T-305E User Manual Version 3.5 | 22
9.
Sheath Fault location using the Kehui T-H200
Note that the Kehui T-100C is the preferred power source for the T-H200, however it will
also work with other suitable high voltage sources and can be powered from the Kehui T-
305 surge generator, used in DC mode as explained above. Connections are shown below:
Operational procedure:
To operate the T-H200 Sheath fault locator, the
T-305E provides a continuous constant DC
high voltage.
i.
T
urn the
MODE
to the
DC
position.
ii.
Power on, such that the
POWER
indicator lights up.
iii.
Turn the voltage
ADJUST
knob to the zero position, otherwise the
START
will not work.
iv.
Press the
START
button. The red
START
light comes on and the green
STOP
light turns
off. The sound of the HV protective device inside the instrument can be heard.
v.
Slowly rotate the
Adjust
knob to increase the output voltage, observing both the
voltmeter and the ammeter. When the current reaches 50-100mA, stop increasing the
HV voltage.
vi.
On the tablet APP, s
elect “cable length” and enter the exact length of the cable, the APP
will calculate the “resistivity” automatically, and store the value for the next stage of
operation. It is recommended to
follow
the T-H200 manual instructions to make the
measurement
xiv.
When the process is completed, discharge the cable and surge generator manually using
the discharge rod (see section 5.1 Using the discharge rod)
Figure 9.1 T-305 Connections to the T-H200
