7006 Loop–Mate 1
Contents
1. 7006 Loop Mate 1 Loop Voltage Current Simulator User Manual 205 Westwood Ave Long Branch NJ 07740 1 877 742 TEST 8378 equipment Fax 732 222 7088 salesteam Tequipment NET Contents Page 1 Introduction 1 1 General description 2 1 2 Specification 3 4 1 3 Front Panel Controls 5 2 Loop Mate1 Operation 2 1 Function Select 6 2 11 Description of typical process loop components 6 7 2 2 Rx Test 4 20mA output 8 2 3 TxSim 4 20mA Current Sink 9 2 4 0 10vSim 10 3 Additional Features 3 1 Auto Step 11 3 2 Audio Beeping 11 3 3 Automatic Power Down 11 4 Loop Error Indication 4 1 Error Display on the Loop Mate1 12 5 Power Supply 5 1 Battery Life 13 5 2 Battery Replacement 13 6 Maintenance 6 1 Checking Calibration 14 15 6 2 Adjustment of Calibration 16 6 21 Disassembling Loop Mate1 16 6 22 Trimmer Locations 17 6 23 Current calibration 17 6 24 Voltage calibration 17 6 25 Re assembly 18 7 Guarantee amp Servicing 19 All Time Electronics instruments are subject to continuous development and improvement and in consequence may incorporate minor detail changes from the information contained herein 1 1 Introduction 1 1 General Description The Loop Mate1 provides both 4 20 mA and 0 10V process loop compatible signals It simulates a transmitter and allows testing and calibration of process signal indicators and controllers To assist the operator it emits an audible beep for every change in output This2. LED s UP DOWN buttons function select switch auto step select button Automatic Up Down step through the set points Selectable 0 5 1 2 4 or 8 steps per second At top 100 and bottom 0 twice the step time A beep is sounded with increasing frequency for each step This feature can be disabled if required Faulty loop conditions TxSim Loop open circuit or loop resistance too high RxTest Inadequate loop excitation supply 10vSim Loop short or loop resistance too low Two 4mm recessed sockets PP3 battery Auto power down feature can be disabled if required Leatherette material Includes compartment for leads and spare battery 4mm gold plated connectors with crocodile clips Temperature co efficient Operating temp Storage temp Operating humid Dimensions weight The unit stays in specification over operating temperature range 5 to 50 degC 30 to 70 degC 10 90 non cond 25degC 14 x 6 6 x 2 7cm 6 x 2 5 x 1in 280gm 100z 1 3 Front Panel Controls 1 Output Terminals Recessed 2 Function Switch 3 Auto Step Button 4 Up Down Control Buttons 5 Power Error LED 6 Output LED Indicators 2 Loop Mate1 Operation 2 1 Function Select The Loop Mate1 has 3 functions Function 1 Rx TEST 4 20mA Function 2 TX SIM 4 20mA Function 3 0 10v dc SIM These are selected using the function select switch Function 2 acts as a current sink only when an external loo
3. polarity e Turnon the unit by pressing the Down arrow button Set the required set point by pressing the Arrow keys The indicator LED will show which set point is selected Loop excitation supply 5 50v allowable Rx under test Rx indicator under test i JI TxSim Loop excitation supply TxSim connection Note The total loop resistance including connections should not exceed 6000 2 4 10vSim 0 10v function The unit outputs voltage in the range of 0 to 10V There are seven set points The selected set point is indicated on the front panel in both percentage of span and actual volts The UP DOWN buttons can be used to change the set point The set points are Percentage of Voltage output Span Operation e Set function switch to 10vSim 0 10v e Connect the unit to the process indicator or controller observing correct polarity e Turnon the unit by pressing the Down arrow button e Select the required set point by pressing the Arrow keys The LED indicator will show which set point is selected 0 10v signal Rx Indicator O 10v ee _ _ _ JJ Loop Mate1 10vSim Voltage loop RxTest connection 10 3 Additional Features 3 1 Auto Step The Loop Mate has the ability to automatically step through the set points both up and down This feature is available for any of the 3 functions RxTest TxSim 10vSim Auto Step is enabled by pressing
4. the Auto Step button To disable it press the button again The length of time the output stays on each level can be altered by pressing the UP or DOWN arrow buttons The UP shortens the period and the DOWN button increases the period The different periods are 0 5 1 2 4 or 8 seconds When the output reaches the 100 or 0 levels it will dwell stay for twice the step period before continuing in the opposite direction The unit will continue indefinitely in Auto Step mode until the Auto Step button is pressed or the unit is turned off 100 PA A fe awa si e 0 0 Diagram of Auto Step feature t step period In Auto Step mode the indicator LED s blink at four times the step rate The stepping direction can be reversed at any time by pressing the Auto Step button twice Audio beeps if enabled occur on each step change 3 2 Audio Beeping The audio beep feature can be toggled on or off by pressing the UP DOWN arrow keys simultaneously when powering on the unit This will power up the unit and change the beep setting Switching on the unit normally will not change the beep setting 3 3 Automatic power down Auto power down is the default setting The auto power down feature is incorporated to prevent Loop Mate1 being inadvertently left switched on after use and draining the battery The unit will automatically power down if no button is pressed for 15 minutes Auto power down does not operate when using th
