ETS-Lindgren HI-1710 Microwave Measurement System (Archived) - Manual (Page 24)

HI n 1710 Manual Page — 19
dc voltage to the input of the RF signal circuitry.
The displayed reading should be between 2.44 and
4.88. Readings outside this range indicate a fault in
the HI-2623 probe/preamp.
Using the HI-1710
Allow the instrument to warm up for at least 10 minutes
for specified accuracy and stability.
Set the operating settings according to the test needs.
For normal tests or a good beginning point, use the
default conditions. Zero the instrument before beginning
the test. With the oven operating with a suitable load,
move the probe across the oven surfaces keeping the
probe axis (handle) perpendicular to the potential leak
area.
Note: Check the spacer cone for damage, discoloration,
or contamination. Accuracy may be affected by cone
wear or damage or by contamination by metallic particles
which may become imbedded in the cone. Replace the
cone if necessary. Replace the cone only with a Holaday
Industries replacement cone for continued accuracy.
Refer to section 6.0 (Test and Troubleshooting) for part
numbers.
Hold the probe by the red handle only to avoid potential
interference and keep other parts of the body and the
probe cord away from the immediate vicinity of the probe
head.
The analog Bar Graph display may be used to determine
areas of highest leakage. In the normal ( non-Peak Hold)
mode the Bar Graph display will track the displayed
digital value and respond to the filtered RF signal. When
the instrument is operated in the Peak Hold mode, the Bar
Archived 4/2/10