Hioki ST5540, Instruction Manual, Page: 262 / 326

10.2 Auxiliary measurement functions*
256
10.2 Auxiliary measurement functions*
110% voltage
application
function Equipped with a voltage output terminal (T3) that applies a voltage that is 110% of rated
voltage between the insulated SIP/SOP section, F-type applied part, or patient
connections and ground.
No-load output voltage:
From -0% to +5% of power supply voltage of line input for equipment under test
1 M

resistance load:
Within ± 2% of power supply voltage of line input for equipment under test
Output impedance: 22.5 ± 3 k

(including output protective resistance of 10 k

at 50/60 Hz)
Output ON/OFF selection
(a)Applied when positive phase (to input power supply voltage)
(b)Applied when negative phase (to input power supply voltage)
It is possible to automatically switch between (a) and (b) (automatic testing function)
*
only ST5540
10.3 Measurement System
Measurement
system Indication of a current value calculated based the measured drop in voltage
caused by simulated resistance of the human body
Measurement of true effective value
The measurement section : chassis-grounded and floating
Simulated resistance
of human body
(current detection circuit)
Resistance tolerance of
used elements:
Resistance:±1%
Capacitor: ±3%
Network A For Electrical
Appliance and
Material Safety
Law Basic measurement element :1 k

Filter: 10 k

+ 11.22 nF + 579

Network B1, B2* For medical
electrical
equipment Basic measurement element :1 k

Filter: 10 k

+ 15 nF
Network C For IEC 60990 Basic measurement element :
1.5 k

+ 500

Filter1:10 k

+ 22 nF
Filter2:
10 k

+ (20 k

+ 6.2 nF)//9.1 nF
Network D For UL Basic measurement element :
1.5 k

//0.15

F
Network E General-purpose 1 Basic measurement element1 :1 k

Network F General-purpose 2 Basic measurement element2 :2 k

Network G For IEC 60601-1
For damp
conditions Basic measurement element :
375

//0.22

F + 500

Protective
conductor
current Basic measurement element :35

Measurement procedure Manual
measurement Measure each item while changing the measurement
conditions
Automatic
measurement Automatic measurement of power supply polarity and
equipment status
Measurement time setting
Set the delay (wait time) for state transitions
Measurement terminals Terminal T1, terminal T2 (with built-in fuse holder),
Terminal T3 (110% voltage application terminal)*
*
only ST5540