Xylem WQ770-B TURBIDITY METER - Manual (Page 11)

Global Water
800-876-1172
• globalw.com
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i. The HiLab screen displays the correct NTU reading for the solution
used in the HiSig calibration step. For 50 NTU solution, press the
arrow keys until the display reads 50 NTU. Press the Save button to
record the HiLab unit. Press the Menu/On button to move to the next
menu.
j. The delay screen indicates the time the meter will take to average
sensor readings. This should be set 5 seconds for the best results.
Press the Menu/On button to return to the initial measuring screen.
k. Repeat steps b-j to calibrate the 1000 NTU range using the 1000 NTU
solution and distilled water. Use the Up arrow button to select the
1000 NTU range in step b and set the HiLab value to 1000 in step i.
IX. Appendix B: Turbidity Standard Solutions
The following turbidity standards are available from Global Water, contact the Sales
Department or Technical Support for more information.
These are EPA approved primary standards that are safe, non-toxic and disposable.
They are easy-to-use with no dilution or re-suspension needed. Their inherent
stability means they do not settle from suspension and require no stirring. The
convenient submicron polymer suspensions are non-toxic primary calibration
standards approved by the US EPA for drinking water analysis for turbidity, and
preferred by the U. S. Geological Survey for turbidity and sediment transport
analysis.
Part Number Description
02-003 0.0 NTU Turbidity Standard
02-004 50 NTU Turbidity Standard
02-005 100 NTU Turbidity Standard
02-006 1000 NTU Turbidity Standard