MicroMet - Micro Specialties

MicroMet
MBTU10X Version 1.05
Installation and Operation Manual
Revised 4.26.02
Micro Specialties, Inc.
P.O. Box 871077
Wasilla, Alaska 99687-1077
Ph: 907-373-7424
Fax: 907-376-2894
Micro-Specialties.com
Index
Conventions Used in Manual
1
About MicroMet
1
CR10X Processing for MicroMet
3
Installation
Site Selection
4
Sensor Installation Considerations
4
Installing the MicroMet Communications Unit
5
Setting up a Windows95/98 Computer to Talk with MicroMet
6
Operation
MicroMet Observations
MicroMet Commands
7
8
Warnings and Advisories
10
Communications Cycle
11
Understanding Communication Stats
12
Checking MicroMet Communications Performance
14
CR10X Datalogger Operations
Loading CR10X Program from PC208W
15
Setting up a New Data Station in PC208W
16
Setting your PC’s time in Windows
16
Verifying Sensor Data with PC208W
17
Site Visit
Normal Site Visit Procedures
18
Before Leaving the Site
18
Troubleshooting
No Data Reports Received at AMBCS
19
No CR10X Data Messages
20
Resolving bad Sensor Readings (CR10X)
21
Replacing the CR10X Data Collector Canister
22
Removing the Old CR10X Canister
Installing the New CR10X Canister
CR10X Files
22
23
25
Conventions Used in This Manual
MicroMet and CR10X commands are printed in bold face for clarity.
‘Warning:’ indicates that a command or configuration change could have an adverse
affect on system performance.
MicroMet command parameter options are shown in square brackets to indicate that
they are indeed optional. Required parameters are not shown in brackets.
About MicroMet
The MicroMet MBTU10X is designed to transport data, gathered by a Campbell
Scientific CR10X Datalogger, across the AMBCS Meteor Burst Data network. The
MicroMet MBTU10X is very simply a data modem. It does no data collection or data
manipulation or data validation. Any data received from the CR10X will be cheerfully
passed along to AMBCS. The CR10X program contains some programming that is
specific to the MicroMet transport system. As with any data transport system there are
some rules that must be adhered to, if data is to be successfully transported to the
desired destination. The rules are simple:
1. Data reports are received from the CR10X via a data cable connected between the
CR10X 9 pin CS I/O connector and the MicroMet 10 pin IDC J4 connector. We
provide that cable for you. This connection is set in the MicroMet to operate at 1200
baud and the CR10X will adapt to that rate.
2. Data reports consist of a comma delimited string containing the storage area ID of
444, the Julian date, the time in HHMM format, and from one to sixteen data points.
The string is terminated with a carriage return. A report as follows:
444,123,0000,1253,0,4000 is from day 123 at midnight and has three sensors 1253,
0, and 4000.
3. Data points are integers in the range of 0 through 4095. Negative numbers are
given the value of zero. Real numbers are truncated at the decimal point. (123.123
becomes 123) Numbers greater than 4095 are given the value of 4095.
4. The CR10X time must be set to Alaska Standard Time.
With these rules in mind, the CR10X may be programmed to send reports at any
interval, but the data must be scaled to the correct integer size. You can observe the
data messages generated by the CR10X either by using the PC208W terminal tab or by
observing them as they pass through the MicroMet unit (verbose 5 command).
MicroMet Manual
Pg. 1
MicroMet Manual
Pg. 2
CR10X processing for MicroMet
Version 1.03 and above
The CR10X, when used with the MicroMet MBTU10X for data transport, must be
programmed specifically with the MBTU10X in mind. The CR10X must:
1. Output a data message to its serial port at 1200 baud. The data message format
must be as follows: 444,JJJ,HHMM,s1,s2…snCRLF
2. Data points must be integer values in the range of 0 to 4095. Any non-integer
values are truncated by MBTU10X to integer size (40.99 becomes 40). Any values
less than zero (0) become zero (0). Values larger than 4095 become 4095.
The process in the CR10X looks like this:
! Assign the data storage ID of 444.
! Every few seconds:
1. Read the sensors.
! Every hour:
1. Calculate and save the hourly summary values to input locations.
2. Scale the input locations for transport (0-4095) and output them to the serial port.
(Also saved to output locations.)
