TM 10-4610-310-14
0005 00
SOURCE WATER TURBIDITY MEASUREMENT - continued
10. Press the READ key and the LCD will display a blinking "S IP" (Sampling in Process). The turbidity value will
appear after approximately 25 seconds.
11. Record the information on a copy of the Data Sheet. See Appendix A.
12. Coagulant will be needed if the source water is greater than 150 NTUs (FTUs). See WP 0010 00.
13. If source water is suspect of containing chlorine, a test for chlorine content must be performed. Use chlorine
strips from the BII box to analyze the source water. See WP 0021 00.
CONDUCTIVITY METER (ULTRAMETER)
This work package contains information and operating instructions for the Ultrameter Model 6P portable, water
quality monitor instrument. The instrument is used in the field as a hand-held, microprocessor-based, battery
operated unit to determine the quality of raw water source and product water. The instrument measures
alkalinity (pH) or Total Dissolved Solids (TDS).
1. TDS require mathematical correction to77F (25C) values. On the left of the instrument's Liquid Crystal
Display (LCD) is an indicator of the salt solution characteristic used to model temperature compensation of
conductivity and its TDS conversion. See Figure 4.
Figure 4. Conductivity Meter Liquid Crystal Display.
2. Selection affects the calculation of TDS from compensated conductivity. The selection can affect the
reported conductivity of hot or cold solutions, and will change the reported TDS of a solution. Generally,
using NaCI for TDS will reflect present industry practice for standardization.
3. Rinse the pH/ORP sensor well with test solution three times and refill.
4. Press the desired measurement key to start measurements. All functions are performed one key at a time.
5. Pressing the key again does no harm and restarts the 15-second OFF timer. After 15 seconds of inactivity
the instrument automatically turns off; 60 seconds in CAL mode.
6. The meter is housed in a rugged and lightweight case with easy to read LCD. The keypad is water-resistant
and can be wiped with a moist cloth for cleanup. Do not use solvents.
Measurement Key Operation
The measurement keys (TDS or pH) in the keypad turns on the instrument in the mode selected. The mode
appears at the bottom of the LCD. The measurement units appear at the right of the LCD. Pressing a
measurement key does this even if you are in a calibration sequence and it also serves to abandon a change.
See Figure 5.
