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General| Diode Test | Yes |
|---|---|
| Continuity Test | Yes |
| Battery | 9V |
| DC Voltage Ranges | 200mV, 2V, 20V, 200V |
| AC Voltage Ranges | 200V |
| DC Current Ranges | 200µA, 2mA, 20mA, 200mA, 10A |
| Resistance Ranges | 200Ω, 2kΩ, 20kΩ, 200kΩ, 2MΩ |
| Display | 3.5 digit LCD |
Used for measuring DC/AC current below 10A current.
Used for common terminal.
Used for AC/DC voltage or resistance measure terminal.
Used for measuring DC/AC current below 200mA current.
Used for selecting mode and range.
Set DM-311 to any mode and check LCD display is turned on.
Check LCD display to each range by selecting range with Rotary S/W.
Check for 'BATT' message on LCD when battery voltage goes under 6.4V.
Set to DC Voltage Mode, apply 190mV, adjust VR1 for 190.0mV display.
Set to AC Voltage Mode, apply 190mV, adjust VR2 for 190.0mV display.
Set to DC Current 10A Mode, apply 10A, adjust Mn Wire (R39) for 10.00A display.
Check DM-311 meets specification ±00.1 in DC Voltage mode.
Short-circuit COM and V terminals in DC Voltage mode, check specification ±00.1.
Set to DC Voltage Mode, apply specified voltages to COM and V terminals for each range.
Apply diode to COM/V in forward direction, check forward/reverse specifications.
Short COM/V terminals. Buzzer sounds if measurement < 200 Ω.
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