LaMotte Tracer Total Chlorine Meter User Manual

Page 11

3. Pipet exactly 1.00 mL of the 100 ppm solution into a third 100 mL

volumetric flask. Dilute to the 100 mL line with deionized water. Cap
and mix. This standard is 1 ppm.

4. Add 5 TRACER TCl Tablets (7044A) to the flask of 1 ppm standard

from Step 3. Cap and mix until the tablets disintegrate. The tablets
contain a small amount of insoluble material and will not dissolve
completely. This standard is 1 ppm Converted Chlorine.

Procedure
1. Mix the 1 ppm Converted Chlorine standard.
2. Fill a sample cup with 20 ml of newly prepared 1 ppm Converted

Chlorine standard. Tightly cap the standard immediately after use.

3. Turn the TRACER on. Wait 3 seconds for auto-calibration (circuit’s

not electrode). Immediately immerse in the standard.

4. Stir the standard with the TRACER for 10 seconds. Stop stirring. The

standard and the TRACER must remain still and stable during
measurement.

5. The display will flash while readings are changing rapidly. The result

should be read when the display stabilizes. The reading will be held
and the HOLD annunciator will come on after 120 seconds.

6. Remove the TRACER from the standard. Rinse in deionized water

and shake dry.

7. Repeat steps 2 - 6 three more times on the same sample cup of

standard.

8. After the fourth time, press and hold the CAL key. While continuing

to hold the CAL key, press the MODE key. Immediately release both
keys. The main display should flash

1.00

is not displayed, keep the electrode in standard and press the

CAL key again until

CAL

is displayed, then press the CAL and MODE

keys again simultaneously. Immediately release both keys.

9. After approximately 5 to 7 seconds the display will briefly flash

END

Rinse the TRACER in deionized water and shake dry.

Notes
1. The 1 ppm Converted Chlorine standard should be at room

temperature (23

±2°C) during the validation procedure.

2. The 10,000 ppm Standard Solution can be stored for up to one year in

a tightly sealed, amber, glass bottle.

3. The 10 ppm Standard Solution can be stored for up thirty days in a

tightly sealed, amber, glass bottle.

4. The 1 ppm Converted Chlorine Standard is stable for up to

approximately 30 minutes. Discard the standard after use.