The Terminations are installed
in the Back plate of the fixture and are
used to adjust the set height of the probe
while providing the electrical connection
from the probe to the fixture wiring.
The X Probe Socketless Series is available
in two Termination types: wired and wireless.
The following chart gives recommended
hole sizes and pin gauges for AT-7000,
G-10/FR4 or similar materials:
| X39
|
Back
Plate |
.0315/.0325 [0.800/0.826] |
.0315/.0325 [0.800/0.826] |
| Pin
Gage PN |
PG-X39 |
PG-X39 |
| X50
|
Back Plate |
.038/.039
[0.97/0.99] |
.038/.039
[0.97/0.99] |
| Pin Gage
PN |
PG-X50-T
|
PG-X50-T
|
| X75
|
Back
Plate |
.0515/.0525 [1.31/1.33] |
.038/.039 [0.97/0.99] |
| Pin
Gage PN |
PG-X75A-T |
PG-X50-T |
| |
|
All
dimensions are in inches [mm]. |
*See X Probe
Alternate Hole Size Applications Note
for increased pointing accuracy.
![]() TERMINATION
SET HEIGHTS: TX39- The
Wire Jack (X39-TJ-3G and 5G) wired Terminations
and X39-XTDS-10 Wireless Terminations
can be set at set heights between -.040
[-1.02] and .100 [2.54] from the top of
the Back Plate. The Wireless X39-XTDS-04
Termination is designed to be used between
-.040 [-1.02] and .040 [1.02] set heights.
X50/X75- The Wire Wrap (X50-TW-3G,
X50-TW-5G, X75-TWA-5G) Terminations, Wire
Jack (X50-TJ-5G) and Wireless XTDS_-14
Terminations can be set between a .000
[0.00] and a .140 [3.56] set height from
the top of the Back plate. The XTDS_-08
Wireless Termination can be set between
.000 and .080 [2.03] set heights.
The distance from the top
of the Probe plate to the probe tip is
given in the following tables when building
by the Suggested Fixture Layout drawings
(C-X39-FIXTURE, C-X50- FIXTURE and C-X75-
FIXTURE):
| Termination
Set Height |
X39-PRP25
Series |
IT
TerminationInstallation Tool |
| -.040 [-1.02] |
.410 [10.41] |
IT-X39-SET
-.040 |
| .000 [0.00] |
.450[11.43] |
IT-X39-FLUSH |
| .040 [1.02] |
.490 [12.45] |
IT-X39 SET
.040 |
| .100 [2.54] |
.550[13.97] |
IT-X39 SET
.100 |
| Termination
Set Height |
X50-PRP25
Series |
X50-PRP40
and
X50-PRP40-D Series |
IT
TerminationInstallation Tool |
| .000 [0.00]
|
.410 [10.41]
|
.560 [14.22]
|
IT-X50-FLUSH
|
| .080 [2.03]
|
.490 [12.45]
|
.640 [16.26]
|
IT-X50 SET
.080 |
| .140 [3.56]
|
.550 [13.97]
|
.700 [17.78]
|
IT-X50 SET
.140 |
Termination
Set Height |
X75-PRP25
Series |
X75-PRP40
and
X75-PRP40-D Series |
IT
Termination Installation Tool
|
| .000 [0.00]
|
.410 [10.41]
|
.560 [14.22]
|
IT-X75A-FLUSH
|
| .080 [2.03]
|
.490 [12.45]
|
.640 [16.26]
|
IT-X75A SET
.080 |
| .140 [3.56]
|
.550 [13.97]
|
.700 [17.78]
|
IT-X75A SET
.140 |
The X Probe set heights
depend on the set height of the Termination
and the stack-up height of the Probe and
Optional Spacer plates versus the distance
from the top of the Probe plate to the
top of the socket as measured with standard
test probes and sockets. By decreasing
the thickness of the Probe and Optional
Spacer plates and increasing the Termination
set height; the distance from the tip
of the probe to the top of the Probe plate
is increased.
