Delta OHM DO2003, Manual

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AP471 S1 - AP471 S2 - AP471 S3 - AP471 S4
H
OT
W
IRE
P
ROBES FOR THE
M
EASUREMENT OF
A
IR
S
PEED
E
QUIPPED WITH
SICRAM M
ODULE
AP471S… probes have to be connected to the DO2003 A input. The probes AP471 S1 and AP471
S3 measure air flows up to 40m/s; the AP471 S2 and AP471 S4 probes are fitted with an
omnidirectional sensor allowing measurement of speeds up to 5m/s in any direction of the air flow
incident on the probe. The AP471 S4 probe is fitted with a support base and sensor protection. The
wind speed measurement is compensated for according to temperature within the range of
0…+80°C. The probes AP471S1, AP471 S2, and AP471S3 measure the environment temperature
in the range of -25°C…+80°C; AP471 S4 in the range 0°C…+80°C.
AP471 S1
AP471 S3
Z
ERO
C
OMMAND
AP471 S… modules are factory calibrated and do not require
any calibration by the user.
Before carrying out a measurement, you have to adjust the
“zero” point of the probe. This means that, failing the wind,
speed and flow values provided by the probe, at a temperature
next to that of the airstream to be measured, shall correspond to
zero.
The AP471 S1, S2 and S3 probes are equipped with a
cylindrical shield which is able to lengthwise slide on a rail.
The shield has two positions of limit stroke which stop in the
measurement condition (all downwards) or rest condition (all
upwards). In order to reduce the volume when unused, the
AP471 S4 is equipped with a protection cylinder to screw on
the probe head.
This is the procedure: let the cylindric shield slide upwards till
the complete closing of the speed sensor window placed on the
probe top. For AP471 S4 probe, close the probe head by the
protection cylinder.