
MIP LM 3086 SE/EPA3 manual, rev2
–
16.10.2018
Page 29 / 105
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This is zero is required for any part replacement that involves the optical path length, or electronics used in
the calculation of opacity. The only other exceptions are the two boards that supply and regulate power. The
reason this is so critical, is that the controller unit stores a constant in memory that is a function of all of the
optical surfaces. If one of the optical surfaces changes, the alignment and manufacturing imperfections will
deflect the light at a different angle.
2.2.6.3
Password Protection
There are four functions that are password protected to limit non-qualified personnel from changing any of
the sensitive parameters in the monitor. It is very critical to understand the application of each function
before entering the password and changing the set-up parameters. The numbers of the passwords
correspond to the keys on the front of the monitor unit. Numbering is as follows:
Button Number
Passwords:
Zero Mode
= 1
This is Zero
= 3723
Span
= 2
Dirty Stack Zero = 1111
Window
= 3
Span Filter
= 2222
Alarm
= 4
SEC
= 3723
Status
= 5
Up
= 6
Down
= 7
Nxt
= 8
2.2.6.4
PC-Download Mode
This mode gives the operator a means to save internal data in the controller to an external computer via the
9-pin RS 232 pin. The computer should have a program able to receive ASCII files. Hyper-terminal or other
terminal emulator programs will work.
Baud rate should be 1200, bits 8, stop bits 1, no parity, no hardware or Xon/Xoff required. The PC interface
will only work with version 3.31 controller chip and up.
The internal data banks:
•
Averages
–
Last 128 averages
•
Last Zeros
–
Last 32 zeros
•
Last Cal
–
Last 32 span values
•
Last Windows
–
Last 32 window checks
•
Last SEC’s –
Last 32 Stack Exit Correction values
•
Audit
–
Last audits in sequential order with date/time stamp. A new audit replaces the old data.
•
System Log
–
Date/time of last SEC change, audit, new zero, stack power on, stack power off, monitor
on, monitor off, air purge on, air purge off.
To dump data to the computer, push the upper arrow key. The down arrow key will exit to the next mode
paragraph 2.2.6.13 describes the data stream and how to select different outputs.