Instruction Manual InstruTech CVM-211 "Stinger" Convection Vacuum Gauge Module
InstruTech, Inc page 6
Installation - Electrical
Grounding: Be sure the vacuum gauge and the rest of your vacuum system are properly grounded to protect
personnel from shock and injury. Be aware that some vacuum fittings, especially those with O-rings, do not
produce a good electrical connection between the gauge and the chamber it is connected to.
A good recommended practice is to remove power from any cable prior to connecting or disconnecting it.
The InstruTech CVM-211 will directly replace GP Mini-Convectron
®
modules that have a 9-pin D connector, and
you can use your existing cables and electronics.
For new installations, fabricate a cable to connect to the signals/functions you want to use. Signals and pin
assignments are described below:
PIN NUMBER PIN DESCRIPTION
1 Relay 1 Normally Open
2 Relay 1 Normally Closed
3 Power Input (11-30Vdc)
4 Power Ground
5 Analog Output (Non-linear GP Compatible, or Log-Linear 1-8V)
6 Relay 1 Common
7 Relay Disable (Disables Relay 1 when pulled low)
8 Analog Ground
9
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