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Hotwire2012, Service Technician
Category: Electrical
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Experience: Residential, Farm, & Commercial installation and service!
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We are a physicians office and have an ekg machine that we

Customer Question

We are a physicians office and have an ekg machine that we purchased approximately 3 and 1/2 years ago. Today out of the blue it stopped picking up the tracing of the electrical activity of the heart.

Submitted: 1 year ago.
Category: Electrical
Expert:  JACUSTOMER-0ix4l2x2- replied 1 year ago.


JACUSTOMER-0ix4l2x2- :

Does it come on?

Customer :

yes

Customer :

it is tracing but only a flat line prints

Customer :

Something similar occurred about one year ago and they replaced the plug

Customer :

they said these plugs can be tempermental

JACUSTOMER-0ix4l2x2- :

I would start there. Changeing the plug is a quick fix. Was the problem one year ago identical to this one. These machines have to have a good ground going to them.

Customer :

I dont remember the exact details but I think it was the same problem

Customer :

not sure I understand what it means to have a good ground

Customer :

SHould I order a new plug or just try to keep replugging in the same one?

JACUSTOMER-0ix4l2x2- :

Try plugging it into another receptacle. A ground is the third pin on the plug it is normal the round.

Customer :

ok I will try that now. If that does not work, any other suggestions?

JACUSTOMER-0ix4l2x2- :

I would suggest changing out the cord and plug if you can get to the inside to disconnect cord if not change the end. I do believe that once this is done it will work fine. I say this because this is the second time you have had this issue. Normally the cord end is molded and can't be removed. If this one allows it to be removed then it has the possibility to not have been tightened securely or because of heat it expanded then contracted and now the connection inside the cord end is loose.

JACUSTOMER-0ix4l2x2- :

Did changing receptacles work.

JACUSTOMER-0ix4l2x2- :

let me know how things turn out and if you are satisfied please hit except. You can always come back to this page and get assistance with out incurring another charge.

Customer :

I tried it but it did not work

Customer :

The letters *RA* are showing up at the bottom of the screen

Customer :

I dont recall that being there before

Customer :

Are you still available?

Expert:  Hotwire2012 replied 1 year ago.

Typically RA refers to "right arm" in an ekg machine which I know you are aware of, it is possible there is a problem with this lead?

When electrodes are not properly applied, these

measures may not fully compensate for artifact.

High polarization voltages induced by electrodes

applied without conductive gel may cause the

amplifier to overrange, so that a straight line will be

recorded instead of the ECG (see Figure 4-6). The

device will then automatically block and return the

baseline to its normal position. A baseline is then

recorded for approx. 1 second. It is possible to block

the amplifiers manually by disconnecting the RL

electrode.

On the display this condition is indicated by ****

instead of the electrode label

Remedy

·

Apply the electrodes according to instructions.

·

Do not apply the electrodes on top of clothing.

·

Use a contact agent with reusable electrodes (e.g.

moistened electrode paper, electrode cream,

spray, etc.).

·

Wait approx. 10 seconds before initiating a

recording. After the 10-second period, the

automatic functions are enabled and the

polarization voltages have stabilized, provided

the electrodes are properly applied. In case of

improper electrode application, an error message

will appear on the display (RL, LL, LA, LL, V1

to V6).

·

If required, the ADS (cubic spline) and the filters

(20/40 Hz, 60 Hz) can be disabled to verify the

"raw" ECG signal.

I will also post what I believe is the owners/operators manual for this unit.

http://www.gtsmedical.com/docs/32/MAC1200PosManualV1.pdf

41003.8545352199

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