Introduction / General Information; Description; Specifications - Instrutech CVM211 User Manual

Instruction Manual

Introduction / General Information

1

Description

1.1
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
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.

Specifications

1.2
measurement range
accuracy - N (typical)
2
repeatability - (typical)
display
materials exposed to gases
internal volume
internal surface area
weight
housing (electronics)
operating temperature
storage temperature
bakeout temperature
humidity
altitude
mounting orientation
analog output
input power
setpoint relay
connector
CE compliance
environmental
InstruTech
-4
mbar to 10 mbar. By taking advantage of convection currents that are generated
-4
1.3 x 10 to 1,333 mbar / 1 x 10
-4
1.3 x 10 to 1.3 x 10
-3
1.3 x 10 to 530 mbar; ± 10% of reading
530 to 1,333 mbar; ±2.5% of reading
± 2% of reading
3 digit LED from 1.33 bar to 10.0 x 10
2 digit LED from (9.9 to 1.0) x (10
gold-plated tungsten, 304 & 316 stainless steel, glass, nickel, Teflon®
3 3
26 cm (1.589 in )
2 2
59.7 cm (9.25 in )
136 g (4.8 oz.)
molded plastic
o
0 to +40 C
o
-40 to +70 C
o
+70 C max
0 to 95% relative humidity, non-condensing
operating; 8,200 ft. (2,500 m) max
horizontal recommended (orientation has no effect on measurements below 1 Torr)
log-linear 1 to 8 Vdc , 1 V/decade, or
non-linear analog S-curve 0.375 to 5.659 Vdc (Granville-Phillips® compatible)
12 to 28 Vdc, 2 W protected against power reversal and transient over-voltages
one, single-pole double-throw relay (SPDT), 1 A at 30 Vdc resistive, or ac non-inductive
9-pin D-sub male
EMC Directive 2004/108/EC, EN61326-1, EN55011
Low Voltage Directive 2006/95/EC, EN61010-1
RoHS compliant
-4
to 1,000 Torr / 1 x 10
-3 -3
mbar; 0.1 x 10 mbar resolution
-3
mbar
-3
mbar), 1 digit LED from (0.9 to 0.1) x (10
storage; 41,000 ft. (12,500 m) max
CVM211 Stinger
-2
Pa to 133 kPa
-3
mbar)
Page 3