Mindray Passport 5-Lead, Service Manual

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ECG Tests Calibration
7 - 22 0070-00-0420 Passport 5-Lead, 5L, LT, XG Service Manual
2. Check the following sweep speeds for appropriate displays:
12.5mm/sec - 8 second sweep/window
5.0mm/sec - 4 second sweep/window
3.
Disconnect one ECG lead at a time (RA, RL, LL, LA, and C) from the simulator and
observe that the ECG signal changes to a flat line and the message “LEAD OFF: (RA, RL,
LL, LA, and C)” appears on the EL display.
4.
Set ECG simulator to SHORT LEADS. Verify noise does not exceed one pixel resolution.
5.
Set ECG simulator to Ventricular Pacer (waveform = VP). Verify a pacer pulse is
displayed before the R wave of the QRS signal.
6. Set ECG simulator to 5 HZ , 1mv sine wave.
The Passport should be set to lead 1 and size to 1cm/mv.
7.
Press the FREEZE key and verify that the signal displayed on the LCD is 10 mm (p-p) +/
- 1 mm, with an overall trace length of 10 cm +/- 2mm.
8. Adjust the output amplitude of the ECG simulator and the Passport’s size as shown
below and verify the display for each setting.
9. Set the ECG simulator to ECG QRS waveform. Set rate to 252 bpm.
Verify RATE display is 252 +/- 8 bpm.
Decease the RATE to 30 bpm and allow signal to stabilize (May take 30 seconds to
display rate). Verify RATE display is 30 bpm +/- 3 bpm.
10.
Set simulator to 1mv ECG QRS signal , rate to 60 bpm.
Set the Passport to PRINT ON ALARM, install paper in recorder and set LO HR ALARM
to 50 bpm and HI HR ALARM to 120 bpm.
Increase ECG HR to 125 bpm and verify the following:
• The HI ALARM violates with audio tone and RED LED active.
• The recorder (if installed) prints a strip showing the ECG information
• Measure the GRID width and verify overall width of 40 mm +/-2 mm.
• Measure the GRID length and verify overall length of 40 cm +/- 2 cm. (There should be
16 one second tic marks present)
Mute the alarm by pressing the MUTE key.
• Verify that the “ALARM MUTE” symbol is displayed next to HR display on the LCD display
and the alarm is silent.
Decrease the ECG HR to 45 bpm. The ALARM should sound. Then set the ECG HR to 60
bpm and verify the alarm condition is canceled.
INPUT AMPLITUDE SIZE SETTING DISPLAY (P-P)
2mv .025 cm/mv 5 mm (+/- 1 mm)
2mv 0.5 cm.mv 10 mm (+/- 1 mm)
1mv 1.0 cm/mv 10 mm (+/- 1 mm)
1mv 2.0 cm/mv 20 mm (+/- 2 mm)
1mv 3.0 cm/mv 30 mm (+/- 3 mm)
0.25mv 4.0 cm/mv 10 mm (+/- 1 mm)