SPI – D141 HANDHELD METER
SPI HSPI
V6 20161007 8
7. Use
7.1 Zero calibration:
• Before every measurement a zero calibration has to be done.
• You take 2 empty, clean cuvettes (Glass test tubes) with the appropriate colour line and
rinse off with the measured water.
• Fill these cuvettes with measurement water (Blanc or control).
• Dry the cuvettes on the outside.
• Place both cuvettes in each channel.
• Activate handheld meter by pushing button “On/Off”
• Select by button “menu” the parameter you want to measure and confirm by pushing
button “enter”
• Display shows a number.
• By pushing button “calib.” you confirm the zero calibration.
• Take care, after zero calibration the number in display has to be 0.00.
If so, the zero calibration is done correct.
• When you have a correct zero calibration you can continue your sample measurements.
7.2 Free available chlorine (Cuvette with red line):
After zero calibration you can continue your sample measurement.
The cuvette for Blanc measurement is left in channel 1 (Reference).
The other cuvette must be empty and fill successively this cuvette with:
- 5 drops “Start”
- 5 drops “DPD 1”
- The cuvette must be filled up to the first line in the cuvette with sampling water.
(First line seen from bottom of cuvette).
- Dry the cuvettes on the outside.
- Put the cuvette into channel 2 (Measuring channel).
Read the value from display within 10 seconds and write value down.
7.3 Total chlorine (Cuvette with yellow line):
• After measuring free chlorine you can start measurement of total chlorine.
• Rinse the cuvette with the yellow line with the measured water.
• Fill the cuvette with the yellow line with:
- 5 drops “Totaal 2”
- Pour just measured solution (Pink) from free available into this cuvette.
- Dry the cuvette on the outside.
- Put the cuvette in channel 2 again.
• Read the value from display within 2 minutes and write value down.
When the “Totaal 2”has a yellowish colour, don’t use them anymore.
Suggestion, wrap the bottle in aluminium foil.
Take care of time, also for this measurement you have to wait for 2 minutes.
Use just 1 cuvette ( Always the same cuvette) to fill with “Totaal 2”. This reagent leave
Potassium Iodide in cuvette what can affect your free available chlorine measurement.