Hach DOC026.52.00769, Руководство пользователя

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17
Installation
3.3 Mechanical installation
3.3.1 Environmental requirements
The SS7 sc and SS7 sc-HST enclosures are designed for
general-duty, indoor installation. Ambient temperatures within
specifications are allowed, but best performance will result if
temperature does not change rapidly. Do not mount in direct
sunlight. Shield from dripping water.
The controller enclosure is designed to protect the electronics from
typical conditions in water treatment and industrial facilities.
3.3.2 Selecting the installation location
Turbidimeters should always be located as close to the sampling
point as possible. The shorter the distance traveled by the sample
to the turbidimeter, the faster the turbidimeter can respond and
indicate changes in sample turbidity.
Dimensions and other installation information are shown in Figure 8
on page 18 , Figure 9 on page 19 and Figure 10 on page 20 . The
control and sample unit are designed for wall mounting. The
turbidimeter sensor must be mounted within six feet of the
controller unless an extension cable is used. Maximum cable length
is 9.6 m (31.5 ft).
3.3.3 Mounting the SS7 sc or SS7 sc-HST
1. To ensure proper performance, the sample unit must be level
(
Figure 9 on page 19 ). Use a small level across the top opening
of the turbidimeter body to verify that the instrument does not
slope left-to-right or front-to-back.
2. Use one rubber washer (supplied) at each wall mounting block
between the block and the wall. Mounting blocks are secured to
the four corners of the sample unit to facilitate wall mounting
without affecting the integrity of the enclosure protection.
3. Attach the sample unit to the wall with four customer-supplied
mounting bolts.