DURAG D-R 290, Руководство по эксплуатации

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8 | Maintenance
160 D-R 290
Example 1 (linearity test without scaling)
1. The linearity measurement is started and a test filter with an opacity of approx.
15.4% is inserted.
2. The scaling is set to 0.
3. The measured values of the device are assigned as shown in Fig. 8.5 to:
∙ Channel 1 Optical density (double path) 0.145
∙ Channel 2 Opacity (PLCF = 1) 15.4%
∙ Channel 3 Opacity SP 15.4%
∙ Channel 4 Measured dust value (factor a=0, b =
200)
29.1 mg/m 3
∙ Directly measured value: 15.4% OP SP
Fig. 8.5: Example of a linearity test without scaling
Example 2 (linearity test with scaling)
The linearity measurement is started and a test filter with an opacity of approx. 15.4%
is inserted.
The scaling is set to 1.
The channels are set to the following signal ranges (see also section
7.5.3.5 Signal
range [
}
133] and 7.5.2.1 Available type codes for the D-R 290 [
}
128] ):
∙ Channel 1 Optical density (double path) 0 to 2
∙ Channel 2 Opacity (PLCF = 1) 0 to 20 % OP
∙ Channel 3 Opacity SP 0 to 100 % OP SP
∙ Channel 4 Measured dust value 0 to 200 mg/m 3
The measured values of the device are assigned as shown in Fig. 8.6 to:
∙ Channel 1 Optical density (double path) 0.309 (~15.4% of 2)
∙ Channel 2 Opacity (PLCF = 1) 3.1 (~15.4% of 20)
∙ Channel 3 Opacity SP 15.4 (~15.4% of 100)
∙ Channel 4 Measured dust value 30.9 (~15.4% of 200)
∙ Directly measured value: 15.4% OP SP