KERTEST is the module to provide all the information required to do a good electric test
KERTEST use the Profile testThe profile test defines all the rules use in a company to test a board.
The profiles are saved with all associated parameter. The rules are:
- Select the tester type (Flying tester or fixture)
- Select face side (top, bottom, both)
- Use of solder mask (from Gerber or CAD)
- Define probe to probe distance
- Define keep out area (package body, package lead, package outline…)
KERTEST use the placement priority.This defines the probe location outside the keep out area.
The maximum level of priority is 100 and the minimum is 0. Between this limits the choices are:
- Choice of the side
- Choice depending of
- Class( Resistor…)
- Reference Designator
- Part number
- Via diameter
KERTEST detect power signalsIt is important to detect all the power to assign a number of test points depending of the quantity and also a short test is quite important
A search tool does it for you. The result of the detection gives to you the number of the possible location for each power. It is also graphically displayed.
The information is displayed in grid and the user may decide how many probes it will assign. By default all location will be used.
If a large number of probes are required for example for ground, it is possible to define a minimum space between probe
KERTEST uses multiples probe for a netThis is requiring for 4 wires test.
In the same way than priority, the user may assign probe quantity per net.
If he is select reference Designator, it will assign probe at a specific location.
KERTEST uses nail defined in a listThe nail is defined with several parameters
Pitch between nails
Wiring type (wrapping, solder)
Nail head type
KERTEST uses nail impact defined in a listThe probe should get contact with the copper to establish the measure. The impact location could be defined by:
- Centre of pad
- Centre of lead
- Offset from centre
At the end of the process a testability report is generated.
KERTEST create data to build the fixtureTo build a test fixture some type of data are required.
Kertest generate it.
- Dimension of the probe plate
- Dimension of the vacuum seal
- Location of the spacer
- Location of the spring
- Location of the pushrod
- Drilling file in Excellon format
- Wiring list