Humboldt HM-5940 User manual

product manual
4.22
HM-5940
Erosion Function Apparatus

2
HM-5940
Erosion Function Apparatus
WARNING!
ENSURE WATER LEVEL IS ABOVE THE INTAKE FILTER BEFORE
OPERATING PUMP. THE MECHANICAL SEALS IN THE PUMP
REQUIRE THE CONSTANT FLOW OF WATER FOR COOLING
AND LUBRICATION, AND WILL BE DAMAGED IF THERE IS NOT
SUFFICIENT FLOW OF WATER IS AVAILABLE WHEN OPERATING
Specications
Dimensions:
Length: 1.01 m
Width: 2.4 m (including wheel jacks)
Height: 2.4 m
(with outlet pipe erected and wheels retracted)
Weight
Empty: 1300 lb or 590 kg
Fully Loaded: 3000 lb or 1400kg
Pump
Model No: 25SH06D15T3F2
Volt: 208-230 VAC
Amp: 34-36.8
Peak Amps Required: 40 Amps
Horsepower: 15
HZ: 60
Maximum Ambient Temperature: 40C
Water Velocity
0.3 m/s to 6.0 m/s

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Installation
Assembly
The Humboldt HM-5940 EFA requires some assembly upon arrival. The
outlet pipe section is shipped with the machine and must be attached
once the machine is positioned in the laboratory.
Fig. 1: Humboldt HM-5940 Outlet Pipe Assembly
Each of the holes in the PVC plastic pipe ange are numbered. Use these
numbers for the bolt tightening sequence.
Water
One tap water wall-mounted outlet should be permanently connected to
an inlet water hose which is also connected to the inlet water valve. The
Humboldt HM-5940 EFA machine comes supplied with a female garden
hose tting on the inlet water valve. The inlet hose tting is a ¾ inch gar-
den hose connector tting.

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Drainage
A oor drain or sewage port is needed near the EFA to facilitate period-
ically draining the water tank. It is suggested that a permanent drain-
age hose go into the drain. The HM-5940 EFA machine has two water
outlet connections. The upper connection has a ¾ inch garden hose
tting which is connected to the pipe coming from the sump pump in the
bottom of the tank. The second outlet is located at the bottom of the low
end of the tank. The lower outlet has a valve with a ¾ inch NPT female
thread.
Power
The Humboldt HM-5940 EFA machine requires 230 volt, 3-phase, 60 Hz,
wall-mounted service. A 5 wire power cord (3 phase, neutral, ground) is
supplied with the machine.
Ceiling/Door Height
If the EFA is to be placed in a room, check the door height as well as the
ceiling height to be greater than the height of EFA. A minimum height of
2.5 m (≥8 feet) is required with the wheels fully retracted.
Weight
The Humboldt HM-5940 EFA weighs approximately 5.8kN (1300 lbs).
One fully loaded EFA weighs at least 13.3kN (3000 lbs). There is also a
slight dynamic load factor when the pump is working. Be sure to check
the oor load grade before moving in the EFA into position.
Ventilation
The room for the EFA should be well ventilated.
Illumination
The room for the EFA should be well illuminated.

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Figure 2: Elevation View of EFA
Figure 3: Plan View of EFA

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Figure 4: Detail View of Sample Compartment and
Function of Components Within

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EFA COMPONENT DESCRIPTION
1. Flowmeter
a. The hardware monitors the speed of the water using the owmeter
downstream of the sample. The dimensions of the PVC up-pipe are
used to determine a ow rate which is then used to determine the
ow 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-lled.
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, ll 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 ow water through the machine only.
iv. Fill OFF, Flow ON, Sump ON
1. System will ow 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 ow will continue.
v. Fill ON, Flow OFF, Sump OFF
1. System will ll water tank until water is detected at upper water
level sensor.

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vi. Fill ON, Flow OFF, Sump ON
1. System will begin lling water and pumping water out at the
same time. WARNING: In this case the sump pump will not turn off
and will continue to pump out water if the water level gets below the
lower water level sensor.
2. This setting should not be used for anything other than recycling all
water out of the tank and relling with fresh water. However, the
user will need to manually turn off the sump pump.
vii. Fill ON, Flow ON, Sump OFF
1. System will ow water through the machine and will ll the water
tank until water is detected at the upper water level sensor. Once
water is detected the lling will stop but water ow will continue.
viii. Fill ON, Flow ON, Sump ON
(Recommended setting during testing).
1. System will fully automate water cycling. Water will ow over the
sample continuously. At the same time, water will be pumped out
of the tank until no longer detected on the lower water level sensor.
At this point the sump will turn off and the water tank will ll up until
water is detected at the upper level sensor. The sump will then
re-activate, starting the cycle anew.

