HARVARD 50-9513 Operating And Maintenance Instructions Manual Download Page 6

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Siting and Fixing the Electrodes

Fig. 2 below shows a suggested positioning of electrodes for ENG

(EOG). Note the positioning of the reference electrode (or zero volt

electrode). This electrode (within reason) can be placed anywhere.

For EMG, just place the electrodes over the group of muscles to be

monitored, see Fig. 3 below.

Figure 3

Figure 2

–

To 3-pin socket
on Isolated
Preamplifier

Bicep

Ticep

Earth

Summary of Contents for 50-9513

Page 1: ...84 October Hill Road Massachusetts 01746 Tel 508 893 8999 Fax 508 429 5732 e mail bioscience harvardapparatus com Web Site harvardapparatus com Operating and Maintenance Instructions Harvard Isolated...

Page 2: ...illograph 8 9 Use with the Harvard Student Oscillograph 10 11 Problems 12 Service Information 12 13 Customer Contact Addresses 13 Diagrams Figure 1 Isolated Preamplifier Controls 3 Figure 2 ENG Electr...

Page 3: ...ing 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 op...

Page 4: ...V Filtering 3 position filter switch 30 Hz 3 dB down 150 Hz 3 dB down 15 kHz 3 dB down Gain Selectable x10 x100 x1000 Other Facilities DC level control battery level indicator choice of DC or AC coupl...

Page 5: ...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 Always ensure that the electro...

Page 6: ...ing of the reference electrode or zero volt electrode This electrode within reason can be placed anywhere 5 For EMG just place the electrodes over the group of muscles to be monitored see Fig 3 below...

Page 7: ...e 0 volt reference Essentially an ECG can be recorded from any part of the body but unless the conventional positions are used the interpretation of the results would be difficult For more guidance pl...

Page 8: ...7 AVL I AVR II III AVF V1 V2 V4 V5 V6 V3...

Page 9: ...ction 3 4 0 follow steps 1 to 13 inclu sive 6 Plug the Isolated Preamplifier to the Isolator Interface 7 Switch the Isolator Interface on and check that the battery indicator 1 on the Preamplifier is...

Page 10: ...ier s FREQ CUT control 4 If you are performing a 5 lead ECG you may select the various limb configurations using switch 2 Calibrate the waveform using the Oscillograph s the CAL 0 1 switch Z This will...

Page 11: ...raph Instruction manual section 3 4 0 follow steps 1 to 13 inclu sive 6 Connect the Isolated Preamplifier to the INTERFACE socket S on the Student Oscillograph 7 Check that the battery indicator 1 on...

Page 12: ...control 4 If you are performing a 5 lead ECG you may select the various limb configurations using switch 2 Calibrate the waveform using the Oscillograph s the CAL 0 1 switch Q This will cause the pen...

Page 13: ...on the Isolated Preamplifier 4 If the Isolated Preamplifier is sited close to a main power lead then move one or the other or preferably both as far apart as possible Service Information Fitting or R...

Page 14: ...address below stating the nature of the fault and the approximate date of purchase if possible ENGLAND Harvard Apparatus Ltd Telephone 0732 864 001 Fircroft Way Fax 0732 863 356 Edenbridge Telex 9529...