Adjustment Of Dc Voltage, Ac Voltage And Dc Current; No Input On Dc Voltage Mode; Short-Circuit On Dc Voltage Mode; Dc Voltage Measurement Test - LG DM-311 Adjustment And Test Procedure Manual

Adjustment and test procedure Manual

4. Adjustment of DC voltage, AC voltage and DC current.

Specification

Item
DC
Voltage
AC
Voltage
DC
Current
5.Test

5-1 No Input on DC Voltage Mode

n Specification : ±00.1
n
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

n Specification : ±00.1
n
Set Rotary S/W to DC Voltage mode and Short-circuit between COM terminal and V terminal
n
Check DM-311 to meet the above specification.

5-3 DC Voltage Measurement Test

Set Rotary S/W to DC Voltage Mode and Apply below voltage to terminal COM and terminal V to each
range with a calibrator
Version 1.0
LG Precision Co., Ltd.
1. Set Rotary S/W to DC Voltage Mode
189.8mV ~ 2. Apply DC 190mV to Terminal COM and Terminal V of DM-311 with
190.2mV a calibrator
3. Adjust VR1 to be displayed 190.0mV on LCD display
1. Set Rotary S/W to AC Voltage Mode
189.5mV ~ 2. Apply AC 190mV/60Hz to Terminal COM and Terminal V of DM-311 with
190.5mV a calibrator
3. Adjust VR2 to be displayed 190.0mV on LCD display
1. Set Rotary S/W to DC Current 10A Mode
9.95A ~ 2. Apply DC 10A current to terminal COM and terminal 10A of DM-311
10.05 A with a calibrator
3. Adjust Mn Wire(R39) with ripper to be displayed 10.00A on LCD display.
Customer
Range
Specification
DC 200mV
DC 2V
±(0.5% + 1dgt)
DC 20V
DC 200V
DC 1000V
Procedure
Factory
Specification
±(0.4% + 1dgt)
Page 5 of 12
DM-311
Test DC
Voltage
190mV
1.9V
19V
190V
1000V
99-08-26