13
11. Troubleshooting Guide
In case of errors, “ _” will appear in the LCD Display, where “_” is a number 1-6. Error messages may
appear if:
• No pulse rate detected ( )
• You speak or move during measurement ( )
• The cuff was not attached correctly or the cuff is fastened too tightly or loosely and measurement
takes longer than 25 seconds ( )
• A system or device error occurs ( )
• Air pressure is higher than 300 mmHg ( )
• Batteries are almost depleted ( )
In such cases, repeat the measurement. Do not move or speak. If necessary, replace the batteries.
12. Specifications
Type
BM 50
Measurement Method
Oscillometric, non-invasive blood pressure measurement on the upper arm
Measurement Range
Cuff Pressure
0 – 300 mmHg
Systolic
50 – 250 mmHg
Diastolic
30 – 200 mmHg
Pulse
30 – 180 beats per minute
Display Accuracy
Pressure
Pulse
± 3 mmHg
± 5%
Dimensions
5.3 in L x 4.0 in W x 2.1 in H (134 mm L x 102 mm W x 53 mm H)
Weight
14.32 oz (406 g) with cuff, without batteries
Cuff Size
8.7 – 16.5 in (22 – 42 cm)
Operating Range
41 – 104 °F (5 – +40 °C), 15 – 90% relative humidity (non-condensing)
Storage Range
-13 – 158 °F (-25 – +70 °C), ≤ 90% relative humidity
Power Supply
4 x 1.5V
AA batteries
Battery Life
Approx. 250 measurements, depending on the blood pressure level and/
or pump pressure
The serial number is located on the device or in the battery compartment. These specifications are subject
to change without notice for purpose of improvement.
• This unit is in line with European Standard EN 60601-1-2 (In accordance with CISPR 11,
IEC 61000-3-2, IEC 61000-3-3, IEC 61000-4-2, IEC 61000-4-3, IEC 61000-4-4, IEC 61000-4-5,
IEC 61000-4-6, IEC 61000-4-8 and IEC 61000-4-11) and is subject to particular precautions with regard
to electromagnetic compatibility (EMC). Please note that portable and mobile HF communication
systems may interfere with this unit.
• This device is in line with the EU Medical Devices Directive 93/42/EEC, the “Medizinproduktegesetz”
(German Medical Devices Act) and the standards EN ISO 81060-1 (non-invasive sphygmomanometers,
Part 1: Requirements and test methods), EN 1060-3 (non-invasive sphygmomanometers, Part 3:
Supplementary requirements for electro-mechanical blood pressure measuring systems) and IEC
80601-2-30 (Medical electrical equipment – Part 2–30: Particular requirements for the safety and
essential performance of automated noninvasive blood pressure monitors).
