User Guide

• The instrument directly displays concentration in mg/L of ammonia

nitrogen (NH

-N) on the Liquid Crystal Display.

• To convert the reading to mg/L of ammonia (NH

), multiply by a

factor of 1.214.

INTERFERENCES

Interference may be caused by:

• Organic compounds like: chloramines, various aliphatic and aromatic

amines, glycine or urea above 10 ppm N (positive error).

To eliminate these interferences distillation is required.

• Organic compounds like: aldehydes, alcohols (e.g. ethanol) or

acetone above 0.1 % (negative error).

To eliminate these interferences distillation is required.

• Sulfide: may cause turbidity.

Ammonia LR

• Mark the vial with a pencil on the

white band to place an orientation

sign. Use this sign to insert the test

vial always in the same position into

the holder.

• Place the vial into the holder and

push it completely down.

• Press ZERO and “SIP” will blink on the display.

• Wait for a few seconds and the

display will show “-0.0-”. Now the

meter is zeroed and ready for

measurement.

• Remove the vial.

• Remove the cap and add the content

of one packet of HI 93758-0

Phosphorus Reagent.

• Replace the cap tightly and shake

gently to mix for 2 minutes until

most of the powder is dissolved. This

is the reacted sample.

• Place the vial into the holder and

push it completely down. Ensure that

the vial orientation respect to the

holder is the same as the blank.

• Press TIMER and the display will show the countdown prior to the

measurement. Alternatively, wait for 3 minutes and press READ

DIRECT. In both cases "SIP" will blink during measurement.

Phosphorus, Reactive