CF ChatterFix
Preventive Maintenance

Proof Stand Calibration & Interlock Test

A proof stand's gauges, relief devices and abort chain are the safety instrument. They are checked with the article disconnected and the system depressurized. The proof itself is a different procedure, with a permit, and it does not live on this work order.

Interval Monthly
Est. Duration 2.0 hrs
Steps 5
Applies To Launch Vehicle Production

The Procedure

The steps ChatterFix schedules for this PM. Every step is a checkable item on the work order — a technician can speak their way through it without touching a keyboard.

  1. Perform this with the article disconnected and the system depressurized
  2. Confirm gauges, transducers and relief devices are inside their calibration dates
  3. Test abort and emergency stop on the interlock chain
  4. Verify the data logger records a simulated channel
  5. Do not introduce pressure, cryogen or propellant under this work order

Why This PM Exists

A proof stand's gauges, relief devices and abort chain are the safety instrument. They are checked with the article disconnected and the system depressurized. The proof itself is a different procedure, with a permit, and it does not live on this work order.

What Skipping It Looks Like

The stand worked last time, the gauge sticker is a month over, and the abort button is assumed because nobody wants to test it on a day the stand is booked.

Setting the interval

Monthly, and on stand cycles. Overdue calibration or a failed interlock takes the stand out of service. It does not get a workaround.

Equipment This Covers

Common Questions

How often should this PM run?
Monthly. Monthly, and on stand cycles. Overdue calibration or a failed interlock takes the stand out of service. It does not get a workaround.
How long does it take?
Budget about 2.0 hours for a technician working to the standard procedure. ChatterFix uses that estimate for capacity planning, then learns your plant's actual time from completed work orders.
What happens if we skip it?
The stand worked last time, the gauge sticker is a month over, and the abort button is assumed because nobody wants to test it on a day the stand is booked.
Can I use this checklist in ChatterFix?
Yes — this exact procedure ships in the Launch Vehicle Production industry pack. Pick your industry at signup and it is scheduled on the right assets automatically, with no configuration.

Related Procedures

Stop Retyping Your PM Library

This procedure — and every other PM for your industry — is already built into ChatterFix. Pick your industry and it lands on the right equipment, on the right interval, in about three minutes.