EZECAL MK4 USER MANUAL - FGH Controls Limited Homepage
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1. 3 3 Recall mode 600 HOHE K G ij3 K D H it 5 D Vi CIK o NH K A nr Q Q ojia A O D w g olie t ojis on In LEARN mode Press LRN again to exit Recall mode is used to recall one or more preset temperatures previously stored in the learn mode These temperatures may be recalled manually or in sequence using the time base facility The EZECAL can also be set to ramp between the preset temperatures if required To enter RECALL mode RCL Recall mode display indications OUTPUT 1000 C Type K CJC Auto Timebase Off Enable using Timebase 0 2m Enter value reqd Timebase 60 0m Enter value reqd Rcl mode Step Select Using Rcl mode Ramp Select Using Rcl 0 t 100 C Type K CJC Auto First activate the time base if required Timebase activated Enter timebase value up to 999 9 mins Now set recall mode Step or Ramp Change to ramp mode if Required using key Press scroll to enter recall mode Recall mode indicator Down ramp Up ramp Step Dwell Simulated temperature T its C Current step number SPORE oF Indicates RECALL eae mode RCL 0 7 100 0 C Type K CJC Auto e Oo D gt lt T Cold Junction mode Auto Man Not shown in linear mode CDM O M29 Issue 2 EZECAL MK4 User Manual 14 In recall mode it is not possible to manually enter temperatures 3 3 1 Recalling a series of tempe2. specified under BS 4937 these are Pt10 Rh Pt type S Pt13 Rh Pt type R Fe Cu type J NiCr NiAl type K Cu CuNi type T NiCr CuNi type E Pt30 Rh Pt6 Rh type B NiCrSi NiSi type N also Linear millivolts 50 0 to 1767 0 50 0 to 1767 0 210 0 to 1200 0 270 0 to 1372 0 270 0 to 400 0 270 0 to 1000 0 0 0 to 1820 270 0 to 1300 99 99 to 99 99 degs C degs C degs C degs C degs C degs C degs C degs C mV and equivalents in degs F One custom thermocouple range may also be included to special order W5 Re W26 Re type W5 0 0 to 2320 0 Fe CuNi type L DIN 43710 200 0 to 900 and equivalents in degs F degs C degs C The sensor type is set by using the scroll key until the thermocouple type is displayed and then pressing a numeric key to set the required type Custom ranges are always invoked using key 9 For example OUTPUT 1760 0 C Type S CJC Man ICE gt wa Select using Thermocouple Select using 0 Thermocouple i Select using Thermocouple Lin Select using 0 9 Display shows current type to set type K to set type W5 custom range to set linear M29 Issue 2 EZECAL MK4 User Manual 9 2 2 Selecting the temperature units The EZECAL can work in either degs C or degs F To change the temperature units press the SCROLL key until the temp units message is displayed and then use the key to toggle between degs C and degs F For example l Temp U
3. Then using the RECALL mode each instrument could be checked very quickly and easily by recalling each test temperature with a single keystroke Alternatively the time base facility could be used to automatically step through the sequence of temperatures without user intervention 2 1 Programming a series of temperatures In order to teach the simulator a series of temperatures The EZECAL must be in SIMULATE MODE see section 3 0 LEARN mode is activated simply by pressing the LRN keypad ee From Simulate mode Type K CJC Auto LRN Lrn 0 0 Enter LEARN mode Enter reqd value Value programmed For current step Lrn 0 1234 Enter reqd value The LEARN mode display Step number Indicates LEARN J Learn mode can store up to 10 step values Each step is assigned a number 0 to 9 and this is shown on the display at all times To teach the EZECAL a new step value the SCROLL key should be used to select the required step number OUTPUT 1234 Enter reqd value Lrn 6 0 i Select step required gt gt Until Enter reqd value Ren Lrn 6 600 L L Enter reqd value Lrn 6 600 Use ENT to store value gt Enter reqd value The step values shown in learn mode are unitless and could be degs C degs F or millivolts This allows the user the flexibility of recalling the programmed steps with any sensor type or temperature units required M29 Issue 2 EZECAL MK4 User Manual 13 To exit from learn mode