3. Output a CRLF sequence to the serial port.
! Every day (midnite):
1. Calculate and save the daily summary to input locations.
Things to consider when modifying a CR10X program for MicroMet:
! Sensors
! Sensor input labels. Edit these with PC208W so they match what sensors you
actually have.
! Transport scaling.
! Number of sensors output from scaling input area.
! Scaling input labels. (vB12, iSWT, iPst,…) These must be in order delivered to
master station.
MicroMet Manual
Pg. 3
Installation
Site Selection Considerations
Communications Window Aperture
What is the horizon in the direction of radiation (toward the Master Station)? If the horizon
toward AMBCS is high and the site is at long range (600+ miles), communications may be
very slow.
Local Interference
Try to locate the station away from potential radio interference sources such as high
voltage power transmission lines, engine ignition systems, etc. When potential
interference systems are in the general area, try to locate the site such that the antenna
does not look toward those interference sources.
Sensor Installation Considerations
Here are some thoughts regarding the installation of the sensors.
1. It is generally a good idea to keep the site power cabling, the coaxial antenna cable
and the sensor cabling separated as much as possible to keep the sensor noise out
of the radio receiver and to keep the radio transmitter power out of the sensors.
Three separate access holes are provided in the NEMA box with that in mind.
Excess cable length should be coiled in a figure eight fashion to minimize inductive
coupling.
2. Since sensor mounting devices have metallic components, and sensors themselves
can be noise sources, it is wise to locate the sensors away from the plane of the
radio antenna. Try not to locate sensors near the antenna or within the antenna’s 60
degree window toward the Master Station. If possible, locate sensors and their
structure off to the side of the antenna.
MicroMet Manual
Pg. 4
Installing the MicroMet Communications Unit
MicroMet data communications units come in two varieties, one with a 300 watt
transmitter and one with a 100 watt transmitter. Both varieties are functionally
equivalent, but have slightly different component configurations. The MicroMet 100
requires only a single12 volt power source, while the MicroMet 300 requires a
transmitter battery pack and a Power Control Unit which charges the transmitter battery
pack from the 12 volt power source.
The steps involved in installing the MicroMet unit are as follows:
! Mount the MicroMet unit securely to the enclosure wall or mounting panel.
! Mount the Power Control Unit to the enclosure wall or mounting panel (MicroMet 300
only).
! Connect the MicroMet/Power Control Unit interconnect cabling (MicroMet 300 only).
! Mount the CR10X to enclosure wall or mounting panel.
! Connect the MicroMet data cable between the CR10X CS I/O receptacle and the
MicroMet J4 receptacle.
! Connect the Coaxial antenna cable to the Antenna receptacle on the MicroMet.
! Connect the 12 VDC power cable between the site battery and the MicroMet 12
VDC receptacle (MicroMet 100 only).
! Connect the 12 VDC power cable between the site battery and the Transmitter
Battery Pack (MicroMet 300 only).
! Place the Power switch on the Power Control Unit in the “on” position (MicroMet 300
only).
This completes the general installation of the MicroMet data communications unit.
Please remember to verify proper operation of the MicroMet unit before departure (see
Checking MicroMet Communications Performance, pg 14).
MicroMet Manual
Pg. 5
Setting up a Windows95/98 Computer to talk with the MicroMet
Normal operation of the MicroMet unit is fully automatic, and should require little
attention. When the site is first powered up, and before departing the site, it is a good
idea to connect to the MicroMet unit to verify that proper communication is occurring.
You can use Windows Hyperterm to talk with the MicroMet unit.
Here is what you do:
1. Start up Hyperterm (start > programs > accessories> Hyperterm).
2. Cancel the startup banner.
3. Select: file > new connection. Name the new connection MicroMet. Then OK.
4. Select Connect using: Direct to COM2 (or whichever COM port your nine pin
connector occupies)
5. Properties window pops up. Select 9600 baud, 8 bits, no parity, 1 stop bit, and no
flow control.
6. OK your way out of the properties panel.
7. You should now be all set to talk with the MicroMet.
MicroMet Manual
Pg. 6
Operation
MicroMet Observations.
