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Exercise – Flowline LC52 DataPoint User Manual

Page 7

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Step Ten

Step Eleven

EXERCISE

EXERCISE

The following exercise demonstrates inventory control with auto-

matic filling and a high level alarm. The usable range is 60 inches of

liquid. The pump starts filling at 10 inches of liquid and stops filling

at 50 inches of liquid. A high level alarm occurs at 55 inches of liq-

uid.

Enter all values into the LC52 in inches. The OFFSET is the corre-

sponding 4 mA setting in inches. The SPAN is the corresponding 20

mA setting in inches. RLY2A and RLY2B is dedicated to the filling

of the tank because RELAY2 is a latching relay. RLY1 is dedicated to

the high level alarm because it is a single set point relay. Use the fol-

lowing values for programming the LC52-1001.

The next exercise demonstrates the same inventory control with auto-

matic filling and a high level alarm. However, the units have been

changes from inches to gallons. Within the tank, 1” = 50 gallons of

liquid.The usable range is now 300 gallons of liquid. The pump starts

filling at 50 gallons of liquid and stops filling at 250 gallons of liquid. A

high level alarm occurs at 275 gallons of liquid.

OFFSET SPAN RLY1 RLY2A RLY2B

0.0

60.0

55.0

50.0

10.0

OFFSET SPAN RLY1 RLY2A RLY2B

0

300

275

250

50

Enter all values into the LC52 in gallons. The OFFSET is the corre-

sponding 4 mA setting in gallons. The SPAN is the corresponding 20

mA setting in gallons. RLY2A and RLY2B is dedicated to the filling

of the tank because RELAY2 is a latching relay. RLY1 is dedicated to

the high level alarm because it is a single set point relay. Use the fol-

lowing values for programming the LC52-1001.

The following exercise demonstrates inventory control with a high

and low level alarm. The usable range is between 16 and 56 inches of

liquid. The high level alarm occurs at 50 inches of liquid and the low

level alarm occurs at 20" of liquid.

Enter all values into the LC52 in inches. The OFFSET is the corre-

sponding 4 mA setting in inches. The SPAN is the corresponding 20

mA setting in inches. RLY1 is dedicated to the high level alarm

because it is a single set point relay. RLY2A is dedicated to the low

level alarm because the latch is turned off on Relay 2. Use the follow-

ing values for programming the LC52-1001.

The next exercise demonstrates the same inventory control with a

high and low level alarm. However, the units have been changes from

inches to gallons. Along the straight side of the tank, 1” = 50 gallons

of liquid. The usable range is now from 50 to 250 gallons of liquid.

The high level alarm occurs at 220 gallons of liquid. The low level

alarm occurs at 70 gallons of liquid.

Enter all values into the LC52 in gallons. The OFFSET is the corre-

sponding 4 mA setting in gallons. The SPAN is the corresponding 20

mA setting in gallons. RLY1 is dedicated to the high level alarm

because it is a single set point relay. RLY2A is dedicated to the low

level alarm because the latch is turned off on Relay 2. Use the follow-

ing values for programming the LC52-1001.

20 mA = 300 gallons

High Alarm = 275 gallons

Pump OFF = 250 gallons

Pump ON = 50 gallons

4mA = 0 gallons

20 mA = 250 gallons

High Alarm = 220 gallons

Low Alarm = 70 gallons
4mA = 50 gallons

20 mA = 60" of Liquid

High Alarm = 55" of liquid

Pump OFF = 50" of liquid

Pump ON = 10" of liquid

4mA = 0" of liquid

20 mA = 65" of Liquid

High Alarm = 50" of liquid

Low Alarm = 20" of liquid
4mA = 0" of liquid

OFFSET SPAN RLY1 RLY2A

16.0

56.0

50.0

20.0

OFFSET SPAN RLY1 RLY2A

50

250

220

70