4. sensor type and temperature units in which they were logged The EZECAL will force the sensor type and units automatically As each value is replayed the EZECAL will simulate the replayed temperature and this emf will appear with relevant compensation on the output terminals To start the replay D Timebase 60 0m Enter value reqd Rpy 01 100 0 C Type K CJC Auto Press scroll to enter Replay mode M29 Issue 2 EZECAL MK4 User Manual 20 Display indications during REPLAY mode Recall mode display indications Replayed temperature Replay step number Temp C Indicates Replay unis F Mode Rpy 01 100 0 C Type K CJC Auto m f Sensor S Cold Paneer Mode R uto type J Man x not shown in linear mode E B N Linear When first entering replay mode initially the replayed step number will be one the user may manually step through the values by use ofthe ENT key forwards and the CLR key backwards Rcl 01 100 0 C Type K CJC Auto Rel 02 200 0 C ENT f Type K CJC Auto SSP ONE CER PPY OP 100 Ore or backwards 7 Type K CJC Auto If the time base facility was enabled and a non zero time was entered then the EZECAL will automatically step through the logged values one step every time base When the step number reaches 50 or the number of logged values the step number will wrap around to step one again The steps may still be recalled manually as in the above example In this
5. Average and oscillation period of logged values The average and period values are displayed immediately after the maximum and minimum values by pressing the SCROLL key Average 225 0 C gt Period 3 8m The displayed average is the average of all of the logged values taken The oscillation period is the time between the last 2 successive peaks during the logging period provided at least 2 peaks were detected If no peaks were detected during the log then the period value is displayed as none Average 120 5 C Period None M29 Issue 2 EZECAL MK4 User Manual 19 4 3 3 Setting the replay time base The logged values may be replayed at any speed regardless of the timebase used at the time they were recorded This enables the values to be replayed rapidly into a chart recorder for instance The replay timebase can be either off manual replay or a value between 0 1 and 999 9 minutes and is set exactly as the log and recall timebases gt Timebase off Enable using 4 3 4 Replaying the logged values Average 120 5 C Period 3 8m Timebase 0 2m Enter value reqd Timebase 60 0m Enter value reqd First activate the time base if required Timebase activated Enter timebase value up to 999 9 mins The values recorded during the log may be replayed in sequence using the time base or may be manually replayed by means of the keypad In either case the values must be replayed in the same
6. cadmium batteries These batteries may be recharged as required using the optional EZECAL recharging unit If necessary the batteries may be replaced with alkaline or zinc carbon batteries however these must be thrown away when they run out and under no circumstances should any attempt be made to recharge them Cell size AA R6 MN1500 To install new batteries first ensure the EZECAL is switched off and remove the lid of the battery compartment by lightly pressing the region marked OPEN and sliding the lid towards the terminals Remove the old batteries and dispose of them carefully Fit the new batteries observing the polarity markings printed inside the compartment and on the battery and refit the lid The EZECAL is now ready for use Recharging Nickel Cadmium batteries The EZECAL may be recharged either from the optional mains adapter or car cigar lighter adapter To recharge first switch off the EZECAL and then plug the charging lead into the side of the unit Leave the unit for 16 hours to fully charge the batteries The EZECAL will provide approximately 20 hours of continuous use with freshly charged batteries If necessary the EZECAL may be used whilst charging is in progress in this case recharging will take slightly longer to complete WARNING DO NOT USE THE CHARGER UNIT TO POWER THE EZECAL EXCEPT WHEN RECHARGEABLE BATTERIES ARE FITTED M29 Issue 2 EZECAL MK4 User Manual 3 1 2 Nomenclature Black Common Te
7. case the time base will be restarted after every manual step If a long time base period is used it may be useful to know how much time is left until the next step This can be displayed if the key is pressed and will appear on the bottom display line as long as the key is held down M29 Issue 2 EZECAL MK4 User Manual 21 Rpy 04 100 0 C Type K CJC Auto REY 2817 200 2050 Time to next step shown J Next step 2 0m To terminate the replay at any time and return to measure mode simply press the RCL key again Rpy 24 100 0 C Type K CJC Auto INPUT 123 4 C Type K CJC Auto M29 Issue 2 EZECAL MK4 User Manual 22 5 Specifications 5 1 Physical Size uncased 200 x 100 x 45mm Weight 450g Power source 4x AA NiCd rechargeable batteries Battery life approx 20 hours continuous use Ambient temp 10 to 40 C Humidity 0 to 95 RH non condensing Case material Black A B S 5 2 Electrical Simulation and Measuring Basic resolution 5uV 1 in 40000 Basic linear accuracy better than 0 05 of span at ref conditions 20 C 50 RH Setting resolution Thermocouple ranges 0 1 deg C or 0 1 deg F Linear range 10uV Input noise rejection better than 70dB Sampling frequency 20 samples per second Display update time 0 8 seconds Cold junction Accuracy 0 25 C Resolution 0 1 GorF Range auto mode 10 0 to 40 0 C manual mode 10 0 to 55 0 C CJ rejection Bette