Example: if you currently
use a .250 [6.35] socket set height and
want to use the X Probe system, we first
need to calculate the distance from the
probe plate to the tip of the probe on
the standard fixture. This is found by
adding the socket set height to the distance
from the top of the socket to the tip
of the probe = .250 [6.35] + .330 [8.38]
(100-25 Series) = .580 [14.73]. This number
is then subtracted from the overall length
of the X Probe = 1.410 [28.96] (X75-25
Series) - .580 [14.73] = .830 [21.08].
This number is the distance from the top
of the Termination to the top of the Probe
plate. If the Termination is set flush
(.000), this is also the distance from
the top surface of the Back plate to the
top surface of the Probe plate. If the
Probe plate is .375 [9.53] thick, the
Optional Spacer plate will have to be
.830 [21.08] - .375 [9.53] = .455 [11.56]
when the Termination is set to .000 (See
Applications Note- How to Calculate X
Probe Termination Set Heights).
X39 Note: The probe tube
on the X39 is .040 [1.02] longer than
the probe tubes on the X50 and X75, which
requires that the X39 termination to be
set .040 [1.02] lower than a corresponding
X50 or X75A termination. If X50 and X75A
terminations are set flush, the X39 termination
will have to be set at a -.040 [-1.02]
set height with the appropriate IT tool
(IT-X39-SET -.040) in order for the tips
of all X Series to be on the same plane.
Back
to top
![]() TERMINATION
INSTALLATION STEPS: The
IT-X39, IT-X50 and IT-X75A set tools are
designed to install Terminations into
the Back plate at a specified set height.
Installation is performed with the Back
plate and Optional Spacer plates removed.
These tools can be ordered preset at your
specified set height or unset. Instructions
are included with unset tools that allow
the user to set the tool at a desired
set height.
Following these
instructions will ensure that the Terminations
are installed correctly:
- Insert the Termination into the correctly
gauged mounting hole, tail end first.
The bottom retention bead should be
sitting on top of the Back plate.
- Place the nose of the IT tool over
the Termination's .195 [.495] (X39)
or .025 [0.64] (X50 and X75A) diameter
interconnect pin.
- Tap lightly on the IT tool with a
4-6 ounce hammer until the tool's stop
has contacted the mounting material.
Please Note-
The IT-X39 tool is delicate in nature
and should be handled with care.
Back
to top
![]() TERMINATION
EXTRACTION: Terminations
can be removed with or without the Probe
and Optional Spacer plates installed.
| 1. |
Removing Terminations
and Probes with the Probe and Optional
Spacer Plates REMOVED: |
| |
| |
|
| |
In locations where
access is available, QA's standard
PE100 tool will remove headed
X75 probes. For all headless
X Probes needle nose pliers
or tweezers will be required. |
| |
|
| |
The Termination removal requires
use of the Termination Extraction
tools (ET Tools). These tools
are used when a Termination
has been damaged and must be
replaced. For removal of the
Termination use of our ET-X39,
ET-X50 and ET-X75A tools are
required. |
| |
|
| |
These tools are designed to
remove the Terminations from
the Back plate once the Probe
and Optional Spacer plates have
been removed. Following these
instructions will ensure that
the Back plate will not be damaged: |
| |
|
| |
| - |
Remove all
of the X probes. |
| - |
Remove the Probe plate
and Optional Spacer plate.
