Summary of Contents for LG DM-311
- Page 1 Adjustment and Test procedure Manual for digital multimeter Model : DM-311 LG Precision Co., Ltd 1999/8/12...
- Page 2 Adjustment and test procedure Manual DM-311 Revision History Modification ECN NO Date Name Version 1.0 Page 2 of 12 99-08-26 LG Precision Co., Ltd.
- Page 3 Used for selecting mode and range Fig 1 - Front View of DM-311 Note Adjustment and Test of DM-311 should be conducted under proper test environment Check temperature and relative humidity before adjustment and test. Accuracy guaranteed temperature : 23ºC ± 5ºC (Below 80% RH) Version 1.0...
- Page 4 DC Power Supply or 9V Battery Calibration Procedure 1. Power On Test Set DM-311 to any mode by using Rotary S/W. Check LCD display is turned on. 2. LCD Display Test Check LCD Display to each range by selecting range with Rotary S/W. Below chart shows correct display...
- Page 5 5.Test 5-1 No Input on DC Voltage Mode Specification : ±00.1 Set Rotary S/W to DC Voltage mode and check DM-311 to meet the above specification. 5-2 Short-circuit on DC Voltage Mode Specification : ±00.1 Set Rotary S/W to DC Voltage mode and Short-circuit between COM terminal and V terminal Check DM-311 to meet the above specification.
- Page 6 DC 200mΑ 190mΑ Apply below DC current to to terminal COM and terminal 10A with a calibrator. Customer Factory Range Test DC Current Specification Specification ±(1.5%+2dgt) ±(1.4%+2dgt) DC 10A Version 1.0 Page 6 of 12 99-08-26 LG Precision Co., Ltd.
- Page 7 V to each range with decade resistor. Check the measurement value to each range Customer Factory Test Resistance Range Specification Specification value ±(0.5%+4dgt) ±(0.4%+4dgt) 200Ω 190Ω 2kΩ 1.9kΩ 20kΩ 19kΩ ±(0.5%+1dgt) ±(0.4%+1dgt) 200kΩ 190kΩ 2MΩ 1.9MΩ ±(1.0%+1dgt) ±(0.9%+1dgt) 20MΩ 10MΩ Version 1.0 Page 7 of 12 99-08-26 LG Precision Co., Ltd.
- Page 8 7.5mA 5-10 Short-circuit ohm Test Set Rotary S/W to Resistance measure mode and short-circuit between terminal COM and terminal V Customer Range Factory Specification Specification 200Ω Less than 0.4Ω Version 1.0 Page 8 of 12 99-08-26 LG Precision Co., Ltd.
- Page 9 SHIELD SPRING DMM 384-017-1 HOLDER BAT SNAP 9V UL 418-100 FILM VINYL PPI255 W=65.0 DMM M 513-556R3 PCB BARE B/D DM-311 PCB REV 3 563-063-2 FUSE 250V 0.25A 50F UL&EU 563-065 FUSE 250V 10A H216010 ULE14080 563-068 FUSE 125V 1A 22NM MICRO 101L...
- Page 10 M.F 47 KOHM 1/8W 1% (3216) RMAH4702J RESISTOR M.F 47 KOHM 1/8W 5% (3216) RMAH4702J RESISTOR M.F 47 KOHM 1/8W 5% (3216) RMAH4703J RESISTOR M.F 470 KOHM 1/8W 5% (3216) Version 1.0 Page 10 of 12 99-08-26 LG Precision Co., Ltd.
- Page 11 M.F 8.2 KOHM 1/8W 1% (3216) RMAH9103J RESISTOR M.F 910 KOHM 1/8W 5% (3216) RMBP9000D RESISTOR M.F 900 -OHM 1/4W .5% RMBP90R0D RESISTOR M.F 90 -OHM 1/4W .5% RMBP9R00D RESISTOR 9 -OHM 1/4W .5% Version 1.0 Page 11 of 12 99-08-26 LG Precision Co., Ltd.
- Page 12 Adjustment and test procedure Manual DM-311 Appendix B) Schematic Diagram of DM-311 Version 1.0 Page 12 of 12 99-08-26 LG Precision Co., Ltd.