Escort Elf® Pump instruction manual
Contents
1. 4 2 Frit 4 2 Battery Pack 4 2 Figure4 2 Replacing the Battery Pack 4 3 Section 5 ELF Sensor Calibration 5 1 Section 6 ELF Sensor Calibration for Pumps used in the U S Government Mine Safety and Health Administration MSHA Coal Mine Dust Sampling 6 1 Section 7 Repairs and Replacement Parts 7 1 Troubleshooting A WARNING 1 Corrective Table 7 1 Troubleshooting Guidelines Unplugging the Electrical Connectors Reattaching the Electrical Connectors Pump amp Drive Assembly Outlet Dampener or Pressure Sensor Replacement Printed Circuit Control Board Replacement Obtaining Replacement lt Figure 7 1 Replacement Parts Table 7 2 Replacement PartsList Figure7 2 ReplacementParts cont Section 1 General Information Section 1 General Information Introduction The ESCORT ELF Pump introduces a totally new patented concept of flow control and flow readout U S Patent 5 295 790 The heart of this new system is the electronic laminar flow sensor The ELF sensor combines a laminar flow element and a differe2. LAMINAR FLOW SENSOR p EI E EXHAUST FILTER LAMINAR FLOW ELEMENT PRESSURE TRANSDUCER CONTROL CIRCUIT Figure 2 1 Flow Feedback Control System inner walls of the cylinder This difference is monitored by connections to the high and low pressure taps of a sensitive differential pressure sensor The electrical signal from the sen Sor is a linear voltage which is directly related to the air flow through the laminar element This signal is compared to the flow Set point in the electronic circuit and is used to control the flow at the set point Any deviation in flow rate is sensed and the motor power is adjusted to maintain the preset flow rate In the case of a blocked flow or operation beyond the pump capacity where the flow cannot be brought to within 0 1 LPM of the set point the flow fault LED will be lighted 2 2 ESCORT ELF Pump Instruction Manual Section 2 Theory of Operation LED Indicator Operation e The RUN HOLD LED assures the user that the unit is operating even in poorly lit noisy environments e The RUN HOLD LED also indicates the HOLD function If the pump is switched to HOLD the pump shuts down the timer stops and the LED is switched to a blinking mode When the RUN HOLD switch is pressed again the pump will restart and the timer will continue from its hold value e The LOW BATT LED indicates operation of the low battery detecti
3. ing the maintenance procedures described in this manual Failure to do so may seriously impair instrument performance Repair or alteration beyond the scope of these maintenance instructions or by anyone other than a Zefon trained service person could cause the product to fail to perform as designed and persons who rely on this product for their safety could sustain severe personal injury or death Corrective Maintenance When an inoperative part is located by using TABLE 7 1 Troubleshooting Guidelines replace it according to one of the replacement procedures later in this section Also refer to Obtaining Replacement Parts later in this section for information on how to order the necessary part from Zefon ESCORT ELF Pump Instruction Manual 7 1 Section 7 Repairs and Replacement Parts Table 7 1 Troubleshooting Guidelines 1 Inlet filter clogged or 1 Replace filter blocked with water according to Checking ON HOLD LED the Inlet Filter indicator turns OFF prematurely FLOW 2 Battery pack is degraded 2 Install new pack on FAULT LED pump by performing Indicat b procedure described under Battery Pack Replacement LOW BATT LED is turned 3 Operation beyond flow 3 Reduce flow or replace and load limits sampler with lower load device 1 Pump motor connector 1 Check connector improperly plugged into ON HOLD LED PC board e 2 Pressure sensor 2 Check connector Ver
