How are the TR25II and TR50I cable reels connected to our Profitest Master series test devices?

To connect the respective cable reels to our test devices, you need the 2/3-pole PRO-A3 II measuring adapter (Z501O).
This is included with every Profitest Master device.

Proceed as follows:

• Mount the PRO-A3 II measuring adapter on the Profitest Master by plugging the Sone L1 into the input of the cable reel. (The additional probe for N (L3) is not required)
• Connect an alligator clip to the loose end of the cable of the cable drum. (Two alligator clips are supplied with the PRO-A3 II measuring adapter)
• First determine and save the offset value in the device as described in the operating instructions
• The R_LO measurement can now be carried out via the PE test probe (L2) and the L1 probe.