Operating instructions Multiranger DS Series and Microranger DT
Contents
1. ZN MADE IN UK N KIA 9 D 1 9 9 1 9 9 3 9 9 4 0 23 DR CPC ECT EC EC pr 2 EM MN wA 7 3 7 3 7 3 7 374 3 MIA 934 a Uy 2 3 4 MSD LSD 1 10 10 10 10 SCALING FACTOR Kein SENSITIVITY DIVIDER om MAINS SELECT N I lt H WJ OME NEON 240 Yee C WC W VC VO YC VO NIC JK _ MO 220 Vac ES WI uw 50 60Hz 10Watts max 41 2 3 ToBEFUSED EXTERNALLY 4 5 6 7 8 9 10 IN Soy M __ __ 4 NC 412V Time Prox Ov L N 5V Pulse Mag Pu_ Reset DC Versions V OV Output Note voltage selector switch not fitted on DC versions Set up procedures Function select DIP switches see diagram on previous page for the location of these switches DIP SWITCHES FRONT sja2 s aj sje rzjesjeo to options mode resolution Select Tacho Rate Mult No decimal point 1 decimal point Cycle time 2 decimal points Magnetic Total 3 decimal points plus Auto ranging Remove display bezel amp filter to access switches Sensors and Signal inputs NPN PNP Proximity sensors Connect the sensor ve wire to 12v terminal 4 Ov wire to Ov terminal 10 sensor output to Proximity input terminal 8 Configure the unit to the appropriate sensor type using the front panel DIP switches 9 amp 10 as shown above Magnetic sensors Connect the sensor between Ov terminal 10 and Magnetic input terminal 9 Configure the unit to magnetic input2. XX X X x x x XXX CASE SIZE 48 48x96 96 96x96 72 72x72 BT Bench PT Portable SPECIAL SUPPLY 1 240 110 VAC 2 10 36VDC RS232 OUTPUT 3 24VAC 0 NONE 1 FITTED ANALOGUE OPTIONS 0 None TRIP OUTPUT 120 10 VDC 0 NONE 2 0 20 ma 1 1 Level 3 4 20 ma 2 2 Level 4 0 10 VDC input Note must be in 96 x96 CASE SEALS 0 None 1 IP55 Fitted DT Microranger Tachometers The Microranger series of DIN Digital tachometers are versatile instruments which can be used to measure rotational speed cycle time count and accumulated time With the addition of the Input divider sensor select module the measured speed may be scaled to display the rate in engineering units and a wider range of sensor types can be used Specifications DT48 specification Speed modes Speed range accuracy Resolution Display update time Cycle time Accumulated time Count mode Power supply options Sensor supply Enclosure size Scaling factors Division factor 0 001 to 99999 RPM 12 000 000 using input divider 0 02 of reading 1 digit 1 digit 0 001 RPM below 100R PM 0 8 secs or time between input pulses whichever is longer 0 01 sec to 99 999 secs 0 01 sec to 99 999 secs 5 digits with overflow to 8 digits autoranging 1 Mai
3. hence has no adverse effect on update time etc Input pulse divider This is the lower slide switch on the rear panel It enables the input pulse rate to be divided by 1 10 102 100 103 1 000 and 104 10 000 This can be used to measure pulse rates higher than the normal maximum input rate of 99 999rpm up to a maximum of 12Khz 5v square wave 1 1 mark space ratio It can also be used at slower speeds to average or smooth erratic readings If the divided input period is Greater than 0 8 seconds then the update time will become the input period thus enabling the update and hence the averaging effect to be increased NOTE when the reset options See above are enabled these refer to the pulse rate after the input divider Pulse Output A 5v TTL compatible output is available on terminal 7 This output is at the same rate as the incoming pulse rate no scaling is applied to it It can be used to drive addition instruments that require a 5v pulse input The maximum loading on this signal is 1KQ pull up to 5v or 100kQ pulldown to Ov Reset A reset capability is available via terminal 11 on the rear panel The unit can be reset momentarily connecting this terminal to Ov terminal 10 When the reset is connected to Ov the unit will stop and the display will continue to display the last reading When Ov is removed from the reset The Unit is only then reset internally with the measurement starting again from zero Process time Long process tim
