Inficon T-Guard Leak Detection Sensor Bedienungsanleitung Seite 46
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44 Operation
jina85e 5.fm Technical Handbook(1112)
Accumulation Measurement
In Accumulation mode, the T-Guard™ Leak Detection Sensor starts with the G
ROSS
leak test. If, at the beginning of the test, the helium concentration in the chamber is
much higher (approx. 1000 ppm) than in the environment, the test sample has a
gross leak.
In this case, the T-Guard™ stops the measurement cycle and displays a leak rate of
a hundred times the highest trigger value.
If the test sample passes the GROSS -leak test, the T-Guard™ Leak Detection
Sensor takes an air sample from the chamber and measures it in F
INE-mode.
If, during this first
FINE measurement, the T-Guard™ detects that the helium concen-
tration rises too fast, it will stop the measurement and report a leakage rate of five
times the highest trigger level.
After the first
FINE-measurement, it will wait for a certain time. Then, the second
GROSS measurement will be carried out to check if the test sample has exploded.
After that, it takes the next air sample in FINE-mode. From the difference of the two
F
INE-measurements, the T-Guard™ Leak Detection Sensor calculates the leak rate.
Fig. 6-7 Typical helium concentration in an enclosed chamber with a leaky test
sample over time. Due to ambient helium, the helium level is never zero.
The helium level rises linearly with time. The T-Guard™ Leak Detection
Sensor measures the helium concentration in the chamber four times.
Item Description Item Description
1 Helium concentration 7 Accumulation time
2 Start 8 Second gross measurement
3 Ambient helium 9 Second fine measurement
4 Time 10 Wait time purge
5 First gross measurement 11 Purge time
6 First fine measurement 12 Measuring time
- T-Guard™ 1
- 1 Operating instructions 4 3
- 2 Safety 7 3
- 3 Description 9 3
- 4 Installation 29 3
- 2 Content 4
- 5 Operation 39 4
- 6 Maintenance 66 4
- 7 Product Handling 71 4
- 8 Technical Data 72 4
- 9 Errors and Warnings 74 5
- 1 Operating instructions 6
- 1.3 Graphic conventions 7
- 1.4 Glossary 7
- 6 Operating instructions 8
- 2 Safety 9
- 8 Safety 10
- 3 Description 11
- 3.2 Interfaces 12
- Description 11 13
- 12 Description 14
- 3.3 Vacuum diagram 15
- 14 Description 16
- TANDBY mode 17
- 16 Description 18
- 18 Description 20
- 3.4 Wise Technology™ Sensor 21
- 3.5 Accessories 22
- SC-button) 23
- 22 Description 24
- 3.5.2 19" control unit 25
- 3.5.4 Connector set 26
- 3.5.5 Fore Pump 26
- 3.5.6 2m line 27
- 3.5.7 I•Stick 27
- 3.6 Scope of delivery 28
- 3.7 Ordering Information 29
- 28 Description 30
- 4 Installation 31
- 4.3 Choosing a Fore Pump 32
- 4.4 Installing Electrically 33
- 4.6 Connecting a PLC 34
- Installation 33 35
- 34 Installation 36
- Installation 35 37
- 36 Installation 38
- Installation 37 39
- 4.7 Connecting a PC 40
- 5 Operation 41
- 40 Operation 42
- 5.2 Calibrating 43
- 5.2.2 Start Calibration 44
- 5.3 Measuring 45
- 44 Operation 46
- Operation 45 47
- 5.3.2 Carrier Gas Mode 48
- Operation 47 49
- 1 Helium signal 4 Time 49
- 2 Start 5 Rising signal 49
- 48 Operation 50
- 5.3.3 Continuous Mode 51
- 5.3.4 Switching Off 52
- 5.3.5 Standby 52
- 5.3.6 Helium contamination 52
- 5.4 Controlling via PLC 53
- 5.5 Controlling via RS-232 53
- 52 Operation 54
- Operation 53 55
- 5.8 Settings 56
- Menu Structure T-Guard™ 57
- 56 Operation 58
- Operation 57 59
- 58 Operation 60
- Operation 59 61
- 60 Operation 62
- Operation 61 63
- 62 Operation 64
- Operation 63 65
- 64 Operation 66
- Operation 65 67
- 6 Maintenance 68
- 6.2 Replacing Hoses 69
- 68 Maintenance 70
- Remove 4 screws from the top 71
- 70 Maintenance 72
- 7 Product Handling 73
- 8 Technical Data 74
- 8.4 Environmental Conditions 75
- 9 Errors and Warnings 76
- 76 Errors and Warnings 78
- 10 Service Centers World Wide 80
- Service Centers World Wide 79 81
- 10.1 Ordering Information 82
- Service Centers World Wide 81 83
- Dokument: jina85e1-f (1112) 85
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