תיאור
In order to prevent the danger of electric shock, electrical devices use power supplies that are isolated from parts of the device that may come into contact with the body. However, it is impossible to achieve infinite insulation resistance. Some leak current always exists, and its magnitude changes as the insulation degrades over time. The LEAK CURRENT HiTESTER ST5540/ST5541 provides an easy-to-operate solution for measuring leak current in electrical devices, making it eminently suitable for use in an extensive array of applications, ranging from production lines to equipment maintenance and inspections.
Measurement methods
Measurement 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 modes
Leak 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
Leak current measurement
Ground 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 current
Measurement current
DC, AC (true rms, 0.1 Hz to 1 MHz), AC+DC (true rms, 0.1 Hz to 1 MHz), AC peak (15 Hz to 1 MHz)
Measurement ranges
DC / 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 to 100 kHz, typ.)
AC peak measurement: ±2.0% rdg. ±6 dgt. (15 Hz to 10 kHz, typ.)
Interfaces
External I/O, medical device relay output, USB 1.1 (communications), RS-232C
Functionality
110% voltage application, automatic test, data storage for 100 target devices, clock, data backup, printed output (optional), etc.
Power supply
100/120/220/240 V AC (specify at time of order), 50/60 Hz, 30 VA rated power
Target device power supply input
100 to 250 V AC, 50/60 Hz Rated current input from terminal block: 20 A
Target device power supply output
Output from terminal block: 20 A Output from outlet: 15 A
Dimensions and mass
320 mm (12.60 in)W × 110 mm (4.33 in)H × 253 mm (9.96 in)D, 4.5 kg (158.7 oz)
Accessories
Test lead L2200 (for ST5540, Red ×2, Black ×1) ×1 set, Enclosure probe 9195 ×1, Power cord ×3, Spare fuse for measurement line ×1, Instruction manual ×1, CD-ROM ×1