Emerson 399VP, Combination pH/ORP Sensor instruction manual Section Wiring, Scl

MODEL 399VP pH/ORP SENSOR	SECTION 3.0
	WIRING

SECTION 3.0.

WIRING

Figures 3-2 thru 3-23 provide the diagrams for wiring the 399VP sensor to various analyzer/transmitters.

1.If the cable needs to be extended, use a high quali- ty cable available from Rosemount Analytical. Refer to Figures 3-2 through 3-23 for the appropriate junc- tion box part number and the corresponding wiring details.

NOTE

If the extension cable is too long, either loop up the excess cable or cut and terminate each conductor neatly. Make sure that the overall (outermost) drain wire is not shorted out with either of the two inner drain wires (shields).

2.Signal cable should be run in a dedicated conduit (preferably an earth grounded metallic conduit) and should be kept away from AC power lines.

NOTE

When extending the mV signal from the sensor through a remote junction box to the analyzer, the outer braid of the extension cable to the instrument must be terminated at earth ground or by using an appropriate metal cable gland fitting that provides a secure connection to the instrument cable.

The Model 399VP is used with a Variopol coax cable. The cable should be handled carefully and kept dry and free of corrosive chemicals at all times. Extreme care should be used to prevent it from being twisted, dam- aged or scraped by rough, sharp edges or surfaces.

DANGER

DO NOT CONNECT SENSOR CABLE TO POWER LINES. SERIOUS INJURY MAY RESULT.

TABLE 3-1. Remote Junction Box and Extension Cable Part Numbers

Model	Remote Junction	Extension
	Box PN	Cable PN
54	23555-00	9200273*
81	23555-00	9200273*
1003/1023	23309-03	9200000
1050/1060	23309-03	9200000
1054	23309-04	9200273*
1054A/B	23309-04	9200273*
1055	23555-00	9200273*
1181	23309-03	9200273*
2054	23309-04	9200273*
2081	23309-04	9200273*
3081/4081	23555-00	9200273*
SCL	—	—
2700	—	—

*Note that PN 9200273 is a raw cable. It can also be purchased with wires already prepared (PN 23646-01) for quicker installation.

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