31
31
measure depth of trace laying and current using the button pos.10. If necessary, adjust
the amplification level using the buttons pos.9 figure 5.1.
Basic mode of the generator operation for the active searching - unceasing generation,
the method of maximum.
- To define the buried utility position the method of minimum can be also used (refer to
p.2.10). Use the button pos.7 figure 5.1 to switch to the mode of minimum.
- For energy efficiency and the long-term generator operation ensuring, without charge,
use the pulse mode. In this mode, when tracing on the method of maximum pulse
generator sending are displayed as periodic pulsations on the LED scale (pos.12 figure 2.1)
and digital indicator of the receiver.
Instability readings are possible in pulsed mode with a frequency of 8928 Hz in three cases:
1)
when use the method of minimum.
2)
when determine the buried utility depth.
3)
when measure the current in buried utility
NOTE
When tracing buried utility, the defining factor is "LED bar graph”, which displays only a
qualitative picture of searching (approximation or removing for routes). The additional digital
indicator displays absolute value of the received signal level in dimensionless units of
measurement. If you receive a pulsed signal, digital display readings respectively pulse.
Therefore, in this case estimate of the absolute signal level should be considered maximum
values at pulsation.
After tracing work disconnect the generator from the buried utility as stated above (p.3.2).
6. Transportation and storage
The packed instruments can be transported by any kind of closed vehicles. When transported by
air the devices shall be located in the heated sealed compartments.
The railway carriages, containers, automobiles cargo bodies used for transportation of the
instruments shall be free from traces of cement, coal, chemicals etc. transportation.
The transportation conditions for the packed instruments:
-
Temperature from -50
°
С to +60
°
С;
-
Relative humidity up to 98% for a temperature of up to +35
°
С;
-
Relative pressure from 84 to 106, 7 kPa;
-
Maximum acceleration of transportation vibration 30 m/sec2 with shocks frequency from
80 to 120 per minute within 1 hour or 15000 shocks with the same acceleration.
The transportation conditions for instruments without package:
-
Ambient air temperature from -30
°
to +60
°
С;
-
Relative humidity up to 98% for a tempe25
°
С;
-
Atmospheric pressure from 84 to 106,7 kPa;
