Integral Process Analytical System Control
SP2 Flow Path and Valve Control (Dilution)

The diagram below shows the flow path through the components installed in an SP2. The table below the diagram lists the SP2 valves and the function each valve performs.

 Note:

When a solenoid valve is off, port NO is open and port NC is closed. When a solenoid valve is on, port NO is closed and port NC is open.

Valve

Function

SP_Solenoid_1 (SV1)
Standard alve

On—directs stock standard to metering valve (for calibration standard preparation)
Off—directs sample to metering valve (for sample dilution)

SP_Solenoid_2 (SV2)
Diluent valve

On—directs diluent to dilution pump
Off—stops flow of diluent

SP_Solenoid_3 (SV3)
Check Standard valve

On—directs check standard to sample valve
Off—directs sample to sample valve

SP_Solenoid_4 (SV4)
Sample valve

On—directs sample or check standard to ST valve
Off—directs sample or check standard to SS valve

SP_Solenoid_5 (SV5)
Sample/Standard valve

On—directs diluted sample or calibration standard to loading pump
Off—directs undiluted sample or check standard to loading pump

SP_Solenoid_6 (SV6)
Dilution Vessel valve

On—directs diluted sample/standard to SS valve
Off—purges dilution vessel to waste

SP_Solenoid_7 (SV7)

not installed

SP_Solenoid_8 (SV8)
Gas valve

On—pressurizes the dilution vessel
Off—vents the dilution vessel

SP_Solenoid_9
Loading pump

On—turns on the loading pump
Off—turns off the loading pump

Note: To control the loading pump, SP_Solenoid_9 must be in Device Control mode. To select Device Control mode, start the Server Configuration program, open the Properties dialog box for the SP, and select the Solenoids tab.

RotaryValve_1
Metering Valve

Position 10–1—delivers diluent and loop contents to dilution vessel

Position 1–2— loads sample or standard into the loop for delivery to dilution vessel

Also, refer to

 Integral Process Analytical System Control

 SP Sample Preparation Options