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Инструкция по эксплуатации Страница: 128

Fluke 744 [128/138] Loop power supply

744

Users Manual

118

Loop Power Supply

Setting 1 Year 2 Year

24 Volt 5% 5%

28 Volt 5% 5%

Short circuit protected

Maximum Current: 22 mA

Maximum Input Voltage: 30 V dc

Output Resistance: 250 Ω nominal

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

Fluke 744 [128/138] Loop power supply

Содержание

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