The top MicroMet printed circuit board has five Light Emitting Diodes (LED) That can tell
you a lot about how the MicroMet is communicating. On power up, or cold start,
MicroMet enables the lights. MicroMet will automatically turn the lights off at midnight,
or they may be turned on or off with the lights command. A summary of the lights:
! SP - Signal Presence. This light indicates that the receiver is acquiring a signal.
This signal could be the Master Station or it could be local noise. Unless you are
within 100 miles of the Master Station, this light should NOT be on all the time.
Remember that meteor events are short in duration.
! SYNC – Sync Detected. Embedded in the Master Station’s probe is a sync
character which MicroMet uses to verify that the probe is valid. When MicroMet
detects this character in proper sequence, it has acquired sync with the Master
Station. When sync is acquired MicroMet momentarily turns on the SYNC light.
! TX – Transmitter On. MicroMet is attempting to send a message in response to a
valid Master Station probe.
! VSWR – The radio transmitter has detected a faulty antenna or coaxial cable. No
communication is possible while condition persists.
! LOPWR - The radio transmitter’s power output is low. This may be an indication of
a faulty radio transmitter or a weak battery. This light often accompanies the
HIVSWR light, as the transmitter shuts down in response to the HIVSWR.
MicroMet Manual
Pg. 7
MicroMet Commands - MBTU10X Rev 1.05
The Micromet command structure is simple and concise. All commands are terminated
with the ENTER key.
Canmsg [n] or [off] – Generate a new simulated data message n sensors in length
once per minute.
Example: canmsg 8 – will generate a new simulated data message of eight
sensors each minute, on the minute.
To use this function, you should know what number of sensors AMBCS expects from
your remote.
Warning: Canmsg will generate messages until you turn it off with the command:
canmsg off. This will interfere with normal data transport.
Warning: Canmsg uses the MicroMet clock to generate message. Set the time before
turning canmsg on.
Warning: If the Canmsg sensor count parameter is not set to the number of sensors
expected by the Master Station, the TX/ACK ratio may be very high.
MicroMet 1.05 and above turn Canmsg off at midnite.
Id [nnnn] – Display or set the primary communication identifier. This should normally
not be changed without coordination with the AMBCS System Administrator.
Warning: Changing this value may cause the unit to fail to communicate with AMBCS.
Lights [on] or [off] – This command allows the user to enable or disable the test lights
on the transceiver interface. MicroMet automatically turns the lights on at start up and
off at midnight.
Reset – Restart the system.
Warning: Parameters such as ID are NOT reset to default values. If you change the
ID inadvertently, you MUST change it back explicitly to the correct ID.
Stat – Display communications statistics. Values are displayed for the current day and
the current hour. Values displayed are:
RXSP – The number of times the receiver threshold has been crossed. Probable
receptions from the Master Station.
SYNC – The number of verified receptions from the Master Station.
RXERR – The number of times this unit failed to verify a reception (receive sync).
XMIT – The number times this unit has turned on its transmitter.
ACK – The number of times this unit has received an acknowledgement from the
Master Station in response to a message transmission.
HIVSWR – The number of times the transmitter has detected a bad
antenna/coax.
LOPWR – The number of times the transmitter has failed to develop full power.
MicroMet Manual
Pg. 8
T – Test transmission. MicroMet will turn on its transmitter and attempt to send
whatever is in its immediate transmit queue. This is a quick way to test the antenna
system. Any faults will result in warning messages. If no warnings are displayed, then
the antenna and transmitter systems are OK.
Warning: Test transmission is meaningless until a data message has been
enqueued. After a COLDSTART, set the time and use canmsg to enqueue a data
message before using Test transmission.
Version 1.05 and above will generate a single canned message if no message has been
enqueued.
Time [YY MM DD HHMM] – Display or set the unit’s real time clock.
Verbose [+] or [-] or [nn] – Display or set the level of advisories issued by MicroMet.
Any value between 1 and 100 may be entered. + increments the value by one, decrements the value by one. The default value is 1. A value of 5 or above will allow
MicroMet to display data reports as they are received from the CR10X (see Warnings
and Advisories, pg 10.)
Txrate [n] – Display or set the sync rate at which MicroMet is allowed to respond to
AMBCS. MicroMet will respond to no more than every nth sync. This keeps remotes in
close proximity to each other from responding simultaneously. Default is 10.