4. the protective rubber plug and charge the battery pack for 14 to 16 hours Note that charging for longer periods will not reduce battery life provided the charging is performed at room tempera ture The battery pack can be charged with the pack removed from the pump Always replace the rubber plug after charging and before using the pump to prevent water entry into the jack WARNING Do not charge the battery pack in areas that may contain a flammable mixture of combustible gases vapors or dust and air otherwise an explosion may occur because a source of ignition exists during charging CAUTION Use only a Zefon MSA Omega Q charger from Zefon MSA to charge the pump Operating Time The maximum expected operating time for a pump with a fully charged battery pack depends on 1 The selected flow rate 2 The vacuum load imposed by the sampling device 3 The temperature 4 The age of the battery pack ESCORT ELF Pump Instruction Manual 3 1 Section 3 Operation 2 5 N FLOW RATE LPM m 1 0 INCHES OF WATER VAM AT PUMP IMET 7 8 10 11 12 EI 14 15 OPERATING HOURS Figure 3 1 Typical Operating Time Graph See FIGURE 3 1 for approximate operating times The shaded area shows operating loads and flow rates within the pump specifications The example shown with dashed lines is for a pump set for 2 0 LPM with a sampling load of 15 the expected maximum operating time wou
5. Escort EIf Pump instruction manual AWARNING THIS MANUAL MUST BE CAREFULLY READ BY ALL INDIVIDUALS WHO HAVE OR WILL HAVE THE RESPONSIBILITY FOR USING OR SERVICING THE PRODUCT Like any piece of complex equipment this product will perform as designed only if it is used and serviced in accordance with the manufacturer s instructions OTHERWISE IT COULD FAIL TO PERFORM AS DESIGNED AND PERSONS WHO RELY ON THIS PRODUCT FOR THEIR SAFETY COULD SUSTAIN SEVERE PERSONAL INJURY OR DEATH The warranties made by Zefon International Inc with respect to the product are voided if the product is not used and serviced in accordance with the instructions in this manual Please protect yourself and others by following them We encourage our customers to write or call regarding this equipment prior to use or for any additional information relative to use or repairs In the U S contact Zefon at 1 800 282 0073 To contact Zefon outside the U S dial 1 352 854 8080 or email at ZefonCS zefon com Zefon International Inc 2011 All Rights Reserved PRODUCT OF U S Zefon International Inc 5350 SW 1st Lane Ocala FL 34474 L Rev 7 IMZ001 034 813549 WARNINGS 1 Do not charge the battery pack in areas that may contain a flammable mixture of combustible gases vapors or dust and air otherwise an explosion may occur because a Source of ignition exists during charging 2 Do not operate the pump in oxygen enriched atmospheres
6. O PART COMPONENT PART NO FIGURE 4 1 Upgrade Kit includes printed circuit board and 814029 pump face assemblies Battery Pack includes O ring amp Plug 10087242 FIGURE 4 2 ESCORT ELF Pump Instruction Manual 7 7 Section 7 Repairs and Replacement Parts Figure 7 2 Replacement Parts cont Table 7 2 Replacement Parts List cont PART COMPONENT PART NO 802922 Screws belt clip Polyethylene Discs O Rings filter cover Inlet Filters 7 8 ESCORT ELF Pump Instruction Manual Zefon INTERNATIONAL To contact Zefon International call 1 800 282 0073 Zefon International Inc 2011 All Rights Reserved PRODUCT OF U S Zefon International Inc 5350 SW 1st Lane Ocala FL 34474
7. able battery pack a motor driven pump the ELF sensor and the electronic circuit to control and display the flow rate The battery pack consists of four rechargeable cells The cells are connected in series with a current limiting resistor to allow use in hazardous atmospheres See Warnings The pack also has a PTC resistor which functions as a self resetting circuit breaker to prevent damage to the pack if the output terminals are acciden tally shorted A thermal cutoff protects against damage from high temperature conditions in the NiMH battery pack The motor driven pump consists of an inlet pulsation damp ener a diaphragm pump and silicone rubber inlet and exhaust valves The diaphragm is driven by the motor to make one pump stroke with each revolution The pulsation dampener acts as an elastic storage chamber to smooth the individual pump pulses to minimize their effect on the sampling devices connected to the pump inlet The ELF sensor consists of a laminar flow element and a pressure sensor All of the air flow through the pump passes from the exhaust port of the pump and through the laminar flow element The element is a hollow cylinder of porous stainless steel The air flowing through the narrow passages in the cylin der produces an air pressure difference between the outer and ESCORT ELF Pump Instruction Manual 2 1 Section 2 Theory of Operation INLET AIR SAMPL ING DEVICE PUMP QUTL INE