5. the DMM to measure 20MA dc Turn on the Loop Mate 1 Press the UP arrow until 20mA output is selected Adjust P2 until the DMM display reads exactly 20 000mA if the full scale of the DMM being used is 19 999mA then use set point 18 4mA and adjust P2 until the DMM reads 18 400mA Then re check all the other set points 10vSim Voltage calibration Connect the DMM to the output terminals of the Loop Mate1 Set the function switch to 0 10v dc Sim Select the most suitable range on the DMM to measure 10v dc Turn on the Loop Mate1 Press the UP arrow until 10v output is selected Adjust P1 until the DMM display reads 10 000v 17 6 25 Re assembly e Disconnect the battery after re calibration e Refit the lid Care must be taken to ensure that the ribbon cable linking the two PCB s is folded in such a way it won t get trapped when the lid is screwed into place Replace the lid and screw the four case screws into place e Replace the battery and battery compartment cover See section 5 11 18 7 Guarantee amp Servicing Guarantee Period The Loop Mate1 is guaranteed against defects in materials and workmanship for a period of one year from its delivery to the customer During this period we will subject to the instrument not being damaged due to maltreatment or overload repair or replace it free of charge apart from shipping costs For repair under guarantee the instrument serial number must always be quoted t
6. e auto step mode The auto power down feature can be disabled when powering up the unit if required Instead of momentarily pressing the DOWN arrow button hold it down until the 0 LED comes on approx 2 seconds 11 4 Loop Error Indication 4 1 Error display on the Loop Mate1 Loop Error LED With the RxTest function selected If the loop is open circuit or resistance too high the error LED will start flashing However short circuit on the loop is not indicated With the TxSim function selected If the external loop excitation supply voltage is too low the polarity is not correct or the loop open circuit or resistance too high the error LED will start flashing However short circuit on the loop is not indicated With the 10vSim function selected If the loop is short circuit or resistance too low the error LED and the output LED will both flash There is also a warning bleep emitted with every flash of the LED s This error is caused when Loop Mate1 s current drive capability 20mA is exceeded 12 5 Power supply 5 1 Battery life The unit is powered by a single PP3 battery Types that can be used are Zinc Carbon 250mAh Alkaline 450mAh Lithium 1200mAh and rechargeable 150mAh For best performance Lithium batteries are recommended Under typical usage an Alkaline 450mA battery will last for approximately 15 20 hours of continuous operation Assuming the Loop Mate1 is used for approximately 3 hours per da
7. h NJ 07740 T Fax 732 222 7088 a salesteam Tequipment NET equipment 1 877 742 TEST 8378
8. increases in frequency as the signal level increases For hands free operation the Auto Step mode can be selected and this automatically steps the signal through the span The operator can then leave the Loop Mate1 connected while moving to another location to check the signal is arriving correctly In addition to TxSim transmitter simulation and 10vSim Loop Mate1 can also provide the loop drive supply that allows an RxTest function indicator controller test without the need for the external excitation power supply The Loop Mate1 is powered by the universally available PP3 battery An Auto power down feature which can be disabled ensures fewer battery changes Re chargeable batteries can be used if required Loop Mate1 is a service and maintenance engineer s best friend It combines low cost and simple operation while providing more than enough accuracy for most applications It comes complete with carrying pouch leads clips and user manual Loop mate 1 plus accessories 1 2 Specification Functions Ranges Set Points Accuracy Indication Control Auto Step Step Rates Dwell Time Beeping Error Indicator Connections Power Carrying Pouch Leads RxTest TxSim 10vSim 4 20mA 0 10v dc Max current 20mA 7 Points 0 4mA or Ov 10 5 6mA or 1v 25 8mA or 2 5v 50 12mA or 5v 75 16mA or 7 5v 90 18 4mA or 9v 100 20mA or 10v 0 1 of span High brightness
9. lowed error specification a I aoe GIN 14 Checking Calibration Voltage Connect the DMM to the output terminals of the Loop Mate1 Set the function switch to 0 10v dc Select the most suitable range on the DMM to measure 10v dc Turn on the Loop Mate1 For each set point check if the reading is within specification If a set point is out of specification then adjustment of the calibration is needed see later in this section Allowed error specification Set point V Min value V Max value V 2 o o i ee ee ee i 249 i 25 15 6 2 Adjustment of Calibration When Loop mate1 is found to be out of specification the procedures described in the following sections must be followed 6 21 Disassembling Loop Mate1 e First remove the battery compartment cover and disconnect the battery as shown in section 5 11 of this manual Remove the 4 screws from the back of the case e Position the Loop Matet so that the front panel is facing upwards Carefully lift the case lid and turn it towards the right take care not to stress the ribbon cable Next reconnect the battery 16 6 22 Pt 6 23 6 24 Trimmer Locations used for adjusting the calibration P2 a 4 Oy 20 O Vo O Oo o O LO O Cn RxTest Current source calibration Connect the DMM to the output terminals of the Loop Mate1 Set the function switch to Rx Test Select the most suitable range on
