Leaders in Pipelin
e Survey Systems
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SYSTEM MANUAL Version 6.03i
9
reference number, GPS location, depth of pipeline, strength of signal current, distance
from a previous location reference, and logarithmic attenuation of the signal, in millibels
per metre (mB/m), between the two points. At the beginning of each survey, the computer
will also note automatically the time and date using the internal clock, and this information
will also appear on the subsequent download/printout.
At the end of a survey (or whenever required) the Detector Unit may be plugged into a
standard computer via the USB connector (or RS232 serial interface) and the survey data
can be downloaded and/or printed out in full, using Dynalog’s DCAPP software.
The Detector Unit is powered by either NiMH rechargeable batteries which will normally
provide enough power to run the instrument continuously for over 4 hours, or by Alkaline C
cells, which will provide approximately 12 hours of continuous use. There is, in addition, a
built-in lithium power source to maintain the data stored in the memory when the batteries
have been exhausted. This has an estimated life of ten years.
The surveyor must remember that the C-SCAN System is not immune to electromagnetic
interference but it incorporates a number of features which are designed to keep such
interference to an absolute minimum. Briefly, these features include: the generation of a
pure sine wave so that no complex harmonics are produced, the use of a carefully
selected frequency with virtually no harmonics in common with other frequencies in
general use, the narrow bandwidth of the filters in the Detector Unit and the collection of
300 signal samples over a period of approximately 6 seconds to eliminate transient
interference. The instrument can usually be used in the presence of mains AC and is not
affected by any residual ‘ripple’ in operating DC (rectified) Cathodic Protection systems.
2. Unpacking and Activating the C-Scan 2010 Survey System
2.1. Unpacking
For shipping safety the Detector and Signal Generator are shipped with their battery
isolation switches in the OFF position. For future shipping and long storage periods
ensure that the batteries are isolated.
Unpack the entire system from the soft cases and make sure all the items are present in
accordance with the packing list.
NOTES:
A copy of the packing list can be found in the pocket of the Detector soft case. Report
any obvious damage or any missing items immediately.
Do NOT try to activate damaged equipment.
If everything appears to be present and undamaged proceed to 2.2 below to charge
the Signal Generator and Detector Unit ready for use.
2.2. Charging the Signal Generator
The generator has a built-in re-chargeable lead-acid battery, having a nominal capacity of
17 ampere-hours.
Charging is initiated by attaching the charger power unit to the
Charge
socket on the side
of the Signal Generator and plugging the charger unit into the mains power. Selection of
mains voltage (110-240V, 50/60Hz) is automatic. When powered the charger unit will
show a green light. This light is only a power indicator light and
does not
show charge
status.
The Signal Generator will automatically switch on and enter the charge cycle. Note that
the battery isolator must be ON (not isolated) – if the isolator switch is in the OFF position,
a warning will be shown on the screen and the back-light will flash.
