Wahl DST500-FM User Manual - page 6
DST500-FM USER MANUAL
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4.2.3 Connect pluggable terminal strip to PCB connector P1.
4.2.4 Install battery with polarity as indicated on battery holder.
4.2.5 Replace cover on Digi-Stem enclosure and secure with four screws
tightened to a force of 4 to 5 in-lbs. of torque.
4.3 Ferrite Installation
The Wahl DST500-FM requires installation of 2 ferrites, installed on the
internal wiring. This is normally installed when the system is delivered,
however on units with extremely long probes these may need to be
installed by the end-user during the installation process.
To install the ferrites, (reference Fig 2) first, mount the large ferrite as shown.
Clamp the small ferrite around the 4 probe wires and the green/yellow ground
wire as close to the ground wire spade terminal as possible. Make certain not to
pinch the probe wires in the ferrite. Route the 4 probe wires through the solid
ferrite and loop back around through the ferrite 2 more times for a total of 3
passes through the ferrite. Connect wires to PCB plug P1 per probe wiring table.
4.4 Grounding
4.4.1 The DST500-FM should be grounded for optimum noise immunity. Install
in compliance to Wahl Control Drawing 13327.
4.4.2 Grounding on DST500-FM’s with rigid probes is accomplished by
grounding the probe shank. Typically, the equipment that the probe shank
is installed in will be grounded, which will also ground the DST500 meter
assembly.
4.4.3 After servicing, be certain the Printed Circuit Board’s ground wire is
connected to the housing’s ground lug.
Fig. 2