TM 10-6630-222-12&P
0004 00
OPERATOR AND UNIT MAINTENANCE MANUAL
(INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST)
FOR WATER QUALITY ANALYSIS SET: PURIFICATION (WQAS-P)
DESCRIPTION AND USE OF CONTROLS AND INDICATORS FOR ULTRAMETER 6P
2.
Refill cell cup with sample.
3.
Press <COND> or <TDS>.
4.
Take reading. A display of [----] indicates an over-range condition from meter setting.
B.
Measuring Resistivity
Resistivity is for low conductivity solutions. In a cell cup the value may drift from trace contaminants or absorption from
atmospheric gasses, so measuring a flowing sample is recommended.
1.
Make sure pH protective cap is secure to avoid contamination.
Hold instrument at 30 angle (cup sloping downward).
2.
3.
Let sample flow continuously into conductivity cell with no aeration.
4.
Press <RES> key, use best reading from sample.
NOTE: If reading is lower than 10 kilo-ohms display will be dashes: [----]. Use Conductivity
C.
Measuring pH
1.
Remove protective cap by squeezing its sides and pulling up.
2.
Rinse sensor well 3 times with sample to be measured. Shake out each sample to remove any
residual liquid.
3.
Refill sensor well with sample.
4.
Press <pH>.
5.
Take reading.
NOTE
After use, fill pH/ORP sensor well with storage solution and replace protective cap. Do not allow pH/ORP sensor to dry
out. If of the above are available use salty tap water. (ref. Cleaning pH/ORP Sensors)
SOLUTION SELECTION
A.
Why Solution Selection is Available
Conductivity, Resistivity, and TDS require temperature correction to 25C (XII). Selection determines the temperature
correction of conductivity and calculation of TDS from compensated conductivity. (ref. Cond. Conversion to TDS).
B.
The 4 Solution Types
On the left side of the display is the salt solution characteristic used to model temperature compensation of conductivity and
its TDS conversion. Generally, using KCL for conductivity, NaCl for resistivity and 442 (Natural water characteristic) for
TDS will reflect present industry practice for standardization. This is the setup as shipped form the factory. (ref. Solution
Characteristics)
The USER selection allows a custom value to be entered for the temperature compensation of conductivity and also the
conversion ratio if measuring TDS.
C.
Calibration of Each Solution Type
0004 00-4
