Hach AS950 User Manual

Table 13 Lined or built-up channels (continued)
Concrete Trowel finish 0.011 0.013 0.015
Float finish 0.013 0.015 0.016
Finished, with gravel
on bottom
0.015 0.017 0.020
Unfinished 0.014 0.017 0.020
Wood Planed, untreated 0.010 0.012 0.014
Planed, creosoted 0.011 0.012 0.015
Unplaned 0.011 0.013 0.015
Plank with battens 0.012 0.015 0.018
Brick Glazed 0.011 0.013 0.015
In cement mortar 0.012 0.015 0.018
Masonry Cemented rubble 0.017 0.025 0.030
Dry rubble 0.023 0.032 0.035
Asphalt Smooth 0.013 0.013 —
Rough 0.016 0.016 —
Vegetal lining — 0.030 — 0.500
Excavated or dredged
Earth, straight and uniform 0.016 0.022 0.035
Earth, winding and sluggish 0.023 0.030 0.040
Rock cuts 0.030 0.040 0.050
Not maintained channels 0.040 0.070 0.140
Natural channels (minor streams, top width at flood 30.5 m (100 ft.))
Fairly regular section 0.030 0.050 0.070
Irregular section with pools 0.040 0.070 0.100
32 English

Hach AS950 Specifications

General

Sample Frequency	Programmable
Type	Portable
Sampling Method	Vacuum Pump
Temperature Control	Refrigerated
Bottle Configuration	24 x 1L bottles
Power Supply	12V DC
Communication	RS-232
Sampler Type	Portable or Stationary
Vertical Lift	8.2 m
Enclosure Rating	IP67
Number of Samples	Up to 999
Storage Capacity	24 samples
Bottle Options	1L