TM 09241 B-12&P
2-10. OPERATION OF TURBIDITY TEST SET. - continued I
d Test for turbidity.
The turbidity meter is equipped with an auto shutoff feature that will activate after meter is idle for 8
minutes. No settings will be lost if this happens and pressing the ON-OFF keypad will turn the meter back
on. If power has been disconnected from meter or ON-OFF switch, located on top of meter, has been
turned OFF, calibration will have to be repeated prior to testing.
If the meter does not function per the following procedures, see troubleshooting.
(1) Press ON-OFF keypad (1) to turn on the meter. Allow the display to stabilize for 3 to 5 minutes.
Immerse probe into solutions at an angle to avoid trapping air bubbles under tip which would affect
readings. Cone assembly must be completely immersed.
(2) Fill beaker (2) to a depth of at least 3 in. (7.6 cm) with water to be tested and completely immerse probe
(3) tip and cone assembly (4).
Figure 2-10. Turbidity Test