2
Important Notice
This unit is intended for use as a research or teaching tool
ONLY and is not authorized for use as a component in a life
support device or other clinical system. Therefore, neither
we nor our agents can be held responsible if this notice is dis-
regarded.
WARNING
50-6808 Harvard Surface Electrodes
When using Coupland-Davis type electrodes or ANY type of needle
electrode,
ALWAYS STERILIZE THE ELECTRODES BEFORE AND
AFTER USE ON EACH SUBJECT
to reduce the chance of skin
infections or blood-carried diseases being transmitted.
Introduction
The Harvard Isolated Preamplifier has been designed for ECG
(EKG), EMG, and ENG (EOG) recording with subject isolation. The
front end of the preamplifier is a battery operated opto-isolator.
The remainder of the circuit obtains its power from the host unit.
There are two types of input: a 3-pin socket for ordinary differen-
tial applications, and a “5-lead” input for ECG limb selection, cou-
pled with a 7-position selector switch. There is a 3-position gain
selector and 3-position filter selector.
NOTE: When this Isolated Preamplifier is to be used with our
Universal range of Oscillographs or with either the 50-4027 or
50-4028 4-Channel Interface Adapter, the 50-5966 Isolator Interface
Unit is also required.
