simpson的中文名是辛普森,产自美国,他们主要是做泄露电流测试仪、电流表、电压表、万用表等，他们生产质量的表畅销全球，其中simpson型号里的的228和229-2的型号已写入标准，还被IEC电工委员会为比对的产品，在中国大陆的已有大部分实验室，检测机构都用到simpson228和simpson229-2了，常用的型号我们一般都备有现货
常有些人会问，simpson228和simpson229-2的区别在哪里？simpson228是交直流泄漏电流表,simpson229-2就是交流泄漏电流表。可以根据您的实际情况来选型。
Simpson228概述：
Simpson228 AC/DC泄漏电流表产品简介
Simpson228 AC/DC泄漏电流表主要测试AC/DC泄漏电流，设计符合*新的UL、IEC和ANSI规格。Simpson228查出当前AC和DC漏出并且模仿人的反应在三个不同水平 －－ 反应，放弃，以及灼伤危险。每个Simpson228具有弹簧夹、指南和电池以及测试笔。
◆查出危险AC & DC 泄漏电流在电子或电子设备导电性表面
◆设计遇见新的IEC、ANSI和UL指南
◆反应，放弃和无重负的烧伤危险网络测量
◆电池操作为轻便
simpson228详细参数
Opecifications GENERAL
Reaction
ResponseNetwork
Let-Go
ResponseNetwork
UnweightedBurnHazard
Response Network
Equivalent network component values:
Complies with values specified in IEC 990 (excluding fuse)
Equivalent measuring instrument load:
1 MΩ- 10pF
1 MΩ- 62 pF
1 MΩ- 1 pF
Ranges:
0.3, 1, 3, 10 M.I.U.
0.3, 1, 3, 10 M.I.U.
0-100 mA RMS
Current accuracy:
±2% F.S. @ 60 Hz
Meter measurement method:
True RMS
Meter frequency response:
(Relative to ANSI C101-1992 or UL-1459 2nd edition)
DC to 1 Hz
Pointer shall track within 5% of peak
2Hz to 19Hz (Accuracy not supported)
20 Hz to 200 KHz
±2% F.S.
±2.5% of F.S.
±2% F.S.
200 KHz to 1 MHz
±2% F.S.
±2.5% F.S.
±5% F.S.
Output sensitivity:
Full scale meter indication equals 1V RMS (Measured with a 1 MΩ- 12 pF load)
Output accuracy:
±2% of reading @ 60 Hz
Output frequency response:
(Relative to ANSI C101-1992 or UL-1459 2nd edition)
DC to 50Hz
±2% of reading
50 Hz to 100 KHz
±2.5% of reading
±2% /-3% of reading
±2% of reading
100 kHz to 1 MHz
±5% of reading
Voltmeter range:
0-300 V (AC or DC)
Voltmeter accuracy: DC to 1 Hz
Pointer shall track within 5% of peak
2Hz to 19Hz (Accuracy not supported)
20 Hz to 1KHz
±3% F.S. @ 60 Hz (Add ±1% for every additional 100Hz)
Voltmeter frequency response:
DC to 1 KHz
Power requirements:
Power requirements: (2) 9V (NEDA 1604A) batteries
Physical:
7¨ x 5.25¨ x 3.125¨, 2-1/2 lbs (1.4kg), ABS plastic,fusedinput
Environmental:
27°C ±2° C, 70% non condensing relative humidity. Outside thisrangederate by 10% per °C
Maximum operating range:
0° to 40° C