HP Codemaster Maintenance procedure

Title: Defibrillator – Hewlett Packard

Date: October 20, 2018

P/N M1722

DISCLAIMER: THIS PROCEDURE PROVIDED "AS IS"
AND WITH POSSIBLE FAULTS. USER MUST VERIFY
BEFORE USE. NEITHER PROVIDER NOR WEBSITE
ASSUMES ANY RESPONSIBILITY FOR ITS USE.

file = defib-HP-Codemaster

1. General
Applies to Hewlett Packard Model “Codemaster XL”
(M1722B) Defibrillator

2. Reference Documents
Service Manual HP Document M1722-91909
User Manual HP Document M1722-94980

3. Tools / Fixtures / Labels /Accessories

ECG Simulator (may be part of line safety tester)
Paddles – as shown in picture
Safety Analyzer ex: Fluke 232D
ECG Cable 6-prong, 3 leads.
Chart Paper --- p/n 40457C/D or 50 mm equivalent
M1781 Test Load (optional)

Note: The defibrillator automatically adjusts to the line voltage
that is supplied (from 100–230 VAC ±15% at 50/60 Hz). No
manual setting or adjustment is required. This procedure does
not cover units with the SP02 option.

4. Basic PM Procedure

4.1. Physical Inspection – check battery age, case & cord

and paddle integrity.

4.2. Turn on unit via the rotary switch. Verify defib unit turns on with battery only. No self diagnostics

will be evident. Connect the three lead ECG cable to the simulator, matching colors or the other
designators. Check that paper has been installed. After turn-on, connect the unit’s line cord to
the safety analyzer; with line power the AC PWR and Bat Charge LED’s should illuminate.

4.3. EKG Lead Select Setup and Results

Hit the <Lead Select> button in order to display the EKG waveform.

Note: For an emergency evaluation you can monitor a patient’s ECG through the paddles when leads are
not attached to the patient (from user manual).

At this point on the defib, check that the audio volume dial and the waveform size buttons work.

4.4. Recorder Check: With a readable waveform on the CRT display, press the <Record> button to start

and then stop the printout.

Note: For joule delivery checking, there are three techniques that follow in order of preference and ease.

4.5. Joule Test with Paddles -- Using an External defib Test Device

If necessary set up the external testor for a low wattage pulse. On the
main unit, set the power dial for 5 joules. Apply both paddles to the load
test fixture, press <Charge>, and after the charging tone changes to
indicate ready, press <Shock>. Note value of output shock. The
reading on the simulator should be within “4% +/- 1 joule of the setting
on the difib dial”. Repeat for several other settings 50, 150, 300.

4.6. Joule Test Using Built-In energy circuit.

With the paddles in their holders (Sternum on left, Apex on right), press the yellow charge button.
Then press and briefly hold both Shock buttons at once, which will deliver a pulse. The recorder
will print a test report.

4.7. Joule Test with dummy load P/N M1781 Test Load

Refer to Service Manual, Section “Testing the Defibrillator” Brief intro in Appendix.

4.8. Battery Capacity Check

Refer to Appendix for the complete sequence of steps. An alternate and simpler but unofficial
check verifies that the device can successfully deliver three successive 300 joule charges all
within 11 seconds each using battery only.

4.9. Patient Leakage Test / Line Leakage Test

If not already done, using a safety tester, connect the defib AC line cord to the tester.
* Line leakage with ground open is typically 150uA, 200 max.
* The “all patient leads to ground” leakage is typically 3uA, 10uA max.

APPENDIX

Setup and Diagnostic Menu Tests

To access the setup/diagnostic menu tests, turn the Energy Select control to Monitor On, while pressing
the <Sync> and <HR Alarm> keys. The monitor display will list 13 individual tests.

For example, use the <ECG Size> up and down arrows to select “TEST DEFIB”. Then hit <Lead
Select>. Further info for this is on p 3-13 of the service manual, but not recommended unless absolutely
needed.

Battery Capacity Check (from Service Manual)
This can take several hours and deemed not suitable for low-resource locations.