AMETEK 953 VMAX LDT - Manual (Page 14)

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1080 N. Crooks Road • Clawson, MI 48017 • 800.635.0289 • Phone 248.435.0700 • Fax 248.435.8120 • www.ametekapt.com
AUTOMATION & PROCESS TECHNOLOGIES
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A Tri-color LED is conveniently located next to the
connector to help with set-up and diagnostics.
Diagnostic LED
LED Color Description
None No power to LDT
Green Magnet signal detected and within programmed
range.
Yellow Magnet signal detected, but magnet is outside of
programmed range.
NOTE: Magnet can be programmed in this range
if desired.
Red No magnet signal detected. Make sure magnet
is on the rod and within the active area. Move
magnet back into the range and cycle power.
If a problem exists after reading this section, please
contact our technical support department.
General Checks
Make sure that the magnet is located within the
LDT’s active stroke area. Keep in mind that the LDT
is programmable over the entire active stroke area.
Captive magnet assemblies should be positioned
so that they can move freely over the entire area of
the active stroke without binding or pushing on the
rod end. Non-captive magnet assemblies should be
situated so that the magnet is no farther than 0.2”
from the rod at any point in the magnet assembly’s
movement.
Optional Remote Tester & Programmer
The battery operated remote tester / programmer is
available in either a voltage or current model. P/N
SD0528810 is designed for voltage
units while SD0528811 is for current
units. Both units are designed to
work with connector option S only.
These units are typically used to
demonstrate the functionality of the
LDT in the field, however, they can
be used as a handy troubleshooting
/ programming device.
1. Attach the 5 pin Euro connector
to the VMAX.
2. Push the toggle switch to the ON position to power
the LDT.
3. Place magnet assembly where Zero is to be
located, but within the active region of the probe.
4. Push the black Zero button for 4 seconds,
release for 1 second. Within 5 seconds, push
the Zero button again. This completes the Zero
programming process.
5. Place magnet assembly where Span is to be
located, but within the active region of the probe.
6. Push the black Zero button for 4 seconds, release
for 1 second. Within 5 seconds, push the Span
button.
NOTE: This time the Span button is pushed for the
final programming step.
This completes the programming process.
Appendix A: Troubleshooting
NOTE: Ferromagnetic material (material readily
magnetized) should be located no closer than 0.25”
from the magnet or LDT rod end. This includes
mounting brackets, magnet spacers, magnet brackets,
and mounting screws. Ferromagnetic material can
distort the magnetic field, causing adverse operation or
even failure of the LDT.
Check all LDT wires for continuity and/or shorts. It
is preferred that the cable between the LDT and the
interface device be one continuous run. If you are
using a junction box, it is highly recommended that the
splice junction box be free of AC and/or DC transient-
producing lines. The shield should be carried through
the splice and terminated at the interface device end.
Power Supply Checks
This section will help you to determine if your power
supply is adequate for the LDT to operate properly, or
if the LDT’s cable has a short or open.
In order for the VMAX to operate properly, the external
power supply must provide a level between 7-30 VDC.
A power supply providing voltage above this specified
range may damage the LDT. A power supply providing
power below this specified range will not be sufficient
Optional In-Line Programmer
The 955-1409 is a remote
programmer that can help
simplify the programming
process. The programmer
is a portable device
that can be temporarily or permanently
installed in series with the VMAX with
connector option S.
1. Remove the 5 pin cordset to the LDT.
2. Attach the existing cordset to the 955-1409
programmer.
3. Attach the other end to the LDT.
4. Apply power to the LDT.
5. Place magnet assembly where Zero is to be
located, but within the active region of the probe.
6. Push the Zero button for 4 seconds. Release the
button for 1 second. Within 5 seconds, push the
Zero button again.
7. Place magnet assembly where Span is to be
located, but within the active region of the probe.
8. Push the Zero button for 4 seconds. Release the
Zero button for 1 second. Within 5 seconds, push
the Span button.