Rak283 Blood Pressure Monitor User Manual -

| Parameter | Specification | | :--- | :--- | | Model | RAK283 | | Measurement Method | Oscillometric | | Pressure Range | 20–280 mmHg | | Pulse Range | 40–199 beats/min | | Accuracy (Pressure) | ±3 mmHg | | Accuracy (Pulse) | ±5% of reading | | Inflation | Automatic electric pump | | Deflation | Automatic pressure release valve | | Power | 4 x AAA batteries (6V DC) | | Battery Life | ~300 measurements | | Auto-off | 60 seconds idle | | Operating Environment | 10–40°C, 15–90% RH | | Storage Environment | -20–55°C, 10–93% RH | | Weight (main unit) | Approx. 260g (without batteries) | | Dimensions | 145 x 105 x 55 mm | | Cuff size (included) | 22–42 cm (9–16.5 inches) | | Protection class | Internally powered, Type BF applied part |

| Error Code | Cause | Solution | | :--- | :--- | :--- | | | Cuff not tight enough or air leak | Rewrap cuff; check tube connection. | | E2 | Movement or talking during measurement | Repeat test in silence, remain still. | | E3 | Inflation pressure too high (>300 mmHg) | Press Stop; wait 30 sec; restart. | | E4 | Deflation too slow | Check for kinked air hose. | | E5 | Systolic > Diastolic (invalid data) | Rest for 15 min; measure again. | | EE | Device error | Remove batteries for 1 min; reinsert. | | Low Battery icon | Low power | Replace all 4 batteries. | rak283 blood pressure monitor user manual

If you feel unusual pain or pressure during inflation, press START/STOP immediately to release cuff pressure. | Parameter | Specification | | :--- |

Requires DC 6V, typically provided by 4 x AA batteries. (Note: Some variants may use 4 x AAA batteries). | | E3 | Inflation pressure too high

The top number represents pressure when the heart beats.