8. alibration Check pump inlet filter for dust replace if heavily loaded Turn ON the pump and allow it to reach its flow rate setting If the pump is not set for 2 50 LPM set it to 2 50 Allow the pump to operate for 10 to 15 minutes at 2 50 LPM To check for leaks temporarily block the pump inlet 0 02 LPM or less should be displayed If not check the inlet filter cover and o ring for correct assembly 02 P 5 Leave the pump set for 2 50 LPM and turn OFF the pump 6 Connect a primary calibration standard to the pump 7 Turn ON the pump as the pump goes through its self check sequence press and hold the ON OFF and RUN HOLD switches simultaneously until the display reads CAL Immediately release both buttons NOTE Failure to release both buttons will turn OFF the pump The display will show CAL and a countdown sequence of numbers from 9 through 0 thereafter it will alternately display CAL and 2 50 LPM 8 Operate the calibration standard and obtain at least six readings which are very close to one another 9 Usethe f and 1 switch buttons to step the pump display up or down until it agrees exactly with the average of the six readings 10 Turn OFF the pump the ELF sensor is now calibrated Repeat monthly or every 200 hours of use ESCORT ELF Pump Instruction Manual 5 1 Section 5 ELF Sensor Calibration 11 When you next turn ON the pump the operating hours will be reset to 0 and be displayed during t
9. be damaged 2 Use only a Zefon or MSA Omega Q Charger to charge the pump 3 If after thoroughly reading this manual you are uncertain of the installation operation or maintenance procedures call 1 800 282 0073 for assistance Table of Contents Section 1 General Information 1 1 2110970 x obe ERRARE CORRER 1 1 Operating 5 lt 1 2 Section 2 Theory of 2 1 Introdu ctlon ess serrer trn kem Rae 2 1 Functional Description of Operation 2 1 Figure 2 1 Flow Feedback Control System 2 2 LED Indicator Operation 2 3 Section 3 3 1 Charging the Battery 3 1 ZS WARNING ipe ERR 3 1 ANOAUTION entem m 3 1 Operating TIme ss sime ok 3 1 Personal Area 3 2 Figure 3 1 Typical Operating Time Graph 3 2 Operating the 3 3 Section 4 Routine 4 1 Periodic 4 1 Checking the Inlet 4 1 Figure 4 1 Checking the Inlet Filter 4 1
10. ency of the checks should depend on the amount of pump usage and the concentration of particles allowed to enter the pump Usually only the dust filter needs to be replaced The Teflon water filter should rarely need to be replaced The water filter is very fragile and must be handled with care Even a tiny pin hole will destroy its function The filter frit should never need to be replaced if the other filters are maintained Filter Replacement 1 Remove the four screws holding the filter cover and O ring 2 Replace the filter with a new one 3 Re assemble the O ring and cover Frit Replacement 1 Stab the frit center with a small screwdriver and lift it out 2 Press in anew frit 3 Re assemble the Teflon and dust filters O ring and cover Battery Pack Replacement FIGURE 4 2 illustrates the battery pack 1 Remove the two screws securing the battery pack to the case 2 Separate the pack from the case 3 Make sure that the O ring is in place on the replacement pack Then slide the pack into the pump case while pressing the case front and back to make sure the case edges go inside the edges of the pack 4 Insert the two screws and tighten Teflon is a trademark of the du Pont Company 4 2 ESCORT ELF Pump Instruction Manual Section 4 Routine Maintenance Figure 4 2 Replacing the Battery Pack ESCORT ELF Pump Instruction Manual 4 3 Section 5 ELF Sensor Calibration Section 5 ELF Sensor C
11. h buttons NOTE Failure to release both buttons will turn OFF the pump e The display will show CAL and a countdown sequence of numbers from 9 through thereafter it will alternately display CAL and 2 00 LPM ESCORT ELF Pump Instruction Manual 6 1 Section 6 ELF Sensor Calibration for Pumps Used MSHA Coal Mine Dust Sampling Program 8 Operate the calibration standard and obtain at least six readings which are very close to one another 9 Use the f and 1 switch buttons to step the pump display up or down until it agrees exactly with the average of the six readings 10 Turn OFF the pump the ELF sensor is now calibrated Repeat every 200 hours of use 11 When you next turn ON the pump the operating hours will be reset to 0 and will be displayed during the lighting of the FLOW FAULT and LOW BAT LEDs 6 2 ESCORT ELF Pump Instruction Manual Section 7 Repairs Replacement Parts Section 7 Repairs and Replacement Parts Troubleshooting TABLE 7 1 Troubleshooting Guidelines lists the symptoms of the most common problems it also lists their probable cause s and the action required to correct each problem Use the guidelines if you cannot calibrate the ESCORT ELF Pump or if the pump does not operate properly If you cannot resolve a problem by using the guidelines call 1 800 282 0073 to locate a local Zefon Repair Center WARNING Use only genuine Zefon replacement parts when perform
