Absolute Valve Logic - Scanivalve DSA5000 Series Operation And Service Manual

DSA5000

Absolute Valve Logic

Absolute builds. This includes single (APx) and absolute dual range (ADR) units. Absolute transducers only have one input.
The negative side of the transducer is vacuum sealed.
Dual range units will have two CAL ports, one for each group of pressure ranges (L for channels 1-8, H for channels 9-16). The
valve operates the same, however the CAL ports are only common to the label group of channels.
( + )
Transducer
Figure C.13 - Measurement (PX) Mode
Absolute (including Abs.Dual Range) Valve Logic
Measurement (Px) Mode
( + )
Transducer
Figure C.15 - Purge (PRG) Mode
Absolute (including Abs.Dual Range) Valve Logic
Purge (PRG) Mode
PRGCTL
CTL1
CTL2
PRGCTL
CTL1
CTL2
( + )
Transducer
Figure C.14 - Calibrate (CAL) Mode
Absolute (including Abs.Dual Range) Valve Logic
Calibrate (CAL) Mode
!
( + )
Transducer
Figure C.16 - Isolate (ISO) Mode
Absolute (including Abs.Dual Range) Valve Logic
Isolate (ISO) Mode
Note: In isolate only mode, the current pressure between the CTL1 valve
and the Transducer ( + ) will be trapped. Changes in temperature or eleva-
tion can increase or decrease this pressure which may cause overpressure.
97
97
Appendix
PRGCTL
CTL1
CTL2
PRGCTL
CTL1
CTL2