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PROGRAM EXECUTION RATE

10 ms to 30 min. @ 10 ms increments

ANALOG INPUTS

8 differential (DF) or 16 single-ended (SE) individually

configured. Channel expansion provided by AM16/32B

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.

Input Referred Noise Voltage

Input DF Basic

Range (mV)

Res (µV)

±5000 667 1333

±2500 333 667

±250 33.3 66.7

±25 3.33 6.7

±7.5 1.0 2.0

±2.5 0.33 0.67

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.

ACCURACY

±(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 rejection. DF measure-

ments with input reversal incorporate two integra-

tions with reversed input polarities to reduce thermal

offset and common mode errors and therefore take

twice as long.

250 µs Analog Integration: ~1 ms SE

1/60 Hz Analog Integration: ~20 ms SE

1/50 Hz Analog Integration: ~25 ms SE

INPUT LIMITS: ±5 V

DC COMMON MODE REJECTION: >100 dB

NORMAL MODE REJECTION: 70 dB @ 60 Hz

when using 60 Hz rejection

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 Gohms 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

3 switched voltage, active only during measurement,

one at a time.

RANGE AND RESOLUTION: Voltage outputs program-

mable 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)

CURRENT SOURCING/SINKING: ±25 mA

RESISTANCE MEASUREMENTS

MEASUREMENT TYPES: The CR1000 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.

RATIO ACCURACY

: Assuming excitation voltage of

at least 1000 mV, not including bridge resistor error.

±(0.04% of voltage reading + offset)/V

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

Offset values are reduced by a factor of 2 when

excitation reversal is used.

PERIOD AVERAGING MEASUREMENTS

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 16 SE analog inputs can be used for period

averaging. Signal limiting are typically required for the

SE analog channel.

INPUT FREQUENCY RANGE:

Input Signal (peak to peak)

Min. Max

Range Min Max Pulse W. Freq.

±2500 mV 500 mV 10 V 2.5 µs 200 kHz

±250 mV 10 mV 2 V 10 µs 50 kHz

±25 mV 5 mV 2 V 62 µs 8 kHz

±2.5 mV 2 mV 2 V 100 µs 5 kHz

The signal is centered at the datalogger ground.

The maximum frequency = 1/(Twice Minimum Pulse Width)

for 50% of duty cycle signals.

PULSE COUNTERS

Two 24-bit inputs selectable for switch closure, high-

frequency pulse, or low-level AC.

MAXIMUM COUNTS PER SCAN: 16.7x10

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 V.

Input Hysteresis: 12 mV @ 1 Hz

Maximum ac Input Voltage: ±20 V

Minimum ac Input Voltage:

Sine wave (mV RMS) Range (Hz)

20 1.0 to 20

200 0.5 to 200

2000 0.3 to 10,000

5000 0.3 to 20,000

DIGITAL I/O PORTS

8 ports software selectable, as binary inputs or control

outputs. C1-C8 also provide edge timing, subroutine

interrupts/wake up, switch closure pulse counting, high

frequency pulse counting, asynchronous communica-

tions (UART), SDI-12 communications, and SDM

communications.

HIGH-FREQUENCY PULSE MAX: 400 kHz

SWITCH CLOSURE FREQUENCY MAX: 150 Hz

OUTPUT VOLTAGES (no load): high 5.0 V ±0.1 V;

low <0.1

OUTPUT RESISTANCE: 330 ohms

INPUT STATE: high 3.8 to 16 V; low -8.0 to 1.2 V

INPUT HYSTERESIS: 1.4 V

INPUT RESISTANCE: 100 kohms

SERIAL DEVICE/RS-232 SUPPORT: 0 to 5 V UART

SWITCHED 12 V

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.

SDI-12 INTERFACE SUPPORT

Control ports 1, 3, 5, and 7 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.

CE COMPLIANCE

STANDARD(S) TO WHICH CONFORMITY IS

DECLARED: IEC61326:2002

CPU AND INTERFACE

PROCESSOR: Renesas H8S 2322 (16-bit CPU with

32-bit internal core)

PROTOCOLS SUPPORTED: PakBus, Modbus, DNP3,

FTP, HTTP, XML, POP3, SMTP, Telnet, NTCIP, NTP,

SDI-12, SDM

MEMORY: 2 MB of Flash for operating system; 4 MB

of battery-backed SRAM for CPU usage, program

storage and data storage.

CLOCK ACCURACY: ±3 min. per year

PARALLEL INTERFACE: 40-pin interface for attaching

CompactFlash or Ethernet peripherals

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 are selectable

from 300 bps to 115.2 kbps. ASCII protocol is one

start bit, one stop bit, eight data bits, and no parity.

SYSTEM POWER REQUIREMENTS

VOLTAGE: 9.6 to 16 Vdc (reverse polarity protected)

TYPICAL CURRENT DRAIN:

Sleep Mode: ~0.6 mA

1 Hz Scan

(8 diff. meas., 60 Hz rej., 2 pulse meas.)

w/RS-232 communication: 19 mA

w/o RS-232 communication: 4.2 mA

1 Hz Scan

(8 diff. meas., 250 µs integ., 2 pulse meas.)

w/RS-232 communication: 16.7 mA

w/o RS-232 communication: 1 mA

100 Hz Scan

(4 diff. meas., 250 µs integ.)

w/RS-232 communication: 27.6 mA

w/o RS-232 communication: 16.2 mA

CR1000KD CURRENT DRAIN:

Inactive: negligible

Active w/o backlight: 7 mA

Active w/backlight: 100 mA

EXTERNAL BATTERIES: 12 Vdc nominal

PHYSICAL

MEASUREMENT & CONTROL MODULE SIZE:

8.5" x 3.9" x 0.85" (21.6 x 9.9 x 2.2 cm)

CR1000WP WIRING PANEL SIZE: 9.4" x 4" x 2.4"

(23.9 x 10.2 x 6.1 cm); additional clearance required

for serial cable and sensor leads.

WEIGHT: 2.1 lbs (1 kg)

WARRANTY

3-years against defects in materials and workmanship.

CR1000 Speci cations

Electrical speci cations are valid over a -25° to +50°C range unless otherwise speci ed; non-condensing environment required. To maintain electrical

speci cations, Campbell Scienti c recommends recalibrating dataloggers every two years. We recommend that the system con guration and critical

speci cations are con rmed with Campbell Scienti c before purchase.

Campbell Scientiﬁ c, Inc.

Printed January 2010

Campbell Scientic, Inc.

815 W 1800 N

Logan, Utah 84321-1784

(435) 753-2342

www.campbellsci.com

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