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Touchscreen Operation
Main Screen:
1. Menu: Press to access current and previous test screens and settings.
2. Shelby tube motor controls: Tap a button to move piston slightly;
hold to move quickly.
3. Pump Control tab: Press to access water controls.
4. Zero: Press to reset: “Push Distance” variable (Used prior to testing).
1
2
3
4

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Pump Controls:
1. Water control buttons:
• FLOW turns the pump motor on and off
• SUMP turns the sump pump on and off
• FILL opens and closes the  ll valve
2. Flow speed: Tap the yellow box to enter a new  ow speed ( ow units
can be changed in Settings->Preferences)
1
2

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Current Tests:
1. Shelby Tube Controls:
• The STEP button will push the soil sample up by the distance
indicated in the yellow box under the STEP. The push speed is
indicated in the yellow box under the CONTINUAL button
• The CONTINUAL button will continuously push the soil sample up at
the speed indicated in the yellow box under CONTINUAL
• The HOME button will return the piston to the bottom of the tube
• Tap the yellow box to change the push distance
2. Table/Graph Button: Press to switch between graph and tabulated
views.
3. Test Mode Selection:Select how to operate the piston during a tes.t
4. Start/Stop Button: Press to start or stop recording data.
5. Graph Selection: The graph can be cycled between water temperature
and ow speed by graph label on they Y axis (4). This operation can be
done on either a previous test or a current test.
1
3
4
5
2

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Previous Tests:
1
2
3
1. Test selection: The most recent test is Test 1; select other entries to
show previous tests.
2. Export: Press to export the test to a USB stick. This will export as
an .HTD  le. This  le can be uploaded to a PC to view using the
HM Data Download software.
3. Delete: Press to delete test from internal storage.
4. Graph Selection: Press to toggle between the Temperature and Flow
Speed graphs
4

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Settings:
Update: Provides the ability to update the controller from the USB stick.
Date/Time: Set the clock and related options.
Display: Adjust the backlight and automatic dimmer.
Preferences: General settings (units, controls etc.)
Network: DHCP toggle and static IP settings.
Information: General machine info often requested for support purposes.
Contact: Humboldt contact info.

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Adjusting Flow Speed
The  ow speed box controls the velocity of the circulating water in the
machine. The machine can operate up to 7.0 m/s. (Note: To achieve
speeds higher than 6.0 m/s it is recommended to use a power supply that
can output up to 40 A.)

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Pump Modes of Operation:
The main water pump has three options for controlling the velocity of wa-
ter owing over the sample. Depending on the water ow speed desired;
automatic, manual, or sump control may be chosen for managing the
water velocity for the test.
Automatic Mode:
In Automatic Mode manages the water ow speed between the ranges
of 0.15 m/s to 7.0 m/s. When in Automatic Mode, the controller will auto-
matically monitor the water velocity and adjust the pump’s water output
to maintain the target water velocity. This the default control setting for
the EFA, and nothing need be done in order to operate the EFA in Auto-
matic Mode.
Flow Controls:
1
1. To use the Automatic Mode simply enter the desired water velocity on
the touch screen and press the FLOW button.

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Manual mode is intended for use where the desired water velocity is
between 0.2 m/s – 7.0 m/s, and it is desired to manually ne tune the
ow speed. To use the Manual Mode for water ow control, select
HOME>SYSTEM SETTINGS>PREFERENCES on the control panel touch
screen.
Manual Mode:
1. Once in the PREFERENCES window, scroll down using the slide bar on
the touch screen and select the MANUAL radio button.
1

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Ensure to open the Flow Restriction valve on the front of the EFA before
pressing the Flow button on the touch screen. After water starts owing
for 15 seconds the ow rate should stabilize and the Flow Restriction
valve can be adjusted to ne tune the ow rate to the desired target.
1
1. When the control is set to Manual Mode the pump output is displayed
as a percent value. The default value is set at 20% and has a range of
14% - 100%.
NOTE: UK models have a PWM range of 13.3% - 100%.

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Sump Flow Control is an alternate method of managing low a water
velocity by using the sump pump rather than the primary water pump
for water circulation. Much like the Manual Mode for the primary pump,
using the sump pump to control the water velocity will also allow for  ow
speeds between 0.15 m/s and 0.2 m/s. However, using the sump pump to
manage the water velocity requires the user to set the valves on the EFA
prior to engaging the sump pump.
To use the sump pump to manage the water speed do the following:
1. Fully close the Flow Restriction valve
Sump Flow Control:
OPEN CLOSE

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1. Ensure the sump drain valve is closed (blue handle)
Sump Drain Valve (Closed)
Sump Drain Valve (Open)
Flow Restriction Valve
OPEN
CLOSE

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Sump Flow Valve
2. Open the sump  ow valve (red knob)
OPEN CLOSE
With the Flow Restriction valve closed and Sump Flow valve open, the
water  ow can be initiated by pressing the SUMP button on the touch
screen. With the Sump Flow valve fully open, water will  ow at 0.2 m/s
Once water is  owing over the sample and a water velocity is showing
on the display, the Sump Flow valve can slowly be closed to reduce the
water  ow rate to the desired target rate.
NOTE: The fl ow meter can reliably read down to approximately 0.1m/s
before its signal becomes unreliable and the accuracy of the displayed
fl ow rate shown on the touch screen becomes less accurate.