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787B
Руководство по калибровке Страница: 4

Fluke 787B Руководство по калибровке онлайн [4/44] 365597

Fluke 789 Руководство по калибровке онлайн [4/44] 365596

789/787B

Calibration Manual

How to Restore the Default Password ...................................................... 35

Meter Keys Used in the Calibration Steps ................................................ 36

Calibration Adjustment .............................................................................. 36

Replacement Parts and Accessories ................................................................. 38

Содержание

787b calibration manual 1
Calibration manual 1
Processmeter 1
Warranty 2
Table of contents 3
Title page 3
How to contact fluke 5
Introduction 5
Safety information 6
Ac volts measurement 9
All specifications apply from 18 c to 28 c unless stated otherwise 9
All specifications assume a 5 minute warm up period 9
Counts refers to the number of increments or decrements of the least significant digit 9
Dc millivolts measurement 9
Dc volts measurement 9
Processmeter 9
Specifications 9
The standard specification interval is 1 year 9
Ac current measurement 10
Dc current measurement 10
Frequency counter accuracy 10
Ohms measurement 10
Approximate trigger level 5 of full scale 11
Frequency counter sensitivity 11
Hz to 5 khz 11
Input range 11
Minimum sensitivity rms sinewave 11
Mv 150 mv 50 hz to 5 khz 150 mv 11
Processmeter 11
Specifications 11
Usable 0 hz to 20 khz with reduced sensitivity 1 11
V 1 v 1 v 11
V 4 v 4 v 11
V 40 v 40 v 11
V 400 v 400 v 11
Vhz max 11
Calibration manual 12
General specifications 12
Equipment and software required to perform the procedures in this manual are identified in table 2 13
If the recommended equipment model is not available in some cases other equipment can be substituted as long as it meets the specifications indicated 13
If you are using a different calibrator or dmm make the connections appropriate for that instrument 13
Processmeter 13
Required equipment 13
To avoid safety hazards and equipment damage during the calibration procedure use the specified calibration equipment listed in table 2 using unspecified equipment can jeopardize the calibration verification test and pose safety hazards 13
Unless otherwise indicated all connection diagrams for the calibration verification tests in this manual showing a calibrator or digital multimeter use a fluke 5522a calibrator fluke 8508a reference multimeter keysight 3458a dmm or equivalent 13
Warning 13
Basic maintenance 14
Battery replacement 14
How to clean 14
Battery life 15
Check and replace fuses 16
Performance verification 16
Preparation 17
Loop power test 789 only 18
Current sourcing test 19
Position 19
Current measurement test 20
Apply 2 v dc from the calibrator 21
Connect the calibrator to the com and 21
Connect the current terminals of the multimeter to the com and 21
Diode function test 21
Figure 5 21
Performance verification 21
Position 21
Press j blue to select diode test 21
Processmeter 21
Put the calibrator in standby stby mode 21
Put the calibrator in standby stby mode then disconnect the calibrator from the 21
Put the multimeter in the dc ma autorange function 21
Terminals on the 21
Terminals on the uut as shown in 21
The multimeter should read close to 0 ma there is no tolerance specification for this current this test just makes sure that the diode test current source is operating 21
The uut should read between 1 59 v and 2 41 v 21
Turn the uut rotary switch in the 21
Adm007f eps 22
Calibration manual 22
Figure 5 diode test connections 22
Continuity function test 23
Resistance measurement test 24
Performance verification 25
Processmeter 25
Apply the values from the calibrator shown in table 9 and compare the readings on 26
Connect the calibrator to the com and 26
Dc millivolts measurement test 26
Figure 8 26
Position 26
Put the calibrator in standby stby mode 26
Put the uut rotary switch in the 26
Terminals on the uut as shown in 26
The uut to the acceptable readings shown 26
Dc volts measurement tests 27
Ac volts measurement test 28
Always place the calibrator in the standby stby mode between tests and before handling the test connections or test cables 28
Apply the values from the calibrator shown in table 11 and compare the readings on 28
Connect the calibrator to the com and 28
Figure 9 28
Put the calibrator in standby stby mode 28
Put the uut rotary switch in the s position 28
Some of the calibration verification tests involve the use of high voltages and should be performed by qualified personnel only 28
Terminals on the uut as shown in 28
The uut to the acceptable readings shown 28
To prevent possible electrical shock fire or personal injury 28
Warning 28
Frequency measurement test 29
Calibration adjustment 30
Preparation 30
Ac voltage adjustment 31
Procedure for models with firmware version 2 31
Frequency adjustment 32
Dc millivolts adjustment 33
Dc voltage adjustment 33
Diode adjustment 34
Ohms adjustment 34
Amps dc adjustment 35
Milliamps dc adjustment 35
Amps ac adjustment 36
Milliamps output adjustment 36
Calibration adjustment counter 37
Calibration adjustment password 37
How to change the password 37
Procedure for models with firmware version 2 37
Static awarenes 38
Apply 6 v across the battery pads xbt1 and on the back of the pca see 39
Beep if the beeper is enabled the default password is now restored 39
C62 c69 39
C66 c86 39
Calibration adjustment 39
Figure 10 39
Figure 12 restoring the default password 39
Firmware version 2 39
How to restore the default password 39
If the calibration password is forgotten the default password can be restored with these steps 39
Processmeter 39
R104 r107 c95 39
R105 r116 39
R110 c98 39
R87 r90 39
Remove the 6 v supply and install the shield and back case on the uut 39
Remove the back case from the uut 39
Remove the shield and leave the pca in the top case 39
Short across the keypad on the back of the pca see figure 10 the uut should 39
To avoid electrical shock or personal injury remove the test leads and any input signal before removing the back case from the uut 39
Tp14 tp17 39
Tp26 c64 39
Turn the rotary switch from off to b 39
Warning 39
Calibration adjustment 40
Meter keys used in the calibration steps 40
Calibration adjustment 41
Caution 41
Processmeter 41
Remove 1 a from uut promptly after storing calibration constant fuse will blow after 30 seconds 41
Set the calibrator to standby prior to changing the function switch position and or after completing adjustment of each function if the calibration adjustment procedure is not completed correctly the uut will not operate correctly 41
Calibration manual 42
Figure 13 replacement parts 42
Replacement parts and accessories 42
Replacement parts and some accessories are shown in figure 13 and listed in table 14 many more dmm accessories are available from fluke for a catalog contact the nearest fluke distributor 42
To find out how to order parts or accessories use the telephone numbers or addresses shown in contacting fluke 42
To prevent possible electrical shock fire or personal injury use only 42
Use only specified replacement fuses 42
Use only specified replacement parts 42
Warning 42
Processmeter 43
Replacement parts and accessories 43

Fluke 787B Руководство по калибровке онлайн [4/44] 365597

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