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Asset Type
Manufacturer
Model
Models Covered
CADD-Legacy 1, CADD-Legacy PCA, and CADD-Legacy PLUS. Model-specific programming, delivery modes, maximum rates, keypad functions, air-detector availability, and test accessories differ. Confirm the complete model number and software revision on the startup screen, then use the matching operator manual and test-data form.
Manual Reference
Smiths Medical CADD-Legacy 1, PCA, and PLUS Technical Manual; and the applicable model-specific operator manual. The PLUS functional sequence and limits below are verified against the CADD-Legacy PLUS Model 6500 Operator's Manual.
Manufacturer Recommendation / AEM Status
Smiths Medical recommends annual functional inspection and testing for all CADD-Legacy pumps to verify function and accuracy. The pump must be in Lock Level 0 for the functional tests. These pumps are sealed units; service and repair are restricted to Smiths Medical or its authorized agents. This page preserves the annual interval and manufacturer test limits. Do not extend the interval through an AEM program without documented risk assessment and approval.
What This PM Procedure Covers
- Identity, error history, cleaning, housing, display, keypad, battery compartment, connectors, cassette interface, lock, sensors, valves, and expulsor
- Power-up, LCD, cassette sensor, motor and gear train, reservoir-empty alarm, run/stop function, activation timing, and GIVEN value
- Air detector and upstream occlusion sensor when installed and enabled
- High-pressure alarm verification using either of the two OEM methods
- Gravimetric delivery-accuracy test with a ±6% acceptance limit
- Restoration of model-specific configuration, documentation, and disposition
Required Tools and Equipment
- Current model-specific CADD-Legacy operator manual, technical manual, and facility test-data form
- Two new approved AA alkaline batteries and an approved AC adapter if that accessory is used by the facility
- New 50 or 100 mL CADD medication cassette reservoir or compatible CADD administration set; additional sets are required if a failed accuracy test must be repeated
- Distilled or room-temperature water, 50 or 60 mL syringe, clamps, and appropriate IV bag for applicable sensor tests
- Calibrated balance accurate to 0.1 g for gravimetric accuracy testing
- For OEM occlusion Test I: 1 mL syringe and water-filled cassette; or for Test II: calibrated pressure gauge, 40 ± 1 psi pressure source, water-filled pressure vessel, regulator, and safety glasses
- Approved cleaning agent, lint-free cloths, and 70% minimum isopropyl alcohol swabs for battery contacts
Step-by-Step PM Procedure
1. Remove the Pump From Clinical Use
Action: Confirm no patient is connected, stop the pump, remove the disposable set, label the unit as under service, and move it to a controlled test area. Use water only for wet testing.
Expected outcome: The pump is safely controlled and cannot deliver medication during service.
2. Verify Identity and Manual Applicability
Action: Record asset tag, complete model and serial number, software revision, delivery mode, installed air detector and upstream sensor, accessories, department, and PM due date. Match the pump to the correct current manual. Do not disclose or place the Lock Level security code on a patient-accessible document.
Expected outcome: The physical pump and configuration agree with the CMMS record, and the correct model-specific instructions are established.
3. Review History and Last Error Code
Action: Review prior PMs, repairs, drops, liquid events, programming complaints, interrupted delivery, short battery life, damaged sets, alarm history, and the startup Last Error Code. An immediate electrical or mechanical error requires removal from service.
Expected outcome: Repeat problems and unresolved safety issues are identified before testing.
4. Clean the Pump and Battery Contacts
Action: Remove power and clean the exterior and accessories only with a manual-approved agent. Do not immerse, sterilize, use abrasive/plastic solvents, or allow fluid into the keypad, battery compartment, or connectors. Clean corroded or contaminated battery contacts with a swab wetted with at least 70% isopropyl alcohol and allow all surfaces to dry.
Expected outcome: The pump is clean and dry, with no residue, fluid intrusion, or remaining contact contamination.
5. Perform Visual and Mechanical Inspection
Action: Inspect the LCD, occlusion-sensor seals, valves, expulsor, pump hinge area, lock, cassette sensor, keypad, indicator light, power/accessory jacks, air detector, housing, labels, battery compartment, door, and housing tabs. Press each key for a distinct dome feel. Install the battery door and attach/lock a new 50 or 100 mL cassette or administration set; gently twist and pull it.
Expected outcome: No damage, corrosion, loose part, flat key, bent contact, broken door/tab, unreadable marking, or fluid entry is present. The battery door fits snugly, the lock operates smoothly, and the cassette remains firmly attached.
6. Perform the Power-Up and LCD Checks
Action: Install approved batteries or turn the pump on. Verify the serial/model/software screen, all 32 character blocks, programmed-value review, audible beeps, and final STOP screen. Repeat the LCD block screen as directed by the model-specific manual and inspect for missing pixels.
Expected outcome: No unexpected Last Error Code appears, all character blocks/pixels are present, six audible beeps confirm successful startup, and STOP is displayed.
7. Verify the Cassette Sensor and Lock
Action: With the correct cassette/set attached and locked, unlock it as directed by the manual.
Expected outcome: The pump sounds the continuous two-tone alarm and displays the applicable cassette-disconnected message, such as No Disposable, Clamp Tubing.
8. Verify Motor, Gear Train, and Empty-Reservoir Alarm
Action: Using the model-specific test program, set the reservoir volume to 2.0 mL and prime while listening for abnormal motor noise or grinding. Count the specified prime sequence. Then set 1.0 mL and repeat the prescribed prime sequence.