Warning: Please check with the AMBCS system administrator before adjusting this
parameter!
MicroMet Manual
Pg. 9
Warnings and Advisories
MicroMet may issue various advisories or warnings to indicate a change in system
status. Advisories are simply a way for MicroMet to advise you of a normal change of
status. Warnings are meant to get your attention, and to warn you of an unexpected
problem. Warnings are always issued without regard to the verbosity level, while
advisories are keyed to the verbosity level. The higher the verbosity level the more
advisories will be issued.
ADVISORY
YY/MM/DD HHMM New data Msg:…
This advisory indicates that MicroMet has received a new data message from
the CR10X. This new message is immediately enqueued for delivery to AMBCS.
This advisory is displayed at a verbosity level 5 and above.
ADVISORY
YY/MM/DD HHMM Message delivered to Master Station.
This advisory indicates the data message has been delivered and
acknowledged by the Master Station. The message is immediately dequeued.
This advisory is displayed at a verbosity level
WARNING
YY/MM/DD HHMM HiVSWR! Check antenna System.
This warning indicates that the radio transmitter has detected a bad antenna or
transmission line. If this condition persists, no communication will occur. Check
the antenna for proper assembly and broken components. Check the coaxial
transmission line for continuity, good connections, etc. See Troubleshooting,
pgs 19-23). This warning may also accompany the HiVSWR warning as the
transmitter does shut down during a HiVSWR event.
WARNING
YY/MM/DD HHMM Low Transmitter Power!
This warning indicates that the radio transmitter is not developing the proper
level of transmit power. Check the capacity of the system battery and
connections. This warning may also accompany the HiVSWR warning as the
transmitter does shut down during a HiVSWR event.
MicroMet Manual
Pg. 10
Communications Cycle
MicroMet MBTU10X operates as a power conserving remote node in a ‘star’ network
topology. The network protocol is implemented with a ‘probing Master Station’. This
means that a MicroMet talks only to the Master Station, and that it communicates only in
response to a probe from the Master Station. In this configuration, the Master Station is
continually probing in an attempt to initiate communication with any remote node
(MicroMet). Meteor Burst phenomena provides a type of automatic time division
multiplexing such that it is unusual for multiple remote nodes to ‘see’ the Master
Station’s probe simultaneously.
From the MicroMet’s perspective, it’s role is to listen for the probe. If MicroMet receives
a valid probe, then it will attempt to respond by transmitting a data message from it’s
queue. At the end of it’s transmit cycle, MicroMet listens for an acknowledgement
(ACK), which the Master Station will send in response to the data message. If the ACK
is received, MicroMet will dequeue the data message, and return to the listening state. If
MicroMet has no messages enqueued for delivery to the Master Station, it will not
transmit a response to the probe.
Master Station
Probe
#
ACK
MicroMet Manual
MicroMet
--------------------------------------------------!
-------------------------------------------- Data Message
------------------------------------------------ !
Pg. 11
Understanding Communications Statistics (Stat Command)
RXSP
Signal Presence – this is the number of times the radio receiver has
detected a radio signal that may have been a signal from the Master
Station, or it may have been radio interference. In close proximity to the
Master Station, the MicroMet will normally detect many thousands of
RXSPs per hour. At meteor range, 150-1000 miles, the MicroMet will most
likely detect a few hundred RXSPs per hour.
SYNC
Sync Character Detected – when the receiver detects a signal (RXSP) the
MicroMet begins to watch for a special code in the received data stream
called a Sync character. This Sync character must be received in order to
validate the signal received from the Master Station. Under ideal
conditions, for each reception (RXSP), MicroMet would receive one Sync
or validated reception. Under normal conditions, errors in the received
data caused by radio interference, make the ratio of RXSPs to Syncs
somewhat greater than 1:1. A good ratio in the field is probably around 2
or 3 to 1.
RXERR
Receive Errors – if the MicroMet detects the Sync during a reception, it
then continues to receive data until the entire probe is complete. If all goes
well with the reception, and the data stream is complete, then the RXERR
does not increment. A high number of RXERRs indicates poor reception
due to interference.