4. update time Cycle time Count mode Accumulated time Scaling factor Power supply options Sensor supply Enclosure 0 001 to 99999 rpm 12Khz max using input divider 0 02 of reading 1 digit 1 digit 0 001 RPM below 100RPM 0 8secs or time between input pulses whichever is longer 0 1 secs if output module fitted 0 01sec to 99 999secs 5 digits with overflow to 8 digits autoranging 0 01 99999secs x or by 0 001 to 99 999 operates on all functions 1 Mains 110 240V AC 10 15 ext fuse ceramic 250mA A S 2 DC Version 10 to 36v DC 3 24v AC 12V DC 250ma and 5V DC 100ma DIN 48 x 96 x 140mm Panel cut out 42 5 x 91 5mm Factory adjustable parameters To Order Internal scaling factor Update time Under range speed Output module Specification 0 10v output Update time Output range Accuracy Full scale error Resolution Zero offset max Temperature Coefficient 0 20ma output Update time Output range Accuracy Resolution Zero offset max Max load Temperature Coefficient 4 20ma output Update time Output range Accuracy Resolution zero offset max Max load x or by 0 001 to 99 999 0 1 secs to 60secs 3RPM to 0 1RPM 0 1 secs or time between input pulses 0 9 99 Volts 0 15 of span 0 15 of span 2 5 mv 25 mV 30ppm C 0 1 secs or time between input pulses 0 20ma 0 3 of span 10 microamps 100 microamps 500 Ohms 100ppm C 0 1 secs or tim
5. 8 and Ov to Ov terminal 7 Configure the unit to magnetic input using the rear panel DIP switches 1 4 as shown above Encoders Connect the ve supply to 5v terminal 5 or 12v terminal 6 as required output signal to Sensor input terminal 8 and Ov to Ov terminal 7 Configure the unit to magnetic input using the rear panel DIP switches 1 4 as shown above AC signal sources 2 30v Peak Connect and configure as for magnetic sensors Sensitivity Control This is situated behind the front panel sets the level above which the input needs to reach in order for the signal to be recognised The noise rejection of the instrument also increases as this level is increased Input Scaling A scaling factor may be applied to the measured speed in two ways 1 The input signal may be divided by a 1 999 using the 3 rotary switches on the rear panel This may be used on all measurement modes NOTE as this divides the input signal before it is applied to the measurement system tthere could be a large increase in update time at slow input rates with large division factors 2 Multiplication factors x1 x10 x100 can be selected using the front DIP switches 4 amp 5 and can be used in conjunction with the rear division factor to give a range of scaling factors from x100 to 999 This is can only be used on rpm modes 3 Input pulse divider RPM where more than one pulse per revolution is being used via a sensor the input divider should be set to the numb
6. LO 3 DIVIDER 4 5 6 7 8 9 10 11 TO BE FUSED LEVEL I NIC COM N O 50 60Hz 10Watts max EXTERNALLY bv DC versions LEVEL 2 NIC COM N O eeeeeeee eee l Time 5V P Prox _ OV ulse Mag Pu Reset Preset level setting Procedure Enter the required value on the thumbwheel switches including any decimal places e g If the unit is required to trip at 231 32 RPM enter 23132 Select the number of decimal places required using the dip switches S4 SW1 amp 2 refer to level 1 setting SW485 refer to Level 2 settings Decimal Places DP1 DP2 None 0 0 One 1 0 Two 0 1 Three 1 1 E G for the value 321 32 set the switchs to CEP MODE UP DP1 m DP2 Note Always set the resolution of the thumbwheel setting to be the same as that of the Display The unit will still work if these do not match but there will be a loss of resolution Relay Mode S4 DIP switches SW1 SW4 These switches determine whether the output relay is energised or de energised when the display is above or below the set point Count mode If the display unit is set to Count mode then the unit will act as a predetermined counter The unit will trip as soon as the displayed count exceeds the selected value NOTE there is no provision for auto resetting the unit will continue counting after the set value has been reached Reset A reset capabi
7. e between input pulses 4 20ma 0 3 of span 10 microamps 100 microamps Ranges selectable on analogue output 0 999 0 9 99v 0 9990 0 9 99v 0 99900 0 9 99v O XXXXX 0 9 99v 2 500 Ohms 0 20ma 4 20ma 0 20ma 4 20ma 0 20ma 4 20ma ex works setting 0 20ma 4 20ma customer programmable Serial Output RS232 Update time Baud Rate Data Bits Stop bits Parity Output format End of line character Connection Analogue input module Full Scale input Accuracy Full scale error Nonlinearity Temperature Coefficient 0 1 secs or time between input pulses 9600 8 1 none Displayed value in Ascii characters MSD first including decimal point Carriage return 13 decimal OD hexadecimal RJ11 connector 9 99v 0 15 of span 0 15 of span 0 15 of span 100ppm Measuring range and Function select controls To access these remove the front bezel and display filter program push button NE Analogue range select O O jJ 12345678910 een DIP Switches Scaling Factor input divider and voltage selection facilities These are located on the rear panel of the instument
