PASCO EZ-2338 Total Hardness ezSample Field Titrator - Manual

1
012-10114
Total Hardness ezSample
™ Field Titrator
(EZ-2338)
20–200 ppm (mg/L) CaCO
3
Safety Information
Read the MSDS before performing this test procedure. Wear safety glasses and disposable gloves.
Sample Pretreatment
If the sample is turbid, it must be filtered prior to performing this test procedure.
Test Procedure
1. Fill the sample cup to the 25 mL mark
with the sample (Figure 1).
2. Gently snap the tip of the ezSample
Snap Vial (ampoule) at the black snap
ring (Figure 2).
NOTE: When the tip is snapped, the flexible
tubing will remain in place on the tapered
neck of the ampoule.
3. Lift the control bar and insert the
ampoule assembly into the titrator
(Figure 3).
NOTE: The rigid sample pipe will extend
approximately 1.5 inches beyond the body of
the titrator.
4. Hold the titrator with the sample pipe
in the sample and press the control bar
firmly, but briefly, to pull in a small
amount of sample (Figure 4). The
contents will turn a BLUE color.
NOTE: NEVER press the control bar unless the sample pipe is immersed in the
sample.
5. With the sample pipe in the sample, press the control bar again
briefly to allow another small amount of sample to be drawn into the
ampoule.
6. After each addition, rock the entire assembly to mix the contents of
the ampoule. Watch for a color change from BLUE to
PINK .
7. Repeat steps 6 and 7 until a permanent color change occurs.
8. When the color of the liquid in the ampoule changes to PINK,
remove the ampoule from the Titrator. Hold the ampoule in a vertical
position and read the scale opposite the liquid level (Figure 5).
NOTE: Divide ppm calcium carbonate by 17.16 to convert results to grains per gallon.
Figure 3 Figure 4
Figure 5
Figure 2 Figure 1