YSI pHotoFlex Series - Manual (Page 43)

43 ba76126e01 03/2013
YSI model no.: MCA-1 TP
Category: RT (reagent test)
Cell: 16 mm
Measuring range: 0.04 - 4.50 mg/l Cl
2
(MCA)
0.03 - 3.26 mg/l NH
2
Cl
Display in mmol/l possible
Perform a zero
adjustment using a
16 mm cell filled with
sample. Pipette 10.0 ml sample
into an empty 28 mm
cell. Add the contents of a
Vario Monochlor F
RGT powder pack and
close the cell with the
screw cap. Shake the cell vigorously
for about 20 seconds to
dissolve solids. Allow to react for 5
minutes.
Note: Failing to restore
the zero adjustment
will result in all future
measurements being
erroneous!
Transfer the prepared
sample to an empty
16 mm cell and close it
with the screw cap. Insert the 16 mm cell in
the photometer cell shaft
and start measurement. When switching to
another program restore
the zero adjustment by
performing a new zero
adjustment using a
16 mm cell filled with
deionized water.
Notes:
• Collect samples in clean glass bottles and analyze as soon as possible.
• The 5 minutes reaction times refer to a sample temperature of 18-20 °C (64-68 °F).
For other sample temperatures adjust the reaction time according to the follwing table:
• We recommend to determine a new reagent blank value (deionized water instead of sample) for each test package started.
5:00
Sample temperature Reaction time
(minutes)
Sample temperature Reaction time
(minutes) °C °F °C °F
5 41 10 20 68 5
10 50 8 23 73 2.5
16 61 6 25 77 2
Monochloramine (MCA)
Program no.
344
*RN344*