8. e of the instrument This output continually transmits as ASCII characters the value in the display The connections to RJ11 connector are pin 2 Transmitted data pin 5 Ovolts Only one of the voltage current types may be fitted at once the RS232 out may be fitted in conjunction with one of these or on its own Set up of analogue output module program push button 7 Analogue range select ed g ON O mfn ANALOGUE RANGE SELECTION FRONT VIEW z 12 RANGE EE o 9909 mL o 9990 EF 0 99900 mr customer program REAR VIEW 123 4567289 10 11 alele alele fed Relies Kes fed ANALOGUE OUTPUT Preset ranges Select the speed range to be measured 0 999 0 9990 0 99 900 using the analogue range selection switches found behind the front panel as shown in the above diagram Range DA1 DA2 DA3 0 999 0 9 99v 0 20ma 4 20ma 0 9990 0 9 99v 0 20ma 4 20ma 0 99900 0 9 99v 0 20ma 4 20ma ex works setting Customer program mode Apply power to the instrument Select customer program on the analogue range selection DIP switches Enter the maximum speed that the full scale analogue output will correspond to via the 5 rotary BCD switches on the back panel any decimal place required can be set using the upper slide switch see scaling fact
9. eceived It will also flash the display if the displayed value is greater than 99 999 or if displaying a fixed number of decimal places the value is larger than can be displayed with those number of decimal places Scaling factor This function can be applied to all measurement modes and is set using the 5 rotary BCD switches labelled scaling factor on the rear panel and the upper rear slide switch The scaling factor can be either a multiplication factor or a division factor To set the Scaling factor first determine whether the value should be divided or multiplied by the factor and set the Front DIP switch 5 accordingly Enter the scaling factor including any decimal places required into the 5 scaling factor switches If the factor contains decimal places then set the rear upper slide switch to the number of decimal places required Eg fora scaling factor of 24 86 set the switches as shown 9 0 4 9 9 1 9 9 1 9 9 1 9 0 4 0 1 2 3 DP 8 2 8 28 28 28 2 NHR OA dx M Oe Bret ua Og a MSD LSD SCALING FACTOR The scaling factor resolution and the display resolution are completely independent of each other however the measurement resolution can not be increased by the scaling factor e g if the unit is in count mode and the scaling factor is set to multiply by 43 the for each count input the display will increment in steps of 43 The scaling function is purely a mathematical calculation on the measured value and
10. er of pulses per revolution Microranger numbering system DT XX XXX CASE STYLE 48 48x96 PANEL MOUNTED SUPPLY 1 240 110 VAC 2 12VDC INPUT DIVIDER SENSOR SELECT OPTION 0 NONE 1 FITTED SPECIAL SEALS 0 NONE 1 IP55 FITTED 17 Compact Instruments Ltd February 2003 Document No 13989 4 3
11. es such as those of baking ovens can be measured and controlled with a fast update time by using the Time interval mode in conjunction with the scaling factor This can be achieved by monitoring the speed of the conveyors drive motor These pulses can be reduced in frequency by using the input divider until the measured value is of sufficient resolution The displayed value can then be scaled so that the display indicates the actual process time Using this method it is possible to measure process times of long durations Several minutes or even hours and yet have an update of only a few seconds Output Modules Analogue These are optional factory fitted modules that enable the measured value to be output in various preselected formats for further processing recording or to be used for control purposes The voltage and current outputs are available on rear terminal 6 The current voltage outputs have three fixed ranges and one customer programmable mode In the fixed ranges the maximum output voltage current corresponds to 999 in either the left hand three digits of the display the middle three digits or the right hand three digits In each case the other digits in the display have no effect on the output The output is updated at the same rate as the display and between updates the output remains constant If one of these is fitted then the Display update time is set at 0 1 seconds Serial The RS232 output is via a RJ11 connector situated on the sid