8. flag Measured temperature Current log number Temp C Indicates Log Mode p units F Log 23 1000 0 C Type K CJC Auto Sensor S u Cold junction Mode R Auto Type J Man gt not shown in linear mode E B N Linear At any time during the log the time remaining to the next log may be displayed by pressing the key This display will remain for as long as the key is held down Log 23 1000 0 Type K CJC Auto Log 23 1000 0 C Fe Next log 3 5m To stop the log and exit log modes simply press the LRN key Log 23 1000 0 C Type K CJC Auto Input 1000 0 C LAN Type K CJC Auto The log values stored may now be examined or replayed in REPLAY mode see following section M29 Issue 2 EZECAL MK4 User Manual 18 4 3 Replay Mode Replay mode is used to examine and replay the logged values obtained in log mode Associated data such as maximum and minimum average and period can also be examined in this mode To invoke REPLAY mode INPUT gF 1000 0 C Type K CJC Auto RCL aximum 250 0 C Minimum 200 0 C 4 3 1 Maximum and minimum logged values Whilst logging was in progress the EZECAL kept a record of the maximum and minimum of the logged values These values are shown as the first display in replay mode Maximum 250 0 C Minimum 200 0 C If there were no logged values and hence no maximum or minimum then an error message will be displayed Maximum None Minimum None 4 3 2
9. is no need to enter this temperature the EZECAL will measure the temperature automatically and its value will be shown on the display If this measured temperature is outside the specified limits of 10 to 40 degs C or equivalent and error message will be displayed M29 Issue 2 EZECAL MK4 User Manual 10 3 0 For example in MANUAL CJC mode gt CJ Temp 24 0 C Existing CJ temp es until From 10 to 55 C is displayed CJ Temp 2 From 10 to 55 C CJ Temp 2 8 From 10 to 55 C CJ Temp 28 5 From 10 to 55 C CJ Temp 28 5 C From 10 to 55 C EE m Z par A new cold junction temperature of 28 5 degs C has now been entered In AUTOMATIC CJC mode Display shows internally measured CJ temperature CJ Temp 24 2 C Display indicates measured CJ temperature is out of range CJ Temp Error CJ RANGE ERROR 0 Simulation Mode Simulation mode is used to simulate the set thermocouple type The required temperature is entered on the keypad and the equivalent emf with compensation if required will be output to the simulate terminals directly after the ENT key is pressed First of all the EZECAL must be set to SIMULATE mode i Mode Measure Existing mode is until Select Using displayed Mode Simulate Mode changed to Select Using Simulate M29 Issue 2 EZECAL MK4 User Manual 11 3 1 1 Simulation mode display indications Simulation mode is recognised by the wo
10. 00 0 C Time to next step shown Next step 2 0m p M29 Issue 2 EZECAL MK4 User Manual 15 4 0 Measure Mode Measure mode is used to measure the emf signals from the set type of thermocouple The actual temperature is shown on the correctly compensated dependant upon the compensation mode set See section 2 3 To set the EZECAL to MEASURE MODE OD Mode Simulate Existing mode is T until Select Using displayed Mode Measure Mode changed to Select Using Measure Measure mode display indications Measure mode is recognised by the word INPUT appearing on the top line of the display The current sensor type cold junction compensation mode is also displayed along with any 2 Measured temperature Measurement in P progress flag mis C Indicates Measure unts F neer E INPUT 1000 0 C Type K CJC Auto ul Sensor S old even Mode R Auto Type J Man K not shown in linear mode E B N Linear error conditions that may arise If the measured temperature is outside the valid range for the type of sensor selected the display will indicate a range error INPUT M Error OUT OF RANGE If the cold junction temperature is outside the allowed limits the display will indicate a cold junction error INPUT jf Error CJ RANGE ERROR M29 Issue 2 EZECAL MK4 User Manual 16 4 2 Log Mode Log mode may be used by the user to log or monitor a thermocouple over a period of time The EZ
