Campbell CR800 User manual

Campbell CR800 User manual
Need a tough, reliable logger without the bells & whistles?
Campbell Scientific
CR800 Series
w w w. ca m p b e l l s c i . co m . a u
16 Somer Street Hyde Park QLD 4812
tel +61 7 4772 0444 fax +61 7 4772 0555
CR800 Series Measurement & Control System
The CR800 and CR850 dataloggers provide precision measurement capabilities in a rugged, battery-operated package. Both
models consist of measurement electronics encased in a plastic shell and an integrated wiring panel. The standard operating range is -25° to +50°C. An extended range of -55° to +85°C for the CR800 or -30°to +80°C for the CR850 is also available.
Input/Output Connections
Individually configured for
ratiometric resistive bridge,
thermocouple, switch closure, high frequency pulse,
low-level ac, serial sensors,
and more.
CS I/O Port
Connects with AC-powered
PCs and communication
peripherals such as phone,
RF, short-haul, and
multidrop modems.
Removable Power Terminal—
simplifies connection to external
power supply.
• 4 Mbytes* of battery-backed SRAM
• Program execution rate of up to 100 Hz
• CS I/O and RS-232 serial ports
• 13-bit analog to digital conversions
• 16-bit microcontroller with 32-bit internal CPU
• Temperature compensated real-time clock
• Background system calibration for accurate
measurements over time and temperature
• Single DAC used for excitation and measurements
to give ratiometric measurements
• Gas Discharge Tube (GDT) protected inputs
• Data values stored in tables with a time stamp and
record number
• Battery-backed SRAM and clock that ensure data,
programs, and accurate time are maintained while
a CR800-series datalogger is disconnected from
the main power source
• One program-status LED
• Serial communications with serial sensors and
devices supported via I/O port pairs
• PakBus, Modbus, and DNP3 protocols supported
Provides a 9-pin DCE port
for connecting a batterypowered laptop, serial sensors or RS-232 modems.
Model Descriptions
The models differ in their keyboard display. The CR800 uses an
external keyboard display, the CR1000KD, which connects to the
CR800 via its CS I/O port. The CR850 includes an on-board
keyboard display as part of its integrated package.
Operating System/Logic Control
The on-board operating system includes measurement, processing, and output instructions for programming the datalogger. The
programming language, CRBasic, uses a BASIC-like syntax. Measurement instructions specific to bridge configurations, voltage
outputs, thermocouples, and pulse/frequency signals are included.
Processing instructions support algebraic, statistical, and transcendental functions for on-site processing. Output instructions process
data over time and control external devices.
Storage Capacity*
The CR800 series has 2 Mbytes of FLASH memory for the Operating System, and 4 Mbytes of batterybacked SRAM for CPU usage,
program storage, and data storage. Data is stored in a table format.
*Campbell Scientific is increasing the data storage memory from 2 Mbytes to 4 Mbytes. Dataloggers with a serial number greater than or
equal to 3605 will have a 4 Mbyte memory. The 4 Mbyte dataloggers will also have a sticker on the canister stating “4M Memory”.
Campbell Scientific Australia Pty. Ltd (07) 4772 0444
Input Output Terminals
Analog Inputs
Three differential (6 single-ended) channels measure
voltage levels. Resolution on the most sensitive range
is 0.67 μV..
Pulse Counters
Two pulse channels can count pulses from high level
(5 V square wave), switch closure, or low level AC signals.
Switched Voltage Excitations
Two outputs provide precision excitation voltages for
resistive bridge measurements.
Digital I/O Ports
Four ports are provided for frequency measurements,
digital control, and triggering. Three of these ports can
also be used to measure SDM devices. The I/O ports
can be paired as transmit and receive. Each pair has
0 to 5 V UART hardware that allows serial
communications with serial sensors and devices. An
RS232-tologic level converter may be required in some
CS I/O Port
AC-powered PCs and many communication peripherals
connect with the datalogger via this port. Connection
to an AC-powered PC requires either an SC32B or SC-USB
interface. These interfaces isolate the PC’s electrical
system from the datalogger, thereby protecting against
ground loops, normal static discharge, and noise.
RS-232 Port
This non-isolated port is for connecting a battery
powered laptop, serial sensor, or RS-232 modem.
