NEW BRUNSWICK SCIENTIFIC BioFlo 4500, Руководство по эксплуатации

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New Brunswick Scientific Co., Inc. User’s Guide
95
The configuration of a control loop for gas mixing is completed by selecting the
output device type as SSR4 and the output device connector ID.
SSR4 is a set of four dedicated solid state relays (SSRs) which must be chosen for
this operation. For the gas mix to work appropriately, the relay pairs must be
connected to the gas solenoid valves. The correct order for connecting the
solenoid valves is as follows:
Gas
Solenoid Valve
Output Device
Conn:
S5-Txo-1,8
Output Device Conn:
S5-Txo-9,16
CO
2
1,2 9,10
Nitrogen 3,4 11,12
Oxygen 5,6 13,14
Air 7,8 15,16
SSR Gas
1 CO
2
2 Nitrogen
3 Oxygen
4 Air
The controller causes the valves to pulse open for different fractions of a user-
specified time to obtain different mixing ratios. A constant and continuous flow is
maintained for all mixtures.
13.2 Oxygen Enrichment
13.2.1 Set-Up Summary
Control
Loop
Cascade
Input
Output
Action
Controller
Output Type
Device
Control Type
DO None Direct 0-5 Volts None
Agitation DO - - -
Gas Flow DO - - -
Oxygen DO Direct Gas Mix SSR4
13.2.2 Set-Up Procedure
To set up the existing DO control loop for oxygen enrichment: