Geokon 8025 User manual

Instruction Manual
Model 8025
(Micro-800)
Multi-Channel Datalogger
No part of this instruction manual may be reproduced, by any means, without the written consent of Geokon, Inc.
The information contained herein is believed to be accurate and reliable. However, Geokon, Inc. assumes no responsibility for
errors, omissions or misinterpretation. The information herein is subject to change without notification.
Copyright © 2015-2017 by Geokon, Inc.
(Doc Rev L, 3/12/18)

Warranty Statement
Geokon, Inc. warrants its products to be free of defects in materials and workmanship, under
normal use and service for a period of 13 months from date of purchase. If the unit should
malfunction, it must be returned to the factory for evaluation, freight prepaid. Upon examination
by Geokon, if the unit is found to be defective, it will be repaired or replaced at no charge.
However, the WARRANTY is VOID if the unit shows evidence of having been tampered with
or shows evidence of being damaged as a result of excessive corrosion or current, heat, moisture
or vibration, improper specification, misapplication, misuse or other operating conditions outside
of Geokon’s control. Components which wear or which are damaged by misuse are not
warranted. This includes fuses and batteries.
Geokon manufactures scientific instruments whose misuse is potentially dangerous. The
instruments are intended to be installed and used only by qualified personnel. There are no
warranties except as stated herein. There are no other warranties, expressed or implied, including
but not limited to the implied warranties of merchantability and of fitness for a particular
purpose. Geokon, Inc. is not responsible for any damages or losses caused to other equipment,
whether direct, indirect, incidental, special or consequential which the purchaser may experience
as a result of the installation or use of the product. The buyer’s sole remedy for any breach of this
agreement by Geokon, Inc. or any breach of any warranty by Geokon, Inc. shall not exceed the
purchase price paid by the purchaser to Geokon, Inc. for the unit or units, or equipment directly
affected by such breach. Under no circumstances will Geokon reimburse the claimant for loss
incurred in removing and/or reinstalling equipment.
Every precaution for accuracy has been taken in the preparation of manuals and/or software,
however, Geokon, Inc. neither assumes responsibility for any omissions or errors that may
appear nor assumes liability for any damages or losses that result from the use of the products in
accordance with the information contained in the manual or software.

TABLE of CONTENTS
1. OVERVIEW .........................................................................................................................................................1
2. HARDWARE........................................................................................................................................................1
3. INSTALLATION....................................................................................................................................................2
3.1 TURNING ON POWER................................................................................................................................................2
3.2 EARTH GROUND ......................................................................................................................................................3
3.3 GAGES ...................................................................................................................................................................3
3.4 COMMUNICATIONS ..................................................................................................................................................3
4. SOFTWARE .........................................................................................................................................................3
5. BATTERY MAINTENANCE....................................................................................................................................4
5.1 AC POWER .............................................................................................................................................................4
5.2 SOLAR POWER.........................................................................................................................................................4
5.3 EXTERNAL BATTERY ..................................................................................................................................................4
5.4 BATTERY REPLACEMENT ............................................................................................................................................4
5.5 FUSES ....................................................................................................................................................................4
6. TROUBLESHOOTING ...........................................................................................................................................5
APPENDIX A. SPECIFICATIONS ................................................................................................................................7
A.1 CR800 MEASUREMENT AND CONTROL MODULE ..........................................................................................................7
A.1.1 Analog Inputs..............................................................................................................................................7
A.1.2 Excitation Outputs ......................................................................................................................................7
A.1.3 Pulse Inputs.................................................................................................................................................7
A.1.4 Control Ports ...............................................................................................................................................8
A.2 AVW200 VIBRATING WIRE INTERFACE (SEE AVW200 MANUAL FOR COMPLETE SPECIFICATIONS) ........................................8
A.3 MODEL 8032 MULTIPLEXER (SEE THE APPENDIX FCOMPLETE SPECIFICATIONS)...................................................................8
APPENDIX B. SHIP LIST ...........................................................................................................................................8
APPENDIX C. DATA STORAGE .................................................................................................................................9
C.1 INPUT LOCATIONS ....................................................................................................................................................9
C.2 DATA STORAGE .......................................................................................................................................................9
C.3 DATA STORAGE EXAMPLE........................................................................................................................................10
APPENDIX D. SYSTEM WIRING ............................................................................................................................. 11
D.1 CR800 WIRING (8025-2, 8025-3 AND 8025-4) ......................................................................................................11
D.2 AVW200 WIRING (8025-2, 8025-3 AND 8025-4) ..................................................................................................11
D.3. CR800 WIRING (8025-5).....................................................................................................................................11
D.4 RS-232 CONNECTOR WIRING .................................................................................................................................12
D.5 CHARGER WIRING .................................................................................................................................................12
D.6 CABLES ................................................................................................................................................................12
D.6.1 AC Charger (110VAC/220VAC)..................................................................................................................12
D.6.2 External Power Cable................................................................................................................................12
D.7 FUSES..................................................................................................................................................................13
D.8 MULTIPLEXER CONNECTOR WIRING ..........................................................................................................................13

