Setup And Operation; Applying Power; Overpressure Shut Down; Activating The Sensor - Instrutech Hornet CCM502 User Manual

Instruction Manual

4 Setup and Operation

4.1 Applying power

Connect power to the CCM502 using the designated pins 4 and 2 of the 9-pin D-sub connector. Alternatively,
you can power the device by connecting InstruTech's PS501-A power supply to the connector. Read this user
manual in its entirety before activating the sensor. Refer to
details.

4.2 Overpressure shut down

The user must turn off the high voltage to sensor before pressure rises above 7.60 x 10
signal output will be erroneous with the sensor turned on above 7.60 x 10

4.3 Activating the sensor

Before you turn on the anode high voltage and activate the sensor, make sure you understand all instructions
and information provided in this manual. You can activate the sensor by one of the following methods:
1) Digital Input - See section 3.2.3
2) Using a Convection gauge relay to activate the cold cathode sensor
Because the useful operating range of the InstruTech's cold cathode CCM502 is from 7.60 x 10
-3
7.6 x 10 Torr, another vacuum gauge capable of measuring pressures above 7.60 x 10
determine when to turn on the high voltage to anode voltage and activate the sensor. This can be implemented
by using signals from another gauge such as an InstruTech convection enhanced Pirani (CG) gauge. For example,
you may use an InstruTech CVM211 Stinger™ or the CVM201 Super Bee™ convection gauge to activate or
deactivate the cold cathode sensor. The setpoint relay from the CVM211 or CVM201 can be physically wired to
the cold cathode connector (see typical connection scheme below). The relays in the CVM211 or CVM201 can
be configured to energize at the desired pressure at which the cold cathode sensor will be activated. The cold
cathode sensor is activated (operational) by applying a continuous ground thru the relay connections of the
CVM211 or CVM201. The sensor is deactivated when relay is de energized discontinuing the application of
ground.
CAUTION! Activating the sensor at pressures higher than 7.60 x 10
buildup and incorrect pressure measurement.
InstruTech
Pin 1 (low active)
section 4.3 titled "Activating the sensor" for further
-3
Torr.
CCM502 Hornet
Connector DE-9P
-3
Torr may result in contamination
CCM502 Hornet
-3
Torr, otherwise the
-10
Torr to
-3
Torr should be used to
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