Yokogawa Advanced Reflux Sampler - Manual (Page 17)

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All Rights Reserved. Copyright © 2011, Yokogawa Electric Corporation. Subject to change without notice. April 2011 IM 11A00V01-01E-A
10.4 Installation and Maintenance Instructions for
Temperature Control Valve Systems
10.4.1 Safety Information
This product is designed and constructed to withstand the force encountered in normal use. Use of the product for any
purpose other than as a temperature controller could cause Injury or fatality to personnel.
NOTE
This product contains Kerosene which is highly inflammable.
10.4.2 Installation
Check that the control system supplied is of the temperature range required. It is important that the whole of the
temperature sensing area of the sensor is fully immersed in the fluid being controlled, see Fig. 1.
WARNING
The sensor must not be subjected to mercury or ammonium salts.
The sensors can be held in a screwed nipple by means of a compression ring. Screw the nipple into the boss provided on
the plant, thread the union nut and compression ring over the sensor. Insert the sensor fully into the nipple and tighten up
the nut and compression ring. Do not over tighten. Where the sensors are used in conjunction with a pocket, either to allow
easy withdrawal or as a protection against corrosion, the separate screwed nipple is dispensed with and the union nut and
compression ring attached directly to the top of the pocket. Therefore insert the pocket in place of the screwed nipple.
When using a special long pocket with the SA122 or SA123 sensor, the screwed nipple, compression ring and nut are
dispensed with and a rubber sealing bung provided, which is fitted over the capillary and slid into place to secure the sensor
into the pocket. Screw the pocket into place, and then feed the sensor bulb to the bottom of the pocket, using the rubber
bung to seal the top.
When using a pocket it is advisable to fill the gap between the pocket and the sensor with a heat conducting medium such
as oil, but when using a special fang pocket in conjunction with the SA122 or SA123 sensors it should not be filled above
the top of the sensor. The adjustment mechanism should not be subjected to an ambient temperature above 50°C (122°F).
The capillary tube between the sensor and the valve must be run and supported in such a way that it wilt not become
damaged. Avoid all sharp bends.