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Instruction Manual
IM-105-4000, Original Issue
August 2005
OPM 4000
6-2
4. Using the fine adjustment (large knob) start by raising the opacity level
above zero, then slowly turn the knob in the opposite direction to just
reach ZERO. If you cannot reach zero, or you cannot come above zero,
see Course Adjustment section of this manual.
5. Place the neutral density slides in the slot provided on the top of the
device just behind the mounting screw. The system should read the
same value written on the label ±2% or better.
Filter Correction
If you have an OPLR (correlation factor) other than 0.5, your slides will read
differently. To calculate what the slide will read with another OPLR use the
following formula:
Where:
OP1 = Standard filter value in %
M2 = OPLR for your instrument
OP2 = Standard filter value at your OPLR in %
Example:
Standard filter value is 23.1%. Find what it will read at OPLR of 1.5.
Filter re-calibration is available from Rosemount Analytical and if not
regulated by EPA regulations in your State to a more frequent schedule we
suggest you re-calibrate once a year at a minimum. If you have filters from
other manufacturers we can calibrate them as well (call for pricing). Filters are
tested per USA Code of Federal Regulations 40CFR60 Appx. B, Performance
Specification 1, Section 7.1.3 Attenuation Calibration.
1
Op1
100
1 *100 = 2OP
M2
0.5
1
23.1
100
1 *100 = 54.5%
1.5
0.5