SERIES 8400 OPTALARM™ USER`S MANUAL KEY INSTRUMENTS
Contents
1. Functions of Components 2 SPECIFICATIONS Dimensions 9 81 in 249 2 mm 2 03in 51 6 mm 1 88 in 47 8 mm Flow Ranges Available 50 CCM to 134 LPM 0 6 CCM to 4 25 LPM Meter Accuracy 3 of full scale STP 1 of full scale any calibrated conditions Repeatability of Alarm e 0 5 Full Scale Environmental Conditions 42 to 158 F 5 6 to 70 C 32 to 158 F 0 to 70 C 35 to 85 relative humidity non condensing Contact Ratings 175 VDC 250 mA 1 Amp 5 VA ssam ON OFF RESET Alarm Reset 7 7 7 RESET Alarm Reset 7 7 7 bape ON OFF RESET Alarm Reset 7 7 7 7 NOTE If both HI and LOW Alarms have been tripped the ON OFF RESET button must be depressed twice to reset both alarms Figure 3 Indexing Sequence for ON OFF RESET Button ON OFF 4 FEATURES dje Operation Modes Key Instruments Optalarm is capable of operating in three different modes Depressing the ON OFF RESET button will index the unit sequentially through its modes Reference Figure 3 Indexing Sequence for ON OFF RESET Button The first mode is the HI LOW Mode In this mode both sensors are actively scanning for an interruption by the float This mode of operation can be used when the flowrate must be maintained2. the alarm and the unit will return to normal operation
3. CIFICATIONS CLEANING THE FLOW TUBE Occasional cleaning may be required if dirt appears in the flow tube or if float movement becomes restricted Turn unit off and disconnect the power supply Do not allow any liquids to enter the electronics Bed off any pressure in the flowmeter and disconnect the flowmeter from the system to ensure safety Next remove the lens cover Figure 4 1 by removing the four screws Figure 4 2 located at the top and bottom of the cover With a 5 32 Allen wrench turn the jackscrew Figure 4 7 counter clockwise until it reaches a stop Gently remove the flow tube Figure 4 3 from the frame Using extreme care remove the top and bottom float stops Figure 4 5 and 10 and remove the float Clean the tube with a mild liquid detergent and a soft brush or swab Rinse flush with clean water and dry thoroughly with clean dry ait or nitrogen Make sure that all of the parts are thoroughly cleaned and dry Re install parts as follows bottom float stop the longer of the two float stops from bottom of glass tube ball float Figure 4 4 and top float stop Check the top and bottom gasket Figure 4 6 and replace if necessary Reposition the gaskets into the block and carefully reinsert the flow tube into the meter frame Be sure that the tube is properly positioned with the scale facing forward Gently press against the tube alignment guides Figure 4 9 until they are tight against the back of the meter f
4. This manual has been developed by the Key Instruments and is intended for the use of its customers and service personnel The information in the manual is subject to change without notice While every effort has been made to eliminate errors Key Instruments disclaims liability for any difficulties arising from the interpretation of the information contained herein For Technical Customer Support Service please call 1 800 356 7483 Printed in U S A 11 05 IDT158 Rev 004 K SERIES 8400 OPTALARM USER S MANUAL KEY INSTRUMENTS 1 800 356 7483 www keyinstruments com WARRANTY The Seller warrants all parts will be free from defects in workmanship or material under normal use and service for a period of one year from date of shipment Liability under this warranty is limited to repair or replacement F O B factory of any parts which prove to be defective within that time or repayment of the purchase price at the Seller s option provided the products have been returned transportation prepaid within one year from date of purchase Product recommendations are based on data and information which the Seller believes to be correct and are intended for use by individuals having knowledge and expertise as to their application Seller is not liable beyond replacement of equipment F O B factory or the full purchase price This warranty is void if the instrument or equipment is abused altered used at ratings above th
