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Instruction Manual
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
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
1
2
3
4
5
6
7
8
9
InstruTech, Inc
InstruTech CVM-211 "Stinger" Convection Vacuum Gauge Module
PIN DESCRIPTION
Relay 1 Normally Open
Relay 1 Normally Closed
Power Input (11-30Vdc)
Power Ground
Analog Output (Non-linear GP Compatible, or Log-Linear 1-8V)
Relay 1 Common
Relay Disable (Disables Relay 1 when pulled low)
Analog Ground
®
modules that have a 9-pin D connector, and
page 6
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