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Calibration Menu - Van Walt CT12 Operating Instructions Manual

Compact turbimeter

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VAN WALT

Monitoring your needs

To index a cuvette, insert the sample cuvette with the orientation mark facing

forward. Systematically rotate the sample cuvette 45° at a time and record the

position of the lowest value. This is the optimal cuvette alignment for low turbidity

measurement.

Total Suspended Solids - This mode will only be active if a site calibration has been

stored within the Compact Turbimeter. Once a calibration has been created (via

the Calibration menu) the site ID can be used to recall the site specific relationship

between turbidity and suspended solids. Choose Reading mode, select Total

Suspended Solids and press 'OK'.

Highlight the Site ID for the Site/Sample under investigation using the Up/Down

arrows. The calibration data will be recalled automatically. Insert the sample with

the orientation mark facing forward and press 'Read'.

A beep will occur at the start and end of each measurement cycle. Result is

displayed on the screen in mg/l and stored in the log with time, date, Operator ID

and Sample ID.

CALIBRATION Menu

The Compact Turbimeter is delivered with a stored calibration carried out on primary

Formazin standards and validated as part of the production process. For field use a

set of calibration standards are provided as part of the kit.

Two different methods of calibration are available for the Compact Turbimeter.

The calibration methods are :

SDVB – The use of SDVB for field calibration of turbidity meters is preferable due

to the improved stability and handling compared to Formazin. When calibrating

turbidity instruments, SDVB standards are assigned to a specific model and cannot

be transferred. Using SDVB standards from another manufacturer may differ greatly

when applied to the Compact Turbimeter. This is normal behavior and should not

cause concern.

Compact Turbimeter

Operating Instructions

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