Because of ground loop potential on some
measurements (e.g., low level single-ended measurements), AC-powered PCs should use the CS I/O port
instead of the RS-232 port (see above).
Switched 12 Volt
This terminal provides unregulated 12 V that can be
switched on and off under program control.
Communication Protocols
The CR800 series supports the PakBus, Modbus, and
DNP3 communication protocols. With the PakBus
protocol, networks have the distributed routing intelligence
Campbell Scientific Australia Pty. Ltd (07) 4772 0444
to continually evaluate links. Continually
evaluating links optimizes delivery times and, in the
case of delivery failure, allows automatic switch over to
a configured backup route.
The Modbus RTU protocol supports both floating
point and long formats. The datalogger can act as a
slave and/or master.
The DNP3 protocol supports only long data formats.
The dataloggers are level 2 slave compliant, with some
of the operations found in a level 3 implementation.
Transient Protection
Gas Discharge Tube (GDT) protects the inputs from
electrical transients. The CR800 series is CE compliant
under the European Union’s EMC Directive, meeting
ESD, EMC, Fast Transient standards.
Enclosure/Stack Bracket
A CR800 or CR850 housed in a weather-resistant enclosure
can collect data under extremely harsh conditions. The enclosure protects the datalogger from dust, water, sunlight, or
The 17565 Stack Bracket allows a small peripheral to be
placed under the mounting bracket, thus conserving space.
With the bracket, a CR800 or CR850 can can be attached in
a “horizontal” orientation in an ENC10/12 enclosure (i.e., the
long axis of the CR1000 spanning the short axis of the enclosure).
Power Supplies
Any 12-Vdc source can power the CR800-series dataloggers; a
PS100 or BPALK is typically used. The PS100 provides a 7-Ahr
sealed rechargeable battery that should be connected to a
charging source (either a wall charger or solar panel). The
BPALK consists of eight non-rechargeable D-cell alkaline batteries with a 7.5-Ahr rating at 20°C.
Also available are the BP12 and BP24 battery packs, which
provide nominal ratings of 12 and 24 Ahrs, respectively.
These batteries should be connected to a regulated charging
source (e.g., a CH100 connected to a unregulated solar panel
or wall charger).
The CR800 series
can operate for
up to one year
using the PS100
power supply,
depending on
scan rate, number
of sensors, data
retrieval method,
and external
Communication Options
To determine the best option for an application, consider the accessibility of the site, availability of services (e.g., cellular
phone or satellite coverage), quantity of data to collect, and desired time between data-collection sessions. Some communication options can be combined—increasing the flexibility, convenience, and reliability of the communications.
External Data Storage Device
The CR800 and CR850 can use the SC115 2-GB Flash
Memory Drive to augment onsite data storage or to
transport data between the datalogger and PC.
The NL100 interface enables a CR800-series datalogger
to communicate over a local network or a dedicated Internet
connection via TCP/IP.
Multidrop Interface
The MD485 intelligent RS-485 interface permits a PC to
address and communicate with one or more dataloggers
over the CABLE3CBL cable. Distances up to 4000 feet are
The SC115 is a light-weight, portable instrument that fits in a
pocket allowing easy transport between the datalogger and PC.
CD295 DataView II Display
This two-line, 32-character
LCD displays one real-time
value, a description, and
units. It is typically
mounted in an enclosure lid,
which allows customers
to view the datalogger’s
data on-site without
opening the enclosure.
Campbell Scientific will install a DataView II Display in the enclosure lid. Alternatively, the customer can install the display.
Keyboard Display
Keyboard displays are used to program the datalogger,
manually initiate data transfer, and display data. Both the
CR850’s integrated keyboard display and the CR1000KD can
show 8 lines x 21 characters (64 x 128 pixels). Their keyboard
includes 16 characters. Custom menus are supported allowing customers to set up choices within the datalogger program that can be initiated by a simple “toggle” or “pick list”.
Radio frequency (RF) communications are supported via
narrow-band UHF, narrow-band VHF, spread spectrum, or
meteor burst radios. Line-of-sight is required for all of our RF
Telephone Networks
The CR800 series can communicate with a PC using
landlines, cellular CDMA, or cellular GPRS transceivers.
