SSEYL TH2821 Handheld LCD Delta/Delta percentage display Digital 41KHz LCR Meter TH2821 - - Amazon.com.Chinese and English language user interface selectable Internal, Manual, External and Bus C. TH2821/TH2821A/TH2821B Portable LCR Meter. Features. TH2821,TH2822 Series. TH26011AS. Four-terminal Kelvin test cable. Operating frequency: 5Hz to 100kHz. Lead length: 0.8m. Maximum DC bias:. TH2821A OPERATION MANUAL. 5. Notes on Use. ○ This meter is only for indoor use. ○ Turn off the TH2821A while switching the power supply. TH2821B OPERATION MANUAL. 5. Notes on Use. ○ This meter is only for indoor use. ○ Turn off the TH2821B while switching the power supply. After some screwups due to a discharged internal battery and not reading the instructions, it is starting to give some really impressive View and Download Tonghui TH2821A operation manual online. Portable LCR Meter. TH2821A measuring instruments pdf manual download. TH2821A. It is listed as an accessory on page 4 of the Operator's Manual: "aidetek.com/New_products_info/Datasheet/tonghui/2821A.pdf"