Duty Ratio; Maintenance; General Maintenance; Replacing The Batteries - Mastech MS8301D User Manual

Duty Ratio

Measuring range
Resolution
10%~90%
Through grade HZ/DUTY:
- Frequency response:40~3KHz
- The input voltage range: ≥2V AC RMS (input voltage will
increase when the frequency to be measured increases)
- Maximum input voltage:600V AC RMS

Maintenance

This section provides basic maintenance information,
including instructions for the battery. Do not try to repair
the meter unless you are an experienced maintenance
person with the relevant calibration, performance testing
and maintenance data.

General Maintenance

To avoid injury or damage to the meter, don't wet
the inner parts of the meter. Before opening the
case or battery cover, remove the connecting
cable between the test probe and the input signal.
Regularly clean the meter case with damp cloth and a small
amount of detergent. Do not use abrasives or chemical
solvents. If the input jack becomes dirty or wet, it may
affect the measurement readings.
To clean input socket:
Turn off the meter and pull out all the test probes
1
from the input jack.
Remove all dirt from the jacks.
2
Accuracy
1% ±2%
14
Apply detergent or lubricant to a new cotton ball
3
(such as WD-40).
4
Clean each jack with a cotton ball and lubricant to
prevent contamination by moisture in the socket.

Replacing The Batteries

To avoid electric shock, make sure that the test
leads have been clearly move away from the circuit
under measurement before opening the battery
cover of the meter.
Do not mix old and new batteries. Do not mix
alkaline, standard (carbon-zinc), or rechargeable
(ni-cad, ni-mh, etc) batteries.
If the sign " " appears, it means that the batteries
should be replaced.
Loosen the fixing screw of the battery cover and remove it.
Replace the exhausted batteries with new ones.
Put the battery cover back and fix it again to its origin form.
Note:
Do not reverse the poles of the batteries.

Replace test leads

Replace test leads if leads become damaged or worn.
Use meet EN 61010-031 standard, rated CAT III 600V,
10A or better test leads.
15