DC Motor Test Accessories

ATF-11 Armature test Fixture

The ATF-11 is used to do Span Surge Tests of DC motor armatures. A span test is done across multiple bars on the commutator.

  • Several surge tests are done, and are compared to the first test.
  • Works with all iTIG II models. Requires an FS-12 Foot Switch for easy operation.
  • The ATF-11 leads connect to the high voltage output leads of the iTIG II surge tester. The voltage measurement is load dependent when using the ATF-11.

FS-12, Foot Switch

  • For starting tests and allowing hands off operation of the iTIG II surge tester.
  • Works with all models.

ABT,  Armature Bar-to-Bar Surge Test Accessory

The ABT is used with the iTIG II for:

  • Surge comparison tests bar-to-bar on armatures.
  • Surge tests of single coils with very low inductance when the desired test voltage cannot be reached using the iTIG II directly and the desired surge test voltage is below 1,400V.

The ABT works with:

  • iTIG II Models B, C and D.
  • It is typically used with 12kV and 15kV iTIG II models.
  • Models with other max outputs can be used, but with a 4kV or 6kV unit the desired bar-to-bar voltage or coil test voltage may not be reached.
  • Max ABT Output: 1,400V
  • It comes with the BBP bar to bar probe in the picture and the FS-12 foot switch.
ASP surge probe set:
The ASP is an optional and alternative probe set for the ABT. It can be used for bar to bar tests and span tests. The voltage measured is load dependent when the ASP is used. For accurate measurements of the test voltage in the load itself, the BBP probe is used.
ASP-22 Surge Probes are used instead of the ATF-11 for surge span tests of armatures and works with all iTIG II and MINI models. The probes connect directly to the iTIG II high voltage output leads and do not have the connector for the ABT.

ARP, Armature Resistance Probe Set:


The ARP, 4-wire Armature Resistance Probes, are mainly used to measure the resistance bar-to-bar on armatures. They can also be used to measure resistance of other things such as equalizers.

The ARP works with the C and D model iTIG II and iTIG II MINI motor testers.

For model C, the Multi-Coil (MC) option is required. This is a standard feature on model D.

Micro Ohm (µΩ) measurements are required in many cases since bar-to-bar measurements often are below 1mΩ.

The models come with the following resistance measurements:

  • Model C: mΩ, µΩ optional and usually required.
  • Model D: µΩ.

The Multi-Coil option includes report software that automatically generates reports with Pass/Fail results for each bar-to-bar measurement in a test set based on the average of all the resistance measurements. The results are presented in a bar graph.

If the armature equalization is uneven (for example 33% or 66% equalized), the armature tester detects the pattern, adjusts accordingly, and calculates Pass/Fail results based on two resistance levels.

The ARP connects to the front panel of the iTIG II.