A voice synthesized modem enables anyone to call
the datalogger via phone and receive a verbal report of
real-time site conditions.
Short Haul Modems
The SRM-5A RAD Short Haul Modem supports communications between the datalogger and a PC via a four-wire
unconditioned line (two twisted pairs).
Satellite Transmitters
Our NESDIS-certifi ed GOES satellite transmitter provides
one-way communications from a Data Collection Platform
(DCP) to a receiving station. We also off er an Argos
transmitter that is ideal for high-altitude and polar
applications and a METEOSAT transmitter for European
Portable Handheld Devices
A user-supplied PDA can be used to collect and display the
datalogger’s data, transfer datalogger programs, graph data
for up to two elements, and transfer the datalogger’s data to
a PC. User-supplied PDAs require either PConnect or
PConnectCE soft ware.
Direct Links
AC-powered PCs connect with the datalogger’s CS I/O port
via an SC32B or SC-USB interface. Th ese interfaces provide
optical isolation. A battery-powered laptop can be attached
to the datalogger’s RS-232 port via an RS-232 cable; no
interface required.
Campbell Scientific Australia Pty. Ltd (07) 4772 0444
Our GOES transmitters are used for stream stage (shown), water
quality, and rainfall applications.
Channel Expansion
4-Channel Low Level AC Module
The LLAC4 is a small peripheral device that allows
customers to increase the number of available low level
AC inputs by using control ports. This module is
often used to measure up to four anemometers, and is
especially useful for wind profiling applications.
Multiplexers increase the number of sensors that can
be measured by a datalogger by sequentially connecting
each sensor to the datalogger. Several multiplexers
can be controlled by a single datalogger. The CR800
and CR850 are compatible with the AM16/32B and
AM25T multiplexers.
Synchronous Devices for Measurement (SDMs)
SDMs are addressable peripherals that expand the
datalogger’s measurement and control capabilities. For
example, SDMs are available to add control ports, analog
outputs, pulse count channels, interval timers, or even a
CANbus interface to the system. Multiple SDMs, in any
combination, can be connected to one datalogger.
Serial Input/ Output
Module is fully
compliant with the
RS-232 standards.
It allows a CR800 or
CR850 to communicate with up to 17
serial devices.
RTMC, a program for displaying the datalogger’s data, is
bundled with LoggerNet and RTDAQ. Customers may also
purchase the RTMCRT and RTMC Web Server clients,
which use forms created in the developer mode of RTMC.
PC400, our mid-level soft ware, supports a variety of
telemetry options, manual data collection, and data
display. For programming, it includes both Short Cut and
the CRBasic program editor. PC400 does not support
combined communication options (e.g., phone-to-RF),
PakBus® routing, and scheduled data collection.
RTDAQ is an ideal solution for industrial and realtime
users desiring to use reliable data collection software over
a single telecommunications medium, and who do not rely
on scheduled data collection. RTDAQ’s strength lies in its
ability to handle the display of high speed data.
LoggerNet is Campbell Scientific’s full-featured
datalogger support soft ware. It is referred to as “full featured” because it provides a way to accomplish almost all
the tasks you’ll need to complete when using a datalogger.
It supports combined communication
options (e.g., phone-to-RF), PakBus® routing, or
scheduled data collection.
Starter Soft ware
Our easy-to-use starter soft ware is intended for first time
users or applications that don’t require sophisticated
communications or datalogger program editing.
SCWin Short Cut generates straight-forward datalogger
programs in four easy steps. PC200W allows customers
to transfer a program to, or retrieve data from a
CR800 or CR850 via a direct communications link.
At you can download starter software at no charge. Our Resource CD also
provides this software as well as PDF versions of our brochures and manuals.
Datalogger Support Software
Our datalogger support software packages provide
more capabilities than our starter software. These software
packages contains program editing, communications,
and display tools that can support an entire datalogger
Campbell Scientific Australia Pty. Ltd (07) 4772 0444
Both LoggerNet and RTDAQ use View Pro to display historical
data in a tabular or graphical format.
The measurement precision, flexibility, long-term reliability, and economical price of the CR800 and CR850 make them
ideal for scientific, commercial, and industrial applications.
