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What This Guide Helps With
Troubleshooting a bAtt indication or blank display caused by a depleted battery, battery connection problem, or damaged thermometer.
Step-by-Step Troubleshooting
1. Ensure Patient Safety First
Remove the thermometer from clinical use until proper display operation and temperature measurement are confirmed.
Provide staff with a known-working thermometer for patient temperature assessment. Do not troubleshoot or verify operation during active patient care.
Expected outcome: Patient temperature measurements continue using reliable alternate equipment.
2. Confirm the Reported Display Condition
Press and hold the scan button while observing the display.
Identify whether the thermometer shows:
- bAtt, indicating a low battery condition.
- A completely blank display, which Exergen identifies as no battery or a very low battery condition.
- Err, which indicates a different processing or operational issue.
Expected outcome: The reported symptom is accurately identified before corrective action is taken.
Exergen identifies bAtt as low battery and a blank display as no or very low battery in the TAT-5000S display diagnostics chart.
3. Inspect the Thermometer Externally
Examine the thermometer for:
- Cracked or damaged housing.
- Signs of a drop or impact.
- Fluid intrusion or dried contamination near the battery compartment.
- An unreadable or damaged display window.
- Evidence of unusual heat, odor, or battery leakage.
Do not continue troubleshooting if the unit appears physically damaged, has been immersed, or shows battery leakage affecting the device.
Expected outcome: No external damage is found that would make further functional checking inappropriate.
4. Access and Inspect the Battery Compartment
With the thermometer removed from patient use, insert the end of a bent paper clip into the side pinhole to release the battery compartment door.
Remove the battery and inspect for:
- Loose battery connection.
- Corroded or contaminated battery contacts.
- Swollen, leaking, or damaged battery.
- Damaged battery compartment door or retention features.
Dispose of a depleted or leaking battery according to hospital policy.
Expected outcome: The battery compartment is clean, intact, and suitable for a replacement battery.
5. Replace the Battery
Install a new, high-quality alkaline 9-volt battery in the same location and orientation as the removed battery. Reinstall the battery compartment cover securely.
Exergen specifies the battery as the only user-serviceable component and instructs use of a high-quality alkaline 9-volt replacement battery.
Expected outcome: The battery is securely connected and the compartment cover is fully seated.
6. Verify Display Startup and Normal Scan Response
Press the scan button after battery replacement.
Confirm that:
- The display activates.
- The bAtt indication is no longer present.
- The thermometer enters normal scanning operation when the button is held.
- The display remains legible and does not intermittently blank out.
If the display returns to normal and remains stable, continue to the functional check and stop replacing parts.
Expected outcome: The thermometer powers normally with a clear, stable display.
7. Perform a Functional Check Away from Patient Care
With the unit clean and removed from active patient use, perform a basic operational scan according to department procedure or use a temperature verification method available to Clinical Engineering.
Confirm that:
- The device responds consistently to scan-button activation.
- A temperature value is displayed after scanning.
- No bAtt, blank display, or Err condition reappears.
- The reading is reasonable or passes the available verification check.
Do not return the thermometer to use if performance is intermittent or the reading cannot be trusted.
Expected outcome: The thermometer displays stable operation and is suitable for return to service according to department policy.
If the Problem Persists
If the display remains blank after installing a known-good alkaline 9-volt battery, if bAtt remains displayed, or if the unit has corrosion, physical damage, intermittent power, or an unresolved error, common external causes have been ruled out.
The condition is likely related to an internal connection, display, switch, electronic, or damage-related failure. Exergen states that service, repair, or adjustment beyond battery replacement requires return of the thermometer for service.
The device should be:
- Removed from service.
- Labeled Out of Service.
- Sent for repair, vendor evaluation, or replacement consideration according to department policy.
Knowing when to stop after safely checking the battery and observable external conditions is proper troubleshooting.
Clinical Use Tip
Do not troubleshoot a thermometer while it is needed for patient assessment. Supply staff with a verified working thermometer first, then evaluate the affected unit away from the patient-care workflow.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Clinical staff reported that the Exergen TAT-5000S displayed bAtt and then became blank when the scan button was pressed."
Cause
What was observed during troubleshooting.
Example:
"Found depleted 9-volt battery with no visible thermometer damage or battery-compartment corrosion."
Resolution
What action was taken.
Example:
"Replaced the battery with a new alkaline 9-volt battery, verified normal display and scan response, and returned the thermometer to service."
Helpful Details to Include (If Known)
- Display condition observed: bAtt, blank, intermittent, or Err
- Scan button response before and after battery replacement
- Battery type and condition removed
- New alkaline 9-volt battery installed
- Battery compartment inspected for corrosion or leakage
- Housing inspected for drop or fluid damage
- Functional check result
- Final device status: returned to service or removed from service
Final Thought
A low-battery or blank-display complaint should begin with patient safety, symptom confirmation, external inspection, and a known-good battery replacement. When normal operation does not return, remove the thermometer from service rather than attempting unapproved repair. Accurate CCR documentation clearly records what was reported, what was found, and why the device was returned or escalated.
That is successful troubleshooting.