Vaisala HMT120 User Manual download pdf (Page 49)

Chapter 5 _______________________________________________________________ Maintenance

VAISALA ________________________________________________________________________ 47

CHAPTER 5

MAINTENANCE

This chapter provides information that is needed in basic maintenance of

HMT120.

Replacing the HUMICAP

Sensor

Fixed and Remote Probe Models

1. Remove the filter (plastic grid or sintered stainless steel).

2. Remove the damaged sensor and insert a new one.

3. Recalibrate the probe.

4. Replace a dirty filter to ensure a maximum lifetime and a fast

response for the sensor. Do not attempt to clean the filter.

1 2 ... 44 45 46 47 48 49 50 51 52 53 54 ... 86 87

USER'S GUIDE 1
Table of Contents 3
CHAPTER 5 4
CHAPTER 6 5
CHAPTER 7 5
APPENDIX A 5
List of Figures 6
List of Tables 6
GENERAL INFORMATION 7
Version Information 8
Related Manuals 8
Documentation Conventions 8
Recycling 9
Regulatory Compliances 10
Patent Notice 10
Trademarks 10
License Agreement 10
Warranty 10
PRODUCT OVERVIEW 11
Interchangeable Probe 12
Accessories 12
Optional Display 12
Constant Output Probe 13
Transmitter Components 14
INSTALLATION 15
Mounting 16
1011-150 17
1303-034 18
Duct Installation Kit 19
0505-177 20
0505-178 20
Probe Mounting Flange 21
Probe Mounting Clamp 22
Connections 23
1011-152 24
SERVICE PORT 25
0807-004 27
List of Serial Commands 28
Show Device Information 29
Set/Show Calibration Date 30
Show Analog Output Status 32
Serial Line Output Commands 33
Stop Continuous Outputting 34
Set/show Output Interval 34
Output a Reading Once 34
Calibration Commands 35
Calibrate Analog Output 37
Set/Show Terminal Echo 38
Configuring Analog Output 40
Examples: 41
Test Analog Outputs 42
Other Commands 43
Set/show Output Formatting 44
Display Command List 45
Display Active Errors 45
Save Changed Settings 45
Restore Saved Settings 46
Reset Transmitter 46
Restore Factory Settings 46
Set/show Output Unit 47
MAINTENANCE 49
Fixed Probe Model 50
Remote Probe Model 51
Calibration and Adjustment 52
Adjustment with HM70 56
Reference Probe 57
0505-185 58
0505-186 58
LiCl-NaCl Adjustment 59
Calibrated Reference Probe 60
Adjustment with HMI41 61
Offset and Gain Adjustments 63
MODE. The following display 65
Troubleshooting 66
Analog Output Tests 67
TROUBLESHOOTING 69
Solving Typical Problems 70
Technical Support 71
TECHNICAL DATA 73
Table 12 Inputs and Outputs 74
Options and Accessories 75
Transmitter Dimensions 76
1011-159 77
CALCULATION FORMULAS 79
Dewpoint Temperature 80
Dew/frostpoint Temperature 80
Mixing Ratio 81
Absolute Humidity 81
Enthalpy 81
Saturation Vapor Pressure 82
Water Vapor Pressure 83
*M211244EN* 87

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Vaisala HMT120 User Manual Page 49

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