Ezecal Model 6 User Manual - FGH Controls Limited Homepage
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1. FGH Controls Ltd Openshaw Way Letchworth Herts SG6 3ER Tel 44 0 1462 686677 Fax 44 0 1462 671860 www fghcontrols com Ezecal Model 6 E HD Ga Gow GG a is Ha ke b ecaa User Manual Ezecal Model 6 User Manual 1 Contents A gt AERO CICERO EE 2 1 1 BUFO ACI ereechen tect boat te cea cee cA eta veces tah eebe 2 E el FAT aE E E E E E E E EEE EEE E ET 3 nt Ce EE EE 3 2 1 1 HE Eegeregie eeh dees 3 2 2 Turning the unit on and OM ees ee eee Seated nse et a cada eee tee tae dy nna 3 2 3 Entering NUMberSs etek eege 4 24 EE 4 2 4 1 Thermocouple measurement ue 4 2 4 2 Voltage E EE 5 2 4 3 C reni TITAS M Ei ee 5 2 4 4 Thermocouple Simulation ceccecesceeeceseeeeeseseeeseeeseeeceeeseeeceaesesaeeaeeeseeseeeseetseeeseaees 6 2 4 5 Voltage and current Ile 7 25 e le Kei EE 7 2 5 1 Bn GEET 7 2 5 2 Eine ne 8 2 5 3 Saving and recalling frequently used values EEN 8 2 5 4 Timed recall of saved values ue 9 263 e el Vell SUING EE 10 2 6 1 A to power E 10 2 6 2 Ge e leed ln e EE 10 2 6 3 Recall MOIE 10 K SE Calipraton d EE 11 3 1 Creating a new calibration fie eeeceeesceseeceeseeeeeeeceseeeeeeeseeeceaeseeaceaneesseeaneeeseeeeeseataes 11 3 2 Opening a calibration nie 13 3 3 Calibration mode dISplay tiv tected eee ou eee ice eee ura aa Nas ieee ueeaes 13 3 3 1 Adding a new calibration e cnn edo ee lacie ete 13 3 3 2 Recording the pre calibration reSult eeeesecesceseeceeseseeeeeeeseeeceeese2. From the main menu Press 4 to advance to the Cal Records menu Press 4 to view a calibration record file The display will now show the list of files currently available Files that are complete are marked with a tick Use the up and down arrow keys to indicate the file to be viewed and press enter to select The selected file is then displayed on the first page the file name tag name and calibration mode are shown Press the Scroll key to advance to the actual calibration values Each calibration point is shown in order Use the up and down arrow keys to move through the list as required For each calibration point three values are shown Cal point The simulate value used for this point The adjacent symbol indicates whether this point is a check point or a cal adjust point GC Pre cal The reading given by the unit being calibrated before calibration If this value has an adjacent tick mark Le then this reading has been done Post cal The reading given after calibration If this value has an adjacent tick mark Lei then this reading has been done Press the Scroll key to return to the previous menu 4 Communications The Ezecal 6 is fitted with an RS232 serial interface as standard and may be used for remote control or downloading of new ranges The RS232 port operates at a fixed rate of 57600 Baud 8 bits per character one start and one stop bit with no parity 4 1 Communications connection The su
3. 1 Battery pack The Ezecal is equipped with an interchangeable rechargeable NiMH battery pack providing up to 20 hours of continuous use When the Ezecal detects that the battery is low on power the battery condition indicator will flash and the unit will start to beep After a short time the unit will switch itself off At this point the battery pack should be recharged To remove the battery pack simply press down the release tab and slide the pack backwards for approximately 10mm When the battery pack is disconnected from the unit take care not to short out the power contacts Plug the battery pack into the fast charger unit this will take up to 4 hours to fully charge the battery To refit the pack simply follow the reverse procedure Warning Removal of the battery pack while the unit is switched on may result in some memory loss Always ensure that the unit is switched off before changing the battery pack M56 Issue 1 0 Ezecal Model 6 User Manual 3 2 Operation 2 1 The keypad The keypad consists of 16 tactile keypads plus an On button The keypad legends in black show the purpose of the key when used Di 2 E C in isolation ES ES da The red legends are the shift functions To use a shift function hold down the shift key first and then press the required key For example to activate the Help function hold down the Shift key r and then press the 7 key Every time a key is pressed the displa