XMIT
Transmit Cycles – this number is incremented each time the MicroMet
turns on its transmitter. Under ideal conditions the MicroMet would
activate it’s transmitter only once for each data message it receives from
the CR10X.
ACK
Acknowledgement of Data packet – when the MicroMet transmits a data
message, it hopes to immediately receive an ACK from the Master
Station. If this ACK is received, MicroMet dequeues the data message and
shows a ‘Message Delivered’ advisory on the operator’s console or PC
Terminal. If no ACK is received, the data message remains enqueued,
and the MicroMet will attempt to transmit the data again. MicroMet can
only transmit in response to a ‘probe’ or valid reception, which it receives
from the Master Station.
XMIT
TO ACK
Transmit to ACK Ratio – under ideal conditions, the ratio of XMIT to ACK
would be 1:1. In the field, a ratio of 2 or 3 to 1 should be considered to be
very good. A ratio in excess of 10 or 20 to 1 should be considered to be
very marginal. If no ACKs are received, no data messages are being
delivered and the site is nonfunctional!
MicroMet Manual
Pg. 12
HIVSWR
High Voltage Standing Wave Ratio – this means that during a transmit
cycle, MicroMet’s transmitter hardware detected a problem with the
coaxial transmission line or the antenna. When this happens, the transmit
cycle is terminated, and no data delivery has taken place. MicroMet
always prints a WARNING when this happens.
LOPWR
Low Transmitter power – this means that during a transmit cycle,
MicroMet’s transmitter hardware detected a low transmitter power level.
When this occurs, the transmit cycle continues, and data delivery may still
have taken place. MicroMet always prints a WARNING when this
happens.
LOPWR can be caused by:
1. A marginal or depleted battery in the transmitter battery pack
(MicroMet 300 only).
2. A marginal or depleted site battery (MicroMet 100 only).
3. If HIVSWR also occurred, a faulty coax or antenna.
4. A bad transmitter.
MicroMet Manual
Pg. 13
Checking MicroMet Communications Performance
1. Connect the MicroMet cable between the PC and J3 of the MicroMet unit.
2. Type the command Verbose 5 followed by the ENTER key. MicroMet should
respond ‘Verbosity 5’. This tells MicroMet to display level five warnings and
advisories.
3. Set the MicroMet time with the time command. The time command uses the form:
time YY MM DD HHMM. MicroMet will respond with the correct time.
4. With verbosity set to level five (verbose 5), MicroMet will print an advisory each time
a new data message is received from the CR10X (usually on the hour), and will print
an advisory each time a message is delivered to the Master Station.
5. Use the Stat command to display MicroMet performance statistics. Stats are
compiled for the current day as well as the current hour. Transmit to
Acknowledgement ratio is an important performance statistic. This ratio should not
normally exceed 10 to 1, and should usually be in the range of 2 or 3 to 1 over a
long period of time. (See stat command explanation, pg 8, for a description of
information displayed).
Warning: Sometimes the PC can interfere with the radio receiver. When this is
happening, the SP light will flash more frequently, and the SP to SYNC ratio will be low.
It is generally a good idea to unplug the cable at the MicroMet J3 connector between
uses. Plug in, check status, then unplug.
Since I am impatient, and I don’t like to wait for the data logger to generate messages, I
usually use canmsg to generate a few messages very quickly. To do this:
1. Set the MicroMet time. Time YY MM DD HHMM
2. Turn on canned message mode. Canmsg 8. The parameters here should match
the number of sensors expected from the CR10X.
3. Observe the messages being generated and take stats occasionally. Canmsg will
post a new message every minute.
4. Don’t forget to turn the canned message mode off when you are through testing!
Canmsg off.
MicroMet Manual
Pg. 14
CR10X Datalogger Operations
Loading a CR10X program from PC208W
When a new program needs to be installed in the CR10X data logger at a MicroMet
data site, you must connect to the CR10X with your PC, start PC208W and send the
program to the CR10X from your PC with PC208W. The file to be sent to the CR10X is
called a DLD file and has the file extension of dld. Hence the file may be named
coldfoot.dld for example. Here are the steps to follow:
! If the dld file was provided to you on floppy diskette, copy it to the PC208W
directory. The file path to the PC208W directory varies from PC to PC but should be
something like C:\Campbell\PC208W or C:\CSI\PC208W.
