Vaisala DMP248 Manuel de service télécharger pdf (Page 77)

CHAPTER 7____________________________________________________________MAINTENANCE

VAISALA _________________________________________________________________________ 71

CH1+

CH1-

TEST POINTS

CH1+

CH1-

FIGURE 7-4 Circuit diagram of the analogue output current test

points

Adjusting the contrast of the display

The contrast of the display can be adjusted using the trimmer "LCD

display contrast" located next to the press switches.

1 2 ... 72 73 74 75 76 77 78 79 80 81 82 ... 144 145

OPERATING 1
Table of contents 3
GENERAL INFORMATION 7
PRODUCT DESCRIPTION 9
FIGURE 2-2 shows the DRYCAP 11
FIGURE 2-1. Now the RH 11
Use in high pressure 12
INSTALLATION 13
PROBE UP 14
DOWN 14
Mounting; overview 15
FIGURE 3-7 17
R1/2 ISO 7/1 20
VALVE OPEN 21
PRESS TOOL 21
VALVE CLOSED 21
Sample cell 24
SAMPLE CELL 25
Grounding 27
Connections 29
Connection to an AC supply 30
COMMISSIONING 31
FIGURE 4-2 32
RXWSXWVÕ6FDOH 33
Spare jumpers 33
COMMANDS 39
LED commands 40
Display/keypad commands 41
Auto-calibration 42
Forced auto-calibration 44
Analogue output commands 44
FIGURE 4-2) 45
Output via serial bus 46
Output modes 48
Pressure compensation 50
Setting the date 51
Setting the time 51
Serial commands 52
Analogue outputs 55
Output via the serial bus 56
Outputting the reading once 57
Serial bus settings 58
Selecting the output units 58
Resetting the transmitter 59
Setting the serial interface 59
OPEN & CLOSE 59
2 which is in POLL state 60
CALIBRATION 61
Using serial commands 62
Using display/keypad commands 63
Using LED commands 63
Temperature calibration 65
MAINTENANCE 73
Adjustment using LED commands 75
TECHNICAL DATA 79
Temperature 80
Relative humidity 80
Electronics 82
Serial interface modules 82
Electromagnetic compatibility 83
CHAPTER 9 OPTIONS 84
SPARE PARTS AND 85
ACCESSORIES 85
APPENDIX 1 SERIAL COMMANDS 87
Auto-calibration commands 89
Calibration commands 93
: 0.000 94
FTIME Adding time to output 99
FDATE Adding date to output 100
SERI Serial bus settings 101
Operation modes 103
DATE Setting the date 106
TIME Setting the time 107
?? <cr> 108
APPENDIX 2 109
Power supply module 110
Technical specifications 111
APPENDIX 3 113
Installation 114
Operation 114
Network configuration 116
RX GND TX 117
Dual loop operation 118
STOP mode 120
POLL mode 121
Specifications 122
APPENDIX 4 123
Dual loop wiring 129
Current loop settings 131
APPENDIX 5 133
Errors after reset 134
Errors during operation 135
APPENDIX 6 137
APPENDIX 7 139
APPENDIX 8 145

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Vaisala DMP248 Manuel de service Page 77

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