12. he lighting of the FLOW FAULT and LOW BAT LEDs The Bios DryCal or Bios Defender should be used to calibrate or check the flow rate of an Zefon Escort ELF pump only if an isolating flow restrictor e g a filter or an orifice such as P N 632646 providing at least 10 WC is placed in line between the pump and the calibrator Failure to use such an isolation technique can cause a calibration inaccuracy on the order of 2 and is not recommended 5 2 ESCORT ELF Pump Instruction Manual Section 6 ELF Sensor Calibration for Pumps Used MSHA Coal Mine Dust Sampling Program Section 6 ELF Sensor Calibration for Pumps Used in the U S Government Mine Safety and Health Administration MSHA Coal Mine Dust Sampling Program Check pump inlet filter for dust replace if heavily loaded Turn ON the pump and allow it to reach its flow rate setting If the pump is not set for 2 00 LPM set it to 2 00 a O gt Allow the pump to operate for 10 to 15 minutes at 2 00 LPM To check for leaks temporarily block the pump inlet 0 02 LPM or less should be displayed If not check the inlet filter cover and o ring for correct assembly 5 Leave the pump set for 2 00 LPM and turn OFF the pump 6 Connect a primary calibration standard to the pump 7 Turn ON the pump as the pump goes through its self check sequence press and hold the ON OFF and RUN HOLD switches simultaneously until the display reads CAL Immediately release bot
13. htening the lower screw when installing the new pump and drive Printed Circuit Control Board Replacement 1 2 Remove the two screws securing the battery pack Remove the battery pack is a trademark of Swagelok Company 7 4 ESCORT ELF Pump Instruction Manual Section 7 Repairs Replacement Parts 3 Remove the two screws securing the pump case 4 Pull the connector from the pressure sensor 5 Pull the motor electrical connector from the printed circuit board 7 Remove and save the three screws two washers and spacer securing the PC board to the pump face 8 Install the replacement printed circuit board by reversing this procedure NOTE Be sure the battery connector is mounted with the black wire towards the top of the case Obtaining Replacement Parts The ESCORT ELF Pump parts and part numbers are listed in TABLE 7 2 To obtain parts service or information in the U S call Zefon International at 1 800 282 0073 To reach Zefon outside the U S call 1 852 854 8080 ESCORT ELF Pump Instruction Manual 7 5 Section 7 Repairs and Replacement Parts SNUG THIS SCREW FIRST NOTICE MAKE SURE BATTERY CONNECTOR BLACK WIRE IS TOWARD Figure 7 1 Replacement Parts 7 6 ESCORT ELF Pump Instruction Manual Section 7 Repairs Replacement Parts Table 7 2 Replacement Parts List FIGURE 7 1 e s 588 s sw FIGURE 7 2 ITEM N
14. ify E connector fault five pins are plugged in indicators turned ON and pump 3 Pump motor inoperative 3 Replace pump and will not run or if motor drive assembly it does run no according to procedure flow is displayed under Replacing the on readout Pump and Drive Assembly 4 Pressure sensor or 4 Replace sensor or PC PC board inoperative board 1 Sample flow leaks 1 Check for leaking tube When inlet is connection or O ring blocked the flow seal at the inlet filter indication is not cover 0 02 LPM or less LED indi 1 Power source inactive 1 Check and correct cause indicator on of power loss charger does not turn ON when plug 2 Charger failure 2 Replace charger on line cord is 3 Battery pack failure 3 Replace battery pack by inserted in 115 performing procedure VAC outlet and under Replacing the plug on charging Battery Pack cord is inserted in jack on battery pack 1 Inlet filter partially clogged 1 Replace filter according Desired flow rate to instructions under cannot be Checking the Inlet Filter obtained under 2 Leak exists in sample flow 2 Check for leaking tube heavy sampling connection or O ring at device loads the inlet filter cover within regime of FIGURE 3 1 7 2 ESCORT ELF Pump Instruction Manual Section 7 Repairs Replacement Parts Unplugging the Electrical Connectors Service procedures which require opening the ELF pump case require the unplugg
