9-8
Chapter 9 Maintenance Check Gas Measurement Accuracy Check Procedure (MGU-800/MGU-810)
Gas Measurement Accuracy Check Procedure (MGU-800/MGU-810)
This section describes about the procedure of gas measurement accuracy check.
Perform the gas measurement accuracy check when the multigas unit is connected.
Warm up the multigas unit sufficiently before updating the checked date of gas
measurement accuracy. To acquire maximum measurement accuracy, 10 minutes of warm
up is required after the power is turned ON.
If the accuracy check is performed using a low pressure gas, the accuracy of gas
measurement will be reduced. Make sure to perform the accuracy check using the specified
calibration gas before its expiration date.
The gas measurement accuracy of the multigas unit should be checked every year. The date
of the last measurement check will be displayed on the "Gas Accuracy Check" screen.
During the accuracy check, gas measurement and other gas function cannot be used.
To correct the gas measurement drift, zero calibration is necessary. The automatic zeroing
is performed periodically, but perform it manually as necessary.
Zeroing should be performed with the transducers opened to air.
During accuracy check, the pressure display on the calibration gas regulator should be in
the range displayed in green.
1Attach the water trap for adult/pediatric to the MGU-800/810, and set the "Flow Rate" to 200 mL/min.
Press the [Menu], [Gas]("Parameter"), [Agent] keys to display the "Agent" setup screen, and select [ 200 mL/
min] for the "Flow Rate".
The "Flow Rate" can be set on the CO
2
, O
2
, N
2
O, Agent setup screen.
12 Withstand Voltage
Test (B-d)
Apply 1500V for 1 minute between exterior and
applied part.
[Caution] The test voltage may differ as the
internal protective circuit configuration differs
depending on the device.
Test according to the test method of IEC 60601-
1.
It should resist the applied voltage.
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