5. between two limits An additional application for this mode is a two tier monitoring mode As described above both sensors are actively scanning for an interruption by the float however the float is located either above or below both sensors in this method of operation For example if the flowrate drops below the Upper Sensor the first alarm will sound This method of operation used in conjunction with the 8 Pin Mini DIN connector will warn the operator that the flowrate has fallen to a potentially problematic level If the flowrate continues to decrease to an unacceptable level the Alarm for the Lower Sensor will sound and the 8 Pin Mini DIN Connector can be used to pause the process or start an alternate process The second mode is the HI Mode In this mode the Upper Sensor is the only sensor that is actively scanning for an interruption by the float This mode can be used to monitor systems that require the flowrate to stay below a maximum preset level The third mode is the LOW Mode In this mode the Lower Sensor is the only sensor that is actively scanning for an interruption by the float This mode can be used to monitor systems that require the flowrate to stay above a minimum preset level Sensor Status Both Upper and Lower Sensors are actively scanning for an interruption by the float Uppers Sensor is aciei scanning for an Lower Sensor is actively scanning for an Alarm Modes e The Optalarm is equi
6. e specified maximum or is misused in any way THIS EXPRESSED LIMITED WARRANTY EXCLUDES ALL OTHER REPRESENTATIONS MADE BY ADVERTISEMENTS OR BY AGENTS AND ALL OTHER WARRANTIES BOTH EXPRESS AND IMPLIED THERE ARE NO IMPLIED WARRANTIES OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE FOR GOODS COVERED HEREUNDER Power Requirements e Wall Transformer Power Supply 12 VDC 500 mA Connector and pin out description e The Optalarm is provided with a female 8 position Mini DIN connector for output signal acquisition The pin configuration for the connector is as follows e A pre assembled single ended cable assembly pigtail is available to interface 2 1 Figure 5 8 Pin Mini DIN as seen from side of Optalarm the Optalarm outputs to an external alarm Part No ELA001 1 Ground Ground Brown 2 LOW Limit Dry Contact LOW Limit Dry Contact Red Open Closed 3 LOW Limit Dry Contact LOW Limit Dry Contact Orange Common Common 4 External DC Power External DC Power Yellow 5 HI Limit Dry Contact HI Limit Dry Contact Green Closed Open 6 HI Limit Dry Contact HI Limit Dry Contact Blue Common Common 7 LOW Limit Dry Contact LOW Limit Dry Contact Purple Closed Open 8 HI Limit Dry Contact HI Limit Dry Contact Black Open Closed 10 Table of Contents DESCRIPTION IDENTIFICATION OF COMPONENTS FEATURES OPERATION CLEANING THE FLOW TUBE SPE
7. nd the float material should also match the specification on the Flow Curve Data Sheet OPERATION gg Adjust the HI Alarm Set Pointer by turning the HI Alarm Adjustment Knob to the desired high flow limit to be monitored Adjust the Low Alarm Set Pointer by turning the Low Alarm Adjustment Knob to the desired low flow limit to be monitored Adjust the Valve so the ball float rises to the pre determined set point Supply the Optalarm with Power either by using the 8 pin Mini DIN or by using the supplied power jack Turn the Optalasm on by pressing the On Off Reset button once Both upper and lower LEDs will be on steady which indicates that the unit is in HI LOW mode Pressing the On Off Reset button a second time will turn the lower LED off which indicates that the unit is set in HI mode Pressing the On Off Reset button a third time will light only the lower LED which indicates that the unit is in LOW mode Pressing the On Off Reset button a fourth time will turn the unit off If the float crosses a limit level the appropriate LED will start flashing and the audio alarm will start sounding Pressing the On Off Reset button will reset that alarm If both limits are crossed both LEDs will flash and the alarm will sound at a high rate Press the On Off Reset button twice to silence the alarms If during operation the audio alarm sounds a steady tone the unit has detected interference Remove the source of the interference reset
