Hach DR/700 - Page 197

45-25
Method 8141
HYDRAZINE (0 to 400 µg/L)
For boiler water/feedwater, water and seawater
p-Dimethylaminobenzaldehyde Method*
1. Install module
45.01
in a DR/700.
Note: Samples must be
analyzed immediately
and cannot be preserved
for later analysis.
2. Press: I/O
The display will show
450 nm
and module number
45.01
3. After 2 seconds,
the display will show
the program number,
the concentration
units, decimal
position and the zero
prompt. If necessary,
press the
UP ARROW
key until the lower
display shows
program number
45.04.1
*Adapted from ASTM Manual of Industrial Water, D1385-78, 376 (1979)