Chapter Seven: Operation in Setup Mode
Code 18x: How To Select the Convection Gauge
245
Code 18x: How To Select the Convection Gauge
LEFT DISPLAY
The code number is
displayed and edited here.
In this example, the
code number is 18x,
where x represents
the channel number
of a convection gauge.
MAIN DISPLAY
This displays toggles between Cn for a Convectron
and CP for a CEP gauge.
SETUP
CODE
Figure 82: Code 18x Display
The 146 instrument now supports the HPS Convection Enhanced Pirani (CEP) gauge. This
gauge replaces the Alcatel PI 3C gauge.
When the 146 instrument detects the type of gauge attached to each channel, it can distinguish
between a Pirani and convection gauge. However, it cannot distinguish between the two
convection gauges: the Granville-Phillips Convectron
®
gauge and the HPS CEP gauge. The
default convection gauge selection is the Convectron gauge. If you are using a CEP gauge, you
must change the convection gauge type to CEP. No additional commands are required if you are
using either a Convectron gauge or a standard Pirani gauge.
Note
Turn the channel off before you attempt to change the convection gauge
type. The command will not be accepted if the channel is on.
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