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Daily maintenance and troubleshooting
Keep the instrument dry
If the instrument is wet, please wipe it until it’s dry. If you are not sure whether it’s dry, please do not use it.
Use and store the instrument in ambient temperature
Extreme ambient temperature will reduce the service life of electric components, deform plastic parts or even
cause non-availability for use of the instrument.
Handle the instrument with care
Fall may cause damage to liquid crystal display, electric components or housing.
Keep the instrument clean
Use a piece of wet cloth dipped with a little of detergent to wipe the housing of the instrument often. Do not use
rough objects, chemical solutions or alcohol etc.
Replacement of protective tube
1. Remove the probe from test point and shut down the power.
2. Loosen the fixing screw and take off the back cover. The protective tube is at the back side of the test socket.
3. Take out the burnt protective tube and replace it with a new one of the same specification: for 500mA current,
the 500mA /250V fuse type protective tube is used; for 10A current, the 10A/250V fuse type protective tube is
used.
4. Put back the back cover and fixed it with screws.
Repair and maintenance of the instrument
1. This is a precision instrument. Without the authorization of the products center of the company, please do not
alter any circuit, replace any component or perform any calibration or repair of the product.