Vaisala HUMICAP HMP41 User's Guide Page 78
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- Table of contents
- TROUBLESHOOTING
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User's Guide ______________________________________________________________________
76 __________________________________________________________________ M211280EN-A
Solving Typical Problems
You can check the error message via the serial interface by using the
ERRS command; see section Error Codes on page 75. In case of
constant error, please contact Vaisala technical support.
Table 8 Troubleshooting Table
Problem or Message Likely Causes and Solutions
Measurement not working, any of
the following errors is active:
- Probe RH measurement error
- Probe T measurement error
- Sensor(s) damaged or missing. Open the
probe filter and check.
- Calibration is not done. Calibrate the probe.
- Check the supply voltage of the transmitter.
Transmitter cannot communicate
with the probe, any of the
following errors is active:
- Probe communication error
- Probe checksum error
- Probe message form error
- Measurements not available
- Check the attachment of the probe to the
transmitter.
- In case of remote probe, check also the
interconnection cables.
- Replace the probe if necessary.
Serial line command not working,
outputs "Unknown command."
- Mistyped or unknown command, check the
command syntax and parameters.
Cannot connect to serial line,
current serial settings of the
module are unknown.
Perform the following steps to connect:
1. Set your terminal settings to 19200 8 N 1
(the default settings of the transmitter).
2. Connect to the service port of the
transmitter.
2. Power up the transmitter, and type "Z" on
the serial line at least five times.
4. The transmitter will come online with the
default settings.
5. Use the
SERI command to set the desired
serial settings, and use the
SAVE
command to save them.
Any of the following errors is
active:
- Current settings checksum error
- Default settings checksum error
Internal error. Perform the following steps:
1. Reset or power cycle the module. Check if
the error disappears.
2. Return the module to factory settings using
the
FRESTORE command. Check again.
3. If the error is still active, contact a Vaisala
service center.
Any of the following errors is
active:
- Program checksum error
- Factory flash defaults checksum
error
- Factory flash not initialized
- Oscillator fault bit active
Faulty transmitter, contact a Vaisala service
center.
Any of the following errors is
active:
- Analog output quantity invalid
- Display quantity invalid
In case of "Analog output quantity invalid"
error select the correct output quantities (set
with the
CALCS command) with ASEL
command and in case of "Display quantity
invalid" error select the correct display
quantities with
DSEL command.
- USER'S GUIDE 1
- Table of Contents 3
- CHAPTER 4 4
- CHAPTER 5 5
- CHAPTER 6 5
- CHAPTER 7 5
- APPENDIX A 6
- List of Figures 7
- List of Tables 8
- GENERAL INFORMATION 9
- Version Information 10
- Related Manuals 10
- Documentation Conventions 10
- ESD Protection 11
- Recycling 11
- License Agreement 12
- Regulatory Compliances 12
- Patent Notice 12
- Trademarks 12
- Warranty 13
- PRODUCT OVERVIEW 15
- Accessories 16
- Optional Display 16
- Interchangeable Probe 16
- Constant Output Probe 17
- Transmitter Components 18
- INSTALLATION 19
- 1011-161 20
- 0505-248 21
- Duct Installation Kit 22
- 0505-177 23
- 0505-178 23
- Probe Mounting Flange 24
- Probe Mounting Clamp 25
- Connections 26
- 10 ... 35 VDC 27
- RS-485 Bus Termination 28
- OPERATION 29
- Property Value 30
- 0807-004 31
- List of Serial Commands 32
- Show Device Information 33
- Set/Show Calibration Date 34
- Show Analog Output Status 35
- Serial Line Output Commands 36
- Stop Continuous Outputting 37
- Set/Show Output Interval 37
- Output a Reading Once 37
- Calibration Commands 38
- Calibrate Analog Output 40
- Set/Show Terminal Echo 41
- Configuring Analog Output 43
- Scaling 44
- Examples: 45
- Configuring Relay Output 46
- Show Relay Settings 47
- Other Commands 48
- Set/Show Output Formatting 49
- Display Command List 50
- Display Active Errors 50
- Save Changed Settings 50
- Restore Saved Settings 51
- Reset Transmitter 51
- Restore Factory Settings 51
- Set/Show Output Unit 52
- Networking Commands 52
- >sdelay 100 53
- Turnaround time : 100 53
- >CLOSE 55
- MAINTENANCE 57
- Fixed Probe Model 58
- Remote Probe Model 59
- Calibration and Adjustment 60
- Adjustment with HM70 64
- Reference Probe 65
- 0505-185 66
- 0505-186 66
- LiCl-NaCl Adjustment 67
- Calibrated Reference Probe 68
- Adjustment with HMI41 69
- Offset and Gain Adjustments 71
- HOLD again 72
- ENTER to conclude the 72
- MODE. The following display 73
- Troubleshooting 74
- Analog Output Tests 75
- TROUBLESHOOTING 77
- Solving Typical Problems 78
- Technical Support 79
- TECHNICAL DATA 81
- Table 12 Inputs and Outputs 82
- Options and Accessories 83
- Transmitter Dimensions 84
- 1011-159 85
- CALCULATION FORMULAS 87
- Dew/frostpoint Temperature 88
- Mixing Ratio 89
- Absolute Humidity 89
- Enthalpy 89
- Saturation Vapor Pressure 90
- Water Vapor Pressure 91
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