Met One 831 Manuel utilisateur
831-9800 Rev D.doc
Met One Instruments, Inc
1600 Washington Blvd.
Grants Pass, Oregon 97526
Telephone 541-471-7111
Facsimile 541-471-7116
Regional Service
3206 Main St. Suite 106
Rowlett, Texas 75088
Telephone 972-412-4715
Facsimile 972-412-4716
MODEL 831
MANUAL
Model 831 Manual Page 1 831-9800 Rev D.doc
Copyright Notice
Model 831 Manual
© Copyright 2012 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 to resolve your
problem. If you are still experiencing difficulty, you may contact a Technical Service
representative during normal business hours—7:30 a.m. to 4:00 p.m. Pacific Standard
Time, Monday through Friday.
Voice: (541) 471-7111
Fax: (541) 471-7116
Mail: Technical Services Department
Met One Instruments, Inc.
1600 Washington Boulevard
Grants Pass, OR 97526
NOTICE
CAUTION—Use of controls or adjustments or performance of
procedures other than those specified herein may result in
hazardous radiation exposure.
WARNING—This product, when properly installed and operated, is
considered a Class I laser product. Class I products are not
considered to be hazardous.
There are no user serviceable parts located inside the cover of this device.
Do not attempt to remove the cover of this product. Failure to comply with this
instruction could cause accidental exposure to laser radiation.
Model 831 Manual Page 2 831-9800 Rev D.doc
Table of Contents
1.Introduction ........................................................................................................... 3
1.1.About the Measurement............................................................................................................3
2.Setup...................................................................................................................... 3
2.1.Unpacking..................................................................................................................................3
2.2.831 Layout.................................................................................................................................5
2.3.Initial Operation .........................................................................................................................5
3.Operation ............................................................................................................... 6
3.1.User Interface............................................................................................................................6
3.2.Power On/Off.............................................................................................................................6
3.3.Sample Modes...........................................................................................................................6
3.4.Start/Stop a Sample ..................................................................................................................6
3.5.Sample Screen..........................................................................................................................7
4.Settings Menu........................................................................................................ 7
4.1.To View Settings........................................................................................................................7
4.2.To Edit Settings .........................................................................................................................7
5.Serial Communications ...................................................................................... 10
5.1.Connection ..............................................................................................................................10
5.2.Commands ..............................................................................................................................10
5.3.Real Time Output ....................................................................................................................11
5.4.Comma Separated Value (CSV).............................................................................................11
6.Maintenance ........................................................................................................ 12
6.1.Charging the Battery................................................................................................................12
6.2.Service Schedule.....................................................................................................................12
6.3.Flash Upgrade.........................................................................................................................13
7.Troubleshooting.................................................................................................. 14
8.Specifications...................................................................................................... 15
9.Warranty / Service............................................................................................... 16
Model 831 Manual Page 3 831-9800 Rev D.doc
1. Introduction
The 831 is a small, lightweight, battery operated, handheld mass profiler. This
instrument simultaneously monitors PM1, PM2.5, PM4 and PM10 levels. The
multifunction rotary dial provides simple and efficient operation. The internal battery
pack provides 8 hours of continuous operation. The 831stores up to 2,500 sample
events, which can be viewed on the display or exported to a computer via the USB port.
1.1. About the Measurement
The 831 counts and sizes particles in 7 different size ranges then uses a proprietary
algorithm to convert count data to mass measurements (µg/m3). Fundamentally, the 831
calculates a volume for each detected particle then assigns a standard density for the
conversion.
The standard density value is adequate for most sampling environments. However,
some environments are heavily influenced by high or low density materials which can
reduce measurement accuracy. For these environments, the 831 provides a K-Factor
setting for each measurement range (PM1, PM2.5, PM4 and PM10). These K-Factors
can be modified with Comet software.
2. Setup
The following sections cover unpacking, layout and performing a test run to verify
operation.
2.1. Unpacking
When unpacking the 831 and accessories, inspect the carton for obvious damage. If
the carton is damaged notify the carrier. Unpack everything and make a visual
inspection of the contents. Standard items (included) are shown in Figure 1. Optional
accessories are shown in Figure 2.
ATTENTION:
The included USB driver CD must be installed before connecting the 831 USB port to
your computer. If the supplied drivers are not installed first, Windows may install
generic drivers that are not compatible with this product. See section 5.1.