11. ECAL will store up to 50 temperatures whilst logging If the unit is left for a long time such that more than 50 readings are taken then the last 50 will be remembered The logged values may be replayed at a later stage speeded up or slowed down into a chart recorder or any desired instrument Whilst logging the EZECAL will keep a separate note of the maximum and minimum temperatures encountered along with the average temperature and the period of any oscillation encountered Log mode may only be invoked from measure mode by pressing the LRN key INPUT nf 1000 0 C Type K CJC Auto Timebase off LRN Enable using 4 2 1 Setting the log timebase As log mode is invoked the log timebase is displayed This is the desired time interval between each log For log mode the time base must be enabled and have a value set between 0 1 and 999 9 minutes Timebase off Enable using a Timebase 0 2m timebase activated Enter value reqd s Jo Jo Jen Timebase 60 0m Enter timebase value A un Enter value reqd up to 999 9 mins 4 2 2 Starting and stopping the log The log is started simply by pressing the scroll key and will continue logging until manually stopped Timebase 60 0m Enter value reqd Log 01 100 0 c Press scroll to start gt Type K CJC Auto logging M29 Issue 2 EZECAL MK4 User Manual 17 The following screen will be displayed throughout the log Measurement in progress
12. EZECAL MK4 USER MANUAL EZECAL MK4 User Manual 1 EZECAL MK4 USER MANUAL Contents 1 0 General 2 1 1 Battery installation replacement and recharging 2 1 2 Nomenclature 3 1 3 Connecting the EZECAL in simulation mode 4 1 4 Connecting the EZECAL in measure mode 5 1 5 Using the keyboard 7 2 0 Setting up the EZECAL 8 2 1 Setting the thermocouple type 8 2 2 Selecting the temperature units 9 2 3 Selecting Cold junction Compensation mode 9 2 4 Cold junction compensation temperature 9 3 0 Simulation Mode 10 3 1 1 Simulation mode display indications 11 3 1 2 Manual temperature simulation 11 3 2 Learn Mode 12 3 2 1 Programming a series of temperatures 12 3 3 Recall mode 13 3 3 1 Recalling a series of temperatures 14 4 0 Measure Mode 15 4 1 Measure mode display indications 15 4 2 Log Mode 16 4 2 1 Setting the log timebase 16 4 2 2 Starting and stopping the log 16 4 3 Replay Mode 18 4 3 1 Maximum and minimum logged values 18 4 3 2 Average and oscillation period of logged values 18 4 3 3 Setting the replay time base 19 5 0 Specifications 22 5 1 Physical 22 5 2 Electrical 22 5 3 Conformity Table 23 M29 Issue 2 EZECAL MK4 User Manual 2 1 General Thank you for purchasing this superb piece of British engineering If you look after it carefully it will reward you with many years of faithful service 1 1 Battery installation replacement and recharging The EZECAL is supplied with 4 off AA size nickel
13. ess the numeric keys in the usual order On the first key press the existing number will be cleared and a flashing cursor and question mark will appear The cursor indicates where the next number pressed will be displayed Digits already entered will be shifted one space to the left The ENT key must be used at all times to enter the number at which point the cursor and question mark will disappear Negative numbers are entered by using the key to negate the number entered at any time Mistakes can be corrected by pressing the CLR key at any time during input and re entering the correct number Alternatively the incorrect number may be overwritten by the correct one after pressing the ENT key Examples Entering a positive number Entering a negative number existing display 100 0 C existing display 100 0 C L 12 3 10 0 i ENT 12 3 C 10 0 gt ENT 10 0 C gt Correcting a mistake Entering a number out of limits existing display 1000 C existing display 0 C G CLR ENT Error K m 2 i f 1 3 1 6 ENT 1 3 C ENT 1 6 C M29 Issue 2 EZECAL MK4 User Manual 2 Setting up the EZECAL This section describes how to set up the EZECAL to simulate or measure the particular thermocouple of interest the temperature units and the cold junction compensation mode 2 1 Setting the thermocouple type The EZECAL can simulate or measure any of the eight standard thermocouple types
