FRG-700 Inverted Magnetron Pirani Gauge
24
r
While depressing the tactile switch with a cylindrical pin
(ø
≈
3 mm), adjust the <HV> potentiometer by means of a
1.5 mm screwdriver …
… to 4.20 V
or
… to 5×10
-4
mbar
s
Vent the gauge with air or nitrogen to atmospheric pres-
sure, and wait at least 10 minutes.
t
Turn the nameplate clockwise until the mechanical stop is
reached.