MEDIAID 340V, Руководство пользователя, Страница: 28 / 40

Operating the Model 340V
- 22 -
circuit, and the pulse oximeter’s light-detection circuit are tested. This
occurs by the emission of the sensor light at a preset frequency and
level, and the monitoring of the received signal from the sensor detector.
Serial Communications Port Test - Test 6
This test is used in the factory only and cannot be accessed by the user
after production.
Reference Voltage Test - Test 7
It takes ten seconds to determine “ Pass ” or “ Fail ,” verifying the unit’s
internal reference voltage. The display is blank while the test is being
run. A failure is indicated by the display of
E R R 7
, and a pass is indicated
by the next test being performed.
Analog Output Test - Test 8
The use of a voltmeter is required. To perform this test, follow these
steps:
1) Connect one lead to PIN 6 (OXYGEN SATURATION ANALOG
OUTPUT) and the common output lead to PIN 7 (GROUND SIGNAL
COMMON) of the DATA PORT (see Chapter 3,
“Data Transmission,”
FIG. 1).
2) Once initiated, each depression of the ALARM OFF KEY tests the
three saturation values, which are displayed in the left window in
ascending order. Observe the voltmeter display to confirm a proper
operation as listed below:
%SpO
2
PIN 6
0% => 0.000V ± 0.001
50% => 0.500V ± 0.010
100% => 1.000V ± 0.020
3) Connect the first lead to PIN 3 (PULSE RATE ANALOG OUTPUT) of
the DATA PORT to test the three pulse rate values as they are
displayed in the right window.
BPM PIN 3
0 => 0.000V ± 0.001
125 => 0.500V ± 0.010
250 => 1.000V ± 0.020
Internal Memory Test - Test 9
Upon initiation, this test checks each location of the pulse oximeter’s
internal memory. If all locations are functional, the number
1 2 8
is
displayed.