Rki-instruments Digester Gas Monitor Uživatelský manuál Strana 41
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Digester Gas Monitor Operator’s Manual Overview • 35
Chapter 4: Operation
Overview
This chapter describes the Digester Gas Monitor in normal operation. This chapter also
describes the Digester Gas Monitor in alarm 1, alarm 2, alarm 3, and fail conditions, and
suggests responses to these conditions.
Normal Operation
Normal operation is defined as follows:
• the start-up procedure is complete.
• the Digester Gas Monitor is not indicating an alarm 1, alarm 2, alarm 3, or fail
condition.
• the Digester Gas Monitor is not running in one of the selection menus or Calibration
Mode.
During normal operation, the Digester Gas Monitor will perform a detection cycle as often
as the sample interval dictates. In between detection cycles, the Digester Gas Monitor is in
Standby Mode and the display will alternate between the last recorded gas reading for all
active channels and the time left until the next detection cycle occurs. The example below
illustrates a typical Digester Gas Monitor channel allocation.
The PILOT LED is on indicating that the Digester Gas Monitor is receiving incoming
power.
Detection Cycle
The Digester Gas Monitor performs a detection cycle as often as the Cycle Interval Time
parameter in the Global Menu dictates. During a detection cycle, the Digester Gas Monitor
locks out the ability to enter other operational modes or menus, such as Calibration Mode.
The Digester Gas Monitor must be in Standby Mode in order to enter other operational
modes or menus.
A detection cycle can be manually started at any time while the Digester Gas Monitor is in
Standby Mode by pressing and holding the ENTER button for 5 seconds. Forcing a
detection cycle does not reset the time left until another scheduled detection cycle begins.
The next scheduled detection cycle happens on schedule.
Standby Mode
# of Samples 0
Next Detection Cycle
in 0D: 0H: 59M: 59S
1: METHANE 0 %VOL
2: OXYGEN 20.9 %VOL
3: CO2 0.0 %VOL
4: H2S 0 ppm
- Digester Gas Monitor 1
- Operator’s Manual 1
- Product Warranty 3
- Table of Contents 4
- Chapter 1: Introduction 7
- ~ Vac (AC voltage) 8
- Specifications 9
- Chapter 2: Description 11
- Inlet and Exhaust Fittings 12
- Internal Description 14
- Display PCB 16
- Main PCB 18
- Termination Jumper 20
- Flowmeters 22
- Hydrophobic Filter 23
- Water Trap 23
- Solenoid Valves 23
- Check Valves 23
- Factory Wiring 24
- Optional Horn/Strobe 25
- Overview 28
- See Modbus W iring 30
- In C hapter9 30
- AC In Terminal Strip 31
- 24V BATT 32
- Connecting Recorders 33
- Making Fitting Connections 34
- Hose Barb Connections 37
- Chapter 4: Operation 41
- Battery Charging (Optional) 45
- Alarm Indications 45
- Alarm 1 Condition 47
- Alarm 2 Condition 48
- Alarm 3 Condition 49
- Fail Condition 50
- Flow Fail Condition 50
- Low DC Power Condition 51
- Chapter 5: Global Menu 53
- Chapter 6: Configuration Menu 57
- Do You Want To 59
- Do More Channels? 59
- Chapter 7: Input Setup Menu 63
- CHANNEL(S): 1 65
- %LEL 65
- UP / DN then ENT / ESC 65
- Chapter 8: Calibration Mode 67
- Entering Calibration Mode 68
- Calibration Timeout Setting 68
- Performing a Calibration 69
- Viewing Maximum Spans 72
- Modbus System 74
- Recommended Modbus Wiring 75
- 4-wire Modbus System 76
- Modbus Menu 76
- Supported Modbus Functions 78
- Register 40048 83
- Registers 40049 - 40052 83
- Registers 40053 - 40055 83
- Registers 40056 - 40057 83
- Chapter 10: Maintenance 84
- Troubleshooting 85
- Sensor Replacement 88
- Replacing the Oxygen Sensor 89
- Replacing the H 89
- S Sensor 89
- Replacing the Air Filter 90
- Replacing the Oil Mist Filter 92
- Filter with Fittings Detached 93
- Filter with Fittings Attached 93
- Replacing the AC Fuses 94
- Part No. Description 95
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