4. Minimum temp _Maximum temp Thermocouple Type S EN60584 1 1768 C Thermocouple Type R EN60584 1 1768 C Thermocouple Type J EN60584 1 210 C 1200 C Thermocouple Type K EN60584 1 270 C 1372 C M56 Issue 1 0 20 Ezecal Model 6 User Manual Thermocouple Type T EN60584 1 270 C 400 C Thermocouple Type E EN60584 1 270 C 1000 C Thermocouple Type B EN60584 1 1820 C Thermocouple Type N EN60584 1 270 C 1300 C 5 3 Standard Thermocouple Ranges US Version Range Standard IT Minimum temp _ Maximum temp __ 5 4 Measurement and simulation accuracy thermocouple ranges The basic accuracy of the 100mV range affects the accuracy of the thermocouple ranges by an amount that varies with type and temperature To this must be added conformity uncertainties which vary with type and temperature To the sum of these is then added the internal CJ accuracy which itself varies with type and temperature The following graphs show the absolute max total uncertainties for each of the standard thermocouple ranges Thermocouple Types S and R Max Total 2 Uncertainty e 2200 0 200 400 600 800 1000 1200 1400 1600 1800 C Thermocouple Type J Max Total Uncertainty C 200 0 200 400 600 9800 1000 1200 1400 1600 18007 Thermocouple Type K Max Total 2 Uncertainty C 2500 0 200 400 600 800 1000 1200 1400 1600 1800 C M56 Issue 1 0 Ezecal Model 6 User Manual 21 3 Thermocouple T
5. for any reason the Ezecal cannot process the received message an error message will be returned The error message is of the form Error NNNN lt CR gt Where the error code NNNN has the following meanings The specified command does exist An illegal index number was received Unterminated message The command mnemonic does not exist Illegal value received Command mnemonic is read only L ch 0 PM ch N O M56 Issue 1 0 Ezecal Model 6 User Manual 19 5 Specifications 5 1 Standard Linear ranges Range 100mV Input 10V Input ____ Range 1 000Vt0 10 000V_ 100mV Output Range IL 10mV to 105 00mV_ 10V Output Range 1 000V to 10 500V_ 20mA Output Range TL 2 000MA to 21 000MA_ Notes T The accuracy is specified for 90 days after not less than 30 minutes operation under the following reference conditions Ambient temperature 20 2 C Ambient humidity 60 10 Power Internal fully charged batteries trickle charger not connected Backlight Off Input source resistance lt 100R Output load resistance 100R 20mA range or gt 10000R mV and V ranges t The temperature coefficient is specified under the following conditions Ambient temperature 10 to 50 C 5 C per hour Ambient humidity 0 to 95 no condensation Source resistance 0 to 1000R Load resistance 0 to 500R 20mA range or gt 1000R mV and V ranges 5 2 Standard Thermocouple Ranges European Version Standard
6. mean carriage return ASCII code 13d lt LF gt is the line feed character ASCII code 10d Read messages Message SV lt CR gt Read the current simulate value Response SV 1200 0 lt CR gt lt LF gt Current simulate value is 1200 Message VM 2 lt CR gt Read the current value of memory 2 Response VM 2 2000 lt CR gt lt LF gt Memory 2 contains 2000 Write messages Message SV 100 lt CR gt Set the current simulate value to 100 Response SV 100 0 lt CR gt lt LF gt Unit confirms simulate value is 100 Message VM 2 500 lt CR gt Set the current value of memory 2 to 500 Response VM 2 500 lt CR gt lt LF gt Unit confirms Memory 2 contains 500 4 2 3 Numeric data Numeric data is sent to and from the Ezecal in engineering units M56 Issue 1 0 18 Ezecal Model 6 User Manual All of the following examples are valid ways of representing the number 5 5 5 0 5 05 5 05 0 5 000 any of these forms will be accepted by the unit assuming that 5 is a valid setting for the parameter being accessed In certain circumstances the unit will truncate the number received if it exceeds the resolution of the parameter being written For example on the 100mV simulation range a received value of 5 001 will be truncated to 5 00 In all cases the response from the calibrator will confirm the exact value used 4 2 4 Coded data Certain command mnemonics return coded data Code meanings for SU and MU milliVolts 4 2 5 Error messages If
