Instruction Manual
IM-105-4000, Rev 1.3
October 2008
OPM 4000
5-4
Coarse Adjustments
Opacity Below Zero
If the opacity reading is below zero and you can not reach zero after you have
turned the adjustment knob as far as it will go into the zero jig housing,
perform the following procedure:
1. Hold the zero jig in your hand so you can see the iris and retro reflector.
Turn the fine adjustment knob so that the iris is closed as far as it will go.
2. Loosen the coarse adjustment set screw.
3. Turn the fine adjustment knob in the opposite direction as far as it will
go.
4. Tighten the coarse adjustment set screw. Be sure not to tighten more
than 1/16 of a turn to prevent damage to the iris ring.
5. After the setscrew is tight again try to reach zero. Repeat if necessary.
Opacity Above Zero
If the opacity reading is above zero and you can not bring it up after you have
turned the adjustment knob as far as it will go into the zero jig housing,
perform the following procedure:
1. Hold the zero jig in your hand so you can see the iris and retro reflector.
Turn the adjustment knob so that the iris is open as far as it will go.
2. Loosen the coarse adjustment set screw.
3. Turn the fine adjustment knob in the opposite direction as far as it will
go.
4. Tighten the coarse adjustment set screw. Be sure not to tighten more
than 1/16 of a turn to prevent damage to the iris ring.
5. After the setscrew is tight, again try to reach zero. Repeat if necessary.
6. After performing all of the above steps, if you can not reach zero, or zero
is unstable, contact the factory for assistance.
Filter Correction
If you have an OPLR (correlation factor) other than 0.5, your neatral density
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
Do not force the knob. Stop at the first sign of binding.
Do not force the knob. Stop at the first sign of binding
.
1
Op
1
100
1
*100 =
2
OP
M
2
0.5
Summary of Contents for Rosemount Analytical OPM 4000
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Page 10: ...Instruction Manual IM 105 4000 Rev 1 3 October 2008 OPM 4000 TOC 4 ...
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Page 52: ...Instruction Manual IM 105 4000 Rev 1 3 October 2008 OPM 4000 4 6 ...
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Page 100: ...Instruction Manual IM 105 4000 Rev 1 3 October 2008 OPM 4000 A 24 ...
Page 102: ...Instruction Manual IM 105 4000 Rev 1 3 October 2008 OPM 4000 B 2 ...
Page 104: ...Instruction Manual IM 105 4000 Rev 1 3 October 2008 OPM 4000 C 2 ...
Page 114: ...Instruction Manual IM 105 4000 Rev 1 3 October 2008 OPM 4000 D 10 ...
Page 116: ...Instruction Manual IM 105 4000 Rev 1 3 October 2008 Index 2 OPM 4000 ...