12. et value Equal to resolution of displayed value Output relays may be individually set to energise when the input speed is under or over the set speed Adjustable 1 9 Secs or customer defined via external contact closure Detects motion stopped within 3 seconds if activated Single or Dual 96 x96 x 136 mm Level 1 relay 12 Normally closed 13 Common 14 Normally open Level 2 relay 15 Normally closed 16 common 17 Normally open Time out 18 external control Inhibit 19 external control Common 20 common 0 volts for external control For information on configuring the measurement display portion of this unit refer to the DS48 instructions on page 1 Front controls Located behind front panel s1 nn nm me DP SELECT 54 DP1 DP2 SELECTED HFTCKXA 12NP o o NONE OL O UDDPN 1 o one LAN U7TT PPNP ala TWO DSTN o 1 1 THREE H T Lm LEVER O swi Comm MODE es oo 2 mm DPi 3 m DP2 4 Comm pp2 a a cc cm 5 Comp or 6 Comp MODE uer e S4 DELAY SECS co co co LEVEL 2 O MODE DISPLAY BELOW LEVEL SWA 1 6 0 RELAY DE ENERGISED Ue EXT CONTROL 1 RELAY ENERGISED a N 9 DE DE D 123 s Oe d 2 x3 DP Hn Br 2 as 2 s A 6 a e 1 e A FSB 1 10 10 10 10
13. lity is available via terminal 11 on the rear panel The unit can be reset by momentarily connecting this terminal to Ov terminal 8 When the reset is connected to Ov the unit will stop the display will continue to display the last reading and the relays will remain in the same state When Ov is removed from the reset The Unit is only then reset internally with the measurement starting again from zero Inhibit control This is normally used when the unit is being used to detect under speed It allows the unit being monitored to reach operating speed without triggering an under speed alarm Internal control this is set using the rotary switch S5 on the front panel This can be set to select start up inhibit times from 1 to 9 seconds in 1 second increments External control to activate this mode S5 must be set to zero The unit will then wait for a momentary contact closure across terminal 19 amp 20 Note unless external control is required do not set S5 to zero Time out motion stopped Normally the unit will not recognise that the input pulses have stopped until the Display drops to zero this in turn depends on the reset options chosen for the display unit with the normal 3 RPM limit this would be 20 seconds In order to rapidly detect that a machine has stopped e g in cases of mechanical failure the unit can be set to time out after 3 seconds by connecting Timeout terminal 18 to Common terminal 20 Multiranger numbering system DS
14. ns 110 240V AC 10 15 ext fuse ceramic 250mA A S 2 DC Version 12V DC 12V DC 50ma and 5V DC 100ma DIN 48 x 96 x 115mm 123mm including connectors Panel cut out 42 5 x 91 5mm x1 standard x10 x100 3 decade 1 999 only available when input divider sensor select option is fitted REAR VIEW SENSOR SELECTOR INPUT PULSE DIVIDER 12 3 4 MSD LSD gom ud Dm DS uum i all t 7 ollz ollz 3 mm um ALS EIL MAINS SELECT 240 1205 2 3 H 4 5 6 7 8 9 10 11 12 OOOQOQOOOQGQGQ Dee l NC 10V SIG OUT RESET L 12v N 5V 0V TIME ov Ov Rear panel Note sensor select switches and input pulse divider are only available when input divider sensor select option is fitted 13 Sensitivity control Input divider sensor sel je only no b EJ 12345675910 WTREERPTTTTETTTTTTT DIP Switches DIP switches located behind the front display filter Set up procedures Function select DIP switches see diagram above for the location of these switches DIP SWITCHES FRONT l2lslalslelr eleo m Measure Fixed Display Reset mode multiplier resolution options No decimal point rpm x 10 1 decimal point ycle time
