Agilent Technologies 7820A Manual page 229

Maintaining Your GC
Install the J-clamp and screws to secure the electrometer to
25
the pallet.
26 Install the bead assembly and restore normal operating
conditions. (See "To Replace the NPD Bead Assembly"
page 219.) (Do not reset the bead counter unless replaced.)
After installing new collector parts, the NPD leakage current
should be lower. (See
on page 230.) If the leakage current is abnormal, check for
proper reassembly of the detector (especially where the
electrometer interconnect contacts the collector assembly)
and for leaks.
27 Reset the EMF counters. See
Operation Manual.
Maintaining the NPD
"To Check the NPD Leakage Current"
To Reset an EMF Counter
11
on
in the
229