15. ing of two electrical connectors 1 2 Pull on the motor electrical connector to remove the motor wires from the printed circuit board Pull on the 5 pin ribbon cable to remove the connector from the ELF sensor Reattaching the Electrical Connectors 1 When reattaching the motor connector make sure the angular ramp at the end faces towards the latch projecting from the printed circuit board socket NOTE The pump will operate with the connector installed the other way but the above method is encouraged because the ramp and latch help keep the connector attached as the pump is knocked around during use When reattaching the connector to the ELF sensor make sure pins 1 through 5 are straight and in line NOTE If these pins are bent use needle nose pliers to straighten and align them Pin 6 is intentionally cut off because it is not used in the ELF pump Pull the cable so that the end of the connector is about 7 8 above the printed circuit board Hold the pump face in the right hand and position your thumb and forefinger around the top left hand corner of the pump face Hold the connector with these two fingers and hold the pump case with the left hand Position the connector so that an end pin is just inside the funnel opening of the corresponding pin socket Gradually tilt the connector to get the next pin just inside its socket and repeat this process until all five pins are just inside their corresp
16. ld be 11 5 hours This figure is based on room temperature operation with a new pack At 0 degrees Centigrade the operating time will be reduced by 10 20 at 20 C After several hundred charge discharge cycles the pack capacity may be reduced by 20 Personal Area Sampling The ESCORT ELF Pump is designed for either personal or area sampling of ambient air It automatically provides a constant volumetric flow rate of the sample air through the sampling device filter disc impinger or absorbent tube to measure the concentration of airborne mists dusts particulates gases and vapors in the workplace 3 2 ESCORT ELF Pump Instruction Manual Section 3 Operation Operating the Pump 1 Charge the battery pack for 16 hours using the Zefon MSA Omega Q Charger e Read the WARNING on the battery pack Connect the desired sampling device to the inlet fitting Press ON OFF button until the RUN HOLD LED lights e Flow Fault Low Bat LEDs will then light During the time these LEDs are lighting a number from 0 to 999 will be displayed This is the total of the pump s operating hours since its last calibration e When all three LEDs are lighted the display changes to 8 88 LPM MINS to show all segments are functional e The pump will then begin operation The LOW BAT LED will be dark if the battery voltage is above 4 1 volts The Flow Fault LED will be dark when the flow rate is within 0 1 LPM of the setp
17. mended RECHARGE TIME chargers CHARGING TEMPERATURE TYPICAL BATTERY PACK LIFE OPERATING AND PHYSICAL CHARACTERISTICS Volumetric flow rate is controlled at the set point FLOW CONTROL with automatic compensation for battery voltage altitude temperature and sample load changes 0 5 TO 3 0 LPM 2 4 ampere hour NiCd or 2 8 ampere hour NiMH 10 to 30 C 50 to 86 F 300 or more charging cycles OPERATING 5 to 30 inches water load up to 1 0 LPM RANGE up to 30 inches of water load up to 2 0 LPM up to 20 inches of water load up to 2 5 LPM and up to 10 inches of water load up to 3 0 LPM When flow is blocked the FLOW FAULT LED indicator lights and stays lighted until the cause of flow blockage is removed If blocked for longer than FLOW BLOCKAGE 1 5 minutes the pump shuts down Pumps may be DETECTION ordered that are not factory programmed to shut down upon blockage however pumps configured this way are NOT suitable for coal mine dust sampling by mine operators Liquid crystal digital display with 0 01 LPM resolution from 0 5 to 3 0 LPM FLOW READOUT Accuracy 2 5 from 1 0 to 3 0 LPM 0 to 45 C 5 from 1 0 to 3 0 LPM 20 to 0 C and 45 to 65 C 5 from 0 5 to 0 9 LPM 0 to 45 1 2 ESCORT ELF Pump Instruction Manual Section 1 General Information Operating Specifications Quartz controlled timer reads out to 999 minutes in 1 minute steps Holds last reading after either flow fault
