CR1000 Measurement and Control Datalogger

CR1000 Measurement and Control Datalogger
CR1000 Measurement and Control Datalogger
The CR1000 provides precision measurement capabilities in a rugged, battery-operated package. It consists of a measurement and control module and a
wiring panel. Standard operating range is -25° to +50°C; an optional extended range of -55° to +85°C is available.
Input/Output Terminals—
Individually configured
for ratiometric resistive
bridge, thermocouple,
switch closure, high frequency pulse, low-level ac,
serial sensors, and more.
Removable Power Terminal—simplifies
connection to external power supply.
{
CS I/O Port—connects with
AC-powered PCs and communication peripherals such
as phone, RF, short-haul, and
multidrop modems.
Benefits and Features
4 MB memory*
Program execution rate of up to 100 Hz
CS I/O and RS-232 serial ports
13-bit analog to digital conversions
16-bit H8S Renesas Microcontroller with 32-bit internal CPU
architecture
Temperature compensated real-time clock
Background system calibration for accurate measurements over
time and temperature changes
Single DAC used for excitation and measurements to give ratio
metric measurements
Gas Discharge Tube (GDT) protected inputs
Battery-backed SRAM memory and clock ensuring data, programs,
and accurate time are maintained while the CR1000 is disconnected from its main power source
Serial communications with serial sensors and devices supported
via I/O port pairs
PakBus®, Modbus, DNP3, TCP/IP, FTP, and SMTP protocols supported
RS-232—provides
a 9-pin DCE port
for connecting a
battery-powered
laptop, serial
sensors or RS-232
modems.
Peripheral Port—allows data to be
stored on a CompactFlash card and/or
supports Ethernet communications.
Measurement and Control Module
The module measures sensors, drives direct communications and
telecommunications, reduces data, controls external devices, and
stores data and programs in on-board, non-volatile storage. The
electronics are RF shielded and glitch protected by the sealed, stainless steel canister. A battery-backed clock assures accurate timekeeping. The module can simultaneously provide measurement and
communication functions. The on-board, BASIC-like programming
language supports data processing and analysis routines.
Wiring Panel
The CR1000WP is a black, anodized aluminum wiring panel that is
compatible with all CR1000 modules. The wiring panel includes
switchable 12 V, redistributed analog grounds (dispersed among
analog channels rather than grouped), unpluggable terminal block
for 12 V connections, gas-tube spark gaps, and 12 V supply on pin 8
to power our COM-series phone modems and other peripherals. The
control module easily disconnects from the wiring panel allowing
field replacement without rewiring the sensors. A description of the
wiring panel’s input/output channels follows.
*Originally, the standard CR1000 had 2 MB of data/program storage, and an optional version, the CR1000-4M, had 4 MB of memory. In September 2007,
the standard CR1000 started having 4 MB of memory, making the CR1000-4M obsolete. Dataloggers that have a module with a serial number greater
than or equal to 11832 will have a 4 MB memory. The 4 MB dataloggers will also have a sticker on the canister stating “4M Memory”.
Analog Inputs
Eight differential (16 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
Three outputs provide precision excitation voltages for resistive
bridge measurements.
Digital I/O Ports
Eight 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 RS-232-to-logic level
converter may be required in some cases.
CS I/O Port
AC-powered PCs and many communication peripherals connect
with the CR1000 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).
Communication Protocols
The CR1000 supports the PakBus, Modbus, DNP3, TCP/IP, FTP, and
SMTP communication protocols. With the PakBus protocol, networks
have the distributed routing intelligence 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.
The TCP/IP, FTP, and SMTP protocols provide TCP/IP functionality
when the CR1000 is used in conjunction with an NL240, NL201,
NL115, or NL120. Refer to the CR1000 manual for more information.
Power Supplies
Typically, the CR1000 is powered with a PS200, PS150, or BPALK. The
PS200 and PS150 provide a 7 Ah 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 Ah rating at 20°C.
