Figure 3-15. Total Dissolved Solids (TDS) Meter (Portable) Battery Replacement
3-10. REPLACE SWITCH INDICATOR LAMPS (refer to fig. 3-16).
(1) Unscrew lens cap (1).
(2) Twist bulb (2) to left and push in at the same time using lamp puller in Storage Box No. 2.
Be careful not to lose the cupped gasket washer. Without this gasket, you can
break lens when tightening, and dampness will fog lens.