User Guide

78Total Hardness LR

• Place the cuvet into the holder and

ensure that the notch on the cap is

positioned securely into the groove.

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

measurement or, alternatively, wait for 2 minutes and press READ

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

• The instrument directly displays the hardness in mg/L of CaCO

on the Liquid Crystal Display.

• The conversion factors to convert readings in mg/L to French

Degrees (FD), German Degrees (DD) and English Degrees (ED) of

hardness are as follows:

1 mg/L= 0.1 FD = 0.0556 DD = 0.07 ED

INTERFERENCES

Interference may be caused by excessive amounts of heavy metals.

Note: if the sample is very acidic, some extra drops of HI 93735B

Buffer reagent may be added.