15. or page 5 Press the program push button once the green LED next to the switch will flash The unit is now programmed Set the rear BCD switches to the scaling factor required if no scaling is required set to 00001 Note The accumulated time mode is not available on units fitted with an analogue output Input module This allows a voltage of 0 10v to be applied to the input of the unit which will then show a value of 0 9 999 on the display This value may then be scaled as required using the rear scaling factor switches Connect the Ov to terminal 10 and the positive input to terminal 6 Note The input divider switch must be set to divide by 10 position Speed trip module This versatile Set point alarm is available with one or two independently presettable levels which may be configured to trip on either under or over speed the relays may be set to either energised or de energised in either case An inhibit timer for start up on under speed applications is incorporated as is a motion stopped detector As well as speed measurements the unit will also work with all other measurement modes of the tachometer i e Count cycle time and accumulated time Specification Output Relay s Reponse Time Trip Resolution Trip Modes Start up inhibit delay Under speed time out No of channels Enclosure Terminations Single pole changeover 2A non inductive 240VAC or 30VDC Immediate when the displayed value changes to a value greater than the s
16. r 100kQ pulldown to Ov 15 Reset A reset capability is available via terminal 12 on the rear panel The unit can be reset by momentarily connecting this terminal to Ov terminal 11 When the reset is connected to Ov the unit will stop and the display will continue to display the last reading When Ov is removed from the reset the Unit will then reset internally with the measurement starting again from zero Input Divider Sensor Select options If this option is fitted the following extra features are available Sensor selection SENSOR NPN PROXIMITY SWITCHES co oO EF Factory Default setting ooo oo oo ENCODER cc CO Co MAGNETIC O c3 oo 2 WIRE NAMUR oes feces PNP PROXIMITY OPTICAL NPN PNP Proximity sensors Connect the sensor ve wire to 10v terminal 6 Ov wire to Ov terminal 7 sensor output to signal input terminal 8 Configure the unit to the appropriate sensor type using the rear panel DIP switches 1 4 as shown above Magnetic sensors Connect the sensor between Ov terminal 7 and Signal input terminal 8 Configure the unit to magnetic input using the rear panel DIP switches 1 4 as shown above Namur 2 wire sensors Connect the sensor Ov wire to Ov terminal 7 and the signal wire to signal input terminal 8 Configure the unit to NPN input using the rear panel DIP switches 1 4 as shown above Pulse inputs 2 30v DC Connect the ve to magnetic input terminal
17. rpm x 100 2 decimal points Total 3 decimal points plus Auto ranging FEE ENES Sensors and Signal inputs NPN Proximity sensors Connect the sensor ve wire to 10v terminal 6 Ov wire to Ov terminal 7 sensor output to Signal input terminal 8 Namur 2 wire sensors Connect the sensor Ov wire to Ov terminal 7 and the signal wire to Signal input terminal 8 Measurement mode selection RPM Set the front panel DIP switches 1 amp 2 to Tacho rate the unit will then display the speed of the input pulses in RPM Count Set the front panel DIP switches 1 amp 2 to Count and set the Display resolution to Autoranging see Display resolution below The unit will now display a running total of the input pulses received since the power was applied or since the last reset When the count value exceeds 99 999 counts the unit will auto range and count in 10 s The decimal point will move to indicate the position of the thousands i e it can be read as the comma that separates thousands from the hundreds in a normal written number e g 345 19 a count of 345 190 If the count again exceeds 999 99 it will again auto range and count in 100 s The maximum count is 99 999 999 Accumulated time If during a count session time rear terminal 9 is connected to Ov terminal 11 the unit will display the time elapsed since the count began On removing this connection the count will again be displayed Cycle Time Set the front DIP swi
