What might cause a water sampler pump to not start? How can this be fixed?

Check to ensure that the voltage of the external battery is adequate. For water samplers with a large pump, the battery voltage should be greater than 12.3 Vdc. If the voltage is below 12.3 Vdc and a large pump is being used, recharge the battery to full charge. If the water sampler is a PVS-series sampler and ac power is available, keep the sampler plugged in.

If the pump continues to fail to start, follow these steps:

  1. Remove the bottom splash plate.
  2. Tap the pump with a rubber mallet while attempting to initiate a manual sample.
  3. Check the voltage at the pump. If the voltage is below 12.3 Vdc, check the wiring to ensure that it is making contact and that no corrosion is present. As necessary, tighten the contacts, replace any broken wires, and clean off the corrosion.
  4. Recheck the voltage at the pump. If the voltage reading is greater than 12.3 Vdc and the pump continues to fail starting, the pump is faulty and should be replaced or repaired if parts are available. Rebuild kits are available for some pumps. Contact an application engineer at Campbell Scientific for further assistance.

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