Hydro-Wiper Operation Manual
Hydro-Wiper operation manual Overview The Hydro-Wiper is a mechanical wiper system designed to be easily fitted to optical turbidity sensors. By wiping at regular intervals, the Hydro-Wiper keeps the optical window of the turbidity sensor clear of biofouling and deposits such as mud and algae. This reduces the necessity for costly site visits to manually clean the turbidity sensor, and prevents on-going data loss due to fouling.
Hydro-Wiper operation manual Installation The turbidity sensor is mounted in the clamp at the front of the wiper. Ensure that the turbidity sensor is positioned so that the flat face of the optical window is looking directly away from the wiper, and that the brush covers the whole face when it sweeps passed. The brush should lightly sweep across the whole surface of the optical window.
Hydro-Wiper operation manual Operation To open the wiper control housing, unscrew the lid in an anticlockwise direction. If the lid is tight, the lid shifting tool supplied with the Hydro-Wiper can be used. This tool fits into the groove in the top face of the cap, and allows greater leverage. The lid shifting tool should never be used to tighten the lid. Inside the wiper control housing is the battery holder, wipe interval select switch, power switch, and diagnostic LED.
Hydro-Wiper operation manual switched off. The optimal wipe interval will depend on environmental conditions at the field site. Generally a wipe interval of 3 hours should prove sufficient to keep the turbidity sensor clean in moderate fouling conditions. Wipe interval select switch position 0 1 2 3 4 5 6 7 8 9 Wipe interval (minutes) 15 30 45 60 120 180 240 300 360 720 Table 1; Wipe interval select switch settings Only good quality alkaline batteries should be used, such as Energizer or Duracell.
Hydro-Wiper operation manual LED Blink sequence Description 1 Normal operation 2 Previous wipe failed 3 Low battery shutdown Table 2. LED blink sequence Low battery shutdown occurs when the battery pack reaches around 6.5 volts. In this mode no further wipes are performed. When the Hydro-Wiper is switched on, the wiper will perform an immediate wipe.
Hydro-Wiper operation manual wipe. The diagnostic LED will flash twice every 15 seconds whilst this situation continues. Maintenance The Hydro-Wiper requires very little maintenance, and should provide reliable operation for many years. The only user replaceable part, apart from the batteries, is the brush. Under normal conditions, the brush should last many thousands of wipes. If however the brush does need replacement, these can be obtained from your supplier or directly from Zebra-Tech Ltd.
Hydro-Wiper operation manual Specifications Wipe interval; User select (15,30,45,60,120,180,240,300,360 or 720 minutes) Clock accuracy; +/- 1 minute per year (0 - 40° C) Power supply; 6 x Alkaline AA batteries Power consumption; Quiescent, 0.02mA, ~ 80 mA during a wipe Deployment endurance; Wipe interval dependent.
Hydro-Wiper operation manual Contact Zebra-Tech Ltd PO Box 1668 Nelson New Zealand Tel: International 0064 3 5471590 Fax: International 0064 3 5471598 Email: enquiry@zebra-tech.co.nz Web: www.zebra-tech.co.
