Humboldt HM-5940, Руководство по эксплуатации продукта

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EFA COMPONENT DESCRIPTION
1. Flowmeter
a. The hardware monitors the speed of the water using the flowmeter
downstream of the sample. The dimensions of the PVC up-pipe are
used to determine a flow rate which is then used to determine the
flow speed across the sample.
2. Temperature Probe
a. The resistance of the thermistor is monitored in order to display and
record temperature.
3. Water Level Sensor
a. Two water level sensors are used to ensure the tank is not under-
or over-filled.
4. Water Control
a. If fresh water is not cycled through the machine the pump will slowly
heat up the water over time. As such, during testing we recommend
turning on all three buttons (Sump, Flow, and Fill) to keep
temperatures relatively constant. The water will sump to the bottom
sensor, fill to the top sensor, then repeat. When the Flow Pump is
turned off, if the Sump Pump button is on, the machine will continue to
sump all water out of the tank.
b. A complete description of the possible states of the system are as
follows:
i. Fill OFF , Flow OFF , Sump OFF
1. System will do nothing.
ii. Fill
OFF , Flow OFF , Sump ON
2. System will sump all water out of the tank.
WARNING: There is no automatic shut off of the sump pump.
User must manually turn off the sump pump when water level
gets lower than sump pump intake.
iii. Fill OFF , Flow ON , Sump OFF
1. System will flow water through the machine only.
iv. Fill OFF , Flow ON , Sump ON
1. System will flow water through the machine and will sump water
out until no water is seen at the lower water level sensor. Once
water is no longer detected the sump pump will stop but the
water flow will continue.
v. Fill ON , Flow OFF , Sump OFF
1. System will fill water tank until water is detected at upper water
level sensor.