Keysight MX0023A InfiniiMax RC User Manual page 112

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N5425B InfiniiMax Differential ZIF Probe Head
Figure 54 ZIF Tip Latch in Closed Position
If you are attaching the ZIF tip to the probe head when soldering the tip to DUT,
you may need to support the body of the ZIF tip while closing its latch. Use
tweezers or other suitable tool to grab the tip's pc board while the latch is being
closed. If the circuit is live, use plastic or non-conductive tweezers.
Step 3 - Solder the N5426A ZIF Tip to the DUT
Soldering a ZIF tip into a DUT is straightforward, but some of the traditional
soldering techniques that are typically used on larger components will not work
well here. The following is an overview of the recommended soldering techniques.
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Add some solder to the DUT connection points. There should be enough solder
to provide a good fillet around the ZIF tip's leads, but not so much as to create
a big solder ball. A fine MetCal (or equivalent) soldering tip should be used
along with some 11 or 15 mil solder.
Using a rosin flux pen, coat the solder points with flux. The flux core solder does
not provide enough flux for this small scale soldering. Also, put flux on the tips
of the leads of the ZIF tip.
Clean the soldering tip well, then add a little bit of solder to the tip. It may take
several tries to get just a little bit of solder right at or near the tip of the
soldering iron. The solder on the tip keeps the soldering iron tip from pulling
solder off the DUT connection points. This step may be optional if there is
already enough solder on the DUT connection points.
Position a lead of the ZIF tip on top of one of the target points, then briefly
touch the soldering iron tip to the joint. The thermal mass of this joint is very
small, so you don't need to dwell on the joint for very long. The flux that was
added to the joint should produce a good, clean solder joint. If you do not get a
good, shinny, strong solder joint, then there was either not enough flux or the
joint was heated too long and the flux boiled off.
There is a possibility that if a lead of the ZIF tip is inserted into a large ball of
solder that is heated excessively with a soldering iron, the solder joint holding
the lead onto the ZIF tip pc board could flow and the lead would come off
ZIF tip latch in
Closed position
InfiniiMax RC Probe Amplifier and Probe Heads User's Guide