Instructions - WEN Technology
Contents
1. Inv Relay 1 Closed Inv Relay 2 Closed N Inv Relay 2 Closed Inv i i Figure 2 1 The HPL420 functions in these examples are as follows P Power kW The display shows true power in units of of full scale for the HPL420 as installed Ts Start Delay Timer Ts is used to delay the start of active monitoring until after the start surge is completed The HPL420 assumes that the motor is OFF when measured load kW is below 5 full scale The Ts timer starts when the load reaches 5 and monitoring is disabled for the duration of the Ts period Ts is programmable in the range 0 1 to 25 0 seconds On conclusion of the Ts period monitoring becomes active If P drops below 5 monitoring is immediately disabled and a new Ts period will start as soon as load again reaches 5 L1 Max Limit Max alarm limit programmable in the range 5 to 100 OFF and used in conjunction with the Trl Reaction Timer A Max Limit alarm is tripped if P exceeds L1 for a period Tr1 Max Alarm is indicated by a flashing M ax Limit LED and by switching of Relay 1 status Tr1 Reaction Timer Used in conjunction with the L1 Max Limit and programmable in the range 0 0 to 25 0 seconds Tr1 is time for which the P must remain above the L1 Max Limit before an alarm is declared If P falls below L1 during the Tr1 timer period the timer is re set to zero Note if Tr1 is set to 0 0 seconds actual reaction time will be2. one cycle or approx 16 msec at 60Hz and 20 msec at 50Hz L2 Min Limit M in alarm limit programmable in the range OFF 596 to 100 and used in conjunction with the Tr2 Reaction Timer A Min Limit alarm is tripped when P remains below the L2 Min Limit for a period of time Tr2 Min Alarm is indicated by a flashing Min Limit LED and by switching of Relay 2 status Tr2 Reaction Timer Used in conjunction with the L2 Min Limit and programmable in the range 0 0 to 25 0 seconds Tr2 is time for which the P must remain below the L2 Min Limit before an alarm is declared Hyst s Hysteresis Optional hysteresis function to initiate an automatic reset after an alarm Hysteresis is independently programmable for both L1 and L2 and may be set in the range 2 to 50 96 kW Peak Hold Functions A Max Level If the A up arrow key is depressed while the HPL420 is in monitor mode the display will show the maximum load in kW experienced since the last Ts V Min Level Vice versa for minimum load when A down arrow key is depressed Digital Input Functions S1 Reset A momentary actuation of the S1 Reset function will initiate a Reset Continuous actuation of the S1 Reset function jumper S1 to Gnd activates the optional Hysteresis function allowing automatic resets for control applications S2 Inhibit Actuation of the S2 Inhibit input will disable monitoring for the duration of the actuation The HPL420 will still function a
3. under normal conditions no alarm should occur and then depress the MODE key to select Max Alarm 96 mode While in Max Alarm 96 mode use the A V keys to adjust the alarm limit to a value which is lower than normal running Use the M ODE key to return to Power kW 96 mode and wait The Reaction Timer LED should illuminate and once the reaction time has expired a Max Limit alarm should be triggered When the Max Limit alarm triggers the motor should stop Repeat for Min Limit 8 9 DIP SWITCH FUNCTIONS Program Lock Once the HPL420 has been programmed accidental changes may be prevented by turning the PROGRAM LOCK function on To do this set DIP Switch 1 to the ON position see section 6 2 for access When Program Lock is ON all Setting values may be viewed but not changed The Reset button however remains functional Phase Order Enables alarm function if phase order is reversed Activated by setting DIP Switch 2 to the ON position see section 6 2 for access Phase Asymmetry Enables alarm function if Phases are Asymmetric Activated by setting DIP Switch 3 to the ON position see section 6 2 for access 8 10 USING HYSTERESIS Hysteresis enables automatic resetting which is often used for control functions using logic of the type if power exceeds L1 take action XX until power drops below L1 minus Hysteresis Hysteresis is programmable in the range 2 50 kW if set too low there will be a risk