Wind Profiling
The CR800 series is used in long-term climatological
monitoring, meteorological research, and routine
weather measurement applications.
Sensors the CR800 series can measure include:
cup, propeller, and sonic anemometers
tipping bucket rain gauges
wind vanes
ultrasonic ranging sensor
thermistors, RTDs and thermocouples
barometric pressure sensors
RH sensors
Our data acquisition systems can monitor conditions at
wind assessment sites, at producing wind farms, and along
transmission lines. The reliability of these systems ensures
data collection, even under adverse conditions. Wide
operating temperature ranges and weatherproof
enclosures allow our systems to operate reliably in
harsh environments.
The CR800 or CR850 makes and records measurements,
controls electrical devices, and can function as PLCs or
RTUs. Because the datalogger has its own power supply
(batteries, solar panels), it can continue to measure and
store data and perform control during power outages.
Typical sensors for wind assessment applications include,
but are not limited to:
• cup, propeller, and sonic anemometers
(up to 10 anemometers can be measured by
using two LLAC4 peripherals)
• wind vanes
• thermistors, RTDs, and thermocouples
• barometers
• pyranometers
Data is output in a choice of units (e.g., wind speed
in miles per hour, meters per second, or knots).
Standard outputs include wind vector averaging,
sigma, theta, and histograms.
Agriculture and Agricultural Research
The versatility of the CR800 and CR850 allows measurement of agricultural processes and equipment in
applications such as:
• plant water research
• canopy energy balance
• machinery performance
• plant pathology
• crop management decisions
• food processing/storage
• frost prediction
• irrigation scheduling
• integrated pest management
Campbell Scientific Australia Pty. Ltd (07) 4772 0444
For turbine performance applications, the CR800
series monitors electrical current, voltage, wattage,
stress, and torque.
Photo courtesy RADTech Ltd. UK
conditions affecting
marine larvae
distribution are
monitored at
Exuma Cay,
A Campbell Scientific datalogging system monitors this
offshore wind farm located between Rhyl and Prestatyn in
North Wales at about 7 to 8 km out to sea.
Air Quality
The CR800 series can monitor and control gas analysers,
particle samplers, and visibility sensors. The datalogger
can also automatically control calibration sequences and
compute conditional averages that exclude invalid data
(e.g., data recorded during power failures or calibration
Vehicle Testing
This versatile, rugged datalogger is ideally suited for
testing cold and hot temperature, high altitude, off highway, and cross-country performance. The CR800
and CR850 are compatible with our SDM-CAN interface,
GPS16X-HVS receiver.
Water Resources/Aquaculture
Our CR800 series is well-suited to remote, unattended
monitoring of hydrologic conditions. Most hydrologic
sensors, including SDI-12 probes, interface directly to
the datalogger.
Vehicle monitoring
includes not only
passenger cars, but
airplanes, locomotives,
helicopters, tractors,
buses, heavy trucks,
drilling rigs, race cars,
and motorcycles.
Soil Moisture
The CR800 and CR850 are compatible with the following
soil moisture measurement technologies:
• Soil moisture blocks are inexpensive sensors that
estimate soil water potential.
• Matric water potential sensors also estimate soil
water potential but are more durable than soil
moisture blocks.
• Time-Domain Reflectometry Systems (TDR) use
a reflectometer controlled by the datalogger to
accurately measure soil water content. Multiplexers
allow sequential measurement of a large number
of probes by one reflectometer.
The CR800-series dataloggers are ideal for monitoring water
quality and level at reservoirs, springs, canals, pipelines, and
culinary sites.
Typical hydrologic measurements:
• Water level is monitored with incremental shaft
encoders, double bubblers, ultrasonic ranging
sensors, resistance tapes, strain gage pressure
transducers, or vibrating wire pressure transducers.
Vibrating wire transducers require an AVW200
series or another Vibrating Wire Interface.
• Self-contained water content reflectometers are
sensors that emit and measure a TDR pulse.
• Tensiometers measure the soil pore pressure of
irrigated soils and calculate soil moisture.
Other Applications
• Wireless sensor/
datalogger networks
• Avalanche forecasting,
snow science, polar,
high altitude
• Well draw-down tests use a pressure transducer
measured at logarithmic intervals or at a rate
based on incremental changes in water level.
