ADInstruments Bridge Amp Owner's Manual page 8

Safety Notes
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• All Bio Amp front-ends (except for the ML138 Octal Bio Amp) and
PowerLab units with a built-in Bio Amp are supplied with a 3-lead
or 5-lead Bio Amp subject cable and lead wire system. The ML138
Octal Bio Amp is supplied with unshielded lead wires (1.8 m). Bio
Amps are only safe for human connection if used with the
supplied subject cable and lead wires.
• All Bio Amp front-ends and PowerLab units with a built-in Bio
Amp are not defibrillator-protected. Using the Bio Amp to record
signals during defibrillator discharges may damage the input
stages of the amplifiers. This may result in a safety hazard.
• Never use damaged Bio Amp cables or leads. Damaged cables and
leads must always be replaced before any connection to humans is
made.
Isolated Stimulator Safety
Instructions
The Isolated Stimulator outputs of a front-end signal conditioner or
PowerLab with a built-in isolated stimulator are electrically isolated.
However, they can produce pulses of up to 100 V at up to 20 mA.
Injury can still occur from careless use of these devices. Several points
must be observed for safe operation of the Isolated Stimulator:
• The Isolated Stimulator output must only be used with the
supplied bar stimulus electrode.
• The Isolated Stimulator output must not be used with individual
(physically separate) stimulating electrodes.
• Stimulation must not be applied across the chest or head.
• Do not hold one electrode in each hand.
• Always use a suitable electrode cream or gel and proper skin
preparation to ensure a low-impedance electrode contact. Using
electrodes without electrode cream can result in burns to the skin
or discomfort for the subject.
• Subjects with implantable or external cardiac pacemakers, a
cardiac condition, or a history of epileptic episodes must not be
subject to electrical stimulation.
• Always commence stimulation at the lowest current setting and
slowly increase the current.
• Stop stimulation if the subject experiences pain or discomfort.
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