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Fluke 725 [68/80] Calibrating ma input fluke 725 and 726 only
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724/725/726
Calibration Manual
60
Calibrating mA Input (Fluke 725 and 726 only)
Connect the UUT as shown in Figure 26.
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Figure 26. mA Input Calibration Connections
After making the proper connections, type “3” then press the Enter key on the PC
keyboard. Input directions are displayed at the bottom of the calibration menu:
Enter Selection:
Input 0 mA, Press Enter When Stable
Input 24 mA, Press Enter When Stable
Use the 5520A to input 0 mA and then 24 mA.
Содержание
- 725 726 1
- 725 726 calibration manual 1
- Calibration manual 1
- Calibrators 1
- Warranty 2
- Table of contents 3
- List of tables 5
- 725 726 6
- List of figures 7
- 725 726 8
- Contacting fluke 9
- Introduction 9
- Read first safety information 10
- International symbols 11
- 725 726 12
- Dc ma measurement and source 724 and 725 measurement only for 724 12
- Dc voltage measurement 724 and 725 12
- Dc voltage measurement and source 726 12
- Dc voltage source 724 and 725 12
- Note a count is the amount by which the least significant digit can vary 12
- Performance and accuracy are specified for one year after calibration at operating temperatures of 18 c to 28 c 64 f to 82 f in relative humidity to 90 after a 5 minute warm up period 12
- Specifications 12
- Calibrators specifications 13
- Dc ma measurement and source 726 13
- Ohms measurement 724 and 725 13
- Ohms measurement 726 13
- Ohms source 724 and 725 13
- 725 726 14
- Frequency measurement 725 14
- Frequency measurement 726 14
- Frequency source 725 14
- Ohms source 726 14
- Calibrators specifications 15
- Frequency source 726 15
- Millivolt measurement and source 724 and 725 15
- Temperature thermocouples 724 and 725 15
- 725 726 16
- Temperature thermocouples 726 16
- Calibrators specifications 17
- Temperature rtd ranges and accuracies 724 and 725 17
- 725 726 18
- Rtd accuracy read and source its 90 726 18
- Calibrators specifications 19
- Loop power supply 19
- Maximum current 22 ma 19
- Pressure measurement 725 and 726 19
- Pressure units availability 725 19
- Pulse read and pulse source 726 19
- Short circuit protected 19
- Voltage 24 v 19
- 725 726 20
- Cleaning the calibrator 20
- Do not use aromatic hydrocarbons chlorinated solvents or methanol based fluids when cleaning the calibrator to avoid damaging the case never apply solvents to the calibrator 20
- General specifications 20
- If the calibrator requires cleaning wipe it down with a cloth that is lightly dampened with water or a mild detergent 20
- Warning to avoid electric shock or damage to the calibrator never allow water inside the calibrator s case 20
- Replacing the batteries 21
- Remote control interface 725 and 726 23
- 725 726 24
- Calibrators remote control interface 725 and 726 25
- 725 726 26
- Calibration manual 26
- Command response actions command arguments comment ch 1 ch 2 26
- Serial command list 726 26
- Table 5 lists the serial commands for the 726 and 725 calibrator with v3 0 and higher firmware refer to remote control interface 725 and 726 for activation steps 26
- Table 5 serial command list 726 and 725 v3 0 and later 26
- Upper_meas 26
- Calibrators serial command list 726 27
- Command response actions command arguments comment ch 1 ch 2 27
- Freq_unit 27
- Table 5 serial command list 726 and 725 v3 0 and later cont 27
- 725 726 28
- Calibration manual 28
- Command response actions command arguments comment ch 1 ch 2 28
- Freq_level 28
- Lower_meas 28
- Pulse_freq 28
- Table 5 serial command list 726 and 725 v3 0 and later cont 28
- Trig 726 only 28
- V_range 28
- Calibrators serial command list 726 29
- Cjc_state 29
- Command response actions command arguments comment ch 1 ch 2 29
- Cprt_max_t 726 only 29
- Cprt_min_t 726 only 29
- Cprt_r0 726 only 29
- Rtd_type 29
- Table 5 serial command list 726 and 725 v3 0 and later cont 29
- Tc_type 29
- Tsens_type 29
- 725 726 30
- 726 only 30
- Calibration manual 30
- Command response actions command arguments comment ch 1 ch 2 30
- Cprt_coefa 726 only 30
- Cprt_coefb 726 only 30
- Cprt_coefc 726 only 30
- Cprt_max_t 726 only 30
- Cust1_alias 726 only 30
- Cust2_alias 726 only 30
- Cust3_alias1 30
- Rtd_wire 30
- Table 5 serial command list 726 and 725 v3 0 and later cont 30
- Temp_unit 30
- Cal_start 31
- Calibrators serial command list 726 31
- Command response actions command arguments comment ch 1 ch 2 31
