HND-P215
page 10
HND-P215 K06/0422
(**) This menu can only be invoked if a referring sensor is connected to connection 1.
When using a second referring sensor at connection 2 then changes are taken over.
Note: When using the logger function some settings in the menu may not be accessible (*).
If these settings should be changed, the logger has to be stopped before, eventually the
logger data has to be cleared. (p.r.t. chapter 7.8)
7.7.1
Different Kinds Of Measuring: „rAtE-Slo, -P.dEt, -FASt“
Three different kinds of measuring pressure are supported. Two of them (P.dEt and
FASt) are working with high measuring frequency of more than 1000 measurings
per second.
7.7.1.1
rAtE-Slo: Standard Measuring
Measuring rate 4 Hz, averaging and filter functions are active.
Application: Measuring of slowly changing or static pressures, e.g. measuring of
leakproofness, athmospheric pressure... Highest accuracy, high noise immunity
(EMI and unstable measuring signals), low power consumption.
7.7.1.2
rAtE-P.dEt: Peak detection
Measuring rate >1000 Hz, the value is displayed unfiltered.
Application with logger function: Measuring of short pressure peaks or fast
changing pressures with a resolution of < 1 ms. The cyclic logger function records
the arithmetic mean value, the highest and the lowest peak of the refering time
interval. Attention: higher power consumption, measuring is sensitive to noise
(EMI,..).
7.7.1.3
rAtE-FASt: Fast filtered measuring
Measuring rate >1000 Hz, the value is filtered slighlty (higher noise immunity than
P.dEt, small peaks will be filtered out), apart from that identical behaviour like P.dEt.
7.7.2
Measuring Of Water Level – Display Unit [m]
When using suitable waterproof pressure sensors the unit [m] for meters of water
can be set in the menu “Unit“. 10 m of water are roughly 1 bar over pressure.
Measurings can be made e.g. like described below:
With one abs. pressure sensor (SL oFF!): Press ‚Tara‘ when sensor is at ambient
air and then bring sensor to the depth to be measured. The display shows now
the depth in [m].
With two abs. pressure sensors (SL oFF!): Sensor 2 at ambient air (does not
have to be waterproof), waterproof sensor 1 at water depth to be measured.
Don’t press ‚Tara‘, the depth can already read from the DIF-display and is
compensated for pressure changes in ambient air.
With one rel pressure sensor: bring tube connection for lower press. in contact to
ambient air by means of a tube (no water contact!) and bring the sensor with its
open press. connection for higher pressure to water depth to be measured
(display and is compensated for pressure changes in ambient air).
