Fresenius Medical Care 2008T

Asset Type

Hemodialysis (HD) Machine

Manufacturer

Fresenius Medical Care

Model

2008T

What This Guide Helps With

This guide assists Clinical Engineering in troubleshooting ultrafiltration (UF) control or scale calibration issues on a Fresenius 2008T HD machine. Symptoms may include inaccurate UF delivery, alarms indicating scale errors, or unexpected patient weight changes. Most often, these issues arise from external factors such as scale misalignment, tubing placement, or environmental conditions rather than internal electronics.

Step-by-Step Troubleshooting

Verify the Machine Level and Placement

• Ensure the HD machine is on a stable, level surface.
• Ultrafiltration scales rely on level placement for accurate measurements.
• Why: Even slight tilting can cause erroneous readings.

Check the Patient and Bloodline Setup

• Confirm that all bloodlines, dialysate lines, and collection bags are properly seated.
• Ensure UF scales are unobstructed by floor mats, chairs, or other objects.
• Why: Misplacement can interfere with scale sensors and UF measurements.

Inspect the UF Scale and Weight Sensors

• Visually check for debris, liquid spillage, or tubing pressing on the scale platform.
• Wipe the scale platform clean if necessary.
• Why: Physical interference can skew readings and cause alarms.

Perform a UF Scale Calibration Check

• Follow the Fresenius 2008T prompts for “Scale Calibration” or “Weight Check” routine.
• Use known test weights if available.
• Why: Confirms that the scale sensor is functioning within acceptable parameters.

Verify UF Settings in the Software

• Check prescribed UF rate and total UF target.
• Ensure machine software is not showing override messages or errors.
• Why: Incorrect programming can mimic scale or UF errors.

Review Alarms or Event Logs

• Document any recent scale or UF alarms.
• Identify recurring patterns (e.g., certain shifts, room conditions, or patients).
• Why: Helps correlate errors with environmental or user-related factors.

If the Problem Persists

If the UF scale still reads inaccurately or calibration fails:

• Remove the machine from service.
• Label as Out of Service.
• Send for vendor service or internal bench evaluation.

Note: Stopping at this point is proper troubleshooting—internal electronics and pump assemblies should not be disassembled in the field.

Clinical Use Tip

• Never perform UF troubleshooting on a patient currently connected.
• Move the patient to another HD machine before performing calibration or weight tests.
• Ensure patient fluid removal is accurately monitored during any machine downtime.

Work Order Documentation (CCR Method)

CCR = Complaint, Cause, Resolution

Complaint

What was reported by the clinical staff.

Example:
“UF control is inaccurate, scale alarms triggered during dialysis session.”

Cause

What was observed during troubleshooting.

Example:
Scale platform was slightly obstructed by tubing and had minor liquid spillage; calibration check failed.

Resolution

What action was taken.

Example:
Cleaned scale platform, verified level placement, recalibrated scale; machine passed test and returned to service.

Helpful Details to Include

• Outlet tested for stability (to ensure power fluctuations are not affecting electronics)
• Any tubing adjustments made
• Alarm messages and frequency
• UF rate discrepancies observed
• Final device status after calibration

Final Thought

Proper UF control is critical for patient safety. Logical, stepwise troubleshooting avoids unnecessary downtime and identifies common external causes before escalating. Thorough documentation ensures safe, efficient resolution and supports ongoing quality improvement.

That is successful troubleshooting.