BG 5195 BEN / A (2011-05) TPG261.oi 43
Behavior in the event of an underrange with Cold Cath-
ode Gauges (Penning underrange control).
Available for:
Pirani Gauge
(TPR)
Pirani Capacitance Gauge (PCR)
; Cold Cathode Gauge
(IKR)
FullRange™ CC Gauge
(PKR)
Process Ion Gauge
(IMR)
FullRange™ BA Gauge
(PBR)
Capacitance Gauge
(CMR)
Piezo Gauge
(APR)
There is a number of possible causes of an underrange:
• the pressure in the vacuum system is lower than the
measurement range
• the measurement element has not ignited (yet)
• the discharge has failed
• a defect has occurred
Caution
Caution: relay is switching
An underrange can lead to unintended reac-
tions of the connected control system.
Prevent false control signals and messages
by disconnecting the sensor and control ca-
bles.
Underrange control
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