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SVC 3- 1
Section 3
FLOW/PRESSURE CONTROL
COMPONENTS
FLOW/PRESSURE CONTROL COMPONENTS
Flow and pressure control components include pressure regulators, pressure gauges, mass flow con-
trollers, capillary solenoid valves, detector flow manifold blocks, and the Electronic Flow Sensor (EFS)
module. There are many options available for the HP 5890 Series II. Maintenance procedures for the
most common items found in the instrument. Procedures are supplied to remove, replace, and/or
clean various subassemblies, based on the current maintenance philosophy, i. e., to allow replacement
of the lowest level components applicable for a particular assembly.
Specific part numbers are not given in this section. For all replacement part numbers, refer to Sections
3 and 4 of the IPB portion of this document (Detector Flow Manifold Assemblies and Injection Port Flow/
Pressure Control Modules, respectively).
This document is not meant to provide instruction for first time installation of any of the options dis-
cussed. Add- on sheets exist for just this purpose, and should be referenced when performing a first
time installation.
TABLE OF CONTENTS
FLOW/PRESSURE CONTROL COMPONENTS SVC 3- 1
. . . . . . . . .
PCOC EPC/MPC Troubleshooting SVC 3- 2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace Inlet Flow Control Components SVC 3- 5
. . . . . . . . . . . . . . . . . . . .
Remove/Replace Split/Splitless Capillary Inlet Solenoid Valve SVC 3- 7
. . . . . . . . .
Remove/Replace Electronic Pressure Control (EPC) Components SVC 3- 11
. . . . .
Remove/Replace Manual Pressure Control (MPC) Components SVC 3- 14
. . . . . . .
Remove/Replace EPC/MPC Pressure Control PCB SVC 3- 17
. . . . . . . . . . . . . . . . . .
Typical Switch Settings for EPC/MPC PCBs SVC 3- 18
. . . . . . . . . . . . . . . . . . . . . . . . .
Replace Electronic Flow Sensor Module SVC 3- 19
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronic Flow Sensor (EFS) Calibration SVC 3- 22
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting the ZERO Calibration Value SVC 3- 22
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting the GAIN Calibration Value SVC 3- 23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Entering Specific ZERO and GAIN Values SVC 3- 24
. . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing/Repairing a Flow Manifold Block SVC 3- 2 5
. . . . . . . . . . . . . . . . . . . . . . . . .
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