4. 0081 1 50082 2 61010 1 UL certified to UL508 USA and C22 2 No 14 M91 Canada standards for Industrial Control Equipment 2 Unipower Mains Power 2 Remove face plate snap out with small screwdriver 3 Program switches and reassemble o JZCOUU008 Frontplate SW1 Unit Protected ON SW2 Phase Order Sup ON SW3 Phase Asymmetry Sup ON SW4 Not Used Figure 6 1 22070000 wa He o 0000000 cI 1 1 Cc co S oO 2 N m mn aN Hv 00000 D RA ALTO af mj HPL Unit zy BEEN O n DIP Switch Q Installation Mechanical HPL420 Module The HPL420 unit is typically mounted inside the motor starter enclosure or n existing electrical cabinet The unit is C DKEA 75 E 2 configured to snap BD C directly on to 35mm CJ T DIN rail or may be attached to a panel le k gt using 2 x M4 or 8 screws Figure 7 1 The HPL420 housing is not sealed and must be protected inside an appropriate environmental enclosure The terminal connections are rated for 12 AWG 4mm2 wires max and 7in lb tightening torque Current Transfor
5. 1 5 50 75 HF3A 075 5 15285 il 5 75 100 HF3A 100 5 100 5 il 5 100 150 HF3A 150 5 LO 2 5 il 5 150 Figure 4 2 Note The two ranges given for full load ratings of 15 and 25 Amps require two primary wraps of the current transformer whereas all other ranges require a single through primary Figure 4 3 shows the HF3A current transformers with a single through primary hook up and with two primary wraps When taking multiple primary wraps on the HF3A current trans formers ensure that the wraps are wound to the sides and not across the top or bottom of the current transformer Figure 4 3 5 Installation Electrical 5 1 3 PHASE HOOK UP The HPL420 should be connected directly in front of the motor starter unit and downstream of the motor fuses and or isolation breaker as shown in Figure 5 1 An external current transformer with a secondary rating of 1 or 5 amps must be used if the rated full load motor current is in excess of 8 amps Figure 5 1 shows correct installation using the internal current transformer lt 8A and using an external current transformer gt 8A For correct readings the current measurement must always be made on the L3 leg of the 3 phase supply The direction of the current measurement however is not important Power Down Alarm Blocking When the motor is turned off power drops to zero and a Min Limit Alarm will be triggered if L2 is active Figure 5 1 shows an auxiliary normally closed contact on the motor
6. R1 S Min Limit 96 kw Reaction TR2 S Hysteresis OOff 20n Max kw Min kw Program Lock DIP 1 QOn OQ Off Phase Order DIP 2 QOn Qi Off Phase Asymmetry DIP 3 On QU Off Software Version 3 3 Document Number WT99E010 1999 Wen Technology Inc Raleigh NC USA WENIechnology 8411 Garvey Drive Suite 117 Raleigh North Carolina 27616 919 954 1004 Fax 919 954 1009 WW W Wentec com
7. Unipower HPL420 Digital Power Monitor User s Manual True Motor Power Monitor with e High Trip Alarm e Low Trip Alarm e Dual Relays e Hysteresis Function e Analog Output Typical Applications e Pumps e Fans e Conveyors e Crushers and mixers Broken belt detection CE Listed Contents 1 System Overview 3 2 Functional Description 4 3 Typical Applications 7 4 System Configuration 8 5 Electrical Installation 10 3 Phase Power Connection Alarm Relay States Reset Function Alarm Integration 6 Specifications 13 Technical Specifications DIP Switches 7 Mechanical Installation 14 HPL420 Current Transformer Optional Mounting Accessories 8 Programming 16 9 Troubleshooting 20 10 Set Up Log Sheet 21 WARNING Dangerous voltages are present in motor control panels INSTALLATION MUST BE CARRIED OUT BY QUALIFIED PERSONNEL A WARNING Improper installation or programming can cause damage to the unit and or result in ineffective protection and or nuisance tripping Q System Overview The Unipower HPL420 Digital Power Monitor is a member of the Unipower family of Intelligent Power Control Units designed for supervision and control of motor driven Unipower HPL420 mechanical systems The HPL420 measures true power consumption of 3 phase AC motors single phase versions also available and displays consumption as a percentage of selected power range Power consumption KW
8. an alarm is tripped Figure 5 2 shows the states for the alarm relays when programmed as N Inv States are reversed with Power ON when programmed as Inv Power Max Alarm Max 1 LED Min Alarm Min 2 LED Off No Off No Off On On On No Yes No Off On Off No No Yes Off Off On Relays Programmed N INV Relay 1 LED Off On Off On NC 9 9 bsc e ES C1 10 e e e e Relay 2 LED Off On On Off NC 11 e e C2 12 LE NS i i Figure 5 2 5 3 RESET FUNCTION The HPL420 may be reset by any one of three methods Manual Reset Depress the Reset key on the front panel Remote Reset By wiring an Auxiliary reset button across contacts S1 to GND pins 13 to 15 on the HPL420 a remote reset may be achieved Automatic Reset By wiring a jumper across contacts S1 to GND the HPL420 operates in automatic reset mode with the Hysteresis function active this is typically only used for two point control applications and not for protection applications 5 4 ALARM INTEGRATION In order for the HPL420 to stop the motor in the event of an alarm the alarm relay terminals 9 and 10 11 and 12 must be integrated into the motor starter circuit such that it duplicates the effect of activating the STOP button One possibility is shown in Figure 5 4 where the relay contacts terminals 9 and 10 11 and 12 are connected in series with the STOP button When an alarm occurs eith