7. other characters required Enter this in the same way as the file name Press Shift and to select the next field for entry M56 Issue 1 0 12 Ezecal Model 6 User Manual Select the calibration mode required using the Up and Down keys Simulate Only In this mode the Ezecal is used to provide the calibration source only For example when calibrating a temperature indicator the user needs only to provide an input to the indicator the value indicated is recorded by the user Since the performance of the unit under calibration is manually entered the range resolution and units may entered as required Simulate Measure In this mode the Ezecal both provides the calibration source and measures the results For example when calibrating a temperature transducer the user needs to provide the input to the transducer and measure the output from the transducer Press the Scroll key to advance to the setup for the simulation output Select the required range for the simulation output using the up and down arrow keys Press Shift and to select the next field for entry Select the required units of measure for the simulation output using the up and down arrow keys Note Not all ranges have selectable units Press the Scroll key to advance to the setup for the measurement input Simulate only mode If the calibration mode was earlier set to simulate only the user is required to specify the units and resolution for t
8. preserve battery power the Ezecal will automatically turn itself off if no keys are pressed for a certain time This time may be set from 5 to 99 minutes using the Up and Down arrow keys The unit will provide 10 seconds warning that it is about to power off by beeping once per second each beep being longer than the previous To prevent the unit from switching off simply press any key 2 6 2 Backlight timeout The Ezecal is equipped with a display backlight that aids viewing of the display under bad light conditions In order to preserve battery power the Ezecal will automatically turn off the backlight if no keys are pressed for a certain time This time may be set from 1 to 60 seconds using the Up and Down arrow keys or by entering the time required using the numeric keys If the backlight is not required it can be turned off by entering a value of zero 2 6 3 Recall timer The Ezecal 6 may be set to recall automatically values previously stored in its 10 memories See section 2 5 4 Timed recall of saved values The automatic recall occurs at fixed time intervals which may be set from 1 to 240 seconds using the Up and Down arrow keys or by entering the time required using the numeric keys M56 Issue 1 0 Ezecal Model 6 User Manual 11 If the recall timer is not required it can be turned off by entering a value of zero 3 Calibration Records This powerful feature allows many instruments to be calibrated during a da
9. ct either the units or the resolution as required Again use the up and down keys to select the units of your choice Note that linear ranges have fixed units and thus cannot be changed Press the scroll key to advance to the reference junction selection screen Press Shift and to select either the reference mode or the reference temperature as required To change the reference mode use the up key to select Automatic or the down key to select Manual The reference junction mode is only applicable to thermocouple ranges In automatic mode the Ezecal uses its internal temperature sensor to apply cold junction compensation to the input or output This mode is applicable when the unit is wired in compensating or extension cable In manual mode the Ezecal assumes that the reference cold junction is external to the unit and it is up to the user to enter the temperature of this junction as appropriate Use the numeric keys to enter the temperature in the selected units Alternatively use the up and down keys to drive the displayed value to the temperature required Press the scroll button to return to the main menu 2 5 3 Saving and recalling frequently used values The Ezecal 6 has ten memories in which simulate values can be stored These may be used to store frequently used output values Such as 0 and 1000 To store a value in memory first of all enter the M56 Issue 1 0 Ezecal Model 6 User Manual 9 simulat
10. e value as normal for example 100 0 Then press the Store key Shift Up arrow The display will indicate on the top line that a store is in progress Now press a numeric key appropriate to the memory in which you wish to store the value The value will be stored in the selected memory To recover a value from memory press the Recall key Shift Down arrow The top line of the display will indicate that a recall is in progress Press the number key corresponding to the memory that you wish to recall and the value from the memory will be used as the current simulation value Press another number to recall from a different memory The user may cycle through all the values in memory by using the Up arrow key to select the next memory or the Down arrow key to select the previous memory If the value stored in a selected memory is not suitable for the current simulation range then the value will not be used and an error message is displayed To cancel recall mode simply press the Recall key Shift Down arrow again 2 5 4 Timed recall of saved values There are occasions when it is useful to recall stored values automatically at regular intervals For example if the Ezecal 6 is being used to check the calibration of a device with a remote display it may be inconvenient for the user to manually select the simulate values In this case the Ezecal 6 may be set to recall automatically values previously stored in its 10 memories To