APPENDIX E. LOGGERNET QUICK START GUIDE ................................................................................................... 14
E.1 OVERVIEW ........................................................................................................................................................... 14
E.2 GETTING STARTED ................................................................................................................................................. 14
E.2.1 Program Files............................................................................................................................................ 14
E.2.2 Connection Setup...................................................................................................................................... 14
E.2.3 Connecting to the Datalogger .................................................................................................................. 17
E.3 MODIFYING THE DATALOGGER PROGRAM.................................................................................................................. 18
E.3.1 Editing the CRBasic Program .................................................................................................................... 18
E.3.2 Uploading Files ......................................................................................................................................... 20
E.4 DATA HANDLING................................................................................................................................................... 23
E.4.1 Data Collection Configuration .................................................................................................................. 23
E.4.2 Live Monitoring ........................................................................................................................................ 24
E.4.3 Collecting Data ......................................................................................................................................... 25
APPENDIX F. 8032 MULTIPLEXER MANUAL .......................................................................................................... 26
F.1 THEORY OF OPERATION.................................................................................................................................... 26
F.2 MICRO-800/MICRO-1000 MODE OF OPERATION................................................................................................... 29
F.3 WIRING ............................................................................................................................................................. 30
F.4 MODEL 8032-27 AND LOAD CELL WIRING ................................................................................................................ 33
F.5 TROUBLESHOOTING ......................................................................................................................................... 34
F.6 SPECIFICATIONS................................................................................................................................................ 34
F.6.1 General ..................................................................................................................................................... 34
F.6.2 Relays........................................................................................................................................................ 34
F.6.3 Tripolar Plasma Surge Arrestor................................................................................................................. 35
F.6.4 Bipolar Plasma Surge Arrestor.................................................................................................................. 35
F.6.5 Inductor .................................................................................................................................................... 35
F.6.6 Transient Voltage Suppressor (Transorb) ................................................................................................. 35
F.6.7 Transducer Connection Maximum Operating Voltage Levels: ................................................................. 35
F.6.8 Reset and Clock Maximum Operating Voltage Levels: ............................................................................. 35
F.7 CONNECTOR AND CABLE WIRING..................................................................................................................... 36
F.8 DAISY CHAIN OPERATION ................................................................................................................................. 37
F.9 MAXIMUM 8032-5 (TAN CABLE) CABLE LENGTHS ............................................................................................ 39
F.10 MEMS SENSOR TO MULTIPLEXER WIRING...................................................................................................... 40
FIGURE 1-DIMENSIONS ................................................................................................................................................ 2
FIGURE 2-CHARGE REGULATION CIRCUIT BOARD....................................................................................................... 2
FIGURE 3-DATALOGGER CONNECTIONS ...................................................................................................................... 3

1
1. OVERVIEW
The MICRO-800 Datalogger is designed to support the reading of a large number of Geokon
Vibrating Wire Instruments for various unattended data collection applications through the use of
an internal Geokon Model 8032 Multiplexer. Weatherproof packaging allows the unit to be
installed in field environments where inhospitable conditions prevail. The Nema 4X enclosure
also has a provision for locking to limit access to responsible field personnel.
A basic datalogging system consists of the Campbell Scientific CR800 datalogger, an internal
multiplexer and an External Multiplexer port. Multiplexers expand the system by increments of
16 or 32 channels depending on the instrument type and configuration. The standard model
8025-2 Micro-800 datalogger can support one internal Multiplexer and external Multiplexer. The
External Multiplexer port can also be used to Daisy chain up to eight Multiplexers (please see
8032 Manual for more information). The standard model 8025-4 and 8025-5 dataloggers are
identical to the model 8025-2, but are configured for 32 VW gages only (8025-4) or 32
Thermistors only (8025-5). The standard model 8025-3 Micro-800 datalogger can support two
internal 16 channel Multiplexers and has 32 cable entries.
2. HARDWARE
The controller portion of the MICRO-800 datalogger consists of a Campbell Scientific CR800
Measurement and Control Datalogger. To gain an understanding on the workings and
capabilities of the CR800 it is necessary to read the Overview section of the CR800 Operator’s
Manual. The CR800 Operator’s Manual is available as a pdf file on the Campbell Scientific
Resource CD supplied with the datalogger.
A Campbell Scientific AVW200 Vibrating Wire Interface provides the required excitation and
signal processing for the vibrating wire sensors connected to the Datalogger. The AVW200 uses
spectral analysis to find the resonant frequency of the Vibrating Wire Gage. The AVW200 is
also used to measure the thermistor used in Geokon’s vibrating wire instruments. For complete
specifications of the AVW200 see the AVW200 Instruction Manual on the Campbell Scientific
Resource CD.
A dual-mode battery charging circuit board is used to provide the charging voltage for proper
maintenance of the installed lead acid battery. The circuit board contains fused protected
terminal blocks used to provide a nominal 12VDC supply for devices such as the CR800 and
Model 8032 Multiplexer board. In some cases a Solar Charge Regulator may be used in place of
the dual-mode charger.
The Model 8032 Multiplexer board expands the number of channels that can be read by the
MICRO-800 Datalogger. The channel switching is accomplished by mechanical relays mounted
on the underside of the circuit board and the transducer connections are accomplished by friction
locking terminals. Power, reset and clocking for the multiplexer are supplied by the MICRO-800.
The Model 8032 multiplexer can be configured for 16x4 or 32x2 channels depending on
application. Please see Appendix F for more information on the Geokon Model 8032
multiplexer.
A 12 volt, seven amp hour, lead acid battery is used to provide power for the datalogger. The
battery is provided to supply operating power for a limited period of time should the AC or solar
power, used to maintain the battery, be interrupted. Under normal operating conditions and
proper maintenance, the life expectancy of the battery is approximately five years.

