10.14 Measurement Networks
270
Network B1 is a measurement network for medical electrical equipment.
Network B1 complies with the following standards :
(1) Medical electrical equipment - Part 1 :
General requirements for safety
(JIS T 0601-1:1999)
When network B1 is selected, the instrument can also be used in compliance
with the following standards on testing leakage current :
(2) JIS standards for medical X-ray equipment
The instrument can be used for testing leakage current in isolation transformers
in compliance with the safety standard for electrical facilities for hospitals (JIS
T1022 : 96).
In addition to medical electrical equipment standards, many JIS standards spec-
ify the use of a network with 1 k non-inductive resistance for testing leakage
current.
Network B1 (for JIS T 0601-1:1999)
Ｖ
1 k
± 1%
10 k ± 1%
0.015 F
± 2%
Ｖ
1 k ± 1%
Network with a frequency
characteristic (ON)
Network with 1 k non-inductive
resistance only (OFF)
Applicable standards Medical electrical equipment - Part 1 : General requirements for safety
IEC 60601-1:1988-12 +A1:1991-11 +A2:1995-03
General safety regulations for medical electrical equipment (JIS T 1001-92)
General regulations for method of testing safety of medical electrical equipment
(JIS T 1002-92)
Measurement circuit
configuration
Basic measurement element: 1 k
Frequency characteristic: ±0.5% (DC to 1 MHz)
Low-pass filter function Filter configuration (ON setting) : RC filter (10 k + 15 nF)
Filter setting : ON/OFF (1 k only at OFF)
(with short-circuited input protective fuse)
Element tolerance Resistance : ± 1%
Capacitor : ± 2%
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