Philips IntelliVue MP70 Service Manual

Tests 3 Testing and Maintenance
41
4
When you are satisfied that the flow is set as close as possible to 50 ml per minute, select Store
Flow
and confirm the setting. If you do not store the adjusted flow within 60 seconds of the
adjustment, the old flow setting is restored.
5 If you cannot adjust the flow to within tolerance, replace the pump. If you still cannot make the
flow adjustment, this indicates a fault in the measurement extension, which must be replaced.
Noise Check
1 With the monitor in service mode, select Setup CO
2
menu.
2 Disconnect the flowmeter and connect the 5% calibration gas and flow regulator in its place.
3 Open the valve to apply the 5% calibration gas and wait until the value is stable.
4 Check the noise index (x6) displayed next to the CO
2
value on the display (this indicates the level
of noise on the CO
2
wave). If the value exceeds 3 mmHg, replace the measurement extension.
CO
2
Gas Measurement Calibration Check
After switching the measurement extension on, wait at least 20 minutes before checking the
calibration. Check the calibration of the CO
2
gas measurement as follows:
1 Check that the 5% calibration gas and flow regulator are connected.
2 Calculate the expected measurement value in mmHg as follows:
0.05 x (ambient pressure) = value mmHg
for example 0.05 x 736 = 36.8 mmHg (with an ambient pressure of 736 mmHg)
3 Open the valve on the flow regulator to allow 5% CO
2
gas to flow into the extension. Allow the
value to stabilize.
4 Check that the value on the instrument (measurement value on the main screen, x7)) matches the
calculated mmHg value ± 2.6 mmHg. If the value is outside the tolerance, calibrate as described in
step 9 in this procedure onwards.
5 Disconnect the 5% calibration gas and connect the 10% calibration gas.
6 Calculate the expected measurement value and tolerance in mmHg as follows:
0.1 x (ambient pressure) = value mmHg
±0.07 x (value mmHg) = tolerance
for example 0.1 x 737 mmHg = 73.7 mmHg (with an ambient pressure of 737 mmHg)
±0.07 x 73.7 mmHg = ±5.16 mmHg tolerance
7 Open the valve on the flow regulator to allow 10% CO
2
gas to flow into the extension. Allow the
value to stabilize.
8 Check that the value on the instrument (x8) matches the calculated mmHg value within the
calculated tolerance. If so, the measurement extension is correctly calibrated. If the value is outside
the tolerance, calibrate as follows.
9 If not already connected, connect the 5% calibration gas.
10 Select Cal. CO
2
.
11 Select the value for the calibration gas. (The default value is 5.0%.)

Philips IntelliVue MP70 Specifications

General

Brand	Philips
Model	IntelliVue MP70
Category	Medical Equipment
Language	English