Cylinder Differential Tester

[Notatestpilot]

Does the tester require or should be tested on an annual or biennial basis?
I've had this tester for decades, and there's a sticker with a calibration date on it. I'm thinking that was from the factory though.
Any ideas?
Who or where do I send it to for calibration?

 

[Bell206]

Does the tester require or should be tested on an annual or biennial basis?

Technically, it should be checked per the OEMs calibration guidance, but a number of people at the Part 91 level don’t. Some people simply dead-end leak check it to make sure both gauges read the same before each test.

Who or where do I send it to for calibration?

Most tester OEMs offer calibration services which will verify both gauges and verify the flow at the restrictor orifice between the gauges and at the master orifice if it has one installed.

 

[Let'sgoflying!]

If yours is not their brand who knows maybe they will test it?

(Push through any warnings about the website being unsafe)

https://rj.aircraft-tool.com/Detail?id=2E-WARRANTY

 

[Magman]

At one Repair Station we had a calibrated “ Master Gage” and a manifold to allow us to cal all compression tester gages and tire pressure gages. This allowed us to recal when items were dropped.

We also obtained NIST weights to cal tensiometers.

The folks that calibrated the torque wrenches provided weights.

Your FSDO may feel otherwise.

I have been concerned about partial obstructions of the orifice. Keeping the inlet capped when not in use is my routine.

A Snap- on Torque Wrench Calibrator can be very useful when using various adapters such as torquing some props.