11. eeseaneeseeeaneeeaees 14 3 3 3 Recording the post Calibration result 14 3 3 4 Closing the calibration le rzustetebuecugeebete eeetge eereiedeeegtete SES teg 14 3 4 Erasing a calibration Tiles fesse etka ee eee ect ats Sale adn toed tes ele 14 3 5 Viewing a calibration TE 15 A ele E 15 41 COMMUNICATIONS Connection aii wa Ged ele eee ee Rare cn ede 15 42 G mmand Protocol EE 16 4 2 1 Command Sy N AA aa aa elias aa aaa naaa aa aaae tine eect ads lane 16 4 2 2 Examples of messages eegend Eeer 17 4 2 3 Numere dala ee aee ee eer 17 4 2 4 Coded Re EE 18 4 2 5 EE 18 5 Specificato N S aa aaee Sarari ae raaa aa da Ea ea Tae crtvscenaisdadssdrnecesmasthdnuantaceanaatadsbeanndens 19 5 1 EE EE eet 19 5 2 Standard Thermocouple Ranges European Version 19 5 3 Standard Thermocouple Ranges US Version 20 5 4 Measurement and simulation accuracy thermocouple ranges 20 M56 Issue 1 0 2 Ezecal Model 6 User Manual 1 Introduction The Ezecal Model 6 is a generatpurpose tool intended for the calibration of control equipment instrumentation and transducers It can both simulate and measure simultaneously and provides galvanic isolation between its output and input The Ezecal Model 6 is a high precision instrument and as such must be recalibrated regularly at least once per year to maintain optimum performance For the users convenience the date of the last calibration is shown on the display every time the unit is switched on 1
12. he measured values to be manually recorded Enter the units of measure using the usual text entry method 3 chars max and press Enter when complete Press Shift and to select the next field for entry Enter the required resolution for the measured values using the up and down arrow keys Simulate and Measure mode If the calibration mode was earlier set to simulate and measure the user is required to specify the range and units for the measured input Select the required range using the up and down arrow keys Press Shift and to select the next field for entry Select the required units for the measurement range Note Not all ranges have selectable units Press the Scroll key when input is complete M56 Issue 1 0 Ezecal Model 6 User Manual 13 Finally confirm that you really do wish to create a new file Select Yes or No using the up and down keys and press the enter key to register your choice 3 2 Opening a calibration file From the main menu Press 4 to advance to the Cal Records menu Press 2 to open a calibration record file The display will now show the list of files currently available Files that are complete are marked with a tick Use the up and down arrow keys to indicate the file to be opened and press enter to open the file When the file is opened the ranges will be set up as specified in the file Also the first calibration point will be activated and the display will revert to
13. he thermocouple is connected in this manner the Ezecal measurement reference junction mode should be set to Automatic M56 Issue 1 0 Ezecal Model 6 User Manual 5 Alternatively an external reference junction may be used In this case the cables from the reference junction should ee be connected as shown and the Ezecal measurement reference junction mode should be set to Manual The temperature of the reference junction should be entered as the reference temperature Compensating CD Cable l D Thermocouple 2 4 2 Voltage measurement Connect the voltage source directly to the Ezecal as shown Select the 100mV or 10V measuring range as appropriate For low level voltage measurement please see section XX for hints on accurate measurement 2 4 3 Current measurement Devices in the field which source current such as controller outputs and powered transmitters may be measured by connecting them directly to the Ezecal as shown Select the 20mA measuring range The Ezecal 6 uses a 5 Ohm current measuring shunt and hence only drops 100mV at 20mA M56 Issue 1 0 6 Ezecal Model 6 User Manual Other devices such as loop powered transmitters are only capable of sinking current and hence require a power supply in order to work For these devices a power supply should be wired in series with the current loop 2 4 4 Thermocouple simulation There are two modes of thermocouple simulation available de
