector
9-pin D-sub male
CE compliance
EMC Directive 2004/108/EC, EN61326-1, EN55011
Low Voltage Directive 2006/95/EC, EN61010-1
environmental
RoHS compliant

Instrutech CVM211 Specifications

General

Brand	Instrutech
Model	CVM211
Category	Measuring Instruments
Language	English