• Fire weather
• Ionic conductivity measurements use one of the
switched excitation ports from the datalogger.
• Historic preservation
• Samplers are controlled by the CR800 or CR850 as a
function of time, water quality, or water level.
• Alarm and pump actuation are controlled through
digital I/O ports that operate external relay drivers.
Campbell Scientific Australia Pty. Ltd (07) 4772 0444
• Geotechnical
Data measured by this weather station near Aspen,
Colorado is used in avalanche forecasting.
CR800-Series Specifications
10 ms to 30 min. @ 10 ms increments
3 differential (DF) or 6 single-ended (SE) individually
configured. Channel expansion provided by AM16/32 and
AM25T multiplexers.
RANGES and RESOLUTION: Basic resolution
(Basic Res) is the A/D resolution of a single
conversion. Resolution of DF measurements
with input reversal is half the Basic Res.
Range overhead of ~9% exists on all ranges to guarantee
that full-scale values will not cause over-range.
Resolution of DF measurements with input reversal.
Range (mV)1
Input Referred Noise Voltage
Res (µV)2
Res (µV)
±(0.06% of reading + offset), 0° to 40°C
±(0.12% of reading + offset), -25° to 50°C
±(0.18% of reading + offset), -55° to 85°C(-XT only)
The sensor and measurement noise are not included and
the offsets are the following:
Offset for DF w/input reversal = 1.5·Basic Res + 1.0 µV
Offset for DF w/o input reversal = 3·Basic Res + 2.0 µV
Offset for SE = 3·Basic Res + 3.0 µV
INPUT NOISE VOLTAGE: For DF measurements
with input reversal on ±2.5 mV input range; digital
resolution dominates for higher ranges.
250 µs Integration:
0.34 µV RMS
50/60 Hz Integration:
0.19 µV RMS
MINIMUM TIME BETWEEN VOLTAGE MEASUREMENTS: Includes the measurement time and conversion to
engineering units. For voltage measurements, the CR1000 integrates the input signal for 0.25 ms or a full 16.66 ms or 20 ms line cycle for 50/60 Hz noise rejec-
tion. DF measurements with input reversal incorpo-
rate two integrations with reversed input polarities to reduce thermal offset and common mode errors
and therefore take twice as long.
250 µs Analog Integration:
1/60 Hz Analog Integration:
1/50 Hz Analog Integration:
~1 ms SE
~20 ms SE
~25 ms SE
RANGE AND RESOLUTION: Voltage outputs programmable
between ±2.5 V with 0.67 mV resolution.
ACCURACY: ±(0.06% of setting + 0.8 mV), 0° to 40°C
±(0.12% of setting + 0.8 mV), -25° to 50°C
±(0.18% of setting + 0.8 mV), -55° to 85°C (-XT only)
One independent 12 V unregulated sources switched on
and off under program control. Thermal fuse hold current
= 900 mA @ 20°C, 650 mA @ 50°C, 360 mA @ 85°C.
Offset values are reduced by a factor of 2 when
excitation reversal is used.
The average period for a single cycle is determined by
measuring the average duration of a specified number
of cycles. The period resolution is 192 ns divided by the
specified number of cycles to be measured; the period
accuracy is ±(0.01% of reading + resolution). Any of the 6
SE analog inputs can be used for period averaging. Signal
limiting are typically required for the SE analog channel.
Min Max
Pulse W.
500 mV
10 mV
5 mV
2 mV
10 V
2 V
2 V
2 V
2.5 µs
10 µs
62 µs
100 µs
200 kHz
50 kHz
8 kHz
5 kHz
Input Signal (peak to peak) Range ±2500 mV
±250 mV
±25 mV
±2.5 mV
The signal is centered at the datalogger ground.
The maximum frequency = 1/(Twice Minimum Pulse Width)
for 50% of duty cycle signals.
Two 24-bit inputs selectable for switch closure, high-frequency pulse, or low-level AC.
Minimum Switch Closed Time: 5 ms
Minimum Switch Open Time: 6 ms
Max. Bounce Time: 1 ms open w/o being counted
Input Hysteresis: 12 mV @ 1 Hz
Maximum ac Input Voltage: ±20 V
Minimum ac Input Voltage:
2 switched voltage, active only during measurement, one
at a time.