14. ly via the keypad Press the scroll key to save the reading or back scroll to cancel 3 3 3 Recording the post calibration result Press the Store key shift up arrow to invoke the Cal Save menu Press 3 to store a post calibration value If the calibration mode for this file is set to Simulate and Measure then the measured value will be entered automatically For simulate only mode the indicated value on the unit under test should be entered manually via the keypad Press the scroll key to save the reading or back scroll to cancel 3 3 4 Closing the calibration file Press the Store key shift up arrow to invoke the Cal Save menu Press 4 to close the currently open calibration file Finally confirm that you really do wish to close the file Select Yes or No using the up and down keys and press the enter key to register your choice 3 4 Erasing a calibration file From the main menu Press 4 to advance to the Cal Records menu Press 3 to erase a calibration record file The display will now show the list of files currently available Files that are complete are marked with a M56 Issue 1 0 Ezecal Model 6 User Manual 15 tick Use the up and down arrow keys to indicate the file to be deleted and press enter to select Finally confirm that you really do wish to erase the file Select Yes or No using the up and down keys and press the enter key to register your choice 3 5 Viewing a calibration file
15. pending on the location of the reference cold junction For connection in compensating or extension cable the wires from the unit under test should be directly connected to the simulation terminals on the Ezecal 6 For best results the bare wires should be tightly clamped under the terminals rather than using plugs Avoid handling the wires or the terminals as much as possible as this tends to warm them up and may introduce measurement errors Compensating cable When the unit is connected in this manner the Ezecal simulation reference junction mode should be set to Automatic Copper Reference Junction Alternatively an external reference junction may be used In this case the cables from the reference junction should be connected as shown and the Ezecal simulation reference junction mode should be set to Manual The temperature of the reference junction should be entered as the reference S temperature Ge oala Compensating Cable CECI LEI M56 Issue 1 0 Ezecal Model 6 User Manual 7 2 4 5 Voltage and current simulation Connect the unit under test directly to the Ezecal as shown Select the 100mV 10V or 20mA simulation range as appropriate For low level voltage simulation please see section XX for hints on accurate simulation When simulating in current mode the Ezecal provides loop power 2 5 Operating displays 2 5 1 The default display The default display is the normal displa
16. pplied communications lead plugs directly into the unit as shown below The communications connector is special to the Ezecal 6 Do not attempt to use any other lead M56 Issue 1 0 16 Ezecal Model 6 User Manual The other end of the lead is terminated in a standard 9 pin D connector that is suitable for connecting directly into a personal computer or laptop 4 2 Command protocol The Ezecal 6 command protocol is a simple system which allows the user to access the internal parameters within the unit 4 2 1 Command syntax Each Ezecal parameter is identified by a two character mnemonic such as SV standing for simulate value Some parameters are indexed such as the value memories VM for these parameters the required index number should be sent in square brackets Write command Index 3 Read command MNEMONIC Command Syntax MNEMONIC le Response Syntax Numeric Every command message uses a two character mnemonic the mnemonics are listed in the table below M56 Issue 1 0 Ezecal Model 6 User Manual 17 Measured range Measured value Measured units junction temperature junction mode equivalent 0 Manual 1 Auto 10 to 50 C or 1 Auto 5 to 99 mins SEENEN WEE 1to 12 2003 to 2099 Simulate range Simulate value Simulate units temperature Simulate reference junction mode CH O 4 2 2 Examples of messages In the following examples lt CR gt should be taken to
