47

48

10

Battery replacement (shown in Figure 31)

Figure 31

Warning

Guarantee instrument power-off and ensure that testing pen is not connected to any measured 
circuit before replacing battery and opening rear cover of instrument to avoid electric shock. Be 
sure that rear cover has been tightened or not before using instrument. Only battery of the same 
model or electric dimension can be replaced.

 symbol shows on LCD means that load voltage of battery is less than the minimum 

voltage to guarantee measurement tolerance limit and instrument will prompt battery 
replacement. Please replace battery according to following steps:

(1)  Cut off testing circuit for testing pen, press POWER key for power-off and remove testing 
       pen from input jack.
(2)  Open cell cover of instrument and remove old battery and replace 4 new batteries of 1.5V. 
       Please pay attention to polarity of anode and cathode. New and old batteries also cannot 
       be mixed.
(3)   Inset the cell cover;

11

 Maintenance

 (1)  Cleaning shell: Please clean the surface by dipping soft cloth or sponge by clean water.
 (2)  It is strictly prohibited to dip instrument into water to avoid damage of testing instrument.
 (3)  Please dry and store instruments if they are wet.
 (4)  Please submit instruments to qualified repair personnel or designated repair department 
       for calibration or repair if required.

UT241/242/243 OPERATING MANUAL 

UT241/242/243 OPERATING MANUAL