Toconvert the FID detector to NPD
detector:
4) The NPD bead plugs into the push terminal block
on theGC directly beneath the detector. The termi–
nals are labelled FlO ignitor because this is where
the
FlO
ignitor is normally connected.
5) Because the NPD bead can only tolerate a maxi–
mum voltage of -4.50 volts, be careful not to set the
FlO
volts setpoint
higher than -4.50. Be especially
careful not to
flip
the FlO ignite switch to the up posi–
tion, as this will apply 10 volts to the NPD bead and
bum
it
out. When an NPDdetector is ordered sepa–
rately from the FlO, the NPDvolts are automatically
limited to
-4.50
volts maximum. But when the FlO
and NPDshare the beadlignitor circuit, the operator
must
be
careful not to apply more voltage than the
bead can tolerate.
