TONEOHM 950 OPERATOR MANUAL
vi
POWER SUPPLY
Check that the indicated line voltage setting corresponds with the local mains power supply. See the rear
panel for line voltage settings.
To change the line voltage settings refer the instrument to a skilled electronics technician. Instructions for
changing the line voltage settings are contained in the TONEOHM 950 Service Manual published by Polar
Instruments.
TONEOHM 950 OPERATION
This manual contains instructions and warnings which must be observed by the user to
ensure safe operation. Operating this instrument in ways other than detailed in this
manual may impair the protection provided by the instrument and may result in the
instrument becoming unsafe. Retain these instructions for later use.
The TONEOHM 950 is designed for use indoors in an electrical workshop environment at a stable work
station comprising a bench or similar work surface.
Use only the accessories (e.g. test probes and clips) provided by Polar Instruments.
The TONEOHM 950 must be maintained and repaired by a skilled electronics technician in accordance
with the manufacturer’s instructions.
If it is likely that the protection has been impaired the instrument must be made inoperative, secured
against unintended operation and referred to qualified service personnel. Protection may be impaired if,
for example, the instrument:
• Shows signs of physical damage
• Fails to operate normally when the operating instructions are followed
• Has been stored for prolonged periods under unfavourable conditions
• Has been subjected to excessive transport stresses
• Has been exposed to rain or water or been subject to liquid spills
CAUTION
Electrical Isolation
Disconnect the board under test from the local mains supply (including ground) when using Track
Resistance, Plane Shorts and Trace ranges.
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