18. s shown in the above diagram This feature is normally used in conjunction with the input divider option see below Reset options The two DIP switches 9 amp 10 determine the operation of the unit in under range and over range conditions the alternatives are Reset to zero if no pulses have been received for 20 seconds i e if the input speed is less than 3 rpm DIP switch 9 should be set to on If this is set then it overrides the action of DIP switch 10 over range enable Continue to measure below 3 RPM DIP switches 9 amp 10 off In this case the unit will continue to measure speeds down to 0 001 rpm Note in this mode if the apparatus being measured stops then the unit will never go to zero but will continue to display the last reading Flash Display on under over range conditions DIP switch 10 on In this case the display will flash when an input pulse has not be received for 20 seconds and the display holds the last reading until another pulse is received It will also flash the display if the displayed value is greater than 99 999 or if displaying a fixed number of decimal places the value is larger than can be displayed with those number of decimal places Pulse Output A 5v TTL compatible output is available on terminal 10 This output is at the same rate as the incoming pulse rate no scaling is applied to it It can be used to drive addition instruments that require a 5v pulse input The maximum loading on this signal is 1KQ pull up to 5v o
19. tches 1 amp 2 to Cycle time and the display resolution to Auto ranging The unit will now display the time between successive input pulses to a maximum resolution of 0 01 seconds If the time exceeds 99 990 Secs the unit will auto range and continue to display the time up to 999 99 secs It will again autorange and display time up to 9999 9 secs but to a resolution of 0 1 seconds At times greater than 9 999 9 seconds the unit will again auto range enabling a maximum count value of 99 999 seconds to a resolution of 1 second Display resolution rpm modes only The resolution of the display can be set to either a fixed resolution of 0 1 2 or 3 decimal places or to be fully autoranging in which case the maximum number of decimal places possible at the current speed will be displayed To select auto range mode set DIP switch 6 to on in this case switches 7 amp 8 will have no effect To select a fixed number of decimal places set DIP switch 6 to off and select the number of decimal places required as per the above diagram Note that when in fixed resolution mode if a resolution is chosen that is too great to fit the whole value in the 5 digit display the higher digits will be lost but the overall measurement resolution is not changed so the least significant digits will not be displayed to the full accuracy of the unit Scaling Three fixed ratios can be applied to the measured value x1 x10 x100 rom modes only these are selected using DIP switches 4 amp 5 a
20. unit will auto range and count in 10 s The decimal point will move to indicate the position of the thousands i e it can be read as the comma that separates thousands from the hundreds e g 264 12 a count of 264 120 If the count again exceeds 999 99 it will again auto range and count in 100 s The maximum count is 99 999 999 Accumulated time Count duration If during a count session time rear terminal 6 is connected to Ov terminal 10 the unit will display the time elapsed since the count began On removing this connection the count will again be displayed Cycle Time Time interval Set the front DIP switches 3 amp 4 to Cycle time and the display resolution to Auto ranging The unit will now display the time between successive input pulses to a maximum resolution of 0 01 seconds If the time exceeds 99 990 Secs the unit will auto range and continue to display the time up to 999 99 secs It will again autorange and display time up to 9999 9 secs but to a resolution of 0 1 seconds At times greater than 9 999 9 seconds the unit will again auto range enabling a maximum count value of 99 999 seconds to a resolution of 1 second When used in conjunction with the scaling factor this mode can be used to display long process times but with a fast update see Process time page 6 Display resolution rpm modes only The resolution of the display can be set to either a fixed resolution of 0 1 2 or 3 decimal places or to be fully autoranging in
