Installation Torque; Power Sources - SKF On-line System WVT User Manual

Hardware Overview

Installation Torque

Maximum Temperatures
Note that the power available to the sensor from the + pin of the connector is nominal
6 V with built-in power limiting. The Namur sensor is specified to operate down to a
voltage of 5 V. The SKF Multilog WVT senses the change in current from 3 to 1 mA
when a metal target is within the sensitivity range.
Installation Torque
Recommended Torque
Vibration sensor mounting torque
Cable gland cap and base torque – unused
glands replaced with blanking plugs
Antenna connector retaining nut

Power Sources

The SKF Multilog WVT unit can be powered by internal batteries or external power.
When using battery power, batteries are fitted into the holder unit which is held in place
by four thumbscrews. The PWR switch in the top-right corner should be set to BAT
when using batteries. When the switch is in the EXT position, the batteries are isolated.
The unit detects when batteries have been physically removed. It assumes that fresh
batteries have been inserted and resets the internal battery monitor to "full". The
battery monitor is not reset if the switch is moved to the EXT position and back.
Alternatively, the unit can be powered by an external supply in the range of 10 to
30 VDC. Make sure the power source can supply the peak current required. Connect the
supply to the EXT PWR connector in the bottom right corner paying attention to the +ve
and –ve polarity. The unit is reverse polarity protected and therefore cannot be
damaged if the power source is temporarily connected incorrectly. Move the PWR
switch to the EXT position.
When powered by battery, you must disconnect the external power source so the
firmware can correctly identify the power source type.
Power Considerations
The following table compares line powered vs. battery powered SKF Multilog WVT
devices used for specific functions.
2 - 10
2.9 N-m (24 lb.-in.)
4 N-m (35 lb.-in.)
5 N-m (44 lb.-in.)
SKF Multilog On-line System WVT
User Manual