Hioki 3155-01, Instruction Manual

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9.2 Measuring Mode Specifications
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9.2.1 Leakage Current Measurement
Measurement method A current value is calculated and displayed by measuring the voltage
drop across a simulated human body resistance (measurement network).
A/D conversion format Sigma-delta format
Display update rate 5 times/second (moving average display)
Maximum value hold Maximum leakage current value and power source condition
Permissible measured
current 25 mAAC/DC
Permissible common mode
voltage (When using the measurement terminals T1 and T2)
250 VDC+AC peak (for ranges other than 50
μ A)
20 VDC+AC peak (for the 50 μ A range)
Measured currents Earth leakage current
Enclosure leakage current
Patient leakage current
*
1
Patient leakage current *
1,
*
2
Patient leakage current *
1,
*
2
Patient auxiliary current*
1
(*
1
: measurable only when using the 9497 NETWORK B)
(*
2
: measurable when using the external power source such as the
9196 APPLY UNIT)
Power source polarity setting Normal polarity / reverse polarity
Single fault condition setting Open power lead / open ground
Measurement method setting Manual / automatic (for a period from 1 to 99 seconds)
Measuring mode AC / DC / AC+DC / AC peak
(Peak measurement can be made only when using the 9498 NETWORK
C or the 9499 NETWORK D.)
Measurement range 25 mA /5 mA / 500 μ A / 50 μ A
Range switching
Full automatic
Frequency characteristics
DC to 1 MHz (DC, AC+DC) / 7 Hz (-3 dB) to 1 MHz (AC)
Temparature coefficient
±
(0.04% rdg.+0.5 dgt.)/
℃
Input resistance Measurement terminals T1 and T2: 1 M Ω± 2% (with no measurement
network installed)
Between measurement terminals T1 and T2: 2 M
Ω± 2% (with no
measurement network installed)
Input capacity terminals T1 and T2)
(with no measurement network installed)
CMRR Between measurement terminals T1 and T2, and frame
(within the permissible common mode voltage)
50
μ A range: 40 dB min. (at 1 MHz)
Ranges other than 50 μ A: 40 dB min. (at 100 kHz)
9.2 Measuring Mode Specifications