9. efore the limits have been set first de activate the high and low alarms by programming the L1 M ax Limit to 10196 and the L2 Min Limit to 096 When a limit is de activated OFF is written in the display Then start the motor and note time delay between pressing start button and stable display reading load the system to max normal operating load and press the A key to note the max running 96 kW value load the system to min normal operating load and press the V key to note the min running 96 kW value Use the values noted to set the remaining program parameters as described below 8 4 TS START TIMER The Ts Start Delay Timer is used to inhibit monitoring during the motor start up surge To determine the appropriate value for Ts start the motor and observe how long seconds it takes for the HPL420 kW 96 display value to stabilize Depress the M ODE key to select Start Timer s and then use the A V keys to adjust Ts value to a duration which is slightly longer than the settling time observed Since monitoring is inhibited while Ts is active always try to set this parameter as low as possible without generating false alarms 8 5 MAX LIMIT TRIP POINT Using the Peak Detect function run the system at its maximum load condition and observe the max normal reading by depressing the A key Set the Max Limit value a few units higher than this value by depressing the M ODE key to select Max Limit 96 and then use
10. er Terminals 9 and 10 or Terminals 11 and 12 change from closed to open In either case it is equivalent to pressing the STOP button and the motor will stop 15 14 he cwe tg oso eee d R PEE ro EE M Bocuse CHIOTS j START cad Q O O O OLO STOP EM HPL420 1 u AS 9 Gz 10 3 2 Sit O2 5 53 Si 13 S2 14 Iik Gnd 15 8 l lout 16 Figure 5 4 O Specifications 6 1 TECHNICAL SPECIFICATIONS Electrical Voltage Range See unit for range Standard ranges 3 x 220 380 460 and 575V Also available 1 x 24V for 420 220V single phase Current Range Internal max 8A External N 1 or N 5 converter Cos o Range 0 1 Frequency Range 45 65 Hz Consumption Supply voltage measurement voltage 3 VA Relay Output 250VAC 5Amp Analog Output 4 20mA 0 500 Ohm electrically isolated from measurement system Listing D C C Listed 6 2 DIP SWITCHES 1 Disconnect Mechanical Housing Polycarbonate 3096 GFR UL94V 1 house Polycarbonate UP94V 2 connector front Mounting Snap on for 35mm DIN rail mounting or panel mounting Protection Class P40 house IP20 connector Terminals 12 AWG max 20A 7in lb torque Operating Temperature Range 45 4122 F 15 gt 450 C Weight 1lb 0 5 kg Dimensions D 3 0 xB2 1 xH 4 3 D 75 x B 56 xH 110 mm CE mark to EN5
11. ing used Catalog Number Phase Use for 50 60 Hz Mains Voltages HPL420 220 3 Phase 208 220 230 240 VAC HPL420 380 3 Phase 380 415 VAC HPL420 460 3 Phase 460 480 VAC HPL420 575 3 Phase 575 600 VAC HPL420 S24 1 Phase 110 120 and 208 220 230 240 VAC Figure 4 1 Note The display full scale for the HPL420 is based on the nominal voltage of the unit e g when using a nominal 220V unit at 208V the display range will read 95 at full load 208 220 in 4 2 CURRENT MATCHING From the motor name plate note the full load current in Amps If full load amperage for the motor is 8 amps or less an external current transformer is not required If the full load current is greater than 8 amps then an external N 1 or N 5 current transformer must be used Refer to Table 4 2 for the appropriate selection of current transformer and current range setting for the HPL420 The HF3A current transformers specified in this table are low voltage through primary devices offered as accessories for the Unipower product line equivalent devices from other manufacturers may be substituted at useris discretion Full Load Current RELO Primary HPL110 Range Effective Range Amps Transformer Primary Secondary Turns Setting Amps 1 Internal ea al 1 1 3 Internal 1 a i 3 3 5 Internal ed al 5 5 8 Internal 1g il 8 8 10 HF3A 050 5 5025 il il 10 15 HF3A 050 5 510 2 2 E 15 25 HF3A 050 5 50 25 2 5 25 30 HF3A 050 5 50 2 5 1 3 30 50 HF3A 050 5 50 5
