Nihon Kohden Corporation ZM-520PA Benutzerhandbuch

Operator’s Manual  ZM-520PA/521PA/530PA/531PA

 91

Heart rate counting range: 

0, 15 to 300 beats/min

Heart rate counting accuracy*: 

±2 beats/min, (0, 15 to 300 beats/min)

* Essential performance of this transmitter

Measuring method: 

Impedance method

Measuring lead: 

Between R and F

Impedance range: 

220 to 2000 Ω

Excitor current: 

54 to 93 μAp-p, 48 kHz

Respiration rate measuring accuracy*:  ±2 counts/min (at 0 to 150 counts/min)
Respiration rate counting range: 

0 to 150 counts/min

* Essential performance of this transmitter

Measuring range: 

0 to 100%SpO

2

 

Declared range: 

70 to 100%SpO

2

Minimum display range: 

1%SpO

2

Display update cycle: 

Every 3 seconds

Measuring accuracy (rms)*: 

Accuracy assurance temperature: 18 to 40ºC

Total accuracy including probe: 

80%SpO

2

 ≤ %SpO

2

 ≤ 100%SpO

2

: ±2%SpO

2

 

 70%SpO

2

 ≤ %SpO

2

 < 80%SpO

2

: ±3%SpO

2

 

 under 

70%SpO

2

: not specified

Accuracy of the transmitter: 

80%SpO

2

 ≤ %SpO

2

 ≤ 100%SpO

2

: ±1%SpO

2

 

 50%SpO

2

 ≤ %SpO

2

 < 80%SpO

2

: ±2%SpO

2

 

 under 

50%SpO

2

: not specified

Pulse rate declared range: 

30 to 300 bpm

Pulse rate display range: 

30 to 300 bpm

Pulse rate accuracy (rms)*: 

±3% ±1 bpm

* Essential performance of this transmitter

• The SpO

2

 measuring accuracy was tested using the TL-201T, TL-260T, TL-271T and 

TL-631T SpO

2

 probes. The testing was performed during induced hypoxia on healthy 

volunteers (Ethnicity: 10 Caucasians, 2 Africans, 1 Asian and 3 Indians), (Skin: 8 light, 
4 medium, 4 dark), (Age: 21 to 34), (5 women and 11 men) under the condition of no 
motion. Arterial blood was sampled and measured by a CO-oximeter. The difference 
between SpO

2

 measured by the SpO

2

 probe and functional SaO

2

 measured by a 

CO-oximeter was calculated using the root-mean-square (rms) method according 
to ISO 9919: 2005. This measurement accuracy figure represents 2/3 of all test 
measurements.

•  A pulse oximeter tester that generates simulated signals can be used to check the 

difference from the design specification, but it cannot be used as a replacement for 
human signals for testing accuracy.

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