Model 831 Manual Page 4 831-9800 Rev D.doc
Figure 1 – Standard Accessories
Figure 2 – Optional Accessories
Model 831 Optional Accessories
Model 831 Standard Accessories
831
MOI P/N: 831
Battery Charger
MOI P/N: 390031
USB Cable
MOI P/N: 500787
831 Manual
MOI P/N 831-9800
Calibration
Certificate
MOI P/N:
831-9600
Comet Software
CD
MOI P/N: 80248
USB Drivers CD
MOI P/N: 80328
Carrying Case
MOI P/N: 8517
Boot
MOI P/N: 80450
Zero Filter Kit
MOI P/N: 80846
Flow Meter Kit
MOI P/N: 80530
Model 831 Manual Page 5 831-9800 Rev D.doc
2.2. 831 Layout
The following figure shows the layout of the Model 831 and provides a description of the
components.
Figure 3 – 831 Layout
Component Description
Display 2X16 character LCD display
Keyboard 2 key membrane keypad
Rotary dial Multifunction dial (rotate and press)
Charger Jack Input jack for external battery charger.
Flow Adjust Adjusts the sample flow rate
Inlet Nozzle Sample nozzle
USB Port USB communication port
2.3. Initial Operation
The battery should be charged before initial operation. Refer to Section 6.1 of this
manual for battery charging information.
Complete the following steps to verify proper operation.
1. Press the Power key for 0.5 seconds or more to turn on power.
2. Observe the Startup screen for 3 seconds then the Sample screen (Section 3.5)
3. Press Start / Stop key. The 831 will sample for one minute and stop.
4. Observe the mass values on the display
5. Rotate the Select dial to view additional PM ranges.
6. The unit is ready for use
USB Port
Display
Charger Jack
Inlet Nozzle
Keyboar
d
Rotary Dial
Flow Adjust
Model 831 Manual Page 6 831-9800 Rev D.doc
3. Operation
The following sections cover the basic operation of Model 831.
3.1. User Interface
The 831 user interface is composed of a rotary dial, 2 button keypad and a LCD display.
The keypad and rotary dial are described in the following table.
3.2. Power On/Off
Press and hold the Power key momentarily for power on. Press the Power key for
power off. During power on, the 831 will display the Startup Screen (Figure 4) for
approximately 3 seconds then display the Sample Screen.
Model 831
WWW.METONE.COM
Figure 4 – Startup Screen
Note: The 831 will power down after 5 minutes to preserve battery power providing the
unit is stopped and there is no keyboard activity or USB communications.
3.3. Sample Modes
The 831 has two sample modes: Manual and Continuous (Section 4). Manual mode
configures the unit for single sample events. Continuous mode configures the unit for
nonstop sampling.
3.4. Start/Stop a Sample
Press the START/STOP key to start a measurement. The 831 will display the progress
bar below (Figure 5). In Manual mode, the 831 will sample for one minute and stop. In
Continuous mode, the 831 will run consecutive one-minute sample events until the
operator presses the START / STOP key or the battery is depleted.
SAMPLING...
██████████████
Figure 5 – Sampling Screen
Control Description
Power Key Power the unit on/off. For power on, press for 0.5 seconds or more.
Start/Stop Key Sample Screen START / STOP a sample event
Settings Menu Return to Sample screen
Edit Settings Cancel edit mode and return to the Settings Menu
Select Dial Rotate the dial to scroll through selections or change values. Press the
dial to select item or value.
Model 831 Manual Page 7 831-9800 Rev D.doc
3.5. Sample Screen
The Sample Screen displays mass measurement results. The first line displays the
Favorite range (default = PM2.5). Select a Favorite range in the Settings Menu (Section
4) and the 831 will pin the Favorite range to the top display line. The second line scrolls
(rotary dial) through the remaining ranges and battery capacity. The Sample Screen is
shown in Figure 6 below.
Figure 6 – Sample Screen
3.5.1. Warnings / Errors
Status messages are displayed on the second line of the Sample Screen. When this
occurs, simply rotate the dial to view any PM range on the top line.
A low battery warning indicates there is approximately 15 minutes of operation before
the 831 stops sampling. A low battery condition is shown in Figure 7 below.
PM2.5 50.3 µg
LOW BATTERY!
