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Dwyer instruments, inc – Dwyer DPL110 User Manual

Page 2

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©Copyright 1999 Dwyer instruments, Inc

Printed in U.S.A. 7/99

FR# R1-443103-00

DWYER INSTRUMENTS, INC.

Phone: 219/879-8000

www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, ,U.S.A. Fax: 219/872-9057

e-mail: [email protected]

Lit-By Fax: 888/891-4963

3. Attach the white lead between the lower level probe

terminal and terminal six (6) on the socket mount.

4. Attach the red lead between the upper level probe

terminal and terminal eight (8) on the socket mount.

5. Tighten compression fitting until cable cannot be

pushed into sensor head.

Warnings
Install controller according to applicable electrical
codes. Do not connect directly to line voltage. Not for
use in hazardous (explosive) environments. Do not
exceed pressure and temperature ratings.

Pump-Up Operation
Pump-Up Operation is designed to keep tank levels at
the high electrode position. The controller output
switches from normally open to normally closed when
the liquid level falls below the lower level electrode.
When the switch is normally closed, the load to a pump
or solenoid valve is turned on and the tank begins to
refill. The pump or solenoid valve remains on until the
liquid level reaches the high level electrode.

1. Connect sensor head to controller as discussed

above.

2. Connect the device power supply to terminal 1. (The

device power supply is the voltage that is required
by the device (pump, valve, etc.) being turned on or
off. This voltage can be either AC or DC Volts and up
to 220 VAC max.) See figures 2 and 3.

3. Connect one end of the pump/valve to terminal 4 and

the other end to the device power supply.

4. Connect 110 VAC power to terminal 2 and 7.
5. Snap the controller onto the socket.

Probe Sensitivity Adjustment
Because conductivity varies widely among liquids, the
controller is adjustable for sensitivity in different liquids.
An adjusting screw is located on the front face of the
controller. 1 is the least sensitive setting for highly
conductive fluids. 9 is the most sensitive setting for
least conductive fluids. Typically, the sensitivity should
be set at 5.

Maintenance/Repair
After final installation of the Model DPL Dual Point Level
Switch, no routine maintenance is required. A periodic
check of system calibration is recommended. These
devices are not field repairable and should be returned
to the factory if recalibration or other service is required.
After first obtaining a Returned Goods Authorization
(RGA) number, send the material, freight prepaid, to the
following address. Please include a clear description of
the problem plus any application information available.

Dwyer Instruments, Inc.
Attn: Repair Department
102 Highway 212
Michigan City, IN 46360

7

8

1

2

6

5

4

3

Upper Level Probe

110 VAC (White)

Device Power Supply

110 VAC (Black)

Lower Level Probe

Probe Common

Normally Closed

Normally Open

Figure 2

7
8
1

2

6
5
4

3

Pump

or

Valve

Device

Power Supply

Pump-Up Operation

110 VAC

Power
Supply

Figure 3

7
8
1

2

6
5
4

3

Pump

or

Valve

Device

Power Supply

Pump-Down Operation

110 VAC

Power
Supply

Figure 4

Pump-Down Operation
Pump-Down Operation is designed to keep tank levels
at the low electrode position. The pump or solenoid
valve will start when the liquid level reaches the high
level electrode and remain on until the level reaches the
lower level electrode.

1. Connect sensor head to controller as discussed

above.

2. Connect the device power supply to terminal 1. (The

device power supply) is the voltage that is required
by the device (pump, valve, etc.) being turned on or
off. This voltage can be either AC or DC Volts and up
to 220 VAC max.) See figure 2 and 4.

3. Connect one end of the pump/valve to terminal 3 and

the other end to the switched voltage return.

4. Connect 110 VAC power to terminal 2 and 7.
5. Snap the controller onto the socket.