vitaldrive IFL-1210, Руководство пользователя

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receiver is automatically switched to the mode of maximum figure 2.9, the error message (Err 4)
is issued in this case.
2.8
Increase/reduction of sensitivity
The receiver sensitivity is modified by depression of the
amplification selection button pos.9. It influences only the
upper scale in the mode of maximum. The first depression
reveals the current amplification (figure 2.10
– amplification
level 12). The subsequent depressions increase /reduce
amplification (from 0 to 19). If the signal is low, the scale works
in the left part and signal change is resolved badly, the increase
of amplification is reasonable. If the scale works mostly in its
right part and periodically “hits the boundary”, the
amplification needs to be reduced. The amplification must be
reduced irrespectively from the scale readings if the receiver
indicates overload figure 2.11.
The depression and keeping for some time of the amplification
buttons pos.9 activates the amplification auto selection button.
The receiver measures the input signals for several seconds and
selects the optimum amplification itself. The procedure status
is indicated on the scale in the bottom part of the screen figure
2.12. The selected amplification is also indicated on the screen.
The automatic selection of amplification is started
automatically when the receiver turning on, operation
frequency changing and in some other cases.
2.1
Error messages
The measurement conditions do not always allow correct
measurement conduction. Some of these cases are as follows:
1. The measured signal is too weak and distorted heavily by
side interferences.
2. There are other buried utilities located near
measurement points which provide the parasite signal.
3. The monitored buried utilities has turn, branch, valve,
cartridge etc. near measurement point.
4. The monitored buried utilities go upwards or
downwards at the measurement point at a significant
angle.
5. The measurements are carried out close to the
connection point of the generator or the cathode
protection system.
Fig.2.10
9
Fig.2.11
Fig.2.12
Fig.2.13