14. its own terminals and adjust the output emf to compensate Compensating cable Thermocouple M29 Issue 2 EZECAL MK4 User Manual 6 MANUAL COLD JUNCTION METHOD 1 The EZECAL is wired in copper cable to a reference junction and hence in the appropriate compensating cable to the instrument under test For this method of connection the EZECAL should be set to its MANUAL compensation mode and the temperature of the reference junction entered see sections 2 3 and 2 4 The reference junction point can be any stable or temperature controlled environment between 10 and 55 C Copper cable Compensating cable Thermocouple Reference Junction MANUAL COLD JUNCTION METHOD 2 The EZECAL is wired in copper cable to the instrument under test For this method the simulator should be put into its MANUAL compensation mode and the temperature at the terminals of the instrument under test entered See sections 2 3 and 2 4 This method of connection is the least reliable of the three described and should only be used for very rough temperature measurements Copper cable Thermocouple NOTE For measurements with type B thermocouples or linear transducers the EZECAL should be connected as shown above The set mode of compensation does not matter in this case M29 Issue 2 EZECAL MK4 User Manual 7 1 5 Using the keyboard The numeric keypad on the EZECAL is used just like a calculator To enter a number simply pr
15. nce in the appropriate compensating cable to the instrument under test For this method of connection the EZECAL should be set to its MANUAL compensation mode and the temperature of the reference junction entered see sections 2 3 and 2 4 The reference junction point can be any stable or temperature controlled environment between 10 and 55 C melting ice is commonly used as a reference environment of 0 C Copper cable Compensating cable Reference Junction M29 Issue 2 EZECAL MK4 User Manual 5 MANUAL COLD JUNCTION METHOD 2 The EZECAL is wired in copper cable to the instrument under test For this method the simulator should be put into its MANUAL compensation mode and the temperature at the terminals of the instrument under test entered see sections 2 3 and 2 4 This method of connection is the least reliable of the three described and should only be used for rough checking as changes in ambient temperature will affect the readings on the instrument under test Copper cable 1 4 Connecting the EZECAL in measure mode In order to use the Ezecal to measure temperature via a thermocouple the EZECAL should be connected in one of the three following ways AUTOMATIC COLD JUNCTION METHOD The EZECAL is wired to the instrument under test in the appropriate compensation cable The EZECAL should be set to its AUTO cold junction mode see section 2 3 In this mode the EZECAL will automatically measure the temperature of
16. nge is this error plus the error due the basic linear accuracy of 0 05 M29 Issue 2 EZECAL MK4 User Manual NOTES 24 M29 Issue 2 EZECAL MK4 User Manual NOTES 25 M29 Issue 2 EZECAL MK4 User Manual NOTES 26 M29 Issue 2
17. nits C Display shows that u until Select Using degs C selected Temp Units F Changed units to Select Using degs F 2 3 Selecting Cold junction Compensation mode The EZECAL is capable of measuring the temperature of its terminals and adjusting the simulated output or measured input accordingly This automatic adjustment can be switched on or off as required depending on the way the unitis connected see section 1 4 If compensation cable is used to connect the EZECAL to the thermocouple or instrument then the automatic mode should be used If however an external reference junction is used then the manual mode should be selected and the reference temperature should be entered To switch between automatic or manual compensation press the SCROLL key until the compensation message is displayed Then use the key to toggle between AUTO and MANUAL For example gt i Cold junct auto Display shows auto un until Select Using mode Cold junct man Changed to LR Select Using manual mode 2 4 Cold junction compensation temperature For operation in manual cold junction mode it is up to the user to enter in the actual cold junction temperature The location of the cold junction depends on how the EZECAL is wired see sections 1 3 and 1 4 The valid range for this temperature is 10 to 55 degs C or 14 to 131 degs F The lower line of the display indicates the valid range In Automatic compensation mode there
18. r than 20 1 Ranges to BS4937 Type S 50 0 to 1767 0 degs C Type R 50 0 to 1767 0 degs C Type J 210 0 to 1200 0 degs C Type K 270 0 to 1372 0 degs C Type T 270 0 to 400 0 degs C Type E 270 0 to 1000 0 degs C Type B 0 0 to 1820 0 degs C Type N 270 0 to 1300 0 degs C and equivalents in degs F Linear 99 99 to 99 99 mV Output impedance Less than 0 1 Ohms Max output current 1 milliamp Warm up time Less than 1 minute Output settle time 2 seconds to 99 Battery low detection 4 5 Volts Recharge time approx 16 hours from low bat using approved charger Power consumption 100mW max M29 Issue 2 EZECAL MK4 User Manual 23 5 3 Conformity Table TYPE S R RANGE 50 to 0 0 to 1767 50 to 22 20 to 4 5 to 50 51 to 1749 210 to 140 139 to 2 3 to 50 51 to 1200 270 to 250 249 to 99 100 to 1373 270 to 250 249 to 110 109 to 400 270 to 250 249 to 160 159 to 0 0 to 229 230 to 1000 58 to 161 162 to 250 251 to 750 751 to 1820 270 to 235 234 to 170 169 to 0 0 to 1300 MAX ERROR C 1 17 0 73 1 75 0 2 0 12 0 69 0 18 0 08 0 29 0 24 2 0 0 24 0 32 1 00 0 4 0 17 1 5 0 27 0 1 0 44 0 16 5 49 1 81 1 52 0 64 3 01 0 63 0 25 0 38 The above table shows the worse case error due to the internal lineariser which may be expected on the given thermocouple over the specified temperature range The absolute error on any given ra