Also available are the BP12 and BP24 battery packs, which provide
nominal ratings of 12 and 24 Ah, respectively. These batteries should
be connected to a regulated charging source (e.g., a CH200 or CH150
connected to a unregulated solar panel or wall charger).
Peripheral Port
One 40-pin port interfaces with the NL115 Ethernet Interface and
CompactFlash Module, the NL120 Ethernet Interface, or the CFM100
CompactFlash® Module.
Switched 12 Volt
This terminal provides unregulated 12 V that can be switched on and
off under program control.
Storage Capacity
The CR1000 has 2 MB of flash memory for the Operating System, and
4 MB of battery-backed SRAM for CPU usage, program storage, and
data storage. Data is stored in a table format. The storage capacity
of the CR1000 can be increased by using a CompactFlash card.
Enclosure/Stack Bracket
A CR1000 housed in a weather-resistant enclosure can collect data
under extremely harsh conditions. The 28960 Enclosure Stack
Mounting Kit allows a small peripheral to be placed under the
mounting bracket, thus conserving space.
The PS200 (above) and CH200 can monitor charge input voltage, battery
voltage, on-board temperature, battery current, and load current.
CR1000 Specifications
Electrical specifications are valid over a -25° to +50°C, non-condensing environment, unless otherwise specified. Recalibration recommended every three
years. Critical specifications and system configuration should be confirmed with Campbell Scientific before purchase.
PROGRAM EXECUTION RATE
VX FREQUENCY SWEEP FUNCTION: Switched outputs provide a programmable swept frequency, 0 to 2500 mv square
waves for exciting vibrating wire transducers.
10 ms to one day @ 10 ms increments
ANALOG INPUTS (SE1-SE16 or DIFF1-DIFF8)
8 differential (DF) or 16 single-ended (SE) individually configuredinput channels. Channel expansion provided by optional
analog multiplexers.
RANGES and RESOLUTION: Basic resolution (Basic Res)
is the A/D resolution of a single A/D conversion. A DIFF measurement with input reversal has better (finer) resolution by
twice than Basic Res.
Range (mV)1
DF Res (µV)2
±5000
±2500
±250
±25
±7.5
±2.5
667
333
33.3
3.33
1.0
0.33
Basic Res (µV)
1333
667
66.7
6.7
2.0
0.67
PERIOD AVERAGE
Any of the 16 SE analog inputs can be used for period averaging. Accuracy is ±(0.01% of reading + resolution), where
resolution is 136 ns divided by the specified number of cycles
to be measured.
INPUT AMPLITUDE AND FREQUENCY:
Input
Voltage Range
Gain (±mV)
1
250
10
25
33
7.5
100
2.5
1
Range overhead of ~9% on all ranges guarantees that
full-scale values will not cause over range.
2
Resolution of DF measurements with input reversal.
ACCURACY3:
±(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)
3
Accuracy does not include the sensor and measurement
noise. Offsets are defined as:
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
ANALOG MEASUREMENT SPEED:
Total Time4
Integration
Type/Code
250
60 Hz5
Integration Time
250 µs
16.67 ms
Settling
Time
450 µs
3 ms
50 Hz5
20.00 ms
3 ms
SE w/
No Rev
~1 ms
~20 ms
~25 ms
4
DF w/
Input Rev
~12 ms
~40 ms
~50 ms
Includes 250 µs for conversion to engineering units.
5
AC line noise filter.
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
INPUT LIMITS: ±5 Vdc
DC COMMON MODE REJECTION: >100 dB
NORMAL MODE REJECTION: 70 dB @ 60 Hz when using
60 Hz rejection
INPUT VOLTAGE RANGE W/O MEASUREMENT
CORRUPTION: ±8.6 Vdc max.
SUSTAINED INPUT VOLTAGE W/O DAMAGE: ±16 Vdc max.
