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Connecting the Pressure Gauge
The Terranova® 907 has a female 9-pin D-sub port located on the back of the control unit
labeled SENSOR(S) to connect the pressure gauge cable (see
Figure 2
). A special hybrid cable is
required to simultaneously connect both the
convection-enhanced Pirani and capacitance
diaphragm gauge to the control unit
. To connect both a Granville-Phillips 275 Convectron®
gauge (or equivalent gauge) and a compatible capacitance diaphragm gauge, the user will
require the Duniway gauge cable
HYB-275
. Similarly, the user will require the Duniway gauge
cable
HYB-CEP
to connect the MKS / HPS Series 317
convection-enhanced Pirani gauge
and
compatible capacitance diaphragm gauge to the control unit.
Figure 2
. Terranova® 907 back view
Terranova® 907 should be OFF before connecting the pressure gauge(s).
Plugging or unplugging the pressure gauge while the control unit is ON can
damage pressure gauge internals.
To properly connect the Terranova® 907 to the respective pressure gauges:
1.
Secure the pressure gauge cable ends to the sensors
2.
Secure the male 9-pin D-sub connector of the cable to the SENSOR(S) port
3.
Fasten retainer screws (where applicable) on all cable connections
Figure 3
. Pressure gauge orientation
The recommended convection-enhanced Pirani gauges should be installed with the axis
horizontal as shown in
Figure 3
with the port pointing downward. Large errors can result at
higher pressures if the axis is not horizontal. User should always ensure the pressure gauge is
securely connected to the vacuum system before use.
Use of a pressure gauge other than the suggested types may lead to
improper readings and / or cause damage to the pressure gauge.
