Fluke 11A/600V fuse
Part: Fluke PN 943260
Specified 11A fuse for FUSED current-input faults.
$12-$30
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Fluke 289 Multimeter Error Codes
The Fluke 289 is a professional true-RMS multimeter designed for industrial technicians. Error messages and indicators display on the primary and secondary LCD displays. Unlike older Fluke meters, the 289 has an extended error message capability.
Fluke 289 Error Messages Table
| Display | Meaning | Cause | Action |
|---|---|---|---|
| OL | Overload | Input exceeds measurement range | Select higher range or check connections |
| FUSED | Fuse blown | Current path fuse blown | Replace 11A or 440mA fuse |
| BATT | Low battery | Battery below minimum voltage | Replace AA batteries |
| CAL ERR | Calibration error | Internal calibration failed | Return for calibration |
| ERR x | Measurement error | Context-dependent error | Check input signal and connections |
| dBm | dB milliwatt | Reference impedance mode active | Normal for dBm measurements |
| OPEN TC | Open thermocouple | TC probe not connected | Check Type K thermocouple connection |
| SHORT | Short circuit detected | Leads shorted in resistance mode | Check measurement leads |
| HOLD | Reading held | Auto-Hold or Touch Hold active | Press HOLD to release |
| SMOOTH | Averaging mode | Noise filter active | Press SMOOTH to toggle off |
Most Common Fluke 289 Issues
OL - Overload
OL appears when the input voltage, current, or resistance exceeds the selected range. On voltage: maximum input is 1000 VDC / 1000 VAC. On current through A jacks: maximum is 10A (11A momentary). On the mA/uA jack: maximum is 440mA. If OL appears at low ranges, check that leads are in the correct jacks.
FUSED - Fuse Blown
The Fluke 289 has two current fuses. The 10A/600V fuse protects the 10A input. The 440mA/1000V fuse protects the mA input. After a fuse blow, the display shows FUSED. Replace with Fluke-specified fuses (Fluke PN 943260 for 11A, 943261 for 440mA). Never substitute with lower-quality fuses - this is a safety-critical component.
OPEN TC - Open Thermocouple
In temperature mode with a Type K thermocouple, OPEN TC means the thermocouple is not connected or has an open junction. Check the thermocouple lead connection at the Fluke 289 input jack. Verify thermocouple polarity (yellow = positive for Type K).
CAL ERR - Calibration Error
Indicates the internal calibration reference has failed. This is usually caused by battery depletion during calibration, a dropped meter, or age. Return to a Fluke-authorized calibration center.
Parts Commonly Needed
| Part | Notes |
|---|---|
| Fuse 11A/600V | Fluke PN 943260 - use only Fluke fuses |
| Fuse 440mA/1000V | Fluke PN 943261 |
| AA batteries | Alkaline - 6x AA |
| Test leads | Fluke TL175 or TL80A |
| Type K thermocouple | 80BK-A for HVAC temperature measurements |
Need Replacement Parts?
Before ordering, match the replacement part to the model number, electrical rating, and failure symptom. Check current prices on Amazon - prices and availability change frequently.
Pro tip: Fluke 289 has memory logging capability - up to 15,000 time-stamped readings. When troubleshooting intermittent faults, set up logging mode (MIN/MAX/AVG or Event Log) before leaving the site to capture conditions that occur after hours.