Tektronix P6015 - MAINTENANCE; Maintenance Overview; Visual Inspection

MAINTENANCE
introduction
Normally, the P6015 Probe requires very little main-
tenance except for a visual and operational check. This
section is provided as a maintenance guide, and contains
procedures for visual inspection, recharging the probe with
dielectric fluid, and troubleshooting.
Visual Inspection
A thorough visual inspection of the probe should be
performed periodically. Look for such things as loose or
broken connections, damaged plastic insulators, and proper
dielectric fluid level. Except for low fluid level, the remedy
for most of these troubles is apparent.
Check the dielectric fluid level by holding the probe
with the tip down. There should be liquid visible through
the transparent nose. If not, it is essential for you to
determine the'cause of the fluid loss before adding more.
Temperature as well as a leak could affect the liquid level.
See “Recharging the Probe" for details and procedures for
adding fluid.
Use only Fluorocarbon 114 (C¿CL, Fa) dielectric
fluid. Use of other Fluorocarbon fluids may develop
excessive internal pressure,
Recharging the Probe
Fluorocarbon 114 has a saturation pressure of about 2
atmospheres at room temperature. At room temperature, a
small amount of liquid should be visible through the
transparent nose of the probe when the probe tip is pointed
down. Any liquid visible in the nose is an indication of
proper pressure inside the probe. The saturation pressure
increases with an increase in temperature, and at higher
temperatures it is normal for all of the fluorocarbon 114 to
be in a gaseous stage. The liquid, at room temperature,
should be approximately even with or .062 inch above the
‘bottom of the small end of the resistor end cap (see Fig. 3-1).
Section
3—P6015
3-1