12. is calculated from the formula rM EN S BI P V3xUxIxcosq The display shows power in units of kW which represent the percentage of full load power range for the unit Control functions comprise two independent and programmable trip functions Low Power Alarm for example to stop a pump in the event of dry running and High Power Alarm for example to stop a feeder when blocked The alarm functions activate independent alarm relays one for high and one for low alarms which may be used to supervise the system being monitored typically stopping the motor to protect the load being driven The HPL420 also lends itself to control applications where a secondary function is initiated by the alarm relays An example of this would be to use the high low alarm relays to speed up or slow down the rate at which material is fed to a crusher to ensure optimum crushing productivity The HPL420 may be configured to monitor any size motor and provides consistent sensitivity across the complete motor load range making it ideal for low trip applications where amp meters are not effective In addition the HPLA20 measurement principle allows it to be used on non sine shaped loads such as Variable Frequency Drives The HPL420 also incorporates an analog 4 20mA output and basic phase fault alarm functions o Functional Description A typical Power vs Time graph for the HPL420 is shown in Figure 2 1 with the Y axis showing power P in un
13. isance alarms persist increase the Tr Reaction Timer associated with the nuisance alarm Alarm trips but motor does Check integration of the HPL420 alarm relay with the not stop motor starter Verify that the HPL420 relay is switching correctly Min Limit alarm trips when This is normal when using a Min Limit alarm function motor is switched off To correct implement the S2 alarm inhibit as described in Section 5 1 Power Down Alarm Blocking Display shows 100 during HPL420 current range is saturating check settings for normal operation Current Range against the motor ratings and correct as necessary HPL420 voltage rating is too low check and install correct HPL420 model Motor is undersized Display decreases when load Check electrical connection and ensure that the increases or vise versa L3 leg of the mains supply is connected to L3 terminal 5 and also used for the K L current taps terminals 7 and 8 D Set Up Log Sheet Application Description Motor Model Full Load Power akw AHP Current A M ains Voltage V Frequency 60 Hz 50 Hz Mains Phase 1 3 Phase 1 Phase Motor Efficiency 1 1 96 Unipower 9 Model HPL420 xxx 12220 10380 0415 0460 0575 S24 Current Transformer d None 1350 5 O Turns through CT dix O2x QO X Program Current Range A 1 3 45 8 Relay 1 CON INV QIINV Relay2 ON INV INV Start Time TS S Max Limit 96 kw Reaction T
14. its of kW and the X axis showing time At rest with mains power on the HPL420 unit is energized and the alarm relays activated as shown When the motor is turned on the load immediately surges due to the starting current inrush before settling to a steady value The HPL420 detects this surge and inhibits monitoring for a period Ts as shown Once Ts has completed limits hysteresis Tr etc become active This example shows power rising above the L1 Max Limit which triggers an alarm Relay 1 switches once the kW value has remained above L1 for the duration of the delay timer Tr1 This example denotes a control situation where the alarm is automatically reset once the kW value drops below the Hysteresis band For protection applications Hysteresis is typically not used and the alarm would be physically reset A continuation is shown where the motor load drops such that it falls below the L2 Min Limit which triggers a Relay 2 alarm once kW has remained below L2 for the duration of the delay timer Tr2 Again the HPL420 is reset using the automatic Hysteresis function but this can also be done physically Note also that the relay logic for the HPL420 can be programmed which is shown in the diagram as N Inv or Inv P n 100 P f t Auto Reset Max Hyst s Band 5 Max Limit 50 Min Limit 25 Auto Reset Min Hyst s Band reshold 5 Power On Relay 1 Closed N
