Liquid Controls SP2800 - Manual (Page 5)

1
SECTION 1 INTRODUCTION
1-1 General Description
Sections 1 through 8 of this manual describe
the wiring, programming and functionality of
the standard Batch controller. Section 9 de-
scribes the wiring, programming and function-
ality of Batch controllers with software version
8.7 (Option 6). Software version 8.7 incorpo-
rates Remote Start, Stop & Reset with EZ
PRE (easy preset). EZ PRE is a useful tool
for applications that require frequent changes
to the Preset amount.
The Batch controller uses the following soft-
ware versions:
VER 8.7 (Basic unit; Remote Start, Stop
& Reset with EZ PRE “Easy
Preset”)
VER 12.0 (Option 4; 16 point linearization)
1-2 Typical Application
The above application involves liquid flow.
The start button is pushed and the Batcher
receives pulses from the flowmeter. The
pulses are scaled by the K Factor and sent
out via the pulsed output to an external
counter. The Analog output is directed to a
strip chart recorder which gives a hardcopy of
the rate. As the Prewarn is reached, the
control valve partially closes. When the final
Preset is reached the valve shuts down com-
pletely. At any time the flow can be sus-
pended by hitting the stop button. Through
the serial communications, a computer keeps
a record of the daily events.
1 2 3 4 5 6
Flowmeter
Computer
Solenoid Valve
Remote
Totalizer
Strip Chart
Recorder
Pulse Output
RS232
Output Analog
Output
1-3 Principles of Operation
Presets
When the start button is pushed, two relays
engage simultaneously to start flow. When
the prewarn number is reached, one relay
drops out. When the preset number is
reached, the other relay drops out. The user
may enter the two numbers when setting up
the batch counter. The prewarn is set a cer-
tain number of counts less than the preset
number. If the prewarn is set larger than the
preset, the message "PREWRONG" will ap-
pear on the display.
Ratemeter
Accurate to 5 1/2 digits (
±
1 display digit). The
ratemeter can be programmed to accept al-
most any number of pulses per unit of mea-
surement, sample from 2 to 24 seconds maxi-
mum, and auto range up to 6 digits of signifi-
cant information. The ratemeter with a K Fac-
tor of 1 displays the rate of pulses per second.
Simply dial in the proper K Factor to display in
minutes, hours or other units of measurement.
Press the C button, while the unit is displaying
the batch, to display the rate; 'R' is displayed
on the left side of the display.
K Factor
The K Factor is used to convert the input
pulses or analog input into workable units.
The 8 digit K Factor is a divider with a range
of 0.00011 to 99999999 (the decimal point
may be keyed into any position). Separate K
Factors may be entered into the count and
rate sections of the Batcher. Thus, you may
batch in gallons and display rate in liters per
hour. The maximum factored count speed is
20000 Hz. The maximum factored rate is 7
digits.
16 Point Linearization (Optional)
This option extends the accurate range by al-
lowing users to dial in different K Factors for
different input rates. This option may be used
with digital or analog inputs. (See Section 7-
3.)