Yokogawa Extractive Oxygen Gas Analyzer TDLS220 - Manual (Page 48)

<6 BASIC OPERATION> 6-18
IM 11Y01B02-01E-A 4th Edition September 11, 2012-00
Note: all three valves can be off at same time.
TIME SEQUENCE
The valves can be controlled automatically based on the time
sequence. As an example of the left setting, Valve 1 stays on
for 60 minutes before switching to Valve 2.
By setting the Time Sequence of all 3 valves, the stream
switching can be implemented continuously and periodically.
REMOTE OVERRIDE
Each valve can also be manually turned on by remote digital
contact from control room or DCS. This panel specifies digital
input channel for valve control.