DeltaOHM HD31, Руководство по эксплуатации

Страница: 32 / 154

HD31
- 32 -
V1.6
AP471S4
Fig. 4.5.2: AP471S...series probes
AP471 S1, AP471 S2 and AP471 S3 probes are provided with a cylindrical shield sliding longi-
tudinally along a guide rail. The shield has two end of stroke positions which lock it in meas-
urement condition (lowest level) or at rest condition (highest level).
Fig. 4.5.3: description of AP471S1- AP471S2- AP471S3 probes
To reduce the amount of space when it is not used, the AP471 S4 probe is equipped with a
protection cylinder to be screwed onto the probe’s head (see fig. 4.5.2).
The probes of AP471 S… series are factory-calibrated and don’t require user-calibrations.
Before the measurement, set to zero the probe as indicated in paragraph 4.5.6 at page 38.
To perform the measurement, extend the telescopic rod for the necessary length ensuring that
the cable may slide freely and without efforts. Uncover the sensor and insert the probe in the
Flow direction line
Air speed sensor
Compensation sensor
Ambient temperature sensor
Cylindrical shield