INPUT CURRENT: ±1 nA typical, ±6 nA max. @ 50°C;
±90 nA @ 85°C
INPUT RESISTANCE: 20 GΩ typical
ACCURACY OF BUILT-IN REFERENCE JUNCTION
THERMISTOR (for thermocouple measurements):
±0.3°C, -25° to 50°C
±0.8°C, -55° to 85°C (-XT only)
ANALOG OUTPUTS (VX1-VX3)
3 switched voltage, sequentially active only during measurement.
RANGE AND RESOLUTION:
Channel
Range
Resolution
Current
Source/Sink
(VX 1–3)
±2.5 Vdc
0.67 mV
±25 mA
ANALOG OUTPUT ACCURACY (VX):
±(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)
Signal (peak to peak)
Min.
(mV) 6
500
10
5
2
Max
(V) 7
10
2
2
2
Min
Pulse
Width
(µV)
2.5
10
62
100
Max8
Freq
(kHz)
200
50
8
5
LOW FREQUENCY MODE MAX: <1 kHz
HIGH-FREQUENCY MODE MAX: 400 kHz
SWITCH-CLOSURE FREQUENCY MAX: 150 Hz
EDGE TIMING RESOLUTION: 540 ns
OUTPUT VOLTAGES (no load): high 5.0 V ±0.1 V; low <0.1
OUTPUT RESISTANCE: 330 Ω
INPUT STATE: high 3.8 to 16 V; low -8.0 to 1.2 V
INPUT HYSTERESIS: 1.4 V
INPUT RESISTANCE: 100 Ω with inputs <6.2 Vdc
220 Ω with inputs ≥6.2 Vdc
SERIAL DEVICE/RS-232 SUPPORT: 0 TO 5 Vdc UART
SWITCHED 12 VDC (SW-12)
1 independent 12 Vdc unregulated source is switched on and
off under program control. Thermal fuse hold current = 900 mA
at 20°C, 650 mA at 50°C, 360 mA at 85°C.
CE COMPLIANCE
6
Signal centered around Threshold (see PeriodAvg() instruction).
7
With signal centered at the datalogger ground.
8
STANDARD(S) TO WHICH CONFORMITY IS DECLARED:
IEC61326:2002
The maximum frequency = 1/(twice minimum pulse width)
for 50% of duty cycle signals.
COMMUNICATIONS
RATIOMETRIC MEASUREMENTS
MEASUREMENT TYPES: Provides ratiometric resistance
measurements using voltage excitation. 3 switched voltage
excitation outputs are available for measurement of 4- and
6-wire full bridges, and 2-, 3-, and 4-wire half bridges.
Optional excitation polarity reversal minimizes dc errors.
RATIOMETRIC MEASUREMENT ACCURACY:9,10, 11
±(0.04% of Voltage Measurement + Offset)
9
Accuracy specification assumes excitation reversal for
excitation voltages < 1000 mV. Assumption does not include
bridge resistor errors and sensor and measurement noise.
10
Estimated accuracy, ∆X (where X is value returned from the
measurement with Multiplier = 1, Offset = 0):
BrHalf() instruction: ∆X = ∆V1/VX
BrFull() instruction ∆X = 1000 ∆V1/VX, expressed as mV V−1.
∆V−1 is calculated from the ratiometric measurement
accuracy. See Resistance Measurements Section in the
manual for more information.
11
Offsets are defined as:
Offset for DIFF w/input reversal = 1.5 Basic Res + 1.0 µV
Offset for DIFF w/o input reversal = 3 Basic Res + 2.0 µV
Offset for SE = 3 Basic Res + 3.0 µV
Excitation reversal reduces offsets by a factor of two.
PULSE COUNTERS (P1-P2)
2 inputs individually selectable for switch closure, high frequency
pulse, or low-level ac. Independent 24-bit counters for each input.
MAXIMUM COUNTS PER SCAN: 16.7x106
SWITCH CLOSURE MODE:
Minimum Switch Closed Time: 5 ms
Minimum Switch Open Time: 6 ms
Max. Bounce Time: 1 ms open w/o being counted
HIGH-FREQUENCY PULSE MODE:
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.
