4
the distance. Subtract 1.3 meter from the displayed result for the measuring leads.
Interpretation of the trace information is straightforward. A rising deflection indicates an open
circuit, a high series resistance, or a transition to a cable having higher characteristic imped-
ance. A falling deflection indicates a short circuit, a "Tee" joint (tap) or a transition to a cable
with lower characteristic impedance. Shorts and opens will show full screen deflections whilst
poor connections or slight discontinuities give much smaller deflections. If no deflections are
seen there may be no fault or the fault is beyond the range displayed or beyond the instruments
sensitivity. If it appears there is a fault near to or within the transmitted pulse select the next
lower range. For examples of the traces which may be seen during investigation refer to the
Lexxi T810 user manual on the inside front cover.
The principle of taking measurements with the DET-3000 is the same regardless of the type of
fault you are looking for. On branched systems the measurement will have to be repeated on
each section of the circuit. Therefore splice or marshalling boxes will have to be opened and the
heating cable will have to be disconnected from the terminals in order to be investigated using
the DET-3000.
Cabel type
DET3000
Selfregulating
3BTV2-CT
0,48
5BTV2-CT
0,48
8BTV2-CT
0,41
10BTV2-CT
0,40
4XTV2-CT
0,59
8XTV2-CT
0,56
10XTV2-CT
0,57
12XTV2-CT
0,56
15XTV2-CT
0,58
20XTV2-CT
0,55
10QTV2-CT
0,39
15QTV2-CT
0,39
20QTV2-CT
0,4
5KTV2-CT
0,58
8KTV2-CT
0,55
15KTV2-CT
0,54
20KTV2-CT
0,51
WGRD-FS-A-2X
0,44
WGRD-FS-B-2X
0,43
WGRD-FS-C-2X
0,4
HWAT-L
0,41
HWAT-R
0,41
HWAT-M
0,42
FROSTOP BLACK
0,50
FROSTOP GREEN
0,51
FREEZGARD W51
0,47
FREEZGARD W52
0,49
FREEZGARD W53
0,48
LC2-5LC2-CT
0,51
EM-EM2-R
0,39
EM-EM2-XR
0,40
8STV
0,42
10STV
0,44
Cabel type
DET3000
MI
EMK CuNi 400
0,36
HDF 1M 250
0,38
HDC 1M4
0,48
1H63 0,38
1H2,5 0,42
1H1,5 0,48
1H4 0,43
323/1 0,55
30/38C 0,35
41/200K 0,37
446CC 0,48
HCC 1M11
0,48
MHC 40
0,42
1M4 0,42
MIN-M1-4 0,38
MIN-M1-17 0,39
MIN-M1-63 0,40
7001-0048 0,62
Cabel type
DET3000
Power limiting
5VPL2-CT
0,70
10VPL2-CT
0,68
15VPL2-CT
0,66
20VPL2-CT
0,64
IHT/2/10-CT
0,64
IHT/2/20-CT
0,64
IHT/2/30-CT
0,65
FHT/2/10-CT
0,65
FHT/2/20-CT
0,65
FHT/2/30-CT
0,59
Cabel type
DET3000
Series
LLP-1
0,60
LLP-2
0,61
LLP-3
0,59
LLP-4
0,59
LLP-5
0,59
FCW-T1,8
0,69
ICW-T2,9
0,69
ICW-T7,0
0,70
FCW-T10
0,67
ICW-T10
0,67
FCW-T15
0,67
ICW-T15
0,67
FCW-T17,8
0,68
ICW-T17,8
0,68
FCW-T25
0,68
ICW-T25
0,68
FCW-T50
0,65
ICW-T50
0,65
FCW-T68
0,68
ICW-T68
0,68
FCW-T100
0,69
ICW-T100
0,69
FCW-T200
0,66
ICW-T200
0,66
FCW-T370
0,68
FCW-T500
0,66
ICW-T500
0,66
FCW-T730
0,67
ICW-T730
0,67
FCW-T1000
0,65
ICW-T1000
0,65
EXEC 15 Ohm
EXEC 100 Ohm
EXEC 200 Ohm
PNG 180 Ohm
BKG 180 Ohm
KNG 240 Ohm
Tes-65-FOJ
Cable type
DET3000
Power cable
YMvK 3x2,5
0,57
YMvkK 6x1,5
0,56
7. Table Propagation velocity factors (pvf) of heating cable types
Cable type
DET-3000
Use for XPI the same factor as
you would use for FCW / ICW
