GasTech D-Guard2 Operator's Manual page 4

Digital gas detector with hart communications
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11.2.
11.2.1
User Menu status ........................................................................................................................... 30
11.3.
11.3.1
Soft-Key Functions and Icons .......................................................................................................... 31
11.3.2
Quick-Nav Function ........................................................................................................................ 32
11.3.3
Entering The Function Screens........................................................................................................ 32
12.
CALIBRATION ........................................................................................................................................ 33
12.1.
? ..................................................................................................................................... 33
12.2.
12.3.
.................................................................................................................................... 34
12.3.1
Auto-Zero Calibration ..................................................................................................................... 34
12.3.2
Saving the Zero Calibration Value .................................................................................................. 35
12.3.3
Manual Zero Calibration ................................................................................................................. 35
12.3.4
Notes On Zero Calibration .............................................................................................................. 35
12.4.
..................................................................................................................................... 35
12.4.1
Auto Span Calibration ..................................................................................................................... 36
12.4.2
Saving Auto-Span Calibration Values ............................................................................................. 37
12.4.3
Manual Span Calibration ................................................................................................................ 37
12.4.4
Performing a Manual Span Calibration .......................................................................................... 37
12.4.5
Saving Manual Span Calibrations ................................................................................................... 37
12.4.6
Isolating the Detector During Span Calibration .............................................................................. 37
12.5.
12.5.1
Setting the 4mA Output Current ..................................................................................................... 38
12.5.2
Setting the 20mA output Current ................................................................................................... 38
12.6.
12.6.1
Running the DRT Checks ................................................................................................................. 39
13.
DETECTOR CONFIGURATION ................................................................................................................. 40
13.1.
13.1.1
Set Guard Band ............................................................................................................................... 40
13.1.2
Set Measurement Full-Scale ........................................................................................................... 41
13.1.3
Detector Type ................................................................................................................................. 41
13.1.4
Setting Span Gas Concentration ..................................................................................................... 42
13.2.
13.2.1
Making Alarm Configuration Changes (Alarm 1 shown) ................................................................ 43
13.2.2
Alarm 1 Trip Level ........................................................................................................................... 43
13.2.3
Alarm 1 Hysteresis .......................................................................................................................... 43
13.2.4
Alarm 1 Trip Direction .................................................................................................................... 44
13.2.5
Alarm 1 Normal State ..................................................................................................................... 44
13.2.6
Alarm 1 Latching ............................................................................................................................ 44
13.2.7
Alarm 2 Current Settings Screen ..................................................................................................... 45
13.3.
13.3.1
HART Setup Main Screen ................................................................................................................ 45
13.3.2
Turning HART Communications On or OFF ..................................................................................... 45
13.3.3
HART Tag data ................................................................................................................................ 46
13.3.4
HART Tag data - fixed loop mode .................................................................................................. 46
13.4.
13.4.1
SYSTEM Setup Main Screen ............................................................................................................ 46
13.4.2
Turning Detector Isolation On or OFF ............................................................................................. 46
13.4.3
Internal Temperature Sensor .......................................................................................................... 47
13.4.4
Display Colour Invert ...................................................................................................................... 47
13.4.5
Sensor Temperature Compensation ............................................................................................... 47
13.4.6
Set Sensor Gain ............................................................................................................................................ 47
13.4.7
Set Menu Passcode ......................................................................................................................... 48
14.
DETECTOR MESSAGES AND WARNING STATES ..................................................................................... 48
14.1.
14.1.1
HART Communications Active ........................................................................................................ 48
............................................................................................................................ 30
....................................................................................................................... 33
.......................................................................................................... 38
..................................................................................................... 39
........................................................................................................................... 40
............................................................................................................................. 42
.................................................................................................................... 45
............................................................................................................................ 46
.............................................................................................. 48
1
....................................................................... 31
2
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