Offset for DF w/input reversal = 1.5·Basic Res + 1.0 µV
Offset for DF w/o input reversal = 3·Basic Res + 2.0 µV
Offset for SE = 3·Basic Res + 3.0 µV
INPUT CURRENT: ±1 nA typical, ±6 nA max.
@ 50°C; ±90 nA @ 85°C
±(0.04% of voltage reading + offset)/Vx
LOW-LEVEL AC MODE: Internal AC coupling removes
AC offsets up to ±0.5 V.
THERMISTOR (for thermocouple measurements):
±0.3°C, -25° to 50°C
±0.8°C, -55° to 85°C (-XT only)
The sensor and measurement noise are not included and
the offsets are the following:
±16 Vdc max.
INPUT RESISTANCE: 20 Gohms typical
INPUT STATE: high 3.8 to 16 V; low -8.0 to 1.2 V
RATIO ACCURACY : Assuming excitation voltage of
at least 1000 mV, not including bridge resistor error.
when using 60 Hz rejection
Maximum Input Frequency: 250 kHz
Maximum Input Voltage: ±20 V
Voltage Thresholds: Count upon transition from below 0.9 V to above 2.2 V after input filter with
1.2 µs time constant.
OUTPUT VOLTAGES (no load): high 5.0 V ±0.1 V;
low <0.1
MEASUREMENT TYPES: The CR800-series provides
ratiometric measurements of 4- and 6-wire full
bridges, and 2-, 3-, and 4-wire half bridges.
Precise, dual polarity excitation using any of the
3 switched voltage excitations eliminates dc errors.
Sine wave (mV RMS)
Control ports 1 and 3 may be configured for SDI-12 asynchronous communications. Up to ten SDI-12 sensors are
supported per port. It meets SDI-12 Standard version 1.3
for datalogger mode.
PROCESSOR: Renesas H8S 2322 (16-bit CPU with
32-bit internal core)
MEMORY: 2 Mbytes of Flash for operating system;
4 Mbytes of battery-backed SRAM for CPU usage,
program storage and data storage.
SERIAL INTERFACES: CS I/O port is used to inter face with Campbell Scientific peripherals; RS-232
DCE port is for battery-powered computer or non CSI modem connection.
BAUD RATES: Selectable from 300 bps to 115.2 kbps.
ASCII protocol is one start bit, one stop bit, eight
data bits, and no parity.
CLOCK ACCURACY: ±3 min. per year
VOLTAGE: 9.6 to 16 Vdc
1 Hz Scan (60 Hz rejection)
w/RS-232 communication: 19 mA
w/o RS-232 communication: 4.2 mA
1 Hz Scan (250 μs integration)
w/RS-232 communication: 16.7 mA
w/o RS-232 communication: 1 mA
100 Hz Scan (250 μs integration)
w/RS-232 communication: 27.6 mA
w/o RS-232 communication: 16.2 mA
Range (Hz)
1.0 to 20
0.5 to 200
0.3 to 10,000
0.3 to 20,000
4 ports software selectable, as binary inputs or control
outputs. They also provide edge timing, subroutine
interrupts/wake up, switch closure pulse counting, high
frequency pulse counting, asynchronous communications
(UART), SDI-12 communications, and SDM
Inactive: negligible
Active w/o backlight: 7 mA
Active w/backlight: 100 mA
EXTERNAL BATTERIES: 12 Vdc nominal; reverse polarity
DIMENSIONS: 9.5” x 4.1” x 2” (24.1 x 10.4 x 5.1 cm);
additional clearance required for serial cable and sensor leads.
WEIGHT: 1.5 lbs (0.7 kg)
3-years against defects in materials and workmanship.
Electrical specifications are valid over a -25° to +50°C range unless otherwise specified; non-condensing environment required. To maintain electrical
specifications, Campbell Scientific recommends recalibrating dataloggers every two years. We recommend that the system configuration and critical
specifications are confirmed with Campbell Scientific before purchase.
Campbell Scientific Australia Pty. Ltd (07) 4772 0444
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF