MKS 20340-341-T1, Инструкция по эксплуатации

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4 Operation
37
Series 340 Vacuum Gauge Controller
Instruction Manual - 340005 - Rev. D
Example 3: True to Indicated Pressure Conversion
Assume you want to set a process control setpoint at a true pressure of 20 Torr of CO
2
. On Figure
4-6, locate 20 Torr on the true pressure scale, travel horizontally to the right to the CO
2
curve and
then down to an indicated pressure of 6.5 Torr (N
2
equivalent). Thus the correct process control
setting for 20 Torr of C0
2
is 6.5 Torr (N
2
equivalent).
Example 4: True to Indicated Pressure Conversion
Assume you want to obtain a helium pressure of 100 Torr in the system. On Figure 4-6, locate 100
Torr on the left hand scale, travel horizontally to the right to attempt to intersect the He curve.
Because the intersection is off scale it is apparent that this true pressure measurement requirement
for helium exceeds the capability of the instrument.