Hach POCKET COLORIMETER II Instruction Manual

1—34
Chlorine, Free and Total, LR, continued
Interferences
Interfering
Substance
Interference Levels and Treatments
Acidity Greater than 150 mg/L CaCO
3
. May not develop full
color or color may fade instantly. Neutralize to pH 6–7
with 1 N Sodium Hydroxide. Determine amount to be
added on a separate 10-mL sample, then add the same
amount to the sample being tested. Correct for the
additional volume.
Alkalinity Greater than 250 mg/L CaCO
3
. May not develop full
color or color may fade instantly. Neutralize to pH 6–7
with 1 N Sulfuric Acid. Determine amount to be added
on a separate 10-mL sample, then add the same
amount to the sample being tested. Correct for the
additional volume.
Bromine, Br
2
Interferes at all levels
5957088.book Page 34 Friday, March 22, 2013 3:54 PM

Hach POCKET COLORIMETER II Specifications

General

Measurement Method	Colorimetric
Display	LCD
Operating Temperature	0 to 50 °C
Storage Temperature	-40 to 60 °C
Waterproof Rating	IP67
Weight	0.23 kg
Light Source	LED
Range	Varies by parameter
Wavelength	Varies by parameter
Battery Life	Approximately 2000 tests