nVent.com | 9
Manual leak testing
AC
AC
SHL
D
RS–
RS+
AC
AC
SHL
D
RS–
RS+
AC
AC
RED
GRN
YEL
BLK
GND
TTSI
M-1
Leak
Location Module
RATING: 24V
ac
±10%
50/60 Hz
3VA
Network
Addr
ess
TTSIM-1
TTSIM-1 Indications:
LEAK
Red
CABLE BREAK
Flashing yellow
SERVICE
Flashing yellow
POWER LED
Green
TTDM-128 Indications:
LEAK Red
CABLE BREAK
Yellow
POWER LED
Green
Text message in 4x20 display
TTDM-128
TRACE
TEK
Initial Power-up and Test
Connect the cable to the alarm module and test the system.
• For direct buried long line underground leak detection
applications, TraceTek requires use of nVent RAYCHEM
TraceTek TTSIM-1. TTSIM-1 can be used as standalone unit or
in conjunction with TTDM-128.
• Apply power to the TraceTek instrument and look for a
“Normal” indication.
– On TTSIM-1, Normal Condition is indicated by a green LED
and a momentary flash of the RED LED every 5 seconds.
– On nVent RAYCHEM TraceTek TTDM-128 the alpha-numeric
display will indicate a channel number and display the words
SYSTEM NORMAL.
• If the Yellow LED is on in any of these instruments or the words
“Cable Break” or “Loop Break” is displayed, then the cable
system must be inspected for loose connections, missing end
terminations until the cable continuity is established and the
“Normal” condition is achieved.
• Leak testing can be done with a mapping cap (TT-MAPPING
CAP-MC) or by bending the sensor cable tightly between
fingers. The MAPPING CAP simulates a leak at the location
where it is installed in the system.
– For TTSIM-1 a red LED will indicate that the simulated LEAK
has been detected.
– For TTDM-128 a leak location will be displayed in feet or
meters (as selected) in addition to the red LED indication
• For larger piping systems with TTDM-128 or TTSIM-1,
the MAPPING CAP should be moved sequentially to each
accessible connector. Record the distance displayed on the
as-built drawings. This will become the basis for the System
Map.
• Create a System Map showing where sensing cables and alarm
modules have been installed. The System Map will include
the beginning and end of sensing cables, and location of any
connections. If using locating alarm modules, the System Map
should include distance readings at significant landmarks
(beginning and end of system, changes of direction, branches,
valves, low points, etc.).
Note
: Do not use fuel to test the TT5000-HS cable. Do not use
solvent to test the TT5001-HS cable. The TT500X-HS cable is not
resettable after exposure. Leak testing should be done, by bending
sensor cable tightly between fingers, or with a mapping cap
(TT-MAPPING CAP-MC). The TT-MAPPING CAP-MC simulates a
leak at the location where it is installed in the system.
