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Manual Reference
CARESCAPE Monitor B850 Service Manual, Software Version 2, Hardware Version CPU-C1, 2106778-001, 19 June 2018.
Manufacturer Recommendation / AEM Status
The provided manual is a full service manual and includes planned maintenance, corrective maintenance checkout, electrical safety testing, functional checks, and Appendix B maintenance check form information.
Manufacturer-Listed PM Frequency
Manufacturer-listed planned maintenance interval: every 2 years after installation.
Manufacturer-Listed Planned Maintenance Order
The manual lists the planned maintenance order as visual inspection, electrical safety tests, and functional check, all steps.
Manufacturer-Listed Replacement Interval
The CPU timekeeper battery is listed for replacement every 5 years, or whenever Service Monitor Error Code 0xHOST1100 is shown.
The FRU list identifies CPU C1 Processor PCB part number 2021440-003, which includes the CPU PCB assembly and CPU timekeeper battery. The manual section found does not list the CPU timekeeper battery as a separate standalone part number.
Manufacturer-Listed PM Items
Manufacturer-listed planned maintenance includes visual inspection, electrical safety checks, functional check, and Appendix B Maintenance Check Form documentation.
Manufacturer-Listed Visual Inspection Items
Visual inspection includes checking that the monitor and connected peripheral devices are undamaged, monitor and peripheral devices are properly mounted with specified mounting solutions, cables are intact and properly connected, modules are properly connected and locked, and the pivoting module frame and battery door are properly locked.
Manufacturer-Listed Electrical Safety Checks
Electrical safety checks include power outlet check, power cord and plug check, ground integrity check, ground leakage current test, and touch current test.
Manufacturer-Listed Functional Checks
Functional checks include start-up, display picture quality, touchscreen control, PSM / PDM identification, E-module identification, trim knob, keypad, remote, mouse, alphanumeric keyboard, barcode reader, MC Network and S/5 Network, IX printers, InSite RSvP, and recorder if applicable.
Post-Repair Safety Inspection Requirements
The manual lists corrective maintenance checkout requirements before returning the monitor to clinical use. Depending on the service activity, the required checkout may include visual inspection, electrical safety testing, and functional checks.
Examples requiring visual inspection and electrical safety testing include replacement or detachment of the power supply, CPU PCB assembly, CPU timekeeper battery, third video card, enclosure kit, hardware kit, speaker assembly, and uDOM.
AEM Note
If a facility performs this PM at a different interval or changes the listed activities, that should be handled under the facility’s approved AEM program, risk assessment, maintenance history, and applicable regulatory requirements.
What This PM Procedure Covers
This procedure covers scheduled 2-year planned maintenance, visual inspection, electrical safety testing, functional checkout, CPU timekeeper battery interval review, and CMMS documentation for the GE Healthcare CARESCAPE Monitor B850.
Required Tools and Equipment
Use the tools and accessories required for the installed configuration. The manual states test equipment must be calibrated, maintained, and functioning before electrical safety testing.
- Calibrated electrical safety analyzer suitable for IEC 60601-1 / AAMI ES60601-1 / EN 60601-1 / CSA CAN/CSA-C22.2 NO. 60601-1:14 testing
- Insulating surface for testing
- Connected system accessories needed for the installed configuration
- PSM / PDM module for module identification check
- E-module if part of the installed system
- Keyboard, mouse, barcode reader, remote, recorder, network printer, or InSite RSvP access if applicable to the installed configuration
Step-by-Step PM Procedure
1. Confirm Device and Configuration
Action: Confirm the monitor is a GE Healthcare CARESCAPE Monitor B850. Record asset number, serial number, software version, module type, and service record number if required by the facility.
Expected outcome: The PM is documented against the correct device and configuration.
Why it matters: The B850 is a modular patient monitoring system. Connected displays, modules, frames, network options, printers, and recorders affect what checks are applicable.
2. Remove From Patient Use
Action: Verify the monitor is not being used for active patient monitoring before PM, electrical safety testing, restart, configuration checks, or recorder checks.
Expected outcome: The monitor is safe to inspect and test without interrupting patient monitoring.
3. Visual Inspection
Action: Inspect the monitor and connected peripheral devices for damage.
Check that the monitor and connected devices are undamaged, mounting hardware is secure and manufacturer-specified, cables are intact and secured, power cord and USB cables are secured where applicable, MC and IX network cables are intact and connected correctly, modules are properly connected and locked, and the pivoting module frame and battery door are locked if applicable.
Expected outcome: No physical damage, loose mounts, damaged cables, unlocked modules, or unsafe installation conditions are found.
Why it matters: The manufacturer-listed visual inspection focuses on damage, mounting, cable security, and module connection issues that can affect monitoring reliability.
4. Electrical Safety Testing
Action: Perform electrical safety testing using the facility’s calibrated electrical safety analyzer and the manual-listed checks.
Perform and document power outlet check, power cord and plug condition, ground integrity, ground leakage current, and touch current.
Expected outcome: All measured values meet the manual-listed acceptance criteria or documented facility criteria if facility policy is stricter.
5. Start-Up Check
Action: Power on the monitor and verify normal start-up.
Expected outcome: Monitor starts normally.
6. Display Check
Action: Verify display picture quality and touchscreen operation.
Check that text is readable, images are clear, brightness is acceptable, and the touchscreen is calibrated and responds correctly.
Expected outcome: Display is readable, clear, and usable.
