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The TWW 103 M1 transmitter  is a dedicated onechannel vibration and position measurement transmitter with a 4 to 20 mA current-loop output signal. A TWW 103 M1 transmitter is used, in combination with a WW 018 proximity sensor, to measure the relative position of a target object without touching the target (that is, the non contact measurement of displacement). Accordingly, such displacement measurement systems consist of a WW 018 proximity sensor and a TWW 103 M1 transmitter, and provide a measurement range (static) of 10 mm. The TWW 103 M1 is available in standard versions for use in standard (non-hazardous) areas and Ex versions for installation in hazardous areas (potentially explosive atmospheres).

General operation

Sensor compatibility : WW 0xx proximity sensor with a cable length of 5 m.

Notes: The system length must be specified when ordering.Sensors of the same type with the same cable length are interchangeable.

Measurement range : 10 mm max. with WW 018 proximity sensor.

Note: The measurement range depends on the sensor.

Linearity deviation : ≤2%.

Note: Measured with a reference WW 018-R proximity sensor.

Filter

• Low-pass filter (fu) : 0 Hz

• Low-pass filter (fo) : 5 Hz

• Roll-off (slope) characteristic : 20 dB/decade

Internal supervision : Internal supervision circuitry (transmitter) monitors for interruption or a short-circuit in the proximity sensor or in the cabling. Furthermore, it will also detect when the target object is clearly placed outside of the measurement range.

Fault indication : Zero current (0 mA) signal from the analog output and a red LED indicator (see LED indicators on page 3)

Analog outputs

• 4 to 20 mA : 4 to 20 mA current loop output, corresponding to the processed output measurement (relative position).

Notes: 500 Ω max. load. This signal is the main output from the transmitter intended to be used for machinery monitoring.

• 4 to 20 mA (25 Ω) : 4 to 20 mA current loop output, corresponding to the processed output measurement (relative position).

Notes: 25 Ω max. load. This signal is intended to be used for the positioning of the proximity sensor (during installation).

Notes: Both analog outputs are galvanically isolated. The analog output characteristic is inversely proportional to the input, with 0 to 10 mm corresponding to 20 to 4 mA.

Offset : Inaccuracy in the mechanical installation (positioning) of a WW 0xx proximity sensor can be corrected using the Z potentiometer. The range of compensation corresponds to ±0.5 mm approx.

Power supply Voltage : 24 VDC nominal (18 to 30 VDC).

Note: Galvanically separated.

Current : 100 mA max.