|
| - |
These tools are designed
to remove the Terminations
from the Back plate once
the Probe and Optional
Spacer plates have been
removed. Following these
instructions will ensure
that the Back plate will
not be damaged: |
| - |
The ET tool is placed
onto the .195 [.495] (X39)
or .025 [0.64] (X50 and
X75A) diameter interconnect
pin of the Termination
and driven out by tapping
lightly on the tools "striker"
with a 4- 6 ounce [113-170
gram] hammer. |
| |
|
|
| |
With care, the tool will also
remove the Terminations with
broken interconnect pins. The
tool is designed to remove Terminations
in mounting plates up to .625
[15.88] in thickness. To help
prevent the tool from being
damaged it is recommended that
the Termination first be set
to .000 with an IT-X39/X50/X75A
-FLUSH tool (on Terminations
set below .000 this step is
not required). |
|
| |
|
| 2. |
Removing Terminations and
Probes with the Probe and Optional
Spacer Plates INSTALLED: |
| |
| |
|
| |
The ET-X39-EXT,
ET-X50-EXT and ET-X75A-EXT tools
are designed to remove and install
Terminations from the Back plate
with the Probe and Optional
Spacer plates in place. These
tools would typically be used
for field repairs where it is
not practical to remove all
of the probes and disassemble
the Probe and Optional Spacer
plates from the fixture. |
| |
|
| |
The tool is designed to remove
and install Terminations in
Back plates up to .625 [15.88]
in thickness when the fixture
is designed around QA's Suggested
Fixture Layout Drawings. Note:
the Probe and Optional Spacer
plates must be in place in order
to prevent the tool from being
damaged. If these plates are
removed, use the standard ET-X39,
ET-X50 and ET-X75A tools for
Termination removal and the
IT-X39, IT-X50 and IT-X75A tools
for installation. |
| |
|
| |
| - |
Remove the
probe from the Probe plate
with QA's PE tools, tweezers,
or needle nose pliers.
Identify the Termination
from the bottom side of
the Back plate for removal
and move adjacent wires
and components to prepare
the Termination to be
removed. This will help
prevent damage to nearby
contacts while the Termination
is being driven out. |
| - |
Guide the nose of the
tool into the mounting
hole in the Probe plate
until the nose of the
tool contacts the .195
[.495] (X39) or .025 [0.64]
(X50 and X75A) diameter
interconnect pin on the
Termination. Make a small
mark on the shank of the
tool located at the top
of the Probe plate with
a pencil or fine line
marker. This mark will
be used to gage the set
height when installing
the replacement Termination.
|
| - |
The Terminations are
removed by tapping lightly
on the tools "striker"
with a 4-6 ounce [113-170
gram] hammer. |
| |
|
|
| |
Note: The wireless XTDS_-08
and -14 Terminations are used
with both the X50 and X75 Probes.
In cases where an X75 Probe
is connected with an XTDS Termination,
the ET-X50-EXT tool would be
use, not the ET-X75A-EXT tool. |
|
| |
|
Back to
top
![]() REINSTALLING
THE TERMINATION:
- Check the mounting hole to make sure
nothing is obstructing it. The appropriate
ET-EXT tool can be inserted into the
hole to check this.
- Drop the replacement Termination into
the hole, tail first. If the Termination
hangs up in the hole, the ET-EXT tool
can be used to push it to its starting
position on the top of the Back plate.
If the Termination requires more than
a light tap of the hammer to seat on
the Back plate, the mounting holes in
the Probe and Optional Spacer plates
will have to be enlarged to the sizes
listed in the QA X Probe Socketless
Series Drill Sizes Application Note.
- The Terminations are installed by
tapping lightly on the tools "striker"
with a 4-6 ounce [113-170 gram] hammer.
Only install the Termination to the
point where the mark (made previously)
on the tool shank aligns with the top
of the Probe plate. This ensures that
the Termination is at the same set height
as the previously removed Terminations.
- Reinstall the proper X Probe with
appropriate PT tool or other plastic
pusher.
- Reconnect fixture wiring to the tail
of the Termination.
Terminations can also be
installed from the bottom side of the
Back Plate. Once the old Termination is
removed, a new Termination can be installed
from the bottom side of the Back Plate.
This would make it possible to install
a Termination without having to remove
the probes and the Probe and Optional
Spacer plates. A custom tool would have
to be fabricated by the user that would
support the Termination during installation
and provide positioning so that the Termination
could be set at the proper set height.
On high-density fixtures, the congested
wiring on the bottom side of the Back
Plate could make this method very challenging.
![]() PROBE
INSTALLATION: The X
Probe is inserted into the mounting hole
in the Probe and Optional Spacer plates
during installation. (For the recommended
X probe hole sizes please refer to QA
Applications Note #D10050 X Probe Drill
Sizes). X Probe installation is accomplished
by using the standard PT50/39, PT100/75
tools for the X39, X50 and X75 respectively.
(Use of the PT installation tools will
seat even the sharpest point styles without
damaging the tips). Select the proper
PT tool for the actual center spacing
of the probes. |