7. PSM / PDM Identification Check
Action: Connect a PSM or PDM module. Configure ECG1 waveform field and NIBP parameter window with adequate priority.
Expected outcome: ECG waveform field, NIBP parameter window, and related module information appear correctly on the monitor screen.
8. E-Module Identification Check
Action: If E-modules are part of the installed configuration, log in to Webmin and select Information > Device Information. Verify the connected E-module appears in the Acquisition Information / E-Modules table.
Expected outcome: E-module parameter data appears correctly.
9. Controls and Input Device Checks
Action: Check applicable controls and input devices, including hard keys, Trim Knob, keypad, remote, mouse, alphanumeric keyboard, and barcode reader.
Expected outcome: Selected menus open, selected activities start, keyboard language is correct, and barcode data populates correctly.
10. Network / Printer / Remote Service Checks
Action: As applicable to the installed configuration, verify MC Network / S/5 Network connection, IX printer test page, and InSite RSvP status.
Expected outcome: Network symbol and other monitor patient data display correctly where applicable, IX printer prints a test page, and the patient monitor is active on InSite RSvP back office if used.
11. Recorder Check, If Applicable
Action: Configure local waveform printing by selecting Monitor Setup > Printing > Devices > Setup, then set Printout to Waveforms and Location to Local.
Then select Monitor Setup > Printing > Waveforms and configure Waveform 1 as II and Waveform 2 as V1. Start waveform printing and allow the recorder to print for approximately 10 seconds. Verify the header line contains correct information, the grid is clear, and waveform labels appear as configured. Stop printing when complete.
Expected outcome: Recorder printout is clear and correctly labeled.
12. Test Completion
Action: Select Discharge Patient or Reset Case to discard configuration changes made during checkout. Complete Appendix B Maintenance Check Form or facility PM documentation.
Expected outcome: Temporary test configuration changes are cleared and PM documentation is complete.
Electrical Safety Testing if applicable
Use the manual-listed electrical safety acceptance criteria unless facility policy or applicable standards require stricter criteria.
Ground Integrity
Ground resistance measured in ohms, expected ≤ 0.5 Ω or facility/NFPA 99 criteria if different.
For this manual-listed test:
- Without power cord: expected ≤ 0.1 Ω
- With power cord: expected ≤ 0.2 Ω
Result without power cord =
Result with power cord =
Pass / Fail =
Ground Leakage Current
Ground leakage current is measured in microamps.
- Normal Condition, normal polarity: EN / IEC limit ≤ 500 µA; UL limit ≤ 300 µA
- Single Fault Condition, normal polarity: ≤ 1 mA
- Single Fault Condition, reversed polarity: ≤ 1 mA
- Normal Condition, reversed polarity: EN / IEC limit ≤ 500 µA; UL limit ≤ 300 µA
Result NC normal polarity =
Result SFC normal polarity =
Result SFC reversed polarity =
Result NC reversed polarity =
Standard / facility limit used =
Pass / Fail =
Touch Current
Touch/chassis leakage measured in microamps:
Facility limit used =
Result =
Pass / Fail =
- Normal Condition, normal polarity: expected ≤ 100 µA
- Single Fault Condition, ground closed, normal polarity: EN / IEC limit ≤ 500 µA; UL limit ≤ 300 µA
- Single Fault Condition, ground open, normal polarity: EN / IEC limit ≤ 500 µA; UL limit ≤ 300 µA
- Single Fault Condition, ground open, reversed polarity: EN / IEC limit ≤ 500 µA; UL limit ≤ 300 µA
- Single Fault Condition, ground closed, reversed polarity: EN / IEC limit ≤ 500 µA; UL limit ≤ 300 µA
- Normal Condition, reversed polarity: expected ≤ 100 µA
Result NC normal polarity =
Result SFC ground closed normal =
Result SFC ground open normal =
Result SFC ground open reversed =
Result SFC ground closed reversed =
Result NC reversed polarity =
Standard / facility limit used =
Pass / Fail =
Patient Leakage Current
The Appendix A installation form lists patient source and sink leakage checks, but the planned maintenance procedure in Chapter 10 specifically calls out power outlet, power cord/plug, ground integrity, ground leakage, and touch current for planned maintenance. Do not add patient leakage testing to scheduled PM unless facility policy or the device configuration requires it.
Pass / Fail Criteria
PM Pass Criteria
Pass the PM if the monitor and connected devices are undamaged, mounting hardware is secure, cables are intact, modules are locked, battery doors and frames are secure, electrical safety results meet manual-listed or facility-approved criteria, the monitor starts normally, the display and touchscreen function correctly, module identification checks pass, applicable controls and input devices function, applicable network/printer/InSite/recorder checks pass, and no unresolved service error or unsafe condition remains.
Remove From Service Criteria
Remove the monitor from service if electrical safety testing fails, the power cord, plug, enclosure, mounting, module connection, or battery door condition is unsafe, the monitor does not start normally, the display is unreadable, the touchscreen is not usable, required module data does not appear correctly, controls fail in a way that affects clinical use, recorder, network, alarm, or communication failure affects required clinical function, Service Monitor Error Code 0xHOST1100 is present and CPU timekeeper battery replacement has not been addressed, or any condition creates doubt about safe patient monitoring.
Copy/Paste CMMS Work Order Procedure
Optional Short Procedure Block - Post-Repair Safety Inspection
Use the manufacturer service manual, facility policy, and approved AEM program to determine the final PM interval and return-to-service requirements.