CARDIAC/NEURO INSTRUMENTATION LAB
N-200 PULSE OXIMETER LAB 9
BMET-221
LAB 9 N-200 PULSE OXIMETER NAME: ______
Equipment Needed: Oscilloscope,
DVM,
Function Generator,
Resistors,
DC Power Supply
Dynatech Nevada Safety Analyzer
Bio-Tek Index SpO2 Simulator SN # 96717
Nellcor N-200 Pulse Oximeter
Procedure:
1. ___ Locate the equipment needed.
1a. Read the Specification Data for each testing device and the Theory Of Operation of the Nellcor N-200 (Section 3, Service Manual).
2. ___ In the bench area, properly connect the Safety Analyzer and device/device pair and perform an Electrical Safety Check using the Dynatech Safety Analyzer..
GROUND WIRE RESISTANCE (250 milliohms limit) ______
CHASSIS LEAKAGE (100 uA limit_) ______
LEAD LEAKAGE (10 uA limit1) ______
3. ___ Perform the basic Operation Check (pg11, Operators Manual).
4. ___ Remove the device covers_ and perform any and all Service procedures as given in the Service Mannual (Section 5) for this device. Insure that the device meets the minimum manufacture's specifications for service.
4a. Record any problem found in steps 1-3_.
______
______
5. ___ Make any adjustments and/or repairs necessary for defects noted above.
5a. Record the adjustments/repairs that were neccessary.
______
______
6. ___ If no adjustment/repair was necessary, then perform one of the following adjustments, take the device out-of-adjustment and then bring the device back into compliance of manufacture's specifications.
6a. Battery Charging Voltage 5.3.2 ______
6b. Sync Detector Alignment 5.5.5 ______
6c. A:D/D:A Alignment 5.5.9 ______
6d. Powerbase Alignment 5.6 ______
------N200 Pulse Oximetry Instrumentation Continued ------
7. ___ After all performance checks and adjustments are complete, reassemble the device and perform an Electrical Safety Check again.
GROUND WIRE RESISTANCE (250 milliohms limit) ______
CHASSIS LEAKAGE (100 or 300 mma limit1) ______
LEAD LEAKAGE (10 mma limit1) ______
8. ___ Connect the Bio-Tek Index SpO2 Simulator to the Nellcor N-200 and perform a Operational check-out of the N-200 as per the Bio-Tek Index Operation manual.
9. ___ Contact the Biomedical Instructor and demonstrate the correct nomenclature identification and proper operation of the Nellcor N-200. Inst Init ______
10. ___ Demonstrate to the Biomedical Instructor the proper operation of the Bio-Tek Index SpO2 Simulator by performing a operational check on the N-200. Inst Init ______
Directed Questions On Content:
11. ___ Using the Nellcor Operator or Service Manual answer or respond to the following.
a. What type of fuse is used to protect the Battery Pack of the N-200? ______
b. Who is the manufacture for the input connector on the Nellcor 200 pulse oximeter? ______
c. Identify the component's name and part number located in index number 2.6 in the N-200
Monitor Front Panel figure. ______
d. What size is System RAM? ______
e. What is the LEDLOW Flag and what does it do?
______
f. What does the error message "Err 1" indicate? ______
g. Which PCBs could cause failure of the analog or digital outputs of the Powerbase?
______
h. R3 on the Middle Daughter PCB of the Powerbase is used to adjust what parameter?
______
i. The +18 volt power is measured at which component(?), on which PCB? ______
j. A Nellcor Technical Update changes which test? ______
k. VR1 (Voltage Regulator) on the Processor PCB is what type and voltage rating?______
l. Write up a brief description of the Principles of Operation including the types of transducers used through-out the system
------N-200 Pulse Oximetry Instrumentation Continued ------
7. ___ After all performance checks and adjustments are complete, reassemble the device and perform an Electrical Safety Check again.
GROUND WIRE RESISTANCE (250 milliohms limit) ______
CHASSIS LEAKAGE (100 or 300 mma limit1) ______
LEAD LEAKAGE (10 mma limit1) ______
8. ___ Connect the Bio-Tek Index SpO2 Simulator to the Nellcor N-200 and perform a Operational check-out of the N-200 as per the Bio-Tek Index Operation manual.
DEMONSTRATION OF MEDICAL EQUIPMENT:
1. Demonstrate the ability to check the battery charging voltage on the N-200 pulse oximeter.
2. Demonstrate the ability to do the regulated power supply pcb tests.
3. Demonstrate the ability to verify the alarm limits on both adult and neonatal.
4. Verify that the monitor to powerbase communication is ok.
5. In the schematics find ds1, identify what it is and what would be the probable problem if it was not working. (Power supply pcb)
6. Explain what r12 does on the battery charger pcb schematic.