Calibration Of Reservoir Gauges - PRESTON PRESSURE PS-500 User And Maintenance Manual

Pitot-static/air data tester

Hide thumbs

Table Of Contents

Table of Contents

10.

After the calibration point has been entered, the display will briefly read

"Calibration Saved" and then exit the calibration mode.

11. When a satisfactory calibration is obtained at this test point, go through each test

point in the following chart and enter the corrected value at each point. (The correction

chart may be photocopied, cut out, and fixed to the test box for handy reference.)

12. Make a written note of the calibration correction value. In the very rare case that a

calibration factor is lost from the memory, it can be re-programmed without a complete

calibration procedure. The correction value can also serve as a record to see if the sensors

are drifting with age.

Maximum allowable error at any airspeed is 2 Knots. (Generally, a maximum error of 1

Knot should be expected.) The airspeed has only one calibration point.

PS-500 S/N

FOR TEST

DISPLAY

FOR TEST

AIRSPEED

20 Kts

275 Kts

40 Kts

300 Kts

60 Kts

325 Kts

80 Kts

350 Kts

100 Kts

375 Kts

120 Kts

400 Kts

140 Kts

425 Kts

160 Kts

450 Kts

180 Kts

500 Kts

200 Kts

550 Kts

225 Kts

600 Kts

250 Kts

650 Kts

Calibrated by: ___________ Date: _________

Next Calibration Due Date: _______________

Calibration Notes:

 Do not forget to wait the minimum of 10 minutes before calibrating.

 The calibration procedure can be entered only when the mbar mode is selected.

 Do not forget to check bead colors in the air pressure reservoir/dryer. If they are

pink or clear, it is time to change the unit to avoid a build-up of moisture in the

pressure system. Replacement air dryers can be purchased at many hardware

stores, or on the internet (do a search for "mini desiccant dryer").

The reservoir gauges are for reference only, and do not need calibration. The operator

merely references these gauges as an indication of how much reserve pressure or vacuum

there is in the reservoirs, and as a guide to know when to turn on the pump(s).

DISPLAY

AIRSPEED