19. ratures When first entering recall mode initially the recalled step number will be zero however any of the 10 available steps can be recalled simply by pressing the relevant numeric key L Rel 0 100 0 C Type K CJC Auto Rcl 6 600 0 C Type K CJC Auto Rcl 9 900 0 C Type K CJC Auto Initially step 0 is invoked Step 6 called up directly or step 9 If the programmed values were intended to be used as a sequence then the user may manually step through this sequence by use of the ENT key forwards and the CLR key backwards ENT gt CLR lt Rcl 0 100 0 C Type K CJC Auto Rcl 1 200 0 C Type K CJC Auto Rcl O 100 0 C Type K CJC Auto Steps forwards or backwards If the time base facility was enabled and a non zero time was entered then the EZECAL will automatically step through the sequence one step every time base period When the step number reaches 9 or a step value is found to be zero the step number will wrap around to step zero again The steps may still be recalled manually as in the above two examples In this case the time base will be restarted after every manual step If a long time base period is used it may be useful to know how much time is left until the next step This can be displayed ifthe key is pressed and will appear on the bottom display line as long as the key is held down XD Q mar O L oO oO Oo Q Type K CJC Auto Rcl 17 2
20. rd OUTPUT appearing on the top line of the display The current set up and actual temperature being simulated is also displayed along Simulated temperature Temp units F Indicates Simulate md OUTPUT 1000 0 C Type K CJC Auto Sensor Type Cold Junction Mode R Auto J Man us not shown in linear mode E B N Linear with any error conditions that may arise 3 1 2 Manual temperature simulation In simulation mode the required temperature is simply entered on the keypad and if valid will appear at the output terminals upon depression of the ENT key If the entered temperature is outside the valid range for the sensor selected then an error screen will appear OUTPUT Error OUT OF RANGE This error is quickly cleared by simply pressing CLR or re entering a valid temperature OUTPUT Error OUT OF RANGE OUTPUT OUT OF RANGE To enter a temperature for simulation For example 1000 0 C e AA AL gt Type K CJC Auto Negative temperatures are also easily entered A ZU UL J Type K CJC Auto M29 Issue 2 EZECAL MK4 User Manual 12 3 2 Learn Mode The LEARN mode is used to program the simulator to produce a series of temperatures This is useful if for instance the user wishes to check the calibration of several instruments at various positions in their range In this case the user could use learn mode to teach the simulator the required list of temperatures
21. rminal Yellow Input Terminal Red Output Terminal er LCD Display FGH Controls Ltd EZECAL MK4 Charging Socket Gr Js JC Keypads CERED ED __ L gt On Off Switch o Learn Log mode select button Recall Replay mode select button T gt Function select Scroll button a2 Sign change Toggle button Clear Backward step button Numeric Keypad Sensor Type I oi Enter Forward step button M29 Issue 2 EZECAL MK4 User Manual 4 1 3 Connecting the EZECAL in simulation mode The EZECAL unit is intended for the calibration and checking of temperature measurement or control instruments using any of the BS 4937 standard thermocouples The simulator eliminates the need for thermocouple emf look up tables tedious cold junction calculations and temperature unit conversions It also provides a rapid means of checking the actual thermocouple For thermocouple simulation purposes the EZECAL unit can be connected to the instrument under test in three different ways AUTOMATIC COLD JUNCTION METHOD The EZECAL is wired to the instrument under test in the appropriate compensation cable The EZECAL should be set to its AUTO cold junction mode see section 2 3 In this mode the EZECAL will automatically measure the temperature of its own terminals and adjust the output emf to compensate Compensating cable MANUAL COLD JUNCTION METHOD 1 The EZECAL is wired in copper cable to a reference junction and he
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