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Met One
1600 Washington Blvd.
Grants Pass, Oregon 97526
Telephone 541-471-7111
Facsimile 541-471-7116
Page 2
M
ODEL
R
ELATIVE
EMPERATURE
M
ANUAL
Instruments, Inc
085
H
UMIDITY
S
ENSOR
Regional Service
3206 Main St. Suite 106
Rowlett, Texas 75088
Telephone 972-412-4715
Facsimile 972-412-4716
/
085-9800 Manual Rev A.doc
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Summary of Contents for Met One Instruments 085
- Page 1 ELATIVE UMIDITY EMPERATURE ENSOR ANUAL Met One Regional Service Instruments, Inc 3206 Main St. Suite 106 1600 Washington Blvd. Rowlett, Texas 75088 Grants Pass, Oregon 97526 Telephone 972-412-4715 Telephone 541-471-7111 Facsimile 972-412-4716 Facsimile 541-471-7116 Page 2 085-9800 Manual Rev A.doc...
- Page 2 Copyright Notice Model 085 Relative Humidity / Temperature Sensor Manual. © Copyright 2018 Met One Instruments, Inc. All Rights Reserved Worldwide. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any other language in any form by any means without the express written permission of Met One Instruments, Inc.
- Page 3 One Instruments, Inc. be replaced or repaired and return freight prepaid. In no case shall the liability of Met One Instruments, Inc. exceed the purchase price of the product. This warranty may not apply to products that have been subject to misuse, negligence, accident, acts of nature or that have or modified other than by Met One Instruments, Inc.
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Page 4: Table Of Contents
Temperature to Resistance Table (Fahrenheit) ..............14 4.5. Temperature Sensor Data Logger Connection ................ 16 4.6. General Maintenance Schedule ....................17 4.7. 085 Relative Humidity Sensor Maintenance and Calibration ........... 17 4.8. Sensor Maintenance ........................ 17 4.8.1. Sensor Element ......................... 17 4.8.2. -
Page 5: General Information
GENERAL INFORMATION 1.1. Description The 085 sensor is an extremely accurate microprocessor controlled relative humidity and temperature sensor. The relative humidity sensor responds to the full range of 0 to 100% humidity. Response is linear with negligible hysteresis or temperature dependence. - Page 6 Figure 2 Model 085-6 Sensor 085-9800 Manual Rev A.doc Page 7...
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Page 7: 085 Options
1.2. 085 Options The 085 options are defined by dash numbers as follows: 085-(Shield Option) 1.2.1. Radiation Shield Compatibility Option: 6 = Use with Model 076B or 077 radiation shield. This sensor comes with 8-inch long pigtail wires for connection to the radiation shield junction box. Refer to the radiation shield manual for sensor and cable connections. -
Page 8: Installation
Sensors not installed in a radiation shield should be mounted in a representative location having good airflow and shaded from sunlight or other heat radiation sources that would affect measurement of relative humidity or temperature. 3.1. Mounting Instructions Figure 2 Radiation Shield Installation 085-9800 Manual Rev A.doc Page 9... -
Page 9: Wiring Instructions
Pin D Black Temperature Common Pin E Temperature Signal Pin F No Connection No Connection No Connection White/Brown Shield Figure 3 Electrical Connector View looking at connector pins. (Pins are also identified on connector). Page 10 085-9800 Manual Rev A.doc... -
Page 10: Operational Check-Out And Calibration
The sensor’s relative humidity output is referenced to saturated water vapor pressure above liquid water. When the air temperature is below freezing, the sensor’s maximum theoretical measurement range is limited as follows: Air Temperature Maximum RH (Deg C) 085-9800 Manual Rev A.doc Page 11... -
Page 11: Temperature Sensor
085 sensor and a standard temperature sensor (NIST thermometer or RTD). The mass can be used in air, or can be partially submerged in ice or an ice bath. The 085 sensor should not be submerged. Reference... -
Page 12: Temperature Table
4.4. Temperature Table 4.4.1. Temperature to Resistance Table (Celcius) Model 085-X Temperature vs. Sensor Resistance TEMP DEG C RCAL TEMP DEG C RCAL 110236 26155 104464 25436 99187 24739 94344 24064 89882 23409 85760 22775 81939 22159 78388 21561 75079... -
Page 13: Temperature To Resistance Table (Fahrenheit)
4.4.2. Temperature to Resistance Table (Fahrenheit) Model 085-X Temperature vs. Sensor Resistance TEMP DEG F RCAL TEMP DEG F RCAL 110236 34319 106964 33757 103855 33207 100895 32669 98075 32141 95385 31625 92816 31119 90361 30622 88011 30136 85760 29659... - Page 14 Model 085-X Temperature vs. Sensor Resistance TEMP DEG F RCAL TEMP DEG F RCAL 14670 11061 14447 10883 14227 10707 14009 10534 13794 10362 13583 10193 13374 10025 13167 9859 12963 9696 12762 9534 12564 9374 21368 9215 12174 9059...
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Page 15: Temperature Sensor Data Logger Connection
0.1% resistor (Met One Instruments part number 805020) is connected in series with excitation voltage. This resistor is provided as part of all Met One Instruments translators designed for use with this sensor and is included with Met One Instruments data loggers configured for this sensor. For applications with other equipment, contact Met One Instruments to obtain this special resistor. -
Page 16: General Maintenance Schedule
4.8.1. Sensor Element The RH sensor element is not user-replaceable (replacement requires sensor recalibration). If the element becomes damaged, please send the 085 sensor to Met One Instruments for repair. Please obtain shipping instructions and a return authorization (RA) number before returning any unit. -
Page 17: Spare Parts
4.8.2. Spare Parts 560014 820202 Thermistor 720050 Figure 5 Spare Parts 820202 RH SENSOR ELEMENT (Requires factory calibration) 560014 FILTER, MEMBRANE 720050 O-RING (Two required) Page 18 085-9800 Manual Rev A.doc... -
Page 18: Operational Specifications
-30° C to +50° C (-22° F to 122° F) Accuracy ±0.15° C (0.27° F) Output: Resistive AutoMet Auto ID: General Input Power 10 to 18 VDC @ < 5 mA Dimensions Length: 8.5 in (21.59 cm) Diameter: 0.75 in (1.91 cm) 085-9800 Manual Rev A.doc Page 19...
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