NIVELCO EasyTREK SCD-300 Series, Инструкция по установке и программированию

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P29 Blocking out of object
One object in the tank/silo disturbing measurement can be blocked out.
Enter distance of the object from the transducer. Use the Echo Map (P70) to read out the precise distance of disturbing objects.
FACTORY DEFAULT: 0
P31: Sound velocity at 20
°
C (m/sec or ft/sec depending on P00(c) )
Use this parameter if the sound velocity in the gases above the measured surface differs largely from that of in air.
Recommended for applications where the gas is more or less homogeneous. If it is not, the accuracy of the measurement can be improved using the
32-point linearization (P48, P49).
For sound velocities in various gases see section “Sound Velocities”.
FACTORY DEFAULT: Metric (P00: “EU”): 343.8 m/s, US (P00: “US”): 1128 ft/s
P32: Specific gravity
If you enter value (other than “0”) of specific gravity in this parameter, the weight will be displayed in EView instead of VOL.
FACTORY DEFAULT:
0
[kg/dm
3
] or [lb/ft
3
] depending on P00(c)
P33: (m) Manual echo selection by moving the Measuring Window
A so-called measuring window is formed around the echo signal (See scheme on the next page.)
The distance of the target will be calculated from the flight time in accordance with the position of the
measuring window.
Use this parameter if the EasyTREK unambiguously selects a wrong echo; for example the echo
reflected from the surface is much weaker than the interfering one(s) (see figure beside and on next
page).
Enter the distance of the correct echo and the software will move the measuring window and
calibrate itself to the echo found there.
To determine the distance of the correct echo, either use the Echo Map (to load-in a value from the
Echo Map, see parameter P70), or measure the distance with an appropriate device, and enter this
value in P33.
1.
2.
If this parameter has been used (P33 is not 0), its value will be continuously updated with the valid echo position.
This means, that in case of a power loss, the EasyTREK will restart the signal processing with the measuring window at the last updated
position. To switch-off this function, set P33= 0.
FACTORY DEFAULT: 0