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Fluke 744 [44/138] Using thermocouples
![Fluke 744 [44/138] Using thermocouples](/views2/1005570/page44/bg2c.png)
744
Users Manual
34
Measuring Temperature
Using Thermocouples
The calibrator supports eleven standard
thermocouples, each identified with an alpha
character: E, N, J, K, T, B, R, S, C, L, or U. Table 5
summarizes the ranges and characteristics of the
supported thermocouples.
To measure temperature using a thermocouple,
proceed as follows:
1. Attach the thermocouple leads to the appropriate
TC miniplug, then to the TC input/output as
shown in Figure 13.
One pin is wider than the
other. Do not try to force a miniplug in the wrong
polarization
.
Note
If the calibrator and the thermocouple plug
are at different temperatures, wait one
minute or more for the connector
temperature to stabilize after you plug the
miniplug into the TC input/output.
2. If necessary, press M for MEASURE mode.
3. Press t. The display prompts you to select
the thermocouple type.
4. Select the desired thermocouple type using the
u or d followed by e.
5. If necessary, you can change between
°C or °F
Temperature Units
as follows:
a. Press s.
b. Press the
Next Page softkey twice.
c. Use the u and d keys to move the cursor
to the desired parameter. Then press either
eor the
Choices softkey to choose a
setting for that parameter.
d. Press u or d to move the cursor to the
desired setting.
e. Press eto go back to the sdisplay.
f. Press the Done softkey or sto exit Setup
mode.
6. If necessary, you can change between
ITS-90 or
IPTS-68 Temperature Scale in Setup mode. The
procedure is the same as steps a-f above.
Содержание
- Documenting process calibrator 1
- Documenting process calibrator users manual 1
- Users manual 1
- Limited warranty limitation of liability 2
- Table of contents 3
- Title page 3
- Contents 5
- List of tables 7
- Table title page 7
- Figure title page 9
- List of figures 9
- Documenting process calibrator 11
- Introduction 11
- Standard equipment 13
- 1 red and 1 black 15
- 2 red and 2 black 15
- Ac20 test clip 15
- Documenting process calibrator standard equipment 15
- Figure 1 standard equipment 15
- Jumper 2 black 15
- Tl24 test leads 15
- Tp20 test probe 15
- Figure 1 standard equipment cont 16
- Users manual 16
- Documenting process calibrator safety information 17
- Figure 2 definition of symbols 17
- Safety information 17
- Symbols used on the calibrator and in this manual are explained in figure 2 17
- This calibrator is designed and tested in accordance with iec1010 1 and can csa c22 no 1010 92 use the calibrator only as specified in 17
- This manual otherwise the protection provided by the calibrator may be impaired 17
- Safety information cont 18
- Warning 18
- Safety information cont 19
- Warning cont 19
- Getting started exercise 20
- Documenting process calibrator getting started exercise 21
- Figure 3 jumper connections for demonstration 21
- Figure 4 measure source example 21
- Gj4s eps 21
- Ot03f eps 21
- Figure 5 shows the calibrator input and output jacks table 2 explains their use 22
- Input and output jacks 22
- Operating features 22
- Documenting process calibrator operating features 23
- Figure 5 input output jacks and connectors 23
- Ot05f eps 23
- Choice 24
- Figure 6 keys 24
- Figure 6 shows the calibrator keys and table 3 explains their functions the softkeys are the four unmarked blue keys just below the display softkey functions are defined by the labels that appear above the softkey during operation softkey labels and other display text are shown in this manual in bold type for example 24
- Users manual 24
- Documenting process calibrator operating features 25
- Display 27
- Figure 7 elements of a typical display 28
- Users manual 28
- Setting up the calibrator 29
- Using the strap and bail 29
- Charging the battery 30
- Documenting process calibrator setting up the calibrator 31
- Figure 9 removing the battery and using the charger 31
- Gj9f eps 31
- Battery life 32
- Preserving battery life 33
- Using the optional battery eliminator 33
- Adjusting the display contrast 34
