System Setup
Revision C, August 2013
2-3
Communication port assignment
Windows will automatically assign a communication port number for the serial or USB
port which is being used for communication to and from the ERT Control/Gating
Module. The assignment is made when the PC is turned on. The most common port
assignments are “com1” for a serial connection and “com4” for a USB connection.
However, other assignments are possible.
Follow these instructions to determine the com assignment:
Windows XP: click Start>Settings>Control Panel>System>Hardware tab>Device
Manager>expand Ports (COM & LPT) and read the serial or USB assignment.
Windows Vista and seven: click Start>Control Panel>System>Device
Manager>select continue in the permission window>expand Ports (COM & LPT)
and read the serial or USB assignment.
Setting the communication port in PC-sam
To set the com port, double click the PC-sam icon on the desktop. Click the button
labeled “Click Here To Show Full Setup Screen”. The com port assignment should be
set in the upper right hand portion of the Full Setup Screen.
Testing the monitoring and gating system
The system can be tested using the Simulator (750100). Connect the Simulator to the
ERT Module using the
Simulator ECG leads (SEL-705) and the Simulator Temperature
Cable
(STC-105). The simulator generates an ECG waveform with respiration
superimposed as well as a temperature reference.
Turning on the Simulator power should result in ECG and E-resp waveforms and a
temperature reading on the PC display. The ECG waveform appears after the offset
voltage reaches 2.5 V (refer to Chapter 3). Adjust the simulator amplitudes, if
necessary, to obtain heart and respiration rate readings and indications of gate
detection. Turning on the gradient switch superimposes spikes on the ECG waveform.
The effect should be barely noticeable on the PC display. The simulator is powered by
an internal 9V battery, which is not rechargeable (refer to Chapter 5).
Caution: the Simulator battery is magnetic and should not
be extended into the magnet bore
Open the SYSTEM INFO window and observe the 50/60 Hertz notch filter setting for the
ERT Module. Make certain the filter is set properly for your location (50 Hz in Europe,
60 Hz in US, etc.) The ERT Module has a provision for the filter to be changed by the
user (refer to Chapter 4).
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