Table Of Contents; Flow/Pressure Control Components - HP 5890 SERIES II Service Manual

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.
FLOW/PRESSURE CONTROL COMPONENTS
PCOC EPC/MPC Troubleshooting
Remove/Replace Inlet Flow Control Components
Remove/Replace Split/Splitless Capillary Inlet Solenoid Valve
Remove/Replace Electronic Pressure Control (EPC) Components
Remove/Replace Manual Pressure Control (MPC) Components
Remove/Replace EPC/MPC Pressure Control PCB
Typical Switch Settings for EPC/MPC PCBs
Replace Electronic Flow Sensor Module
Electronic Flow Sensor (EFS) Calibration
Setting the ZERO Calibration Value
Setting the GAIN Calibration Value
Entering Specific ZERO and GAIN Values
Replacing/Repairing a Flow Manifold Block
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TABLE OF CONTENTS

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SVC 3- 1
Section 3
SVC 3- 1
SVC 3- 2
SVC 3- 5
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SVC 3- 17
SVC 3- 18
SVC 3- 19
SVC 3- 22
SVC 3- 22
SVC 3- 23
SVC 3- 24
SVC 3- 2 5