VELTRON II
Air Monitor Corporation
116-011-98.P65 (8/30/10)
VELTRON II - IO&M Manual
12
5.3 – NORMAL OPERATION
Under
Normal
operation the VELTRON II's display will continuously indicate current process variables (and other
parameters with enhanced display option).
AUTO-zero
At periodical intervals* (see Factory Set-Up Information Sheet provided with the unit) the AUTO-zero cycle will be
initiated. When this occurs, the display will be frozen and all outputs will remain constant. During this cycle the
"AUTO-zero in Progress" LED will be lit.
This cycle will not occur if AUTO-zero has been turned OFF in configuration programming (see Section 5.10).
The AUTO-zero cycle can be manually activated by user (if ON in configuration programming) by simultaneously
pressing
ESC
and
UP
, then scrolling until Perform Auto-Zero is displayed, then press
ENT.
If "AUTO-zero In Progress" LED remains on continuously (past the normal cycle time) or flashes rapidly, refer to
Section 8 - Troubleshooting for required action.
AUTO-purge
If the AUTO-purge option has been installed at the factory (see Factory Set-Up Information Sheet provided with the unit),
it will activate at periodic intervals*. When activated, display will be frozen and all outputs will remain constant. During
this cycle, the "AUTO-purge In Progress" LED will remain lit. Length of cycle depends on purge duration and after-
purge duration (see Factory Set-Up Information Sheet).
This cycle will not occur if AUTO-purge has been turned OFF in configuration programming (see Section 5.11).
The AUTO-purge cycle can be manually activated by user (if ON in configuration programming) by simultaneously
pressing
ESC
and
UP
, then scrolling until Perform Auto-Purge is displayed, then press
ENT.
Alarms
Alarms are available with either the Alarm Option or % Deviation (Alarm 1 only) in the Special Function Option, but not
both.
If either option has been installed at the factory (see Factory Set-Up Information Sheet) and process conditions exist to
activate the alarm, the "Auxiliary Alarm On" LED will light and corresponding alarm relay will be energized (after set
delay time).
*Note: The interval clock for AUTO-zero and AUTO-purge cycles is initiated when the VELTRON II's power switch is
turned on. The time intervals preset in Operator Setup menu will then start their timing sequence.
To reset the interval clock, turn power off for a minimum of 10 seconds, then turn power back on. Interval clock
will then initiate at time zero.
Changing the interval selection in Operator Setup does not reset time clock.
SECTION 5 – OPERATION
Summary of Contents for VELTRON II
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