42L20（白色）板表，电流表，电压表，频率表

名称                                    常用规格                                   备注

交流电流表   a                      0.5-50a                                  直接接通
                  a                     10/5a-800/5a                          经电流互感器通次级电流
                  k                     1ka-10ka                                经电流互感器通次级电流
交流电压表   v                     10v-600v                                直接接通
                  kv                   1kv-35kv                                经电流互感器通次级电流 100v

直流电流表   μa，ma           50μa-500μa 1ma-500ma        直接接通
                  a                     1a-15a                                    直接接通
                  a                     15a-750a                                外附分流器75mv
                  ka                   1ka-3ka                                  外附分流器75mv
直流电压表   v                     3v-600v                                  直接接通
                  kv                   1kv-3kv                                  外附定值电阻

频率表         hz                   45-55hz 36v 100v                  2.5级
                                         127v 220v 380v
功率表         w、var           100v 380v 380-380kv            经电压互感器二次电压100v                                           
                                          5a-5-10ka/5a
功率因数表  cosφ                cos φ =0.5-1-0.5 100v          2.5级
                                          5a 220v/5a 380/5a

本产品的类型是指针式电流测量仪表，品牌是1HENG，型号是42L20（白色）板表，测量范围是0.5-50A（A），准确度是0.5-0.2S