Keysight N4691D - When to Gage Connectors; Recognizing Gage Types; Reading the Connector Gage

4-10 Electronic Calibration Modules Reference Guide
Use, Maintenance, and Care of the Devices
Gaging Connectors
4-
When to Gage Connectors
Gage a connector at the following times:
— Prior to using an ECal module for the first time: record the pin depth
measurement so that it can be compared with future readings. This serves
as a good troubleshooting tool when you suspect damage may have
occurred to the device.
— If either visual inspection or electrical performance suggests that the
connector interface may be out of typical range (due to wear or damage, for
example).
— If a module is used by someone else, or on another system or piece of
equipment.
— Initially after every 100 connections, and after that as often as experience
suggests.
Recognizing Gage Types
A gage is referred to by the sex of the connector it measures. For example, a
male gage measures male connectors and therefore has a corresponding
female connector.
— See Figure 4-3 on page 4-11 for an illustration of a typical gage for
3.5 mm, 2.92mm, 2.4 mm, and 1.85 mm connectors.
— See Figure 4-4 on page 4-12 for an illustration of a typical gage for Type-N
connectors.
— See Figure 4-5 on page 4-13 for an illustration of a typical gage for 7 mm
connectors.
Reading the Connector Gage
The gage dial is divided up into increments of 0.0001 inch (0.0025 mm) and
major divisions of 0.001 inch (0.0025 mm). For Type-N gages, see Figure 4-4
on page 4-12. For each revolution of the large dial, the smaller dial indicates a
change of 0.01 inch (0.025 mm). Use the small dial as the indicator of
multiples of 0.01 inch (0.0025 mm). In most connector measuring applications,
this value will be zero.
When using the 7 mm ECal Kit module, you must remove the 7 mm collet
before gaging the pin depth of the connectors. Refer to “Gaging
Connectors” on page 4-9 for gaging instructions. Use the collet extraction
tool provided in your 7 mm kit to remove the collet.
A 3.5 mm gage set can measure 3.5 mm and 2.92 mm connectors. And, a
2.4 mm gage set can measure 2.4 mm and 1.85 mm connectors.