Met One Instruments 083E Manuale utente
083E-9800 Rev C
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083E-9800 Rev C
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Copyright Notice
Model 083E Relative Humidity / Temperature Sensor Manual.
© Copyright 2016 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.
Technical Support
Should you require support, please consult your printed documentation or our website
www.metone.com to resolve your problem. If you are still experiencing difficulty, you
may contact a Technical Service representative during normal business hours;
Monday –Friday 7:00 a.m. to 4:00 p.m. Pacific Time.
Voice: (541) 471-7111
Fax: (541) 471-7116
E-Mail: service@metone.com
Mail: Technical Services Department
Met One Instruments, Inc.
1600 NW Washington Blvd.
Grants Pass, OR 97526
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Safety Notice
The contents of this manual have been checked against the hardware and software
described herein. Since deviations cannot be prevented entirely, we cannot guarantee
full agreement. However, the data in this manual is reviewed regularly and any
necessary corrections included in subsequent editions.
Faultless and safe operation of the product presupposes proper transportation, storage,
and installation as well as careful operation and maintenance. The seller of this
equipment cannot foresee all possible modes of operation in which the user may
attempt to utilize this instrumentation. The user assumes all liability associated with the
use of this instrumentation. The seller further disclaims any responsibility for
consequential damages.
Warranty
Products manufactured by Met One Instruments, Inc. are warranted against defects in
materials and workmanship for a period of (1) year from the date of shipment from the
factory. Offered products not manufactured by Met One Instruments, Inc. will be
warranted to the extent and in the manner warranted by the manufacturer of that
product.
Any product found to be defective during the warranty period will, at the expense of Met
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. Consumable items such as bearings are not covered under this warranty.
Other than the warranty set forth herein, there shall be no other warranties, whether
expressed, implied or statutory, including warranties of fitness or merchantability.
083E-9800 Rev C
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Table of Contents
1. GENERAL INFORMATION..................................................................................... 6
1.1. Description.................................................................................................................................6
1.2. 083E Options.............................................................................................................................8
1.2.1. Temperature Option:...........................................................................................................8
1.2.2. Radiation Shield Compatibility Option:................................................................................8
2. SENSOR SITING.................................................................................................... 8
3. INSTALLATION...................................................................................................... 9
3.1. Mounting Instructions.................................................................................................................9
3.2. Wiring Instructions...................................................................................................................10
4. OPERATIONAL CHECK-OUT AND CALIBRATION............................................ 11
4.1. Relative Humidity Sensor Check-out.......................................................................................11
4.2. Limitations of RH Measurements at Below Freezing Temperatures.......................................11
4.3. Temperature Sensor................................................................................................................12
4.4. Temperature Table..................................................................................................................13
4.5.Temperature Sensor Data Logger Connection........................................................................14
4.6. General Maintenance Schedule ..............................................................................................15
4.7. 083E Relative Humidity Sensor Maintenance and Calibration................................................15
4.8. Sensor Maintenance................................................................................................................15
4.8.1. Sensor Element.................................................................................................................15
4.8.2. Spare Parts .......................................................................................................................16
5. Operational Specifications................................................................................. 17
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1. GENERAL INFORMATION
1.1. Description
The 083E 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. Some models contain a high accuracy linearized temperature sensor.
The temperature sensor is a three-element composite thermistor type with linear
response over the range of –50°C to +50°C. The sensor is designed to be mounted in
a radiation shield when used outdoors. The exact model number you order will
determine the functions of your sensor. The following section describes the model
number feature assignments.
Figure 1 Model 083E-X-35 Sensor
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Figure 2 Model 083E-X-6 Sensor
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1.2. 083E Options
The 083E options are defined by dash numbers as follows:
083E-(Temp Option)-(Shield Option)
1.2.1. Temperature Option:
0 = RH (0 to 100%) only
1 = RH (0 to 100%) & Temperature (–50°C to +50°C)
1.2.2. 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.
35 = Use with Model 073B or 5980 radiation shield. This sensor has a circular
connector for use with Met One Instruments cable PN 2348.
2. SENSOR SITING
The EPA recommends sensor mounting in a radiation shield at a 2 meter height, ideally
over green mowed grass to minimize related terrestrial radiation errors on the
temperature and relative humidity readings. Typical installations may vary significantly
from these recommendations due to geographic limitations or specific monitoring
requirements.
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3. INSTALLATION
If the sensor is to be mounted in a radiation shield, refer to the radiation shield manual
section for mounting details. Typical installations are shown below.
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
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3.2. Wiring Instructions
Sensor
Connection
Wire Color
Description
Pin A
White
+10 to +18 VDC
Pin B
Green
Signal Ground
Pin C
Yellow or Orange
RH Analog Output
Pin D
Black
Temperature Common (Model 083E-1)
No Connection (Model 083E-0)
Pin E
Red
Temperature Signal (Model 083E-1)
No Connection (Model 083E-0)
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).
Indice
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