SPX Radiodetection PCMx Guide De L'utilisateur page 5

Tx-150 Tx-25
PCM &
10
2
3
7
10
4
2
3
1 7
transmitters
PCM
8
8
8
The Tx-150PCM and the Tx-25PCM
are constant current transmitters which
transmit a 4Hz mapping frequency
suitable for pipeline surveys.
The Tx-150PCM (150W) allows for long
9
range signal detection of up to 30km
(20 miles). Significantly fewer pipeline
connection points are needed thereby
reducing the time required to evaluate a
4
section of pipeline.
The Tx-25PCM (25W) has internal Li-ion
5
batteries that allow it to operate in the
field independently of external power
sources.
Transmitter features
6
1. On/Off switch.
2. LCD display: Indicates current output,
(4Hz or 8kHz) in Amps.
3. LED indicators. Provide critical
feedback on the transmitter's
operation.
4. AC Input socket.
5. DC Input socket (Tx-150PCM only).
6. Output lead socket.
7. Output Level Selector: Select the
10
output level in Amps.
8. Frequency Selector: Selects the
6
frequency.
9. Communication Port: For service
9
personnel only.
10. Heat sink: Vents heat from the
transmitter during operation.
Transmitter controls
Frequency Select
The rotary switch selects the applied
frequencies as follows:
ELF Transmission lines
ELF Maximum range.
35% 4Hz and 65% ELF
(128Hz or 98Hz).
ELCD Use for ACVG and current
direction.
35% 4Hz, 30% 8Hz and
35% ELF.
LFCD Use as ELCD, alternative
locate frequency for congested
areas. 35% 4Hz, 30% 8Hz
and 35% LF (640Hz or 512Hz).
8kHz Locate only signal, no 4Hz
frequency for pipeline mapping.
Output Current Selector
This rotary switch allows users to select
different current settings.
The options are;
Tx-150PCM:
100mA, 300mA,
600mA, 1A, 2A,
3A
Tx-25PCM:
30mA, 60mA,
100mA, 300mA,
600mA, 1A
When the transmitter is operating, the
selected current will remain at a constant
level, unless the input power supply limit
is reached.
9