18. more than 2196 oxygen containing combustible gases vapors or other materials Fire or explosion can result from operating in these atmospheres 3 Operate the pump with Zefon MSA P N 497702 or 10087242 battery pack only Do not use other batteries or power sources 4 When using the pump in a hazardous area with respect to fire or explosion as specified in the National Electric Code NEC Article 500 Hazardous Classified Locations the pump must be labeled stating that it meets the design criteria of the specific Class Division and Group Users must operate the pump in accordance with the instructions for that Class Division and Group A copy of the NEC Code can be obtained from the National Fire Protection Association Batterymarch Park Quincy MA 02269 5 Use only genuine Zefon replacement parts when performing maintenance procedures described in this manual failure to do so may seriously impair the ESCORT ELF Pump performance Repair or alteration beyond the scope of these maintenance instructions or by anyone other than authorized Zefon service personnel could cause the product to fail to perform as designed and persons who rely on this product for their safety could sustain Severe personal injury or death FAILURE TO COMPLY WITH THE ABOVE WARNINGS CAN RESULT IN SERIOUS PERSONAL INJURY OR DEATH CAUTIONS 1 Do not use the pump with organic fluids in an impinger without an absorber trap otherwise the pump will
19. ntial pressure sensor to measure sample volume flow rate This measure of flow rate is not affected by changes in sample loading or the other factors that affect rotameter type indicators used in other pumps The ELF sensor provides an electronic signal which is linearly related to flow rate This signal is used in the pump control circuit to maintain the chosen flow rate constant to within 2 5 and is used in the readout circuit to allow the digital display of the actual flow rate to within 0 1 liters per minute LPM The ESCORT ELF sensor and control circuitry are very stable both in storage and use Together they form a secondary standard to maintain the calibration accuracy for at least 200 hours of pump usage A built in operating time totalizer helps remind the user of the total operating hours since the last calibration check was performed against a primary flow standard This totalizer automatically resets to 0 when calibration is performed If the pump is used in the coal mine dust sampling program these calibration checks should be done after each 200 hours of use If the pump is used for OSHA compliance sampling the recalibration should be performed monthly ESCORT ELF Pump Instruction Manual 1 1 Section 1 General Information Operating Specifications ELECTRICAL CHARACTERISTICS POWER SUPPLY 4 8 volt battery pack of four NiCd or NiMH cells BATTERY PACK CAPACITY BATTERY PACK 14 16 hours overnight with recom
20. oint Use the and switch buttons to adjust the flow setpoint if a new flow rate is desired When either button is pressed e RUN HOLD LED will be dark e Display will show the flow setpoint being stepped up or stepped down to the new setpoint The RUN HOLD button may be pressed to interrupt sampling without causing the timer to reset to zero Press the ON OFF button at the end of sampling e Total sample minutes will be on the display and will remain until the pump is turned ON again Check calibration monthly every 200 hours of use for coal mine dust sampling Operate the pump with a sampling device connected to the inlet Operation without a sampler attached will reduce the life of the pump inlet filter Operation at very low flow rates may be unstable without an attached sampling device Such as a charcoal tube ESCORT ELF Pump Instruction Manual 3 3 Section 4 Routine Maintenance Section 4 Routine Maintenance Periodic Maintenance Checking the Inlet Filter The pump inlet contains dust and water filters to protect the pump from particles and water in the sample air FIGURE 4 1 If the filters become clogged the sample flow may be blocked or an extra load placed on the pump therefore check the filters regularly FILTER COVER DUST FILTER O RING TEFLON FILTER Figure 4 1 Checking the Inlet Filter ESCORT ELF Pump Instruction Manual 4 1 Section 4 Routine Maintenance The frequ
