Company name: Beijing Fengyu Huayuan Instrument And Meter Co., Ltd
24-hour service Tel: 13910924471
Tel: 010-65264544
Holiday duty Tel.: 13910924471
QQ：99133400
Company address: No. 20, Shengshun street, Daxing District, Beijing
Postal Code: 100078
Email: yufenghuayuan@126.com
website: http://www.longog.com
Contact: Mr. Zhang
Performance characteristics: automatic range adjustment of measuring voltage, current, resistance, frequency, capacitance and other functions; data retention function keeps the read data in fuzzy points or difficult to reach positions; low battery indicator; used to measure continuous conduction Integrated built-in buzzer; all-round safety design, no metal parts exposed. Shielded banana plugs and recessed internal terminals; The resistance function is an ideal choice for detecting the continuity of relays, transformers and motor coils.
Technical index：
| ST-3900CL automatic range | 3902CL auto range | 3904CL auto range | |
| Alternating current | 400/2000A ±(2.0% of reading + 4 digits) |
200/2000A ±(2.0% of reading + 4 digits) |
400/2000A ±(2.0% of reading + 4 digits) |
| AC voltage | 400(mV)/4/40/400/600V ±(1.0% of reading + 3 digits) 40-500Hz |
200(mV)/2/20/200/600V ±(1.5% of reading + 3 digits) 40-500Hz |
400(mV)/4/40/400/600V ±(1.0% of reading + 3 digits) 40-500Hz |
| DC | 400/2000A ±(2.0% of reading + 4 digits) |
200/2000A ±(2.0% of reading + 4 digits) |
400/2000A ±(2.0% of reading + 4 digits) |
| DC voltage | 400(mV)/4/40/400/600V ±(0.75% of reading + 2 digits) |
200(mV)/2/20/200/600V ±(1% of reading + 2 digits) |
400(mV)/4/40/400/600V ±(0.75% of reading + 2 digits) |
| Resistance | 4/40/400Ω/400KΩ/40MΩ ±(1.5% of reading + 3 digits) |
2/20/200Ω/200KΩ/20MΩ ±(1.5% of reading + 3 digits) |
4/40/400Ω/400KΩ/40MΩ ±(1.5% of reading + 3 digits) |
| Frequency | 4/40/4000HZ/400KHZ/40MHZ (1.0% reading + 2 digits) |
2/20/2000HZ/200KHZ/20MHZ (1.0% reading + 2 digits) |
4/40/4000HZ/400KHZ/40MHZ (1.0% reading + 2 digits) |
| Capacitance | -------- | 2/20/200nF/2/20/200μF /2mF (3% reading + 5 digits) |
4/40/400nF/4/40/400μF /4mF (3% reading + 5 digits) |
| Analog scale display | Have | nothing | nothing |
| LCD screen displays its | 3 3/4 digits (maximum display 3999) | 3 1/2 digits (maximum display 1999) | 3 3/4 digits (maximum display 3999) |
| Automatic shift | Have | Have | Have |
| Reading lock | Have | Have | Have |
| Insufficient power display | Have | Have | Have |
| Automatic shut-down | Have | Have | Have |
| Maximum and minimum lock | Have | Have | Have |
| Auto-zero | Have | Have | Have |
| Peak lock | Have | Have | Have |
| CT size | Up to 55mm | Up to 55mm | Up to 55mm |
| Weight | About 520 grams (including batteries) | About 510 grams (including batteries) | About 510 grams (including batteries) |
| Operating environment | -10 degrees to 50 degrees | -10 degrees to 50 degrees | -10 degrees to 50 degrees |
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