Prostat PRF-922B, User Manual

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12
Rev. 2 / 3-18-2019
PRF-922B Miniature Two-Point Probe Set
Device Tray in Feeder Equipment: This measurement con fi rms con nuity from the tray to ground
through several elements
• Paint on tray contact surface
• Support
shelf
• Shelf support and control linkage
• Shelf linkage to machine frame support
• Machine frame to ground
Device Transport Cart: This Rtg measurement combines equipment components with the environ-
ments
fl oor surface, including:
• Cart shelf surface
• Cart
frame
• Cart wheels
• Floor surface to ground
Assembly Fixture at Worksta on: Rtg measurement from the fi xture may include several elements,
depending on how it is installed, such as:
• The
fi xture’s device holding assembly
• Fixture frame
• Worksta on surface suppor ng the fi xture
• Worksta on surface to the worksta on’s frame
• Worksta on frame to ground
The photo in Figure 8 is an Rtg measurement of a tray on a worksurface mat. In this con fi gura on the
resistance measurement includes the tray, the mat, the mat connec ons and wiring to ground. No ce that
the posi ve test lead is separately connected to ground.
VII. Handling & Maintenance
A. PRF-922B Miniature Two-Point Probe Fixture
1. Store the PRF-922B in a clean, dry environment with both BNC and Probe covers installed for
environmental and mechanical protec on.
2. Periodically, remove all spring-loaded test pins. Clean the spring-loaded test probes and Te fl on
moun ng disk with a solu on of laboratory grade isopropyl alcohol and a lint-less cloth, or
laboratory quality swab. Allow components to dry thoroughly be fore re-assembling.
a. Remove each test probe individually by grasping it fi rmly then
pulling it straight out of its socket.
b. Inspect each probe for damage, then clean with the
alcohol solu on. If a probe is damaged, i.e., bent, does not
compress smoothly, or has deep surface scratches, replace it
with a new probe of the same size and characteris cs.
(Contact Prostat Corpora on, Customer Service for spare
replace ment probes.)
c. Clean and dry the Te fl on moun ng disk twice to insure
cleanliness
d. Carefully re-install the spring-loaded test probes, and fully
re-seat them in their sockets
Figure 11: Remove Spring-Loaded
probe electrode by grasping
fi rmly
and pulling straight out of its
socket.
Pull straight out