Campbell Scientific Solar1000 Station - Manual (Page 56)

PROGRAM EXECUTION RATE
10 ms to one day @ 10 ms increments
ANALOG INPUTS (SE1-SE16 or DIFF1-DIFF8)
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.
Range (mV) 1 DF Res (µV) 2 Basic 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
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.
ACCURACY 3 :
±(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. The 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
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
ANALOG MEASUREMENT SPEED:
Integra-
tion Type/
Code
Integra-
tion Time
Settling
Time
Total Time 5
SE w/
No Rev
DF w/
Input Rev
250 250 µs 450 µs
~1 ms ~12 ms
60 Hz 4 16.67 ms 3 ms
~20 ms ~40 ms
50 Hz 4 20.00 ms 3 ms
~25 ms ~50 ms
4 AC line noise filter.
5 Includes 250 µs for conversion to engineering units.
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 (Vx1-Vx3)
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.
V
x
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)
V
x
FREQUENCY SWEEP FUNCTION: Switched outputs
provide a programmable swept frequency, 0 to 2500 mv
square waves for exciting vibrating wire transducers.
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.
VOLTAGE RATIO ACCURACY 6 : Assuming excitation
voltage of at least 1000 mV, not including bridge
resistor
error.
±(0.04% of voltage reading + offset)/V
x
6
Accuracy does not include the sensor and measurement
noise. The 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
Offset values are reduced by a factor of 2 when
excitation reversal is used.
PERIOD AVERAGE
Any of the16 SE analog inputs can be used for period
averaging. Accuracy is ±(0.01% of reading + resolu-
tion), where resolution is 136 ns divided by the speci-
fied number of cycles to be measured.
INPUT AMPLITUDE AND FREQUENCY:
Voltage
Gain
Input
Range
(±mV)
Signal (peak to peak) 7 Min
Pulse
Width
(µV)
Max 8
Freq
(kHz) Min. (mV) Max (V)
1 2500 500 10 2.5 200
10 250 10 2 10 50
33 25 5 2 62 8
100 2.5 2 2 100 5
7 With signal centered at the datalogger ground.
8
The maximum frequency = 1/(Twice Minimum Pulse Width)
for 50% of duty cycle signals.
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: 16.7x10 6
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 (C1-C8)
8 ports software selectable, as binary inputs or control out-
puts. Also provide edge timing, subroutine interrupts/wake
up, switch closure pulse counting, high frequency pulse
counting, asynchronous communications (UART), SDI-12
communications, and SDM communications.
HIGH-FREQUENCY 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 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
SWITCHED 12 V (SW-12)
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.
CE COMPLIANCE
STANDARD(S) TO WHICH CONFORMITY IS
DECLARED: IEC61326:2002
COMMUNICATIONS
RS-232 PORTS:
9-pin: DCE port for battery-powered computer or
non-CSI modem connection.
COM1 to COM4: Four independent Tx/Rx pairs on
control ports (non-isolated); 0 to 5 VUART
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 CSI peripherals
SDI-12: Digital control ports 1, 3, 5, and 7 are
individually configured and meet SDI-12 Standard
version 1.3 for datalogger mode. Up to ten SDI-12
sensors are supported per port.
PERIPHERAL PORT: 40-pin interface for attaching
CompactFlash or Ethernet peripherals
PROTOCOLS SUPPORTED: PakBus, Modbus, DNP3,
FTP, HTTP, XML, POP3, SMTP, Telnet, NTCIP, NTP,
SDI-12,
SDM
CPU AND INTERFACE
PROCESSOR: Renesas H8S 2322 (16-bit CPU with
32-bit internal core)
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. Correction
via GPS optional.
SYSTEM POWER REQUIREMENTS
VOLTAGE: 9.6 to 16 Vdc (reverse polarity protected)
EXTERNAL BATTERIES: 12 Vdc nominal
TYPICAL CURRENT DRAIN:
Sleep Mode: 0.7 mA (0.9 mA max.)
1 Hz Sample Rate (1 fast SE meas.): 1 mA
100 Hz Sample Rate (1 fast SE meas.): 16.2 mA
100 Hz Sample Rate (1 fast SE meas. w/RS-232
communication): 27.6 mA
Optional Keyboard Display On (no backlight): add
7 mA to current drain
Optional Keyboard Display On (backlight on): add
100 mA to current drain
PHYSICAL
DIMENSIONS: 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 Specifi cations
Electrical specifi cations are valid over a -25° to +50°C range unless otherwise specifi ed; non-condensing environment required. To maintain electrical
specifi cations, Campbell Scientifi c recommends recalibrating dataloggers every two years. We recommend that the system confi guration and critical
specifi cations are confi rmed with Campbell Scientifi c before purchase.