- Displaying the date and time 34
- Selecting the display language 34
- Personalizing the calibrator 36
- Using the backlight 36
- Measurement ranges 38
- Measuring electrical parameters 38
- Using measure mode 38
- Documenting process calibrator using measure mode 39
- Figure 10 electrical measurement connections 39
- Measuring pressure 40
- Testing continuity 40
- Warning 40
- Differential module 43
- Documenting process calibrator using measure mode 43
- Figure 12 connections for measuring pressure 43
- Gage module 43
- Isolation valve 43
- Ot12c eps 43
- Measuring temperature 44
- Using thermocouples 44
- Documenting process calibrator using measure mode 45
- Figure 13 measuring temperature with a thermocouple 46
- Process temperature 46
- Tc miniplug 46
- Users manual 46
- V maximum to 46
- Warning 46
- Documenting process calibrator using measure mode 47
- Is 100 ω most rtds come in a 47
- The calibrator accepts rtd types shown in table 6 rtds are characterized by their resistance at 0 c 32 f which is called the ice point or 47
- The most common 47
- Three terminal configuration the calibrator accepts rtd measurement inputs in two three or four wire connections as shown in figure 15 a four wire configuration provides the highest measurement precision and two wire provides the lowest measurement precision 47
- Using resistance temperature detectors rtds 47
- Figure 15 measuring temperature with an rtd 50
- Gj15f eps 50
- Users manual 50
- Linear output transmitters 51
- Measurement scale 51
- Square law process variables 52
- Measuring or sourcing with custom units 53
- Warning 53
- Damping your measurements 54
- Using the 700 iv current shunt 54
- Sourcing electrical parameters 56
- Using source mode 56
- Common 57
- Documenting process calibrator using source mode 57
- Figure 16 electrical sourcing connections 57
- Simulating a 4 to 20 ma transmitter 58
- Documenting process calibrator using source mode 59
- Figure 17 connections for simulating a 4 to 20 ma transmitter 59
- Loop power supply 59
- Ma ma v v rtd 59
- Meas source 59
- Setup ma 59
- Source 59
- Tc rtd 59
- Supplying loop power 60
- Documenting process calibrator using source mode 61
- Figure 18 connections for supplying loop power 61
- Ma ma v v rtd 61
- Meas source 61
- Setup ma 61
- Source 61
- Tc rtd 61
- V v hz 61
- Sourcing pressure 62
- Warning 62
- Figure 19 connections for sourcing pressure 64
- Hand pump 64
- Ma ma v v rtd 64
- Meas source 64
- Pressure module 64
- Setup ma 64
- Source 64
- Tc rtd 64
- Users manual 64
- Simulating thermocouples 65
- Simulating rtds 66
- Color depends on type of tc 67
- Documenting process calibrator using source mode 67
- Figure 20 connections for simulating a thermocouple 67
- Ma ma v v rtd 67
- Meas source 67
- Setup ma 67
- Source 67
- Tc miniplug 67
- Tc rtd 67
- V v hz 67
- Figure 21 connections for simulating an rtd 68
- Ps ps m in in 68
- Users manual 68
- Linear responding transmitters 69
- Source scale 69
- Square law process variables 69
- Stepping and ramping the output value 70
- Using manual step 70
- Using auto step 71
- Ramping the output 72
- Figure 22 checking a relay output trip alarm 74
- Input 4 20 ma 74
- Ma ma v v rtd 74
- Meas source 74
- Setup ma 74
- Source 74
- Source ma 74
- Tc rtd 74
- Trip relay output 74
- Users manual 74
- Voltage trip detect 74
- Simultaneous measure source 75
- Documenting process calibrator simultaneous measure source 77
- Calibrating a process instrument 78
- Generating as found test data 78
- Figure 23 calibrating a thermocouple temperature transmitter 80
- Ma ma v v rtd 80
- Meas source 80
- Setup ma 80
- Source 80
- Tc miniplug 80
- Tc rtd 80
- Users manual 80
- V v hz 80
- Adjusting the transmitter 83
- As left test run 84
- Calibrating a delta pressure flow instrument 85
- Test comments 85
- Calibrating a limit switch 86
- Transmitter mode 89
- Warning 89
- Memory operations 91
- Saving results 91
- Data logging 93
- Reviewing memory 93
- Clearing memory 96
- Recording min and max measurements 96
- Running a preloaded task 96
- Saving to and recalling from the registers 97
