Specifications

NEW!

TRANSDUCERS

1418

NEW!

TRANSDUCERS

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March 2014

Installation

Mount the UCP-242 inside a NEMA 1 control panel in a clean, dry environment. Barbed ﬁttings are provided for terminating 1/4"

(0.64 cm) plastic tubing. The UCP-242 must be mounted in an upright position (refer to arrows on unit). For best results, the

transducer should be mounted within ﬁve degrees of upright position. Wire terminations are marked for 4-20 mA operation.

Wiring

Make all electrical connections in accordance with job wiring diagrams and in compliance with local and national electrical codes.

Wiring terminations are made on screw terminals labeled SIG + and COM.

Checkout

Verify with a meter that a 4-20 mA DC signal is present and that polarity is correct. Verify that 20 psig (137.9 kPa)

main air is present. Be sure the UCP-242 is mounted in an upright position.

To check transducer operation:

1. Adjust the input signal to 20 mA. Branch pressure should be 15 psig (103.4 kPa).

2. Adjust the input signal to 4 mA. Branch pressure should be 3 psig (20.7 kPa).

Note: This is a rough functional check only. The UCP-242 is a highly accurate device and laboratory quality meters and gauges

are required to properly check calibration.

CURRENT / PNEUMATIC TRANSDUCER

UCP-242

INSTALLATION

ORDERING INFORMATION

MODEL DESCRIPTION

UCP-242 Current/pneumatic transducer, 4-20 mA input, 3-15 psig (21-103 kPa) output

CAUTION: The Model UCP-242 utilizes parts that can be damaged by supply air containing synthetic compressor

oil vapor, acid fumes, or other corrosive vapors. Synthetic compressor oils must not be used. Standard control air

ﬁltering practices should be observed:

• Supply air must be dried, oil-separated, and ﬁltered using a refrigerated air dryer, a particulate ﬁlter, and a

coalescing type ﬁlter.

• The system must be properly maintained such that all particles larger than 0.03 microns are ﬁltered out and that

less than 0.1 ppm oil vapor exists.

• At the compressor, using an absorbent pre-ﬁlter followed by a coalescing oil removal ﬁlter, such as the K-337 or

K-339, is recommended.

• Using an oil-indicating device prior to installing any UCP-242 is also recommended. This device will provide an

indication of the amount of oil being discharged from the air compressor.

• At the UCP-242, installing the inline ﬁlter (Model FILN05 provided with the UCP-242) in the main air line is

recommended.