Campbell Scientific CR5000 CR5000 Measurement and Control Module - Page 24

CR5000 Overview OV5. Specifications Electrical specifications are valid over a -25° to +50°C range unless otherwise specified; testing over -40° to +85°C available as an option, excludes batteries. Non-condensing environment required. Yearly calibrations are recommended to maintain electrical specifications. PROGRAM EXECUTION RATE The CR5000 can measure one channel and store the result in 500 µs; all 40 SE* channels can be measured in 8 ms (5 kHz aggregate rate). ANALOG INPUTS DESCRIPTION: 20 DF* or 40 SE, individually configured. Channel expansion provided through AM16/32, AM416, and AM25T Multiplexers. RANGES, RESOLUTION, AND TYPICAL INPUT NOISE: Basic Resolution (Basic Res) is the A/D resolution of a single conversion. Resolution of DFM* with input reversal is half the Basic Res. Noise values are for DFM with input reversal; noise is greater with SEM.* Input Basic 0 Int. 250 µs Int. 20/16.7 ms Int. Rng (mV) Res (µV) (µV RMS) (µV RMS) (µV RMS) ±5000 167 70 60 30 ±1000 33.3 30 12 6 ±200 6.67 8 2.4 1.2 ±50 1.67 3.0 0.8 0.3 ±20 0.67 1.8 0.5 0.2 ACCURACY†: ±(0.05% of Reading + Offset) 0° to 40°C ±(0.075% of Reading + Offset) -25° to 50°C ±(0.10% of Reading + Offset) -40° to 85°C Offset for DFM w/input reversal = Basic Res +1 µV Offset for DFM w/o input reversal = 2Basic Res + 2 µV Offset for SEM = 2Basic Res + 10 µV MINIMUM TIME BETWEEN MEASUREMENTS: Zero Integration: 250 µs Integration: 16.7 ms Integration: 20 ms Integration: 125 µs 475 µs 19.9 ms 23.2 ms COMMON MODE RANGE: ±5 V DC COMMON MODE REJECTION: >100 dB with input reversal (>80 dB without input reversal) NORMAL MODE REJECTION: 70 dB @ 60 Hz when using 60 Hz rejection SUSTAINED INPUT VOLTAGE WITHOUT DAMAGE: ±16 Vdc INPUT CURRENT: ±2 nA typ., ±10 nA max. @ 50°C INPUT RESISTANCE: 20 GΩ typical ACCURACY OF INTERNAL THERMOCOUPLE REFERENCE JUNCTION: ±0.25°C, 0° to 40°C ±0.5°C, -25° to 50°C ±0.7°C, -40° to 85°C ANALOG OUTPUTS DESCRIPTION: 4 switched voltage; 4 switched current; 2 continuous voltage; switched outputs active only during measurements, one at a time. RANGE: Voltage (current) outputs programmable between ±5 V (±2.5 mA) RESOLUTION: 1.2 mV (0.6 µA) for voltage (current) outputs ACCURACY: ±10 mV (±10 µA) for voltage (current) outputs CURRENT SOURCING: 50 mA for switched voltage; 15 mA for continuous CURRENT SINKING: 50 mA for switched voltage; 5 mA for continuous (15 mA w/selectable option) COMPLIANCE VOLTAGE: ±5 V for switched current excitation RESISTANCE MEASUREMENTS Provides voltage ratio measurements of 4- and 6-wire full bridges, and 2-, 3-, 