17. recall values automatically See section 2 6 3 Recall timer and set the recall the time base to the value required Return to the default display and enter the values required in order into memories zero onwards see section 2 5 3 Saving and recalling frequently used values To start the timed recall press the Recall key Shift Down arrow The current memory number is displayed with the time remaining in minutes and seconds before the next step is invoked The user may force the current step by using the Up arrow key to select the next memory or the Down arrow key to select the previous memory Alternatively press the number key appropriate to the memory required In either case if the step number is manually forced the step timer is reset immediately M56 Issue 1 0 10 Ezecal Model 6 User Manual The Ezecal will cycle through all 10 value memories and then return to memory 0 If a zero or out of range value is encountered in the sequence then the Ezecal will start again at memory 0 To cancel recall mode simply press the Recall key Shift Down arrow again Please note The automatic power off feature is disabled while timed recall is in progress 2 6 Optional settings To gain access to the optional settings press the Scroll key from the default screen and the main menu will appear Press 3 to advance to the options menu Press keys 1 2 or 3 to select the optional setting required 2 6 1 Auto power off In order to
18. the calibration display 3 3 Calibration mode display While a calibration file is open the basic display mode of the Ezecal is the Calibration mode display In this mode the top line of the display shows the name of the calibration file currently open The bottom line of the display shows the calibration point currently selected along witha symbol indicating whether this is a check point G or a cal adjust point To select the next calibration value press the scroll key the previous point may be selected using shift scroll The user may not change range or units while a calibration file is open 3 3 1 Adding a new calibration point Enter the new simulation value required using the numeric keypad or the up down arrow keys in the usual way Press the Store key shift up arrow to invoke the Cal Save menu Press 1 to store a new calibration point Use the up and down keys to select if this point is a check point or a cal point Press the scroll key to save the new point or back scroll to cancel M56 Issue 1 0 14 Ezecal Model 6 User Manual 3 3 2 Recording the pre calibration result Press the Store key shift up arrow to invoke the Cal Save menu Press 2 to store a pre calibration value If the calibration mode for this file is set to Simulate and Measure then the measured value will be entered automatically For simulate only mode the indicated value on the unit under test should be entered manual
19. wed by the Enter key L The decimal point position is taken care of automatically E depending on the range selected Each time a valid key is recognised the Ezecal will emit a short AIOOE beep Se sey on If a number that is outside the valid range is entered the unit d 77 Ee will emit along beep and the number will return to its previous 4 value bly To cancel the current entry press the Cir key Shift Enter Enter and the number will return to its previous value D fi 5 Alternatively the displayed number may be driven up or down using the Up or Down arrow keys As the key is pressed and held down the displayed number changes slowly at first and then increases in speed up to its maximum of approx 500 digits Le per second 2 4 Connections All connections are made to the unit via the four 2mm binding posts at the top of the unit 2 4 1 Thermocouple measurement There are two modes of thermocouple measurement available depending on the location of the reference cold junction Thermocouple Compensating cable For thermocouples wired in compensating or extension cable the wires should be directly connected to the measurement terminals on the Ezecal 6 For best results the bare wires should be tightly clamped under the terminals rather than using plugs Avoid handling the wires or the terminals as much as possible as this tends to warm them up and may introduce measurement errors When t
