User Guide

9
A zero reading was not taken. Follow the
instruction described in the measurement
procedures for zeroing the meter.
Under range. A blinking "0.00" indicates
that the sample absorbs less light than the
zero reference. Check the procedure and
make sure that you use the same cuvet for
reference (zero) and measurement.
1) A flashing value of the maximum con-
centration indicates an over range condi-
tion. The concentration of the sample is
beyond the programmed range: dilute the
sample and rerun the test.
2) A flashing value lower than the maxi-
mum concentration indicates a low signal-
to-noise ratio condition. In this case accu-
racy of the result is not guaranteed. Repeat
the reading procedure.
The sample and zero cuvet are inverted.
b) on sample reading:b) on sample reading:
b) on sample reading:b) on sample reading:
b) on sample reading:
There is too much light for the sample
measurement. Please check if the right
sample cuvet is inserted.
• Wait for a few seconds and the
display will show "-0.0-". Now the
meter is zeroed and ready for
measurement.
• Remove the cuvet.
• Add the content of one packet of
93751 reagent
• Replace the cap and shake gently
for 1 minute.
• Reinsert the cuvet into the
instrument.
• Press TIMER and the display will show the countdown prior to the
measurement or, alternatively, wait for 5 minutes and press READ
DIRECT. In both cases “SIP” will blink during measurement.
• The instrument directly displays concentration in mg/L of Sulfate
(SO
4
2-
) on the Liquid Crystal Display.
INTERFERENCES
Color or suspended matter in large amounts will interfere: suspended
matter should be removed by previous filtration.
Organic matter in large amounts may impede the precipitation of
barium sulfate.
Calcium (as CaCO
3
) >20000 mg/L
Chloride (as Cl
-
) >40000 mg/L
Magnesium (as MgCO
3
) >10000 mg/L
Silica (as SiO
2
) >500 mg/L
Sulfate
52
12
3
6
9
1’