MASS-tron II/CEM
Air Monitor Corporation
116-004-94.P65 (8-31-10)
MASS-tron II/CEM
- IO&M Manual
13
5.3 – NORMAL OPERATION (con't)
AUTO-purge
. AUTO-purge cycle will be activated at periodic intervals determined by the "smart" relay programming.
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).
AUTO-cal
. Every 24 hours* or when externally activated, the AUTO-cal cycle will be initiated. When this occurs, the
display will be frozen and all outputs will remain constant (Note: Transmitter/AUTO-cal Reporting Output 1 will vary
during the reporting phase of the AUTO-cal cycle. See Section 5.12 for more specific details).
During the AUTO-cal cycle, the MASS-tron II/CEM will first perform an AUTO-zero cycle which creates a zero differential
pressure across the transducer. Any zero signal error is measured and stored.
Upon completion of the AUTO-zero cycle, the MASS-tron II/CEM performs an AUTO-span cycle which creates a
percent (see Factory Set-Up Information Sheet) of full scale differential pressure across the transducer. Any span
signal error is measured and stored.
The remainder of the AUTO-cal cycle consists of: Start Report Delay; Zero Report Duration, In Between Report
Duration; and Span Report Duration – all of which have user selectable durations.
During the AUTO-cal cycle, the "AUTO-cal In Progress" LED will be lit.
The AUTO-cal cycle can be manually activated by user by simultaneously pressing
ESC
and
UP
, then scrolling until
Perform Auto-Calib. is displayed, then press
ENT
.
If the "AUTO-cal In Progress" LED remains lit after completion of the AUTO-cal cycle, the error between the input
reference pressure and the reference value (see Section 5.15) is 3% to 5%. If the LED flashes rapidly, the error is
greater than 5%. Refer to Section 8 – Troubleshooting for the required action.
Additionally, if the "AUTO-zero In Progress" LED remains lit or flashes rapidly after completion of the AUTO-cal cycle
(see AUTO-zero above for meaning) refer to Section 8 – Troubleshooting for the required action.
ALARMS
. If alarm has been turned on in Configuration Programming and process conditions exist to activate the
alarm, the alarm relay will be energized (after set delay time).
*Note
:
The interval clock for AUTO-zero, AUTO-purge, and AUTO-cal cycles is initiated when the MASS-tron II/CEM's power
switch is turned on. The time intervals (preset in Operator Set-Up 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 MASS-tron II/CEM
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