2
3. INSTALLATION
The recommended method of installation involves attaching the enclosure (MICRO-800) to a
fixed structure, such as a wall, in an upright position (Figure 1). Mounting dimensions shown in
inches:
Figure 1 - Dimensions
3.1 Turning on Power
After the Datalogger is installed the charger can be plugged into the AC mains and the On/Off
switch S1 on the Charge Regulation circuit board switched to the “On”position (Figure 2). It is
recommended that the charger be left plugged in at all times (Section 5.1).
Figure 2 - Charge Regulation Circuit Board

3
3.2 Earth Ground
An earth grounding lug is supplied on the exterior of the Micro-800 enclosure to connect the
system to earth ground (Figure 3). A grounding rod can be driven (or other suitable attachment to
earth utilized) to ground the system and provide a path to earth for protection against a lightning
strike or other transient voltage. A 6’to 8’copper grounding rod connected to the Dataloggers
grounding lug with a large gauge wire (12 AWG or larger) is recommended. The earth ground
connection should be made as close to the Datalogger as possible.
3.3 Gages
At this time the vibrating wire sensors can be connected to the multiplexer. Please refer to
Appendix F for the appropriate connection description.
3.4 Communications
Standard communications with the Datalogger is established by connecting the supplied serial
cable to the RS-232 port (Figure 3) and the COM port on a computer, or a USB port on the
computer by using the provided USB to Serial converter cable.
Figure 3 - Datalogger Connections
4. SOFTWARE
The Micro-800 Datalogger is operated by a download file that is generated by a software
program. The software package the MICRO-800 Datalogger may be supplied with is either
MultiLogger software (developed by Canary Systems, Inc., New London, NH) or LoggerNet
software (developed by Campbell Scientific, Logan, Utah). Please refer to the manual supplied
with the software for instructions on installing the software and creating the required download
file for datalogger operation.

4
5. BATTERY MAINTENANCE
5.1 AC Power
The MICRO-800 is supplied with an external AC to DC power supply for maintaining the charge
of the battery and providing power to the Datalogger and peripherals. It is imperative that the
power supply remain connected to the Datalogger as the battery installed in the Datalogger is
only provided as a temporary source of power should the power supply be disconnected or mains
power interrupted. Actual run time solely on battery power will vary for each datalogging
system, depending on the hardware configuration and sensor scan interval. If the battery voltage
drops below 9.6 volts operation of the Datalogger will become erratic as evidenced by
communication problems and possible improper measurements.
5.2 Solar Power
If AC mains power is not available, a properly sized solar panel can be used to provide power to
maintain the charge state of the battery and provide power to the Datalogger and peripherals. The
size of the solar panel is determined by geographic location of the Datalogger, hardware
configuration, and the sensor scan interval.
5.3 External Battery
Additionally, a large external battery, such as a deep cycle marine battery, may be connected to
the Datalogger via the supplied external power cable to provide power to the Datalogger and
peripherals. When this type of battery is connected to the Datalogger the internal Datalogger
battery is automatically disconnected from the system to prevent parasitic drain on the external
battery.
5.4 Battery Replacement
If the internal Lead Acid Battery has failed it is recommend that the unit be returned to the
factory for service by Geokon personnel. However, with skilled personnel and appropriate tools,
it is possible for the user to replace the battery. Consult the factory for information.
5.5 Fuses
There are five fuses on the dual mode charger board of the MICRO-800 (Figure 2). Once
removed and with the power switch off, a fuse can be checked visually and with an ohmmeter. A
gap may be evident (with some discoloration) if the fuse needs replacing. This can be verified by
a high resistance measurement (megaohms) with an ohmmeter. If fuse needs replacing, insert
one of the supplied replacement fuses. If there are no replacement fuses available, consult the
factory or they can be purchased from an electrical supply house. All five fuses are two amp
SLO-BLO 5x20 mm. Consult Appendix D.7 for fuse assignments.