21. using the front panel DIP switches 9 amp 10 as shown above Namur 2 wire sensors Connect the sensor Ov wire to Ov terminal 10 and the signal wire to proximity input terminal 8 Configure the unit to NPN input using the front panel DIP switches 9 amp 10 as shown above Pulse inputs 2 30v DC Connect the ve to magnetic input terminal 9 and Ov to Ov terminal 10 Configure the unit to magnetic input using the front panel DIP switches 9 amp 10 as shown above Encoders Connect the ve supply to 5v terminal 5 or 12v terminal 4 as required output signal to magnetic input terminal 9 and Ov to Ov terminal 10 Configure the unit to magnetic input using the front panel DIP switches 9 amp 10 as shown above AC signal sources 2 30v Peak Connect and configure as for magnetic sensors Sensitivity Control This sets the level above which the input needs to reach in order for the signal to be recognised The noise rejection of the instrument also increases as this level is increased Measurement mode selection RPM Set the front panel DIP switches 3 amp 4 to Tacho rate the unit will then display the speed of the input pulses in RPM Count Set the front panel DIP switches 3 amp 4 to Count and set the Display resolution to Autoranging see Display resolution below The unit will now display a running total of the input pulses received since the power was applied or since the last reset When the count value exceeds 99 999 counts the
22. v compact INSTRUMENTS Operating instructions Multiranger DS Series and Microranger DT Series Panel mounted Tachometers ratemeters counters timers Phone 44 0 1204 532544 Fax 44 0 1204 522285 www compactinstruments co uk email sales compactinstruments co uk Contents Multiranger Tachometers DS48 specification Factory adjustable parameters Output module Specification 0 10v output 0 20ma output 4 20ma output Serial Output RS232 Analogue input module Measuring range and Function select controls amp set up Sensors and Signal inputs Sensitivity Control Measurement mode selection Reset options Display resolution Scaling factor setting Input pulse divider Pulse Output Reset Process time Output Modules Analogue output Serial output Analogue ouput setup Input module Speed trip module Specification Terminations Front controls Rear panel Preset level setting Procedure Relay Mode Count mode Reset Inhibit control Time out motion stopped Multiranger numbering system Microranger Tachometers DT48 specification Set up procedures Sensors and Signal inputs Measurement mode selection Reset options Pulse Output Reset Input Divider Sensor Select options Microranger numbering system WWNNNNNND o 0000101C1 A BROW 0 0 0 OD N DS Multiranger Tachometers Specifications DS48 specification Speed modes Speed range Accuracy Resolution Display
23. which case the maximum number of decimal places possible at the current speed will be displayed To select auto range mode set DIP switch 6 to on in this case switches 7 amp 8 will have no effect To select a fixed number of decimal places set DIP switch 6 to off and select the number of decimal places required as per the above diagram Note that when in fixed resolution mode if a resolution is chosen that is too great to fit the whole value in the 5 digit display the higher digits will be lost but the overall measurement resolution is not changed so the least significant digits will not be displayed to the full accuracy of the unit Reset options These two DIP switches determine the operation of the unit in under range and over range conditions the alternatives are 1 Reset to zero if no pulses have been received for 20 seconds i e if the input speed is less than 3 rpm DIP switch 1 should be set to on If this is set then it overrides the action of DIP switch 2 2 Continue to measure below 3 RPM DIP switches 1 amp 2 off In this case the unit will continue to measure speeds down to 0 001rpm Note in this mode if the apparatus being measured stops then the unit will never go to zero but will continue to display the last reading 3 Flash Display on under over range conditions DIP switch 2 on In this case the display will flash when an input pulse has not be received for 20 seconds and the display holds the last reading until another pulse is r
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