10. n both percentage of the span and actual mA An illuminated LED indicates which point is selected The UP DOWN buttons can be used to change the set point The set points are Operation e Setthe function switch to RxTest Connect the unit to the process indicator or controller Rx observing correct polarity e Turnontheunit by pressing the Down arrow button Set the required set point by repeatedly pressing the Arrow keys The indicator LED will show which set point is selected i 4Ve Rx Indicator i under test ee Rx indicator I Ve gt lt under test Loop Matet Rx Test function RxTest Connection Note The total loop resistance of the Rx indicator plus lead connector should not exceed 6000 2 3 TxSim function 4 20mA_ Current Sink Using the TxSim function the unit takes its excitation power from the loop and acts as a current sink The excitation supply voltage must be in the range 5 to 50 volts dc Warning Do not attach the excitation supply to the terminals of the Loop Mate1 when TxSim is not selected The user can set the loop current to one of seven set points They are indicated on the front panel in both percentage of span and actual mA The Up Down buttons can be used to change the set point The set points are Operation Set the function switch to TxSim e Connect the unit to the loop excitation supply and process indicator or controller Rx observing correct
11. ogether with details of the fault The purchaser of the instrument must prepay all shipping charges This guarantee is void if servicing or repair has been attempted by an unauthorized person or agent Service and Calibration Routine servicing and recalibration of your instrument is an essential part in the life of any calibration instrument This will ensure that your instrument is performing to its specifications All repairs are made using high grade and often specialised components to ensure on going accuracy and performance Our quality control 1509001 ensures the work is undertaken to the highest standards When an instrument is returned for repair any product enhancements updates hardware and software will be done automatically Returning Instruments It is preferable to contact Time Electronics or their authorized agent to discuss any special paperwork customer declarations etc and shipping requirements Always include information about the service required and your company details including a contact name address phone number and email address Remember to include the name of the person you spoke to about the return When returning instruments please ensure that they have been adequately packed preferably in the original packing supplied We will not accept responsibility for units returned damaged Time Electronics Ltd Unit 11 Botany Industrial Estate Tonbridge Kent TN9 1RH 2 USA 205 Westwood Ave C Long Branc
12. p excitation supply is connected 2 11 Description of typical process loop components Loop sitio Rx Indicator Rx Indicator supply 4 20mA 0 10v Tx Transmitter Tx Transmitter 4 20mA 0 10v 4 20mA process loop 0 10v process loop Loop pun pn n i nn Gin n t pl q excitation supply ae micao Tx Pi ator ctuator supply 4 20MA i vemen DR 4 20MA Ta tter Process Controller Lami bas aS EARS ZO AOI 4 20mA Process loop and 4 20mA Control loo Can be used for closed loop control Tx transmitter This component converts physical signals such as pressure temperature flow and level etc into the loop signals 4 20mA or 0 10v Rx receiver This component measures the loop signal and either displays it indicator or converts it to another form e g digital output for control purposes controller Process Controllers This device usually contains both Rx signal loop and Tx control loop components which operate in separate loops The Rx and Tx can be either 4 20mA or 0 10v Loop excitation supply A DC power supply nominally 24v that drives the loop 205 Westwood Ave _ Long Branch NJ 07740 nf 1 877 742 TEST 8378 equipment Fax 732 222 7088 salesteam Tequipment NET 2 2 RxTest function 4 20mA The unit can provide current output from 4 20mA with an internally generated loop excitation drive capability There are seven output set points over the span They are indicated on the front panel i
13. y the batteries will last for a week or more Continuous operation on the RxTest function will shorten the battery life The unit will automatically power down when the battery voltage is too low The performance of the unit will remain within specification until power down occurs Replacement of the battery is then necessary It is recommended that a spare battery be always carried in the compartment provided in the carrying pouch 5 11 Battery replacement Slide off the back cover of the case and remove the battery from its compartment Unclip the battery and replace it with a new PP3 as shown below Then slide the battery cover back into place The pictures above show the removal of the battery The reverse procedure should be used to replace the battery 13 6 Maintenance 6 1 Checking Calibration Calibration equipment required DMM with accuracy of 0 02 or better Examples of suitable instruments are Time Electronics 5075 or HP 34401A Calibration should be done at 20 C 10 deg C Checking Calibration RxTest Current source Connect the DMM to the output terminals of the Loop Mate1 Set the function switch to RxTest Select the most suitable range on the DMM to measure 20MA dc Turn on the Loop Mate1 For each set point check that the output is within specification see table below If a set point is out of specification then adjustment of the calibration will be required see later in this section Al
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