Cardinal 225 Installation And Technical Manual

Also see for 225: Installation and technical manual Installation, Set-Up and Operation Manual

Contents

Cardinal 225 Installation And Technical Manual Manual pdf 11 page image

SITE PREPARATION, CONT.The Model 225 Weight Indicator is a precision weight-measuring instrument. As with anyprecision instrument, it requires an acceptable environment to operate at its peak performanceand reliability. This section is provided to assist you in obtaining such an environment.Electrical PowerThe 225 has been designed to operate from 90 to 264 VAC at 50/60 Hz. Note that a specialorder is UnotU required for operation at 230 VAC.CAUTION! - To avoid electrical hazard and possible damage to the indicator,DO NOT, under any circumstance, cut, remove, alter, or in any way bypass thepower cord grounding prong.On installations requiring 230 VAC power, it is the responsibility of the customer to have aqualified electrician install the proper power cord plug which conforms to national electricalcodes and local codes and ordinances.The power outlet for the indicator should be on a separate circuit from the distribution panel.This circuit should be dedicated to the exclusive use of the indicator. The wiring shouldconform to national and local electrical codes and ordinances and should be approved by thelocal inspector to assure compliance.To prevent electrical noise interference, make certain all other wall outlets for use with airconditioning and heating equipment, lighting or other equipment with heavily inductive loads,such as welders, motors and solenoids are on circuits separate from the indicator. Many ofthese disturbances originate within the building itself and can seriously affect the operation ofthe instrument. These sources of disturbances must be identified and steps must be taken toprevent possible adverse effects on the instrument. Examples of available alternatives includeisolation transformers, power regulators, uninterruptible power supplies, or simple line filters.Transient SuppressionThe following recommendations will help to reduce transients:y Always use shielded cables to connect signal wires to the weight indicator.y Secure the cables in the cable clips provided inside the indicator.y Connect the cable shield (indicator end only) to a ground point inside the indicator.Keep wires that extend beyond the shield as short as possible.y Do not run load cell or signal cables from the weight indicator along side or parallel towiring carrying AC power. If unavoidable, position the load cell and signal cables aminimum of 24" away from all AC wiring.y Always use arc suppressors across all AC power relay contacts (see recommendationsat HUhttp://www.paktron.com/pdf/Quencharch_QRL.pdfUH).y Use zero voltage switching relays, optically isolated if possible.8200-M538-O1 y 225 Installation Page 7