Dwyer Instruments DPL Manuel utilisateur

4+,19(14038,:,1!;08*/

!5,*0-0*(80437378(11(8043(3+5,6(803.37869*80437

911,803

Maintain liquid level high and low limits with the 4+,1  9(1 4038 ,:,1

!;08*/Units can be used for single or dual point level control in semi-solid liquids,

industrial slurries or heavy-bodied liquids like wastewater. Standard 24 inch

electrodes can be cut by the end-user to a shorter length or lengthened by adding

up to two 24 inch extensions (sold separately) to reach the maximum

recommended length of 72 inches. Model DPL contains no moving parts to get

stuck or wear out. Controller features adjustable sensitivity and DIN rail-mountable

socket mount.

!""

Conductivity Probes

1. Probes can be but to length. emove probes from sensor head by carefully

unthreading them from inserts. 4348 overtighten when re-installing.

2. Cut two (2) probes to the same length, these will be the common and lower

level probes. See Figure 1.

3. Cut one (1) probe to the desired length for the upper level of the tank. See

figure 1.

4. Spacer should be located approximately 1 inch (25.4 mm) from bottom of

shortest probe.

5. If build up occurs on probes a short circuit could occur. If this happens apply

shrink tubing to the probes leaving the last 1/2 inch (12.7 mm) bare.

Wiring (from sensor head to controller)

1. Install cable into sensor head through the compression fitting supplied

2. Attach the black lead between the common probe terminal and terminal five (5)

on the socket mount. See figure 2.

3. Attach the white lead between the lower level probe terminal and terminal (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.

% !

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.

## "

Pumy-Up Operation is designed to keep tank levels at the high electrode position.

The conroller 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 remails on until the liquid level reaches the high

level electrode.

1. Connect sensor head to controller as discussed above.

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

voltage required by the device (pump, valve, etc.) being turned in 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.

%' !" #"!

/43, ;;;+;=,60378*42

&>"'#! (< ,2(0103-4+;=,62(01*42

!"!

1,*864+,71/8” dia, 24” length, standard.

%,88,+(687316 Stainless Steel, polypropylene. All food grade materials.

493803.!,3746,(+1” NPT.

(<02926,7796,30 psig (2.06 bar).

(<02925,6(803.",25,6(896,212˚F (100˚C)

433,*803.()1,64),844386411,610 ft (3.0 m).

!,3703.$418(.,12 VAC.

64),!,37080:08=Adjustable to 100,000 Ohms

4;,6!9551=120 VAC 50/60 Hz.

98598SPDT, 5 Amps @240 VAC.

64),3*14796,IP68 (NEMA 6).

(<029264),,3.8/72” (1.8 m) with optional extensions.

493803.4386411,6Standard octal socket or 35mm DIN rail.

1,*860*(1433,*80437Screw terminals located on socket mount.

%,0./864),77,2)1=1.5 lbs (0.68 kg).

%,0./84386411,61.0 lb (0.45 kg).

27.1

[687]

24.00

[610]

1" MALE NPT

0.13

[3.2]

3.11

[79]

2.385

[60.58]

Ø2.26

[57]

1.40

[35]

3.73

[95]

2.81

[71]

2.25

[57]

1.75

[44]

UPPER LEVEL

LOWER LEVEL

COMMON LEVEL

SPACER

110 VAC (WHITE)

UPPER LEVEL PROBE

DEVICE POWER SUPPLY

110 VAC (BLACK)

LOWER LEVEL PROBE

PROBE COMMON

NORMALLY CLOSED

NORMALLY OPEN

# 

# 

#% "

Pump-Down Operation is designed to keep tank levels at the low electrode

position. The pump or solenoid valve will start when the liquid levels 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 decive power supply to terminal 1. (The device power supply is the

voltage required by the device (pump, valve, etc.) being turned in or off. This

voltage can be either AC or DC Volts and up to 220 VAC max.) See figures 2

and 4.

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

%' !" #"!

/43, ;;;+;=,60378*42

!!"$"'#!""

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.

"

Upon final installation of the Model DPL Dual Point Level Switch, no routine

maintenance is required. A periodic check of system calibration is recommended.

The Model DPL is not field serviceable and should be returned if repair is needed

(field repair should not be attempted and may void warranty). Be sure to include a

brief description of the problem plus any relevant application notes. Contact

customer service to receive a return goods authorization number before shipping.

PUMP-UP OPERATION

110 VAC

POWER

SUPPLY

DEVICE

POWER SUPPLY

PUMP

VALVE

PUMP-DOWN OPERATION

110 VAC

POWER

SUPPLY

DEVICE

POWER SUPPLY

PUMP

VALVE

PUMP-DOWN OPERATION

# 

# 

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