Trigger Data hold on Philips Meters sans DataHold Probe?

[watchmaker]

Is there a way to trigger DataHold on meters like the PM 2525 using the Din connector pins and a standard probe?

I have looked at various pinouts for this connector but they all address 4 wire resistance and temp probes.

TIA.

Dewey

[abeyer]

At least some of the models using that connector have service manuals with schematics available with the full connection details.

IIRC, pins 5-6 are an I2C bus and the data hold probe is active, sending messages on that bus which drive a bunch of relays controlling internal signal routing.

[watchmaker]

Thank you.  I will look at the SMs of some of the other meters that use that probe.  I do have two other meters that hold (Flukes) and I would like to add this to the Philips.

Regards,

Dewey