Curtiss-Wright D51600, Руководство по эксплуатации и калибровке

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PIM 417-O
PITOT-STATIC LEAK TESTER TYPE D51600
Issue 5
November 2009
Page 27
CALIBRATION
1. INTRODUCTION
The PSLT must be calibrated on a two-yearly basis against a Primary Calibration Standard, which is
itself traceable to a National Standard. Following calibration against such a standard, the PSLT may be
classed as a Secondary Standard item of equipment.
Calibration shall be carried out under the following conditions:
A. Temperature:
+ 15°C to +30°C
B. Air Pressure: 860 to 1060 mbar, Abs.
C. Relative Humidity: 20 to 70%
2. EQUIPMENT REQUIRED
The equipment required to carry out calibration is listed in
Table 1
Table 1 Equipment Required
REF. ITEM
1
Primary Calibration Standard - Pressure Controller
capable of generating pressure over the range ± 340
mbar with an accuracy of ±0.01 mbar or better.
2 Power Supply Unit (PSU) for the Pressure Controller.
3
Flexible Push-On Hose - Sized to fit 7 mm outside
diameter coupling.
3. CALIBRATION PROCEDURE
Pressure sensing within the PSLT is carried out by a silicon differential pressure transducer, which
provides a voltage output directly proportional to the measured pressure. The PSLT software has been
designed to recalibrate the transducer automatically with minimal Operator intervention.
To calibrate the PSLT:
A. Connect the PSLT to the Pressure Controller (
Table 1 , Ref. 1), using a push-on type flexible hose
with 7 mm OD fitting at the PSLT connector Table 1 , Ref. 3). Apply power to the Controller from its
dedicated PSU (
Table 1
, Ref. 2) and access the Maintenance Mode by pressing the START key
and holding it down whilst pressing 1the PWR key. The screen displays the caption 'Maintenance
Menu 1 CONTRAST CONTROL'.