FlowLine MicroPoint LI42 Series Owner's Manual page 4

Spec Tech Industrial Electric
PREPARATION
Step Four
A. Supply Voltage: The maximum indicator power supply volt-
age should never exceed 24 VDC. Power supplies with a min-
imum voltage of 12 VDC may be used to power the indicator
during calibration and/or operation.
B. Indicator Cable: The PVC jacketed indicator cable is 10'
(3m) in length. If the cable must be shortened, carefully strip
and remove the outer jacket. Using a 22 gauge wire stripper,
remove the last 1/4" of colored insulation from each wire. The
following legend identifies the indicator wire functions:
Red: (+) 12-24 VDC supply
Black: (-) 12-24 VDC supply
White: (+) Calibration wire
Gray: (-) Calibration wire
Brown: Chan-1sensor input
Orange: Chan-1 sensor return
Green: Chan-2 sensor input
Blue: Chan-2 sensor return
Yellow: Chan-1 FET switch
Purple: Chan-2 FET switch
C. Sensor Cable: The maximum cable distance between the
indicator and attached Flowline transmitter, level or leak detec-
tion switch is 1000 feet (304m). Use a well insulated and shield-
ed twisted pair cable sized from 14-18 gauge.
D. FET Cable: The maximum cable distance between the indi-
cator FET switch and the attached PLC or stepper relay (con-
nected to the pump, valve or alarm) is 250 feet (76m). Use a
well insulated and shielded cable sized from 14-18 gauge.
E. FET Fail-Safe Design: Disabled unless otherwise pro-
grammed via MicroCal, the indicator has (2) SINKING FET (N-
Channel) switch channels rated 1A @ 24 VDC. Normally open
(NO) or normally closed (NC) operation is user calibrated
based on the desired system control and fail-safe logic. Always
design a fail-safe system that accommodates for the pos-
sibility of FET switch and/or power failure. An appropriate-
ly rated DC-COIL STEPPER RELAY should always be
placed in between the FET and load (pumps, valves and
alarms) to avoid damaging the FET switch.
F. Audible Alarm: Disabled unless otherwise programmed via
MicroCal, the audible chirp alarm will activate during an alarm
event. To cancel the alarm, press the push button once. This
will NOT effect the FET switch that will remain in the alarm state
until the measured value returns to the acceptable range.
G. Backlight: For viewing at night or in dimly lit applications,
the indicator has an adjustable backlight that is turned OFF
when shipped from the factory. To turn the backlight ON, press
and hold down the push button. The backlight intensity will
cycle from OFF to HIGH and back to OFF. Release the button
at the desired backlight intensity.
Spec Tech Industrial Electric
www.spectechind.com
Indicator Wires
(+) Red
(-) Blk
Cal. (+) Wht
Cal. (-) Gry
Ch.1 Out Org
Ch.1 In Brn
Ch.2 Out Blu
Ch.2 In Grn
Alarm Yel
Backlight Pur
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CALIBRATION
Step Five
Transmitter #1
Alarm
Channel #1
A. Factory Calibration: Out of the box, the indicator is factory
calibrated to interface with (2) SOURCING two-wire loop pow-
ered level transmitter inputs and display percentage of mea-
sured span on each channel. The following describes the indi-
cator functions as delivered under factory calibration:
Function
Chan-1 sensor input:
Chan-2 sensor input:
Display decimal point:
Chan-1 FET switch:
Chan-2 FET switch:
Backlight:
B. Percentage of Span: To optimize the percentage of span
indication, it is recommended that the level transmitter(s) span
be properly calibrated with 4 mA
placed near tank EMPTY and 20
mA placed near tank FULL. The
indicator can then read the entire
0-100% span. Please refer to the
appropriate level transmitter own-
ers manual(s) for specific calibra-
tion instructions. Factory calibra-
tion users should now go to the
Installation Section of this man-
ual.
C. MicroCal Calibration: To customize engineering units, con-
figure FET alarm set points from level transmitter, level switch
or leak detection switch inputs, and/or linearize the volumetric
measurement of odd shaped tanks, use the MicroCal calibra-
tion kit. MicroCal calibration users should now go to the
MicroCal Calibration Kit LI96 Series Owners Manual for
programming instructions. Once calibrated, return to this
manual and continue starting with the Installation Section.
888-773-2832
LI42 Series
MicroPoint
Transmitter #2
Alarm
Channel #2
12-24 VDC
Supply
Factory Calibration
4 mA = 0.0%
20 mA = 100.0%
4 mA = 0.0%
20 mA = 100.0%
1-place (100.0%)
Not enabled
Not enabled
OFF
Full
(20 mA)
100%
Empty
(4mA)
0%
888-773-2832