中國臺灣七泰4位半數字式電表DM-41的產品介紹：

特性

? 4位半顯示（19999）

? 可量測直流電壓（電流），交流電壓（電流），頻率，歐姆等

? 類比信號量測

? 資料可Hold（選購）

? DIN規格 96×48 mm.

詳細規格

Display............. 4 1/2 (19999) 0.56〞(14.2mm), Red LED

Accuracy...................................... DC ±0.03% RD.±2 digit

AC ±0.1% F.S.±2 digit

Hz±0.1% RD.±2 digits

Ohm±0.1%RD.±2 digit

Conversion rate (about).......... 3/sec. (DC), 1/sec. (AC, Hz)

6/sec. (Ohm)

Over input indication...................................... "0000" flash

Polarity.................................................. Only "－" display

Frequency range ....................... 45～400Hz for AC range

Operating temp. .................................................. 0～60℃

Storage temp. .................................................. -10～70℃

Temp. coefficient ...............................................................

..................... ≦100PPM/℃(≦60PPM/℃, 25℃±10℃)

Max. relative humidity .............................................. 95%

Dielectric strength ..... AC 2 KV/1 min. (input/power/case)

Surge test ..............................4 KV/1.2×50μs, IEC 255-4

Aux. power .................. AC 115V/230V ±10%, 50/60 Hz

DC 24V, 48V, 110V, ±20% (option)

Power consumption ........................... AC 3.5VA, DC 3W

Weight (about) ......................................................... 330g