21. on circuit When the battery pack drops to 4 1 volts the circuit causes the pump to shut down the timer to stop and the LOW BATT LED to light This limits further battery drain to just a few milliamperes which in turn helps prevent deep discharging and battery pack damage upon recharging It also helps prevent the invalidation of the sample being taken because the timer stores the actual sample time and the flow rate is controlled up to the time of shut down e The FLOW FAULT LED indicates operation of the flow blockage detection circuit If the sample inlet or the sampling device connected to the pump is blocked the FLOW FAULT LED lights until the cause of the flow fault is removed The pump is normally factory programmed so that fault longer than 1 5 minutes will shut down the pump The pump may be restarted from a flow fault shutdown by pressing the RUN HOLD switch Restarting in this manner allows continuation of the sample period without having the timer reset to zero e The Flow Fault LED is lighted whenever the pump flow rate is more than 0 1 LPM different from the set point It is normal for it to be lighted briefly while the pump is started or when a new set point is selected ESCORT ELF Pump Instruction Manual 2 3 Section 3 Operation Section 3 Operation Charging the Battery Pack Use any Zefon MSA Omega charger for example P N 494716 495965 or 801759 for charging the battery pack Remove
22. onding sockets Slowly press the connector onto the pins until they bottom out ESCORT ELF Pump Instruction Manual 7 3 Section 7 Repairs and Replacement Parts 9 Inspect the connector at the top and bottom to make sure all pins are correctly inserted Pump amp Drive Assembly Outlet Dampener or Pressure Sensor Replacement 1 gt 10 11 Remove two screws securing the battery pack to the case Remove the battery pack Remove the two screws securing the pump case Pull the 5 pin ribbon connector from the pressure sensor Pull the motor electrical connector from the PC board Remove the two screws securing the pump mounting collar to the back of the case Lift out the pump and drive while removing the inlet dampener connection from the fitting NOTE A drop of soap solution worked in at the end of the rubber tube makes removal easier and will prevent tearing the rubber tube Remove the two screws securing the pressure sensor Remove the pressure sensor and be careful not to drop it even to the table top Remove the outlet dampener if it is to be replaced Install the replacement pump and drive outlet dampener or pressure sensor by reversing this procedure NOTE Wetting the end of the outlet dampener will make sliding it over the sensor body easier Make sure both cuffs are completely in the grooves NOTE Tighten the upper motor collar screw before tig
23. or low battery shut down and when pump is OFF in HOLD mode resets to zero READOUT automatically when pump is turned ON Timer does not count time when FLOW FAULT LED is lighted IM eem CALIBRATION calibration checks Varies with flow rate sampling device loading and OPERATING TIME temperature Minimum eight hour operation at 2 5 LPM with 20 inch water load See FIGURE 3 1 LOW BATTERY The pump shuts down and lights the LOW BATT FUNCTION LED when battery voltage drops below 4 1 volts TEMPERATURE 0 to 45 C 32 to 113 F 2 5 accuracy 20 to 0 C and 45 to 65 EOMEENSATION 4 to 149 F 112 to 148 F 5 0 accuracy ALTITUDE 2 1 4 inches deep x 4 1 4 inches high x 4 inches wide 5 7 centimeters deep x 10 8 centimeters high x 10 2 centimeters wide Dimensions include switch cover but exclude hose barb and belt clip Case plastic is electrically conductive to reduce radio frequency interference an optional leather case is available for pump protection during rough usage such as underground mining or construction and demolition work areas core IDENTIFICATION Zefon ESCORT ELF Pump Instruction Manual 1 3 Section 2 Theory of Operation Section 2 Theory of Operation Introduction This section describes the operation of the sample flow control and readout circuitry of the ESCORT ELF Pump Functional Description of Operation The ESCORT ELF Pump contains a recharge
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