15. mers 40 The optional HF3Axxx x series current 1 Hane transformers may be mounted either UI directly to standard 35mm DIN rail F as shown on Page 9 using accessory 60 a 741B0231 not included or screwed 27 directly to a panel using two M5 or 10 cap screws with accessory Figure 7 2 741B0230 6 not included as shown in Fig 7 2 Rail Mounting Kit UPR 14K50 Optional installation kit for the HPL420 55 comprises a section of 35mm DIN rail a set of terminal blocks for through e wiring of mains supply and a wiring harness to complete connection to HPL420 Rail space is provided for SE mounting both HPL420 unit and i HF3A current transformer Terminal is blocks accommodate 8 AWG 10mm2 Figure 7 3 max wires 50 Amp oJol Programming Mode Function EET v A Display Default kW Normal Mode M in Peak M ax Peak kW 96 Limit Max Limit 5 100 Decrease Increase Limit 80 Limit Min Limit 5 100 Decrease Increase Limit 20 TS S Start Delay 0 1 25 0 Sec Decrease Increase Ts Sec 2 0 Sec Tr S MaxAlarm Reaction 0 0 25 0 Sec Decrease Increase Tr Sec 0 1 Sec Tr S Min Alarm Reaction 0 0 25 0 Sec Decrease Increase Tr Sec 0 1 Sec Hyst s M ax Hysteresis 2 50 Decrease Increase Hyst s 1096 Hyst s Min Hysteresis 2 50 Decrease Increase Hyst
16. nd display 96 kW but no alarms will occur Phase Error Functions The phase order error functions are activated by DIP switch setting see Section 6 2 These alarms switch the Max Limit alarm relay in the same manner as an overload alarm but are immediately cancelled when the alarm condition is corrected During a phase error alarm the 4 20mA signal lout is set to OmA for possible remote alarm signaling Phase Order Phase order supervision generates an alarm when phase order is not L1 L2 L3 Phase order alarms are denoted by a flashing display of PH1 Phase Asymmetry A voltage deviation alarm is triggered when voltage deviates between phases by more than 8 A phase angle alarm is triggered when the angle between phases varies by more than 5 degrees Voltage deviation is denoted by flashing display PH2 and phase angle by PH3 Typical Applications The HPL420 is designed for applications where both over and under load supervision is required and differentiation between these conditions separate alarm relays is mandated e g for differentiated remote alarm enunciation or for control applications using both limits Combined with its integral Hysteresis function analog output and phase error alarm functions the HPL420 is a particularly versatile digital load monitor Centrifugal Pumps Have a power curve which is proportional to flow rate Power monitoring using the HPL420 therefore is very effective at e
17. nsuring the pump is running within the design minimum and maximum flow limits Particularly for dry running protection low power condition where ammeters are not effective Positive Displacement Pumps Flow rate is constant but excessive outlet restriction results in high pressure and high power The HPL420 provides a simple non intrusive monitoring function which can be effectively used to protect against dead heading and by pass flow Conveyors and Feeders Immediately detect a low power condition resulting from transmission chain or belt breakage and is far more sensitive to such low power conditions than a simple current sensor Immediately generate a max kW alarm when a feeder mechanism is jammed or overloaded in many cases can replace mechanical shear pins and is easier to set Other Aplications Many Other Applications exist including Fans Mixers Crushers Grinders etc o System Configuration The Unipower HPL420 measures voltage in all three legs of the 3 phase supply and current in one leg The HPL420 has an internal current transformer with a measurement range of 8 Amps In configuring the HPL420 for a particular application the voltage rating of the unit must match the mains supply being used and the effective current measured by the unit must be within its internal 8 Amp capacity 4 1 VOLTAGE MATCHING From Table 4 1 ensure that the rated voltage for the HPL420 unit matches the mains volt age be
18. of chatter instability To enable Hysteresis jumper S1 to Gnd as shown in Fig 5 1 Aut Reset To program Max Limit Hysteresis use the M ODE key to select Hyst s mode with M ax 1 flashing then use the A V keys to select the desired Hysteresis value To program Min Limit Hysteresis use the M ODE key to select Hyst s mode with M in 2 flashing then use the A V keys to select the desired Hysteresis value 8 11 CONVERTING KW TO ENGINEERING UNITS If it is necessary to set alarm limits in units of HP or kW or Torque please refer to your supplier or directly to WEN Technology for assistance All set up information on the Set Up Log Sheet see back cover will be required with the M ax and Min Limit values required given in the desired units Trouble Shooting Symptom Suggestion No Display HPL420 is not getting power check mains electrical connection Display stays at 000 HPL420 is not receiving a current signal check that full with motor running L3 current is flowing into Terminal 7 and back out of Terminal 8 or from Secondary Terminals S1 and S2 of current transformer if used Max Limit alarm trips First check that Max Limit setting is correct then check immediately when unit that the Ts Start Timer setting is sufficiently long Either is turned on increase L1 M ax Limit or TS Start Timer as appropriate Nuisance alarms during First check that alarm values are correct normal operation If nu
