Page 5.10
SCHILLER AT-2 6-Channel ECG Unit
SERVICE HANDBOOK Issue 2.1 November 1998
Chapter 5
Adjustments
Service Printout (cont.)
Electrode dc offset This gives the voltage drop in the patient cable and can
indicate any faults in the patient cable or patient electrode. The
value given is the dc voltage between the left leg electrode and
all other electrodes. The measurements obtained will indicate
any cable short circuits or open circuits. The measured voltage
value will depend on where the electrodes are connected. The
voltage readings that can be expected are as follows:
With patient connected - ± 100mV
With patient simulator connected - ± 20 mV - this will
depend on the patient simulator used and must be taken
as a flexible measurement.
With all electrodes shorted together: - ± 20 mV
No patient cable connected: -350 to -450mV
TPH TEMP This is the measured ambient temperature that the processor
uses to correct print quality.
This reading should be ambient temperature ± 5
o
.
EPROM This is the checksum for the EPROM. Its value varies from one
software version to another.
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