Ruskin C0 correction

To apply a correction to the tridente C0 to compensate for the detection of its mounted logger/flow through chamber

Sensor

  1. Take a measurement of the tridente VSF or FTU in a large vessel that does not encroach on the unobstructed volume.

  2. Open the realtime.rsk and record the average reading

Screenshot 2025-07-03 at 12.07.02.png
Fig. 19.    Unobstructed volume average reading

  1. Take a measurement of the tridente VSF or FTU when it is mounted in the flow through chamber, or clamped to its instrument

  2. Open the realtime.rsk and record the average reading

Screenshot 2025-07-03 at 12.07.10.png
Fig. 20.    Mounted or clamped average reading

  1. Derive the offset. This will be the average value from the mounted or clamped measurement, subtracting the unobstructed volume average.

In this example, the offset would be

0.0006205-0.0000001 = 0.0006204

  1. Go to the intruments Calibration tab. Record the Tridente C0 reading.

Screenshot 2025-07-03 at 12.12.19.png
Fig. 21.    The calibration tab showing the Tridente C0

  1. Subtract the offset from the Tridente C0 reading

In this example, the new C0 would be

-97.251E-9 - 0.6204E-3 = ~0.6205E-3

Logger mounted

  1. Take a measurement of the tridente VSF or FTU in a large vessel that does not encroach on the unobstructed volume.

  2. Download the rsk file, and toggle the channel visibility to show the raw channel. Record the average reading

Screenshot 2025-07-03 at 14.38.18 (1).png
Fig. 22.    (a) Toggle channel visibility. (b) Unobstructed average reading

  1. Take a measurement of the tridente VSF or FTU when it is mounted in the flow through chamber, or clamped to its instrument.

  2. Download the rsk file, and toggle the channel visibility to show the raw channel. Record the average reading

Screenshot 2025-07-03 at 14.39.45.png
Fig. 23.    (a) Toggle channel visibility. (b) Mounted or clamped average reading

  1. Derive the offset. This will be the average value from the mounted or clamped measurement, subtracting the unobstructed volume average.

In this example, the offset would be

0.001327-(-0.0000001) = ~0.001327

  1. Go to the intruments Calibration tab. Record the Tridente C0 reading.

Screenshot 2025-07-03 at 14.34.05.png
Fig. 24.    The calibration tab showing the Tridente C0

  1. Subtract the offset from the Tridente C0 reading

In this example, the new C0 would be

 0.0000 - 0.001327= ~-0.001327