Expected outcome: The motor runs smoothly, completes 10 double activations, and stops. At the 1.0 mL setting the pump completes the sequence, alarms, and displays Reservoir Volume Empty.
9. Verify Start, Stop, Activation Timing, and GIVEN
Action: Program the model-specific annual test values and disable the air detector only when the manual directs. Start and stop the pump and verify the displayed states and audible beeps. For the PLUS sequence, set reservoir volume to 1.0 mL and continuous rate to 50 mL/hr, start a timer at the first motor activation, and count activations. Review and clear the GIVEN value.
Expected outcome: RUN and STOPPED states behave correctly. For the PLUS sequence, one activation occurs every 6 seconds; approximately 66 seconds and 10 activations later, the reservoir-empty alarm occurs. GIVEN shows 1.00 mL before clearing and 0.00 mL afterward.
10. Test the Air Detector When Equipped
Action: Enable the air detector. Thread dry/empty tubing through its groove and start the pump; then repeat using a correctly primed, air-free fluid path.
Expected outcome: Dry/empty tubing produces the continuous two-tone alarm and Air In Line Detected. A properly primed, air-free path runs without an air alarm.
11. Test the Upstream Occlusion Sensor When Equipped
Action: Enable the upstream sensor. Prime the approved bag-spike administration set with water, run at the model's maximum continuous rate, and clamp the tubing halfway between the bag and pump.
Expected outcome: The pump alarms within 3 activations after the upstream tubing is clamped.
12. Test the High-Pressure Alarm
Action: Perform one complete OEM occlusion-pressure test. For Test I, attach an air-free water-filled cassette and 1 mL syringe set at 1.0 mL; start the pump and slowly depress the plunger. The alarm must occur with the syringe between 0.5 and 0.1 mL. For Test II, connect the water-filled cassette directly to a calibrated pressure setup, run at 50 mL/hr, raise pressure rapidly only to 8 psi, then at no more than 3 psi/min until alarm.
Expected outcome: Test I meets the syringe-position limit, or Test II alarms between 12 and 40 psi (0.82 to 2.76 bar). For Test II, record the actual pressure, wear safety glasses, and reduce pressure to zero before detaching the cassette.
13. Perform Gravimetric Delivery-Accuracy Testing
Action: Fill a new compatible cassette with room-temperature water, remove air, attach the required anti-siphon/flow-stop extension, and record the complete assembly's predelivery weight. Program a 20 mL intended delivery and the manual-specified test rate (125 mL/hr for the PLUS sequence). Run to the reservoir-empty alarm, clamp at the same location, and record postdelivery weight. Treat 1 g of water as approximately 1 mL under the stated test conditions. Calculate delivered volume and percentage error: (delivered volume - 20 mL) / 20 mL × 100.
Expected outcome: Accuracy error is within ±6%. If the error exceeds ±6%, repeat with a new cassette. A second failure requires removal from service and Smiths Medical/authorized service.
14. Restore Configuration and Document
Action: Stop the pump, dispose of wet-test sets, restore the authorized model-specific air-detector/upstream-sensor settings and lock level, verify date/time and normal startup, install serviceable batteries, clean the exterior, and document all readings, calculations, equipment IDs, parts, and disposition.
Expected outcome: No test program or unsecured setting remains, and the pump is complete, traceable, and either returned to service or clearly removed from service.
Electrical Safety Testing
The CADD-Legacy pump operates from two AA batteries and has no protective-earth conductor. The OEM annual procedure reviewed for this page does not specify routine mains leakage testing for the standalone pump. Inspect the optional AC adapter, cord, plugs, power jack, and strain relief before use. Test a separately powered adapter under its own labeling, current manufacturer documentation, and facility electrical-safety policy. Never connect a patient during service testing.
Pass / Fail Criteria
PM Pass Criteria
- Correct model/manual established; inspection, cleaning, battery door/contacts, keypad, cassette attachment, lock, sensors, valves, expulsor, housing, labels, and connectors pass
- Power-up, LCD, audio, cassette sensor, motor/gear train, empty-reservoir alarm, run/stop function, activation timing, and GIVEN checks pass
- Air detector and upstream occlusion sensor pass when installed/enabled
- High-pressure alarm meets one complete OEM test: 0.5 to 0.1 mL syringe position for Test I, or 12 to 40 psi for Test II
- Gravimetric delivery error is within ±6%, using a new cassette for any required repeat
- Configuration is restored and all readings, calculations, test equipment, and disposition are documented
Remove From Service Criteria
- Unexpected Last Error Code, damaged seal/housing, fluid intrusion, broken battery door/tab, cassette-lock defect, damaged sensor/valve/expulsor, missing pixels, abnormal motor noise, or unreliable key
- Failed cassette, reservoir-empty, air, upstream-occlusion, or high-pressure alarm test
- Delivery error remains outside ±6% on the repeat test with a new cassette
- Any unresolved condition that could cause unintended delivery, interruption, incorrect programming, or loss of power
Copy/Paste CMMS Work Order Procedure
This procedure is for trained personnel using the current model-specific documentation. CADD-Legacy pumps are sealed; do not open, alter, or repair them unless authorized by Smiths Medical. Use water only for bench testing, protect security codes, and never return a failed pump to clinical use.