20. y backlight will illuminate and the unit will emit a short beep The backlight will go off after a preset length of time to preserve battery life 2 1 1 The Scroll key The right arrow key is a special key called Scroll This key is used to select To advance to the next screen the next screen in a sequence Alternatively when used in conjunction DS Pa gh De with the Shift key the user may return to sel t RENE ER eE E eH the previous screen 2 2 Turning the unit on and off To turn on the unit simply press the On key The power up logo display will be shown This display shows the date that Se Ona eaaa the unit was last calibrated Check that this is less than one year ago Ezecal 6 LIG Serial po 10001 Legh Cal on 2 Jul 2003 The unit will switch itself off if no keys are pressed for a set period of time This time may be set by the user from the Options menu The Ezecal gives the user 10 seconds warning that it is about to switch off This is signified by 10 beeps at one second intervals the beeps increasing in length each time To prevent switch off simply press any key Alternatively the unit may be switched off De 1 To turn off the unit immediately by holding down the Shift key and pressing 1 M56 Issue 1 0 4 Ezecal Model 6 User Manual 2 3 Entering numbers The numeric keypad is used to enter numeric data in exactly the same way as a calculator Numbers are entered exactly as written follo
21. y in the field and the results stored within the calibrator Then upon return to the office or car the calibration data may be uploaded to a laptop and calibration certificates printed out and signed A calibration record is a file stored within the calibrator which records the before and after calibration performance of an instrument or transmitter The EZECAL 6 can store up to 10 such files Calibration files may be downloaded from a pc or created as required in the actual unit Create a calibration file or download one from a pc Connect up the item to be calibrated Open the calibration file Select or add calibration points while actually performing the calibration Close the file At a later time e View the calibration file or upload it back to a pc e Erase the calibration file 3 1 Creating a new calibration file From the main menu Press 4 to advance to the Cal Records menu Press 1 to begin creating a new file Enter the name of the file required Use the keypad to enter text in exactly the same way as a mobile phone Use the Up arrow key to select upper case characters indicated by the AB symbol on the top right of the display or press the Down arrow key to select lower case characters indicated by ab on the display Press the enter key when the name is complete Press Shift and to select the next field for entry Enter the tag name of the device to be calibrated This may be the serial number or any
22. y screen that is shown for measurement and simulation Message Line Measured Value Simulate Value Battery indicator Measure Range Simulate Range The measurement value range and units are shown on the left opposite the measurement terminals and the simulated value is show on the right Enter the simulation value required at any time using the numeric keys or use the Up and Down arrow keys For thermocouple ranges the current reference junction mode and temperature canbe displayed by holding down the Shift key The bottom line of the display will then change to show the appropriate values From this screen the main menu screen can be invoked by pressing the Scroll key Any menu function will automatically time out after 20 seconds if no keys are pressed M56 Issue 1 0 8 Ezecal Model 6 User Manual Press the Help key Shift 7 to access brief help for the current screen Press any key to exit the help screen or wait for 10 seconds and it will time out 2 5 2 Changing Range From the default display press the Scroll key and the main menu will appear Press 1 to select the measurement range or 2 to select the simulation range as required The currently selected range will be displayed along with the range standard and limits on the bottom line of the display Use the up and down keys to change the range as required Press the scroll key to advance to the units selection screen Press Shift and to sele
23. ype T Max Total Uncertainty C 2500 0 200 400 600 800 1000 1200 1400 1600 1800 3 Thermocouple Type E Max Total Uncertainty C 200 0 200 400 600 800 1000 1200 1400 1600 1800 C Thermocouple Type B Max Total 2 N Uncertainty C 200 0 200 400 600 800 1000 1200 1400 1600 1800 C Thermocouple Type N Max Total Uncertainty C 200 0 200 400 600 800 1000 1200 1400 1600 1800 C Note that all the base metal thermocouples are very insensitive below 200 and the uncertainty figures are untrustworthy they are included for illustration only M56 Issue 1 0
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