MONITORS MOVEMENT OF DIVIDER BLOCK PISTON FOR DEPENDABLE “TIMED” SHUTDOWN PROTECTION

CLOSED LOOP OR OPEN LOOP OPERATION

INSTALLS DIRECTLY TO DIVIDER VALVE

NOT AFFECTED BY TEMPERATURE OR OIL VISCOSITY

REQUIRES NO EXTERNAL POWER

LED INDICATOR - CYCLE INDICATION

DEDICATED SWITCH CLOSURE TO MONITOR EACH DIVIDER VALVE CYCLE (PS OPTION)

SPECIFICATIONS

Temperature Range.............................................. -40C to +55C
Switch RaTing........................................................2.5VA/240 VDC
PRX Rating............................................2.5VA/200 VDC MAX/0.5A
Epoxy Encapsulated.......................UL LISTED EL-CAST VFR 641
Alarm/Shutdown........................ Factory default for 3 minute alarm
Power......................................Field Replaceable - Lithium Battery
.......................................3.6 Volt, 1.5Ah, 75mA MAX Contentious Current
Battery........................................................................ P/N 000505
Divider Block Application............Dropsa/Lincoln/SBCO/Lubriquip
Warranty.........................................................................2.5 Years

DESCRIPTION

The DNFT-LED-PS is a totally enclosed electronic device, combining the latest technology in microprocessor and transistor components for detecting Slow-Flow and No-Flow of divider block lubrication systems. The DNFT incorporates an oscillating crystal to accurately monitor the cycle time of the lubrication system to enable precision timed shutdown capability. The magnet assembly and control housing mount directly to the divider valve to become an integral part of the lubrication system. The DNFT operates on a field replaceable lithium battery. If battery voltage drops below normal operating levels the DNFT goes into alarm mode and the unit cannot be restarted. LED models utilize an LED to indicate each cycle of the divider valve. This enables the operator to easily set and monitor lubrication rates. The DNFT has been designed and rated for use in Class I Zone I environments, to be used outdoors in wet or dry locations, in altitudes under 2000 meters, with a Pollution Degree of 4.

OPERATION

Lubricant flow through the divider valve assembly forces the pistons to cycle back and forth causing a lateral movement of a magnet linked to the piston. Movement is monitored by the microprocessor which resets the timer, lights the LED, and allows the unit to continue operation, this indicates one complete cycle of the lubrication system. The microprocessor must receive this cycle in a predetermined time or a shutdown will occur. The DNFT will automatically reset alarm circuit when normal operation of divider valve resumes.