Liquid Controls T575N - Manual (Page 3)

Sponsler, Inc. Model T575N Temperature Compensated Totalizer/Printer
INSPECTION
All units are completely assembled, tested, and inspected at the factory prior to shipment. Upon receipt of the unit
a visual inspection should be conducted to detect any damage that may have occurred during shipment.
INSTALLATION
Physical
The T575N should be mounted as practically as possible taking into account display visibility, accessibility, etc.
Ideally, the T575N should be mounted on a stand, positioning the unit 12”-18” above the deck, clear of overhead
pipes and as remote from the pump motor as possible. The Model T575N MUST be securely mounted using
ONLY the SCI supplied shock mounts which have isolating studs.
Electrical
The T575N is designed to operate on the 12 VDC power system of the transport and is “polarity insensitive”. Both
+ and - power inputs should be obtained in the pump control box. To facilitate testing without activating the entire
pumping system, + input power should be derived from the unswitched 12 VDC input to the pump control box.
Every effort should be made to keep the proximity of the totalizer’s input power leads to the pump motor winding
leads as isolated as practically possible within the pump control box. In the event a transport does not have a
pump control box as is the norm in CO
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, 2 wires should be routed to the trailer power junction box connected to the
12 VDC accessory or light circuit located at the front of the trailer.
DO NOT attempt to obtain power by splicing into the light circuit located near the meter; line drops and
fluctuations may affect the unit operation.
DO NOT connect a jumper from the T575N enclosure to the trailer chassis.
DO NOT replace the SCI shock mounts with solid ‘Look Alikes’ available in hardware stores: ‘Look Alikes’ have
solid mounting studs, not isolating studs as provided by SCI.
Cables
SIGNAL: P/N S-2F-2F-G-2S-20: The T575N standard signal cable is a 20’ 2 wire shielded cable with MS3102E
Connector termination which is the industry standard interface for 2-pole pickup coils. The shielding is
single-ended and should not be altered. Connect the shielded end (metal braided shield extends beyond
the end of the connector backshell) to the electronic unit mating connector (CON1).
POWER: P/N P-2M-SP-B-2U-20: The T575N standard power cable is a 2 wire cable with MS3106E12S-3P
connector termination for mating to the unit power connector (CON4) and wire spade terminations for
connection to the 12 VDC power source. The unit is ‘polarity insensitive’ so that either wire may be
connected to + input.
PROBE: P/N R-3F-2M-G-2S-20: The T575N standard probe cable is a 20’ 2 wire shielded cable with
MS3106E12S-2PZ connector termination for mating to the unit probe connector (CON2) and a 3 pin
connector termination for mating with the RTD.
RTD Temperature Sensor
RTD Temperature Sensor: The standard temperature supplied by SCI is a 2-wire 100
Ω RTD with ‘rugged’
specification for use in transport systems. An aluminum head with MS3106E 3-pin connector termination is
assembled to the RTD to facilitate cable connection in the system. The RTD has 1/2-14 NPT threaded nipple for
installation in a mating coupling in the flowmeter outlet piping. A 7/8” Hex plane is located at the center of the RTD
assembly for tightening the RTD into the coupling. DO NOT APPLY WRENCH ON THE PROBE HEAD
ASSEMBLY.
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