- Using the built in calculator 97
- Quick guide to applications 98
- Using the calculator to set the source value 98
- Circuit 99
- Documenting process calibrator quick guide to applications 99
- Figure 25 calibrating a chart recorder 99
- Figure 26 measuring voltage drop 99
- Ma ma v v rtd 99
- Meas source 99
- Measure v 99
- Setup ma 99
- Source 99
- Tc rtd 99
- V max 30v max 99
- V v hz 99
- Figure 27 monitoring ac line voltage and frequency 100
- Ma ma v v rtd 100
- Meas source 100
- Measure v 100
- Ot27c eps 100
- Setup ma 100
- Source 100
- Tc rtd 100
- Users manual 100
- Documenting process calibrator quick guide to applications 101
- Figure 28 calibrating a current to pressure i p transmitter 101
- Ma ma v v rtd 101
- Meas source 101
- Measure pressure source ma loop power disabled 101
- Pressure module 101
- Setup ma 101
- Source 101
- Tc rtd 101
- V v hz 101
- Figure 29 measuring the output current of a transmitter 102
- Ma ma v v rtd 102
- Meas source 102
- Measure ma loop power disabled 102
- Original circuit wiring 102
- Power supply 102
- Setup ma 102
- Source 102
- Tc rtd 102
- Users manual 102
- V v hz 102
- Circuit 103
- Documenting process calibrator quick guide to applications 103
- Figure 30 measuring a precision resistor 103
- Figure 31 sourcing resistance 103
- Ma ma v v rtd 103
- Meas source 103
- Measure resistance 103
- Setup ma 103
- Source 103
- Source resistance 103
- Tc rtd 103
- V v hz 103
- Figure 32 checking a switch 104
- Figure 33 checking a tachometer 104
- Ma ma v v rtd 104
- Meas source 104
- Measure continuity 104
- Measure frequency 104
- Setup ma 104
- Source 104
- Tc rtd 104
- Users manual 104
- V v hz 104
- Documenting process calibrator quick guide to applications 105
- Figure 34 calibrating a pressure to current p i transmitter 105
- Hand pump 105
- Ma ma v v rtd 105
- Meas source 105
- Measure ma source pressure loop power enabled 24v 105
- Pressure module 105
- Setup ma 105
- Source 105
- Tc rtd 105
- V v hz 105
- Figure 35 calibrating a mv to current transmitter 106
- Users manual 106
- Documenting process calibrator quick guide to applications 107
- Figure 36 checking a vortex shedding flowmeter 107
- Ma ma v v rtd 107
- Meas source 107
- Measure frequency 107
- Setup ma 107
- Source 107
- Tc rtd 107
- Communicating with a pc 108
- Maintenance 108
- Replacing the battery pack 108
- Calibration data 109
- Cleaning the calibrator 109
- In case of difficulty 109
- Internal lithium backup battery 109
- Service center calibration or repair 110
- Accessories later in this manual for model or part numbers of standard and optional equipment 111
- Documenting process calibrator replacement parts 111
- Replacement parts 111
- Table 9 lists the fluke part number of each user replaceable part for model 744 see standard equipment near the front of this manual and 111
- Accessories 112
- Specifications 114
- Dc voltage measurement 115
- Documenting process calibrator specifications 115
- Ac voltage measurement 116
- Dc current measurement 117
- Documenting process calibrator specifications 117
- Resistance measurement 117
- Continuity testing 118
- Frequency measurement 118
- Dc voltage output 119
- Documenting process calibrator specifications 119
- Dc current output 120
- Documenting process calibrator specifications 121
- Resistance sourcing 121
- Frequency sourcing 122
- Documenting process calibrator specifications 123
- Temperature thermocouples 123
- Temperature thermocouples cont 124
- Documenting process calibrator specifications 125
- Temperature thermocouples cont 125
- Temperature resistance temperature detectors 126
- Documenting process calibrator specifications 127
- Temperature resistance temperature detectors cont 127
- Loop power supply 128
- Documenting process calibrator specifications 129
- Top and bottom limits of ranges with auto range on 129
- Top and bottom limits of ranges with auto range on cont 130
- General specifications 131
- Documenting process calibrator specifications 133
- Figure 37 lcd operating environment specification 133
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