TM 10-4610-310-14
0005 00
PREPARATION INSTRUCTIONS
Instructions for conducting these tests using the Hanna HI 93703 turbidity meter and Ultrameter model 6P
conductivity meter are provided in this work package.
1. Remove the turbidity meter and conductivity meter from the test kit storage box in Basic Issue Items (BII)
box.
2. Calibrate the portable microprocessor turbidity meter before use. See WP 0048 00.
3. Calibrate the conductivity meter before use. See WP 0049 00.
TURBIDITY METER OPERATION
The turbidity meter is housed in a rugged and lightweight case with easy to read Liquid Crystal Display (LCD).
The turbidity meter is equipped with an automatic shutoff feature activated after 4 minutes of nonuse. See
Figure 1. All operations are performed with only four keys. A positive locking system ensures that the cuvet
(small glass container) is firmly placed in the cell. The keypad is water-resistant and can be wiped with a moist
cloth for cleanup. The one-point calibration at 10 FTU's is performed using the available standard. The last
calibration date is stored and can be retrieved at the operator's convenience.
MEASUREMENT CELL
ON/OFF KEY
CAL KEY
DATE ⇒ KEY
READ ⇑ KEY
Figure 1. Portable Microprocessor Turbidity Meter
The turbidity meter functions by passing a beam of infrared light through a cuvet containing the sample being
measured. A sensor, positioned at 90 with respect to the direction of light, detects the amount of light scattered
by the undissolved particles present in the sample. The microprocessor converts such readings into FTU values.
1. Install four 1.5V AA batteries. Turn meter on. Press ON/OFF key to ON.
2. Turbidity meter will perform a self-test with a full set of figures. After the test, the LCD will change to the
measurement mode.
3. When the turbidity meter LCD displays " - - - - ", the turbidity meter is ready to measure. See Liquid Crystal
Display and Error Codes.
4. Fill a clean cuvet up to 1/4 inch (0.5 cm) from its rim with the agitated sample.
5. Allow sufficient time for bubbles to escape before securing the cap. Do not over tighten the cap.
6. Wipe the cuvet thoroughly with a lint-free cloth or tissue before inserting into the measurement cell.
7. The cuvet must be completely free of fingerprints and other dirt and oil, particularly in the area where the
light goes through. Approximately bottom 1 inch (2 cm) of the cuvet.