- Cust3_alias 726 only 31
- Error codes 31
- Hart_off 31
- Hart_on 31
- Table 5 serial command list 726 and 725 v3 0 and later cont 31
- 725 726 32
- Equipment and software required to perform the procedures in this manual are identified in table 6 if the recommended equipment model is not available other equipment can be substituted if it meets the specifications indicated 32
- Required equipment 32
- Warning to avoid safety hazards and equipment damage during the calibration procedures use the specified calibration equipment listed in table 6 using unspecified equipment can give unreliable results and pose safety hazards 32
- Performance tests 33
- Preparing for the performance tests 33
- Upper display voltage measurement tests 34
- Lower display mv tc measurement tests 35
- Lower display voltage measurement tests 36
- Upper display ma measurement tests 37
- Lower display ma measurement tests 725 and 726 38
- Lower display frequency measurement test 725 and 726 39
- Lower display frequency source test 725 and 726 40
- Calibrators performance tests 41
- Lower display 4 wire resistance measurement tests 41
- Press on the uut on 726 until ω appears on the lower display if necessary use to get to the measure mode and use to get to the 4w mode measure should also appear on the lower display 41
- Press stby on the 5520a 41
- Set the 5520a to 2 wire output with 2 wire compensation off then make the connections shown in figure 8 41
- Set the 5520a to source the resistance values in table 12 and verify that the uut resistance readings are within the limits shown 41
- Lower display 3 wire rtd measurement 42
- Lower display thermocouple measurement tests 43
- Lower display thermocouple source test 44
- Lower display ma source tests 725 and 726 45
- Lower display mv source tests 46
- Lower display voltage source tests 46
- Calibrators performance tests 47
- Lower display ohms source tests 47
- Make the connections shown in figure 12 47
- Press on the 726 on the uut until ω appears on the lower display if necessary press until source appears on the lower display 47
- Set the fluke 8508a to 2 k range with loi off for 72x resistance 400 ω to 20 k ω with loi off range for 400 ω or more 47
- Set the fluke 8508a to measure 4 wire resistance 47
- The performance tests for the 724 are now complete disconnect and secure all test equipment 47
- Use the arrow keys on the uut to set the uut output to the resistance values in table 18 and verify that the fluke 8508a readings are within the limits shown 47
- Calibration adjustment 48
- Pressure module input 725 726 48
- 725 726 50
- Calibration manual 50
- Calibration menu 50
- Initiating communication 724 and 725 with v2 xx and lower firmware 50
- Starting with the uut off push and hold while turning the uut on continue to hold until cal mode is displayed enter password appears on the display of all calibrators that have firmware version v1 1 or higher a password has been added to prevent users from accidentally changing the calibration of the calibrator the password for all 724 calibrators is 427 the password for all 725 calibrators is 527 50
- The calibration menus as seen on the pc screen are as follows 50
- Cal volts input 51
- Calibration adjustment procedures 724 and 725 with v2 xx and lower firmware 51
- Cal volts output 52
- Cal ma input fluke 725 only 53
- Cal ma output 725 only 54
- Cal mv input 55
- Cal mv output 56
- Cal thermocouples 57
- Cal ohms hi source 58
- Cal ohms low source 59
- Cal rtd low range 60
- Cal rtd hi range 61
- Cal iso volts 62
- Cal iso ma 63
- Calibration adjustment procedures 726 and 724 725 with v3 0 and higher 64
- Initiating communication 64
- Calibration menu 65
- Calibration menu 725 calibration menu 65
- Calibrators calibration adjustment 65
- Calibrating isolated ma input 66
- Calibrating isolated voltage input 67
- Calibrating ma input fluke 725 and 726 only 68
- Calibrating ma output fluke 725 and 726 only 69
- Calibrating voltage input 70
- Calibrating voltage output 71
- Calibrating low ohms source 72
- Calibrating high ohms source 73
- Calibrating ohms measure 74
- Calibrating thermocouple mv output 75
- Calibrating thermocouple mv input 76
- Calibrating thermocouple cjc 77
- 725 726 78
- Replaceable parts 78
- When servicing this calibrator use only the replacement parts specified user replaceable parts are listed in table 19 and shown in figure 36 78
- Calibrators replaceable parts 79
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