19. s 1096 Range Current Range 1 3 5 8 Amp 8 1 1 gt 8 MCU 5 Amp Relay 1 Relay 1 Polarity N Inv Invert N Inv Inv N Inv lt gt lnv Pol N Inverted Relay 2 Relay 2 Polarity N Inv Invert N Inv Inv N Inv lt gt Inv Pol N Inverted The HPL420 is programmed using only three keys MODE A V The MODE key is used to select the variable to be programmed and the values are adjusted using the A V keys The default state for the HPL420 on power up is kW 96 mode If any key is continuously depressed its action is repeated When no key has been depressed for about 5 seconds the mode reverts to kW 96 mode The HPL420 is programmed in the following sequence 8 1 CURRENT RANGE Depress the M ODE key to select Current Range A mode From Table 4 2 find the correct Current Range value for the unit as installed and enter this value using the A V keys 8 2 RELAY POLARITY Since the HPL420 has dual single pole single throw relays an option has been provided to program relay operation as either normally closed open on alarm or vise versa Depress the M ODE key to select Relay 1 and use the A V keys to select either N Inv or Inv function see Fig 5 2 for interpretation of function Repeat for Relay 2 8 3 CHOOSING LIMITS The HPL420 may be programmed while running and it is useful to observe normal conditions in order to set the remaining parameters Ts L1 Trl L2 and Tr2 To run the HPL420 b
20. starter being used to short S2 to Gnd when the motor is off This activates the S2 Inhibit function which inhibits alarm functions and prevents a Min Limit alarm on power down Soft Starts and Frequency Inverters When using the HPL420 with a soft start or a motor driven by a frequency inverter the HPL420 connections must be made directly in front of these devices L1 B L2 e L3 E Motor Fuses l HPL420 Fuses HPL420 E 1 NC 9 1 lu AC 9 cT 10 Aut Reset 19 Aut Reset Ext Reset Ext Reset 3 12 Nc 11 SMS 3 12 NC 11 c2 c2 12 12 ste rs i3 e ds G ls hs Cp s2 14 P s2 14 ES S1 37 x Gnd 15 HUS I k Gnd 15 m 8 out 16 4 8 out 16 s P2 52 K K eee ee FIFE M 3 Only if min limit use Only if min limit used In 8 Amp In 8 Amp Example internal converter Example external converter Figure 5 1 5 2 ALARM RELAY STATES The HPL420 has two single throw alarm relays which can be programmed as N Inv or Inv When programmed as N Inv the relays switch from open with power off to closed with power on When programmed as Inv the relays remain open with power on and switch to closed when
21. the A V keys to adjust 8 6 MIN LIMIT TRIP POINT Again using the Peak Detect function run the system at its minimum load condition and observe the min normal reading by depressing the V key Set the Min Limit value a few units lower than this value by depressing the M ODE key to select Min Limit 96 and then use the A V keys to adjust 8 7 REACTION TIMER SETTING The HPL420 has independent Reaction Timers for both the Max Limit alarm and Min Limit alarm which delay the alarm response when running outside the programmed limits Their purpose is to reduce false alarms due to normal process fluctuations Both Reaction Timers should be set to the lowest value which does not result in false tripping The default values of 0 1 sec will be good starting points for applications requiring rapid response e g blockage detection on conveyors For process applications such as pumps and mixing longer Tr values 1 to 2 sec will probably be more appropriate To set Reaction Time depress the MODE key to select Reaction Timer s and M ax Limit and then use the A V keys to adjust for Max Limit Reaction Time Depress the MODE key again to select Reaction Timer s and Min Limit and then use the A V keys to adjust for Min Limit Reaction Time 8 8 RESPONSE TEST A system response test should now be carried out to ensure that the HPL420 correctly stops the motor in the event of an alarm To do this run the system
Download Pdf Manuals
Related Search