Figure 7 – Low Battery
The 831 will display “Sensor Noise” or “Sensor Error” if it detects a problem in the
particle sensor. If you observe one of these messages, contact the service center.
4. Settings Menu
Use the Settings Menu to view or change settings. The Settings Menu is shown in Table
1 below.
4.1. To View Settings
Press the Select dial to navigate to the Settings Menu. Rotate the Select dial to scroll
through the settings in Table 1. To return to the Sample screen press Start/Stop or wait
a few seconds and the unit will return automatically.
4.2. To Edit Settings
Press the Select dial to navigate to the Settings Menu. Rotate the Select dial to scroll to
the desired setting then press the Select dial to edit the Setting. A blinking cursor will
indicate edit mode. To cancel edit mode and return to the Settings Menu, press
Start/Stop.
PM2.5 50.3 µg
PM10 112.7 µg
Favorite range
Selectable (rotate dial)
Model 831 Manual Page 8 831-9800 Rev D.doc
Table 1, Settings Menu
Function Description
LOCATION Assign a unique number to a location or area. Range = 1 - 999
HISTORY Display previous samples. See Section 4.2.2
FREE
MEMORY Display the percent of available memory space. When Free
Memory = 0%, the oldest data will be overwritten with new data.
MODE Manual mode for single sample events.
Continuous mode for nonstop sampling.
FAVORITE Pin favorite PM range to the top display line.
TIME Display / set time. Time format is HH:MM:SS
(HH = Hours, MM = Minutes, SS = Seconds).
DATE Display / set date. Date format is DD/MMM/YYY
(DD = Day, MMM = Month, YYYY = Year)
ABOUT Display model number and firmware version
4.2.1. Location Number
Press to Change
LOCATION 001 View screen. Press Select to enter Edit mode.
Rotate and Press
LOCATION 001 Blinking cursor indicates Edit mode. Rotate dial to scroll value.
Press dial to select next digit. Repeat action until last digit.
Rotate and Press
LOCATION 001Rotate dial to scroll value. Press dial to exit Edit Mode and
return to view screen.
4.2.2. Sample History
Press to View
HISTORY Press Select to view history.
30/MAR/2011 L001
10:30:45 #1000
831 will display the last record (Date, Time, Location, and
Record Number). Rotate dial to scroll through records. Press to
view record.
PM1 12.8 µg
PM2.5 50.3 µg
PM4 72.4 µg
PM10 112.7 µg
Location 001
DATE 30/MAR/2011
TIME 10:30:45
Rotate dial to scroll through record data. Press Start/Stop to
return to previous screen.
Model 831 Manual Page 9 831-9800 Rev D.doc
4.2.3. Free Memory
Press to Change
FREE MEMORY 80% View available memory. Press Select to enter edit mode.
Press and Hold
to Clear Memory
Press and hold Select dial for 3 seconds to clear memory and
return to view screen. Return to view screen if no action for 3
seconds.
4.2.4. Mode
Press to Change
MODE MANUAL View screen. Press Select to enter Edit mode.
Rotate and Press
MODE MANUAL Blinking cursor indicates Edit mode. Rotate dial to toggle value.
Press dial to select value and return to view screen.
4.2.5. Favorite
Press to Change
FAVORITE PM2.5 View screen. Press Select to enter Edit mode.
Rotate and Press
FAVORITE PM2.5 Blinking cursor indicates Edit mode. Rotate dial to scroll
ranges. Press dial to select range and return to view screen.
4.2.6. Time
Press to Change
TIME 10:30:45 View time. Press Select to enter edit mode.
Rotate and Press
TIME 10:30:45 Blinking cursor indicates Edit mode. Rotate dial to scroll values.
Press dial to select next digit. Repeat action until last digit.
Rotate and Press
TIME 10:30:45Last digit. Rotate dial to scroll values. Press dial to exit Edit
mode and return to view screen.
4.2.7. Date
Press to Change
DATE 30/MAR/2011 View date. Press Select to enter edit mode.
Rotate and Press
DATE 30/MAR/2011 Blinking cursor indicates Edit mode. Rotate dial to scroll values.
Press dial to select next digit. Repeat action until last digit.
Rotate and Press
DATE 30/MAR/2011Rotate dial to scroll values. Press dial to exit Edit mode and
return to view screen.
4.2.8. About
831
80878-1 V1.0.0 View model number and firmware version.
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