
MIP LM 3086 SE/EPA3 manual, rev2
–
16.10.2018
Page 55 / 105
WWW.MIP.FI
Aanitasomittarit.fi
Langatonmittaus.fi
Mikrofonit.fi
Opacitymonitors.fi
MIP Electronics Oy
Palokorvenkatu 2
04250 KERAVA, FINLAND
Business ID: 1627111-2
EU VAT ID: FI16271112
+358 10 3222 631
[email protected]
will not be an exact re-setting of zero, but it will be within reasonable limits, enough to get the instrument to
read and calibrate within the EPA required limits.
The G value is an internal value used for the calibration and calculation of opacity. It may change from time to
time as the unit runs. The operator cannot change it.
As a last comment, I can’t stress enough the importance of both cleaning the receiver optics, and
understanding when it is safe to perform a clear stack. If the optics is not clean, you will be calibrating the
window dirt out when you perform a clear stack, resulting in a false opacity reading. Most drift problems and
opacity and dust monitor problems occur due to dirt on the optics, or a laser tube miss-alignment.
5.4
APPENDIX D: E-PROM REPLACEMENT
5.4.1
E-PROM REPLACEMENT FOR THE MONITOR UNIT
There are only two e-proms in the laser opacity unit, one on the stack, and one in the monitor unit.
When installing the chip, observe electrostatic precautions.
Turn the power off first.
Note the orientation of the chip. The printed text on the chip (not on the paper label) is upside down when
read from the back of the unit. The dot on the corner of the chip faces on the upper front of the display
panel.
1.
Remove the defective chip. An E-Prom puller is the best way to remove the chip. Send all used chips
back to the factory at the Hatfield PA address.
2.
Insert the chip into the board with the correct orientation, making sure that all spokes (aka prongs)
are in their receptacles, and are not bent.
3.
Next you MUST do a clear stack procedure, not a dirty stack. You have to re-establish a clear stack
reference value.
5.4.2
E-PROM REPLACEMENT FOR THE STACK
The removal and insertion of the stack chip is the same.
However, there are a couple of differences in the procedure.
Turn the power off first.
1.
Before removing the old chip, observe the service numbers (if possible) and note the M and R
readings.
2.
Note the orientation of the old chip and then insert the new chip, orienting it correctly.
3.
Turn the power back on, and let the unit warm up for an hour or so.
4.
Observe the M and R numbers again and be sure that they are about the same as before.
5.
If the numbers are different, the higher value of the two should be adjusted down. Typically the M
and R will stay the same if an adjustment is not made.
6.
Perform a clear stack, only if the M and/or R were adjusted, otherwise no clear stack is necessary.