TM 09241 B-12&P
2-10. OPERATION OF TURBIDITY TEST SET - continued
ON-OFF switch located on top of turbidity meter should always be left in ON position. Calibration information
stored in meter will be lost if switch is turned OFF.
Check that ON-OFF switch (10) located on top of turbidity meter (5) is in ON position.
Calibrate the meter.
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 the meter does not function per the following procedures, see troubleshooting.
Press ON-OFF keypad (1) to turn on the meter (2). Allow the display to stabilize for 3 to 5 minutes.
Rinse beaker (3) three times with demineralized or distilled water and dry thoroughly.
Empty bottle of 0.5 NTU standard solution (4) into beaker (3).
Figure 2-9. Turbidity Meter Adjustment