LOW-LEVEL AC MODE: Internal ac coupling removes ac
offsets up to ±0.5 Vdc.
Input Hysteresis: 12 mV RMS @ 1 Hz
Maximum ac Input Voltage: ±20 V
Minimum ac Input Voltage:
Sine Wave (mV RMS)
Range(Hz)
20
200
2000
5000
1.0 to 20
0.5 to 200
0.3 to 10,000
0.3 to 20,000
DIGITAL I/O PORTS (C1-C8)
8 ports software selectable, as binary inputs or control outputs. Provide on/off, pulse width modulation, edge timing,
subroutine interrupts / wake up, switch closure pulse counting, high frequency pulse counting, asynchronous communications (UARTs), and SDI-12 communications. SDM communications are also supported.
RS-232 PORTS:
DCE 9-pin: (not electrically isolated) for computer connection or connection of modems not manufactured
by Campbell Scientific.
COM1 to COM4: 4 independent Tx/Rx pairs on control
ports (non-isolated); 0 to 5 Vdc UART
Baud Rates: selectable from 300 bps to 115.2 kbps.
Default Format: 8 data bits; 1 stop bits; no parity
Optional Formats: 7 data bits; 2 stop bits; odd, even parity
CS I/O PORT: Interface with telecommunications peripherals
manufactured by Campbell Scientific.
SDI-12: Digital control ports C1, C3, C5, and C7 are individually
configured and meet SDI-12 Standard v 1.3 for datalogger
mode. Up to 10 SDI-12 sensors are supported per port.
PERIPHERAL PORT: 40-pin interface for attaching
CompactFlash or Ethernet peripherals
PROTOCOLS SUPPORTED: PakBus, AES-128 Encrypted
PakBus, Modbus, DNP3, FTP, HTTP, XML, HTML, POP3,
SMTP, Telnet, NTCIP, NTP, Web API, SDI-12, SDM.
SYSTEM
PROCESSOR: Renesas H8S 2322 (16-bit CPU with 32-bit
internal core running at 7.3 MHz)
MEMORY: 2 MB of flash for operating system; 4 MB of
battery-backed SRAM for CPU usage and final data
storage; 512 kB flash disk (CPU) for program files.
REAL-TIME CLOCK ACCURACY: ±3 min. per year.
Correction via GPS optional.
REAL-TIME CLOCK RESOLUTION: 10 ms
SYSTEM POWER REQUIREMENTS
VOLTAGE: 9.6 to 16 Vdc
INTERNAL BATTERIES: 1200 mAh lithium battery for clock and
SRAM backup that typically provides three years of backup
EXTERNAL BATTERIES: Optional 12 Vdc nominal alkaline
and rechargeable available. Power connection is reverse
polarity protected.
TYPICAL CURRENT DRAIN at 12 Vdc:
Sleep Mode: < 1 mA
1 Hz Sample Rate (1 fast SE meas.): 1 mA
100 Hz Sample Rate (1 fast SE meas.): 6 mA
100 Hz Sample Rate (1 fast SE meas. w/RS-232
communication): 20 mA
Active external keyboard display adds 7 mA (100 mA
with backlight on).
PHYSICAL
DIMENSIONS: 23.9 x 10.2 x 6.1 cm (9.4 x 4 x 2.4 in);
additional clearance required for cables and leads.
MASS/WEIGHT: 1 kg / 2.1 lb
WARRANTY
3 years against defects in materials and workmanship.
Campbell Scientific, Inc. | 815 W 1800 N | Logan, UT 84321-1784 | (435) 227-9000 | www.campbellsci.com
USA | AUSTRALIA | BRAZIL | CANADA | CHINA | COSTA RICA | ENGLAND | FRANCE | GERMANY | SOUTH AFRICA | SPAIN
© 2004, 2014
Campbell Scientific, Inc.
November 12, 2014
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