! Start PC208W
! From the PC208 floating tool bar select the CONNECT button.
! The CR10X data logger connection window will appear. This window has three
tabs along its bottom edge. Select the TOOLS tab.
! From the Station list on the TOOLS tab, select the data station your are visiting. If
the station you are visiting is not listed, see Setting up a New Station in PC208W,
pg 16.
! Make sure that the correct DLD file is associated with your data site. If it is not,
press the Associate DLD Program button on the TOOLS tab, use the OPEN
window to navigate to the PC208W directory, and select the correct dld file for this
site.
! Connect the SC929 Campbell Cable between the CR10X CS I/O connector and you
PC’s serial data (COM) port.
! Press the CONNECT button on the TOOLS tab. This will open a connection
between your PC and the CR10X.
! Verify that the CR10X time is displayed in the Clock Synchronization area and is
correct. Remember that our system operates on Alaska Standard Time. If the
CR10X time is not Correct, its time may be set to your PC’s time by pressing the Set
Datalogger CLK button on the TOOLS tab. If your PC’s time is not set to the
correct Alaska Standard Time, see Setting your PC’s time in Windows95, pg 16.
! To send the dld file to the CR10X, press the SEND button on the TOOLS tab.
PC208 will warn you that changing the program may not be what you want to do. If
you choose to proceed, the DLD file transfer progress bar will advance, and you
will eventually get a successful transfer window, indicating that the new file has
indeed been sent to the CR10X.
! Upon successful installation of the new program, you should verify that the program
works correctly with your sensors. See Verifying Sensor Data with PC208W, pg
17.
! Once you are satisfied with your sensor data you may X out of PC208. Be sure to
disconnect your SC929 Campbell Cable from the CR10X and reconnect the
MicroMet cable to the CR10X.
MicroMet Manual
Pg. 15
Setting up a New Data Station in PC208W
PC208W is Campbell Scientific’s CR10X maintenance program that runs under
Windows. Before you can send a dld program to your CR10X or check on your physical
sensor readings, you must set up a connection between PC208W and the CR10X at the
site. These are the steps to follow:
! Start PC208W
! On the PC208W floating tool bar, press the SETUP button. This will bring up the
Setup Connections window.
! On the Setup Connections window press the Add Device button. This will bring up
a window named Add New Device.
! On the Add New Device window, select CR10X datalogger then select the Com
port with which you will communicate with the CR10X. You will want to use the Com
port on your PC which has the nine pin connector. Once the CR10X and Com port
are selected, press OK.
! On the Setup Connections window, highlite and rename the datalogger name to a
name that will make sense for this site. For example Kenai_MP for Kenai Moose
pens.
! On the Setup Connections window, set the Baud Rate to 9600.
! On the Setup Connections window press Save Edits to save the new site
connection.
! Exit Setup Connections. Your new site connection is complete.
Setting your PC’s time in Windows
PC208W uses your PC’s date and time to set the data and time in the CR10X. Before
allowing PC208W to set the CR10X date and time, you must be certain that the date
and time in your PC are correctly set to Alaska Standard Time, not Alaska Daylight
Time. Follow these steps to set your PC’s date and time:
! Right click the Time on the right side of the Windows Task Bar.
! Select Adjust Date/Time from the menu that pops up.
! All Date and Time parameters may be individually highlighted and set with the
Date/Time Properties window.
! On the Date/Time Properties window press OK to apply the new date and time to
your PC.
MicroMet Manual
Pg. 16
Verifying Sensor Data with PC208W
Campbell Scientific’s Windows based Data Logger maintenance program, PC208W can
be used to verify that the sensor data collection is proceeding correctly at your new or
existing MicroMet data site. Here are the steps to look at your sensor data:
!
!
!
!
!
!
!
!
Start PC208W
From the PC208 floating tool bar select the CONNECT button.
The CR10X data logger connection window will appear. This window has three
tabs along its bottom edge. Select the TOOLS tab.
From the Station list on the TOOLS tab, select the data station your are visiting. If
the station you are visiting is not listed, See Setting up a New Station in PC208W,
pg 16.
Connect the SC929 Campbell Cable between the CR10X CS I/O connector and you
PC’s serial data (COM) port.