8. pped with a 90 dB Maximum audible signal that sounds when the flow deviates from the preset range The two indicator LEDs and the audible signal produce four distinctive alarm conditions Beeping at Float has crossed LOW Flashi Beeping at Float has crossed HI Limit i Beeping at Float has crossed both 4 On On Continuously Interference has been On detected Alarm Outputs e This feature has been designed to work in conjunction with the flashing LEDs and audible signals There is one normally open NO and one normally closed NC contact for each alarm condition for applications that require a dry contact to drive relatively low voltage and low current load selected options such as relays solenoids LEDs etc While in operation relays are in an energized state when an alarm condition or power failure occurs the relays return to their unenergized normal position Millimeter Reference Scales e The meters are supplied with flow curves for air and water On request flow cutves for other gases or liquids can be supplied and direct read scales are available on a special order basis e To ensure accurate flowrate readings on all flowmeters with millimeter scales the following should be verified the tube part number and revision level printed on the top of the tube for example 1G04 R4 should correspond with the tube number and revision level on the Flow Curve Data Sheet The gas or liquid flowing through the meter a
9. rame Tighten the jackscrew by turning clockwise with the Allen wrench until the gaskets make contact with the tube Carefully tighten 3 4 turn more or torque to 1 1 75 in lbs to achieve a positive seal Do not over tighten If any liquid enters the electronics be sure unit is thoroughly dry before reconnecting power cord Finally replace the lens cover onto the meter secure it properly and then reconnect the meter back into the flow loop Lens Cover Lens Cover Screws Flow Tube Ball Float Top Float Stop Top and Bottom Gaskets Jackscrew Upper and Lower Sensors SOl CO NI DY Gr BY G2 LD ke Tube Alignment Guides jai j Bottom Float Stop Figure 4 Flowmeter Assembly 8 DESCRIPTION The Optalarm is a flow monitoring device that allows the user to set gas or liquid flow parameters Any deviation from the preset flow parameters is indicated by the appropriate flashing LED and by a 90 dB audible signal The 8 Pin Mini DIN Connector can also be used to drive external sirens and switches and also to supply power to the unit The Upper and Lower Sensors continuously monitor the flow parameters which have been selected from the supplied Flow Curve and Correlation Data To operate the unit use the Set Point Adjustment Knobs Figure 1 1 to adjust the Upper and Lower Sensors Figure 1 2 to the pre determined flow points The valve is then opened
10. until an acceptable flowrate is obtained Once the flowrate has been set the On Off Reset button Figure 1 3 is used to select the operation mode and begin monitoring The instrument is capable of detecting a float moving at speeds up to 400 ft second s g oo g Fi JE a Figure 1 IDENTIFICATION OF COMPONENTS 8 PIN MINI DIN CONNECTOR HI ALARM SET POINT ADJUSTM ENT KNOB HI ALARM LED ON OFF RESET BUTTON 6 HI ALARM SET POINTER LOW ALARM SET POINTER LOW ALARM LED FLOW CONTROL VALVE LOW ALARM SET POINT ADJUSTMENT KNOB POWER JACK 7 De on mgng Ng ig J 1 8 Bia Mini DLN Used for Remote Data Acquisition Connector 2 HI Alarm Adjustment Used to Position HIGH Alarm Set Knob Point Turns on in Steady State at Start up 3 PTARANTED Flashes when HI Alarm is Tripped 4 ON OFF Reset Button Used to Toggle through Operating Modes 5 HI Alarm Set Pointer Indicates Point on Scale for which HI Alarm will sound 6 LOW Alarm Set Pointer Indicates Point on Scale for which LOW Alarm will sound Turns on in Steady State at Start up 7 TOW Alarm LED Flashes when LOW Alarm is Tripped 8 Flow Control Valve Controls the Flowrate through the Unit 9 LOW Alarm Adjustment Used to Position LO Alarm Set Point Knob Used to Supply Power to the 10 Monet Jack Optalarm Figure 2
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