HIOKI ST5540 and ST5541 Leak Current-Tester

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Benefits of the ST5540/ST5541 Safety Testers

  • Leakage current safety testers for general or medical electrical devices.
  • Comply with laws and standards regarding medical or general electrical equipment.
  • Touch panel, USB 1.1 and RS232C interfaces.

HIOKI ST5540 and ST5541 Leak Current Tester

Leak current measurement is an essential part of electrical safety for medical-use electrical devices (with ST5540) as well as general electrical devices (with ST5541). Electrical safety tests such as insulation resistance, withstand voltage, ground resistance, and leakage current must always be conducted provide safety for the use of electrical products. The HIOKI ST5540 consists of measurement networks that simulate the human body and a high-frequency volt meter, and is also capable of switching power supply polarities and making measurements under simulated single fault conditions in equipment under test. The HIOKI ST5541 provides support for standard-compliant networks (excluding medical-use electrical devices).

  • Leakage current testers, comply with laws and standards regarding medical electrical equipment as well as non-medical electrical equipment.
  • Can be used to measure leakage current in all types of electrical products from computers to medical equipment.
  • Uninterrupted polarity switching function dramatically reduces cycle time.
  • Support for rated currents up to 20 A gives the instrument more than adequate capability for testing products designed to comply with new standards.
  • Touch panel features simple, interactive operation.
  • HIOKI ST5540:
    • Consists of measurement networks that simulate the human body and a high-frequency volt meter, and is also capable of switching power supply polarities and making measurements under simulated single fault conditions in equipment under test.
    • Compliance with IEC 60601-1:2005 Ed 3.0, JIS T 0601-1:2012 for medical-use electrical devices and essential to electrical safety.
    • Compliance with Electrical Appliances and Materials Safety Act, JIS, IEC, and UL standards for general-use electrical devices.
  • HIOKI ST5541:
    • Provides support for standard-compliant networks (excluding medical-use electrical devices).
    • Compliance with Electrical Appliances and Materials Safety Act, JIS/IEC/UL standards.
    • Communications functionality and external I/O support allow automatic testing on production lines.

Model Overview

ModelHIOKI ST5540HIOKI ST5541
Measurement methodsMeasurement of voltage drop across body simulated resistance points,
calculation and display of current values,
true RMS measurement,
measurement unit floats relative to instrument ground
Measurement modesLeak current measurement, voltage measurement, safety conductor current measurement
Standards compliance (NW: Body simulated resistance)NW-A:
Electrical Appliances and Materials Safety Act.

NW-B1:
Medical electrical equipment: IEC 60601-1:1988+ A1:1993+ A2:1995, JIS T 0601-1:1999.

NW-B2:
Medical electrical equipment: IEC 60601-1:2005+ A1:2012, JIS T 0601-1:2012 and complement 1:2014, IEC 62353.

NW-C:
Measurement of touch current and protective conductor current: IEC 60990:2016.
Electrical equipment for measurement, control, and laboratory use: IEC 61010-1:2010+ A1:2016.
Information technology equipment: IEC60950-1:2005+ A1:2009+ A2:2013.
Audio, video and similar electronic apparatus: IEC 60065:2014.
Personnel Protection Systems for EV: UL 2231-1:2012 (Amended 2016), UL-2231-2:2012 (Amended 2016).

NW-D:
For UL: UL 1492:1996 (Amended 2013).

NW-G:
Electrical equipment for measurement, control, and laboratory use; current measurement circuits in damp conditions: IEC 61010-1:2010+ A1:2016.
NW-A:
Electrical Appliances and Materials Safety Act.

NW-C:
Measurement of touch current and protective conductor current: IEC 60990:2016.
Electrical equipment for measurement, control, and laboratory use: IEC 61010-1:2010+ A1:2016.
Information technology equipment: IEC60950-1:2005+ A1:2009+ A2:2013.
Audio, video and similar electronic apparatus: IEC 60065:2014.
Personnel Protection Systems for EV: UL 2231-1:2012 (Amended 2016), UL-2231-2:2012 (Amended 2016).

NW-D:
For UL: UL 1492:1996 (Amended 2013).

NW-G:
Electrical equipment for measurement, control, and laboratory use; current measurement circuits in damp conditions: IEC 61010-1:2010+ A1:2016
Leak current measurementGround leak current, 3 types of contact current, 7 types of patient leak current, patient measurement current, 4 types of total patient leak current, free current measurement, 3 types of enclosure leak currentGround leak current, 3 types of contact current, free current measurement, 3 types of enclosure leak current
Measurement currentDC, AC (true RMS, 0.1 Hz...1 MHz), AC+DC (true RMS, 0.1 Hz...1 MHz), AC peak (15 Hz...1 MHz)DC, AC (true RMS, 15 Hz...1 MHz), AC+DC (true RMS, 15 Hz...1 MHz), AC peak (15 Hz...1 MHz)
Measurement rangesDC/AC/AC+DC mode: 50.00 mA/5.000 mA/500.0 µA/50.00 µA;
AC peak mode: 75.0 mA/10.00 mA/1.000 mA/500.0 µA
Measurement accuracy (current measurement)DC measurement: ±2.0% rdg. ±6 dgt. (typ.);
AC/AC+DC measurement: ±2.0% rdg. ±6 dgt. (15 Hz...100 kHz, typ.);
AC peak measurement: ±2.0% rdg. ±6 dgt. (15 Hz...10 kHz, typ.)
Display320x240 dot matrix LCD (with backlight); control 6x6 matrix touch panel
Interfaces EXT I/O, medical device relay output, USB 1.1 (communications), RS232CEXT I/O, USB 1.1 (communications), RS232C
Functionality110% voltage application, automatic test, data storage for 100 target devices, clock, data backup, printed output (optional), etc.Automatic test, data storage for 100 target devices, clock, data backup, printed output (optional), etc.
Power supply100/120/220/240 VAC (specify at time of order), 50/60 Hz, 30 VA rated power
Target device power supplyInput 100...250 VAC, 50/60 Hz; rated current input from terminal block: 20 A;
output: From terminal block 20 A, from outlet 15 A
Dimensions (mm)320 x 110 x 253; 4.5 kg

Included: HIOKO ST 5540 or 5541, test leads L2200, enclosure probe 9195, 3x power cord, spare fuse for measurement line, instruction manual, CD.


HIOKI ST5540, ST5541 List of Functions

Network
ModelHIOKI ST5540HIOKI ST5541
Network A (Electrical Appliances and Materials Safety Act)
Network B (Medical-use electrical devices)-
Network C (IEC 60990)
Network D (UL)
Network E (General-purpose 1)
Network F (General-purpose 2)
Network G (IEC 61010-1)
List of functions (major functions)
ModelHIOKI ST5540HIOKI ST5541
Power on polarity switching function
Rated current 20 A
Function for checking for blown fuses
Frequency band switching -
110% voltage output terminal (T3 terminal) -
S10, S12, S13, E terminal -
List of functions (testing leakage current mode)
ModelHIOKI ST5540HIOKI ST5541
Earth leakage current
Touch current
Patient auxiliary current-
Patient leakage current-
Total patient leakage current -
Free current
Enclosure - Earth leakage current
Enclosure - Enclosure leakage current
Enclosure - Line leakage current
Patient leakage current I -
Patient leakage current II -
Patient leakage current III -