Data Delete; Leakage Current, Current And Voltage Measurements - UNI-T UT253A Operating Manual

6. Data Delete

Press CLEAR button to select data clearing option under data access
mode, then use Left or Right button to move the cursor for selecting
YES or NO , finally press MENU button to confirm the operation or
return to the measuring mode.

7. Leakage Current, Current and Voltage Measurements

Dangerous Voltage! To avoid personal injury or accidents in case of
electric shock, only trained and authorized staff is allowed to operate
and must strictly observe safety rules
Danger! To avoid any damage to the meter or personal injury in
case of electric shock do not measure voltage above 600V
Please Keep the jaw properly open or close when measuring
leakage current or current.
Try to place the conductor at the center of the jaw
14
Please keep the jaw clean and regularly maintained after finishing
measurement.
Ensure correct wire connection to avoid short-circuit problem during
voltage measurement
Disconnect test leads with measured lines before pulling them out
of the meter in case of electric shock
Clamping live and neutral wires is to measure leakage current of
electric instruments(2 wires needed)
Clamping the ground wire is to measure its leakage current (single
wire needed)
Clamping all three phases and four wires is to measure total
leakage current(four wires needed)
Clamping the main wire is to measure current of the main circuit
(single wire needed).
15