Pulsafeeder Pulsar DLC - Manual (Page 8)

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2. Safety Considerations
The DLC is a sophisticated microprocessor based controller for use only with PULSAR diaphragm
metering pumps. It yields tremendous control capacity – electrical, mechanical and (in conjunction with
the PULSAR pump) hydraulic in nature. In consideration of SAFETY, you should be mindful of this
relative to your safety, that of co-workers and of the process environment. Consider the following prior to
the installation and operation of a DLC controlled PULSAR metering pump.
2.1 General Safety
The DLC was designed as a stroke length position actuator for operation solely with the PULSAR
metering pump. Use for any other application is considered un-safe and voids all certification markings
and warranties.
2.1.1 Explosive Atmosphere Safety
Explosion Hazard -- Do not perform installation or maintenance of any kind on this device while
circuit is live and/or the area is known to be hazardous.
With the proper marking, this equipment is suitable for use in Class I, Division 2, Groups C & D; Zone
2, Groups IIA and IIB or non-hazardous locations only.
2.1.2 Electrical Safety
The DLC can be considered an industrial stroke length. Improper application and use can be
hazardous. You are solely responsible for its use.
The DLC's electrical installation must conform to all relevant electrical codes. Installation and
electrical maintenance must be performed by a qualified electrician. Before installing or servicing this
device, all power must be disconnected from the source at the main distribution panel.
The DLC emits electro-magnetic energy and generates radio frequency interference. Its use is
restricted to industrial applications. You are responsible for shielding this energy/interference.
2.1.3 Mechanical Safety
When properly installed, the device has only one externally accessible moving part – the hand
adjustment knob. This component is under computer control and as such may actuate without warning.
Care should be taken to keep loose clothing away from this component. Hands and fingers should be
kept clear while the knob is turning under DLC control.
The DLC was designed to be service free. It contains no user-maintainable components. Removal of
the entire DLC as an assembly from the pump is permissible. Do not disassemble the DLC enclosure
unless instructed to do so in Section 13 of this manual. Evidence of unauthorized disassembly shall
void the warranty.
2.1.4 Hydraulic Safety
Thoroughly review and adhere to the contents of the PULSAR Installation, Operation, Maintenance
and Instruction manual (Bulletin No. PMP-IOM-96) for hydraulic installation of your PULSAR
metering pump. As a microprocessor controlled device, the DLC may activate the pump motor without
warning – generating hydraulic pressure and fluid flow. Care should be taken to protect both users and
systems should the pump activate.