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Table 1 Comparative assessment of the time taken to achieve various goals

From: Comparative analysis of the Potter Tower and a new Track Sprayer for the application of residual sprays in the laboratory

Activity

Time taken (minutes)

Potter Tower best case

Calibration

Potter Tower worst case

Calibration

Track Sprayer check calibration

Track Sprayer full

Calibration

Set-up for calibration stage 1

10

10

10

10

PT calibration

Calibration stage 1: centralisation of the Potter Tower (samplers < 10% of the mean weight)

20

90

N/A

N/A

Calibration stage 2: volume required for the desired spray weight

20

20

N/A

N/A

TS calibration

Calibration TS—3 reps carried out at 0.45 m/s for the full calibration 15 min to check settings

N/A

N/A

15

90

Time to spray

20

20

10

10

Time taken for fluorometric analysis

60

60

60

60

Time to clean

60

60

75

75

Total

190

260

170

245

  1. Note that the PT requires calibration every time it is used whereas the TS only once every 6 months. The PT calibration time is extremely variable, and this is reflected with best- and worst-case examples