Process Unit 73 LF - Knick
Process Unit 73 LF - Knick
Process Unit 73 LF - Knick
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<strong>Process</strong> <strong>Unit</strong> <strong>73</strong> <strong>LF</strong><br />
Simple Conductivity Measurement<br />
Fig. 9–1, page 9–3 shows how the <strong>Process</strong> <strong>Unit</strong><br />
<strong>73</strong> <strong>LF</strong> is configured for simple conductivity measurement<br />
with automatic temperature detection<br />
and conductivity signal evaluation by a connected<br />
recorder.<br />
You can connect 2-electrode cells or 4-electrode<br />
cells to the <strong>Process</strong> <strong>Unit</strong> <strong>73</strong> <strong>LF</strong>. Cell selection depends<br />
on the measurement range:<br />
<br />
<br />
For measuring low conductivity values, you<br />
should use 2-electrode cells (e.g. Models<br />
SE 604 or ZU 0071, see page 14–12, 14–9)<br />
For measuring high conductivity values, you<br />
should use 4-electrode cells (e.g. Model SE<br />
600, SE 602 or SE 603, see page 14–4)<br />
Especially for 2-electrode cells, the range not<br />
only depends on the cell constant but also on the<br />
electrode surface. For information on selection of<br />
suitable cell constants, refer to ISO 7887 (DIN<br />
38 404.1), for example.<br />
9–2 Capabilities
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