Yokogawa RotaMASS 3-Series User Manual

Page 37

4. INSTAllATION

4-9

IM 01R04B04-00E-E 8th edition March 01, 2011 -00

Wiring port handling

(1) When waterproof property is unnecessary
For meters with NPT 1/2´´ threads the wiring port is sealed with a cap (not water-proof) that must be
removed before wiring. For the unused wiring port, please prepare plug by the customer. For explosion
proof, please refer to Chapter 9.

(2) When waterproof property is necessary (Wiring using waterproof glands)

When waterproof property is necessary (Wiring using waterproof glands)

To prevent water or condensation from entering the converter housing, waterproof glands are

recommended. Do not over-tighten the glands or damage to the cables may result. Tightness of the gland
can be checked by confirming that the cable is held firmly in place.

(3) Conduit Wiring

When wiring the conduits, utilize the waterproof gland to prevent water from flowing into wiring connection
port. Place the conduit pipe on an angle as shown in Figure below. Install a drain valve at the low end of
the vertical pipe, and open the valve regularly.

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