With our manifold setup, will the digital display always show values that are offset from zero (like the analog meter), and never the actual dimensional value? If so, is this a function of multiple probes being manifolded to a single channel comparator, or does matched set probes have any bearing on this?

When using a manifold with multiple probes measuring multiple dimensions, we are restricted to readings of deviations from zero. Yes, this is a function of multiple probes being manifolded to a single channel comparator. Actual size readings are programmable only for single dimension measurements.

Can you give me a brief written explanation of how we would master the 5-6 probes that are manifolded to an SR1? I believe you said we could master one probe and would not need to re-master the other probes, when we switch from one probe to another. And: What level of precision are the probes matched to each other? Can that be put in writing on the quote?

All SR1 tooling is calibrated on the SR1 system to a known “master zero”. Each probe in a matched set is calibrated to read +/- .000025″ of that master zero, when mastered with its respective ring gage. Therefore, when one tool is mastered, or “zeroed”, switching to another in the matched set though the manifold, will maintain that zero within the specified +/-.000025″ tolerance. i.e., if you apply the second probe’s master, the reading will fall within the zero tolerance.

What is the difference between a standard blind and super blind air probe?

The difference between blind and super blind is the distance the jets are placed from the end of the probe. Since this is a D2500 probe, standard blind has the centerline of the jets .156 back from the end and would basically get a reading in the middle of a .300 land. Super blind has the centerline placed .090 back and will read 2/3 of the .300 land.

How can I tell if my probes or air rings are still good?

A simple balance test will show if your gaging is operating properly. With your probe attached to your amplifier, the jets positioned horizontally at 9:00 & 3:00, and your spread set, place the zero ring (or high limit ring if it is a 2 ring mastered gage) on the probe. Press the ring against the left jet and note any change in the reading. Then press the ring against the right jet and note any change. Any movement exceeding .000020 per side indicates an imbalance that will affect accuracy and repeatability.