Press the CONNECT button on the TOOLS tab. This will open a connection
between your PC and the CR10X.
Select the NUMERIC DISPLAY tab.
Numeric values will be displayed on this tab for all the physical sensors installed at
the site. These values are displayed in real numbers that should make sense
compared to actual observed values at the site. If they don’t you should tale a close
look at your sensors, sensor wiring, etc. If all sensors are not displayed on the
numeric display, you can ADD them by pressing the ADD button and dragging them
from the Inloc list which will pop up. We try to place all sensors at the beginning of
the inloc list.
MicroMet Manual
Pg. 17
Site Visit
Normal Site Visit Procedures
Whenever a visit is made to a MicroMet data site, the following checks should be
performed at a minimum: ( You can capture this session with HyperTerm capture
mode.)
!
Connect the PC to the MicroMet at J3. Located at the bottom right most connection
on the MicroMet CPU.
Collect and observe the communication statistics: STAT.
Verify acceptable TX to ACK ratio (less than 10:1).
Verify acceptable SP to SYNC ratio (less than 2:1).
Verify no HIVSWR or LOWPWR.
!
Connect PC to CR10X CSIO and run PC208W.
Use NUMERIC DISPLAY to verify sensor acquisition.
Verify CR10X time is correct (Alaska Standard Time), set if necessary.
!
Verify proper antenna orientation, solar panel, etc.
Before leaving the site
Before you leave the site it would be a very good idea to:
!
!
!
!
!
!
!
Verify that MicroMet communication statistics are normal. Abnormalities include:
1. A high transmit to ack ratio.
2. HiVSWR warnings.
3. Low power warnings.
Record status and any abnormalities. IE: transmit to ack ratio, etc.
Verify that the cable connecting MicroMet and the CR10X is properly in place. If this
cable is not in place, no data will ever reach the Master Station.
Watch at least one data message get acknowledged. (verbose 5) see Warnings
and Advisories, pg 10.
Canmsg off.
Take the SC929 CR10X to PC cable with you.
Take the MicroMet to PC cable with you.
MicroMet Manual
Pg. 18
Troubleshooting
No Data Reports Received at AMBCS
Before troubleshooting, read and understand MicroMet Observations (pg 6), Stat
Commands (pg 7), and Checking MicroMet Communications Performance (pg 13).
If no data reports are being received from a MicroMet site, a site visit may be required to
determine the source of the problem. Since the MicroMet will only transport data that it
receives from the CR10X, troubleshooting procedures can be broken down to two
questions:
! Is the MicroMet receiving data messages from the CR10X?
! Is the MicroMet communicating properly with AMBCS?
First, connect your PC to the MicroMet and observe its communication statistics. If the
number of SPs and SYNCs are low to nonexistent, the problem is likely in the antenna,
interference, coax, receiver, or site selections. Try a test transmission to verify the
antenna/coax. If the test elicits no warnings, the problem is most likely in the receiver
and the MicroMet should be replaced.
If the SYNCs are good but no transmissions have been attempted (TX=0), then most
likely the MicroMet is not receiving data messages from the CR10X. Set verbosity to 5
and observe the absence of new data advisories after an expected data message time
frame. (Proceed to no CR10X data messages, page 19)
If the transmit to acknowledgment ratio is high, do a test transmission to verify the
antenna/coax. Remember that zero (0) reports at AMBCS should translate to zero (0)
acks at the MicroMet. Problems in the antenna/coax/battery should elicit HIVSWR or
Low Power warnings!
MicroMet Manual
Pg. 19
No CR10X Data Messages
!
If you suspect that the CR10X is not producing any data messages, you should
connect your PC to the CR10X and run PC208W.
!
If the CR10X time is drastically incorrect or even not incrementing, the CR10X
should be replaced.
!
Monitor the CR10X data with NUMERIC DISPLAY to verify that sensor data is being
collected.
!
You can also monitor the data messages being sent to the MicroMet by opening the
TERMINAL tab on PC208W. If data messages appear here at the expected
interval, then the CR10X is probably okay. These data messages traverse the cable
between the CR10X CSIO and the MicroMet J4, verify this cable is plugged in
correctly at both ends.
MicroMet Manual
Pg. 20
Resolving Bad Sensor Readings (CR10X)
!
Connect your PC to CR10X CSIO, and run PC208W.
!
Use the NUMERIC DISPLAY tab to observe the live data being collected by the
CR10X. If these data do not seem reasonable, then you will have to refer to
documentation pertaining to the suspect sensor(s). Some sensors connect directly
to the CR10X wiring panel while others require some interface electronic modules.
The basic process to keep in mind is that the CR10X must excite or “turn on” each
sensor, then read some sort of returned value (usually a voltage) from the sensor.
The CR10X then converts this returned value to real numeric values.
See also: Verifying Sensor Data with PC208W (pg 17).
MicroMet Manual
Pg. 21
Replacing the CR10X Data Collector Canister
The CR10X Data Collector is the unit which interfaces to, and collects data from
physical sensors at your data site. It is located in the wall mounted, gray plastic NEMA
enclosure. By replacing only the CR10X canister and not its wiring panel, it will be
possible to leave the existing sensor wiring undisturbed. See page 24 for an exploded
overview of the CR10X and its wiring panel. Please read and understand these
instructions prior to attempting to replace the CR10X canister. Should you have any
questions, please do not hesitate to contact Micro Specialties, Inc.
Removing the old CR10X canister
!
!
!
!
!
!
Unplug the power in and CSIO connectors from the upper right corner of the CR10X
wiring panel. Both of these connectors are friction fit only. Gently grasp each
connector by its plastic shell (not by the wiring) and withdraw it from its receptacle
with a slight rocking motion.
Loosen the knurled thumbscrew at the right side center of the wiring panel. This will
allow the removal of the wiring panel end cap. It is not necessary to completely
remove the thumbscrew.
Remove the wiring panel end cap by lifting the wiring panel slightly, then pulling the
end cap to the right to disengage it from the wiring panel. The end cap is tabbed into
slots in the wiring panel mounting bracket. By tilting the end cap far to the right,
these tabs may be disengaged, and the end cap may be completely removed.
Without disturbing the sensor wiring, gently tilt the wiring panel and canister to the
left to facilitate the canister’s removal.
The canister is attached to the wiring panel only by the friction fit of two data
connectors on the left end of the canister. Remove the canister by gently rocking
and pulling it to the right and away from the wiring panel.
Set this canister aside so as to not confuse it with the replacement canister.
MicroMet Manual
Pg. 22
Installing the new CR10X canister
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!
Examine the replacement CR10X canister. Notice that it has two connector plugs
which must engage two connector receptacles on the wiring panel. Notice also that
the wide connector plug must be up in relation to the mounting bracket.
Slide the new canister from right to left into the wiring panel.
Carefully, but firmly seat the canister’s plugs into the wiring panel’s receptacles.
Some rocking and pushing motion will facilitate this.
Insert the tabs of the end cap into the mounting bracket at the right end of the newly
installed canister. The thumbscrew tab will project toward the wiring panel when
inserted correctly.
Insert the thumbscrew tab into the wiring panel. The thumbscrew tab slides into the
wiring panel end such that the thumbscrew engages the thumbscrew slot in wiring
panel.
Make sure that the rubber bumpers on the end cap project into the recessed end of
the canister.
Tighten the thumbscrew while maintaining moderate pressure toward the canister on
the end cap.
Reinstall the Power In connector and the CSIO connector.
Prior to closing up the wall mounted enclosure, double check that both the Power In
and the CSIO connectors are properly installed.
MicroMet Manual
Pg. 23
MicroMet Manual
Pg. 24
CR10X Files
All CR10X files are maintained by Campbell Scientific’s PC208W program. PC208W
usually installs files in the path: c:Campbell\pc208w
Sitename.CSI – This is the CR10X’s source program file. This file may be
carefully edited to adjust such parameters as sensor update rate, data report
interval, etc.
Sitename.DLD - This is the CR10X’s executable program file. When you make
a change to the CSI file and compile it, the DLD file must be sent to the CR10X.
Sitename.DAT – This is the site’s data file. When you ask PC208W to retrieve
data from the CR10X, it puts that data here.
MicroMet Manual
Pg. 25
MicroMet Manual
Pg. 26