To Configure The Npd - Agilent Technologies 7820A Advanced User's Manual

Table 19 Jets for adaptable fittings
Figure 4 ID Jet type
1 Capillary with extended jet
(recommended)
2 Capillary
3 Capillary, high-temperature
4 Packed
70.5 mm
1
61.5 mm
2
61.5 mm
3
63.6 mm
4
Figure 3 Adaptable NPD jets

To configure the NPD

Advanced User Guide
Part number
G1534-80590
19244-80560
19244-80620
18710-20119
1
In addition to the Ignore Ready and Makeup gas type, the NPD
requires the following configuration settings. Scroll to each and
enable/disable using [On/Yes] or [Off/No].
Auto Adjust Bead Recommended On. When On, the automatic
adjust offset process starts when the bead reaches the
temperature setpoint after having been turned off or cooled
below 150 °C. Auto adjust starts after Dry Bead hold time, if
enabled. Auto Adjust Bead uses the adjust offset feature to
protect the bead—especially new beads—by making sure that the
desired offset is obtained with the lowest possible bead voltage.
When Off, the bead voltage will rise as soon as the Dry Bead
time elapses, or as soon as the temperature setpoint is reached
if Dry Bead is off.
Dry Bead Recommended On. When On, the bead temperature
holds at 150 °C for 5 minutes before continuing to the setpoint.
This allows any condensation to evaporate and be swept out of
the detector.
Jet tip id Length
0.29 mm (0.11 inch) 70.5 mm
0.29 mm (0.011 inch) 61.5 mm
0.47 mm (0.018 inch) 61.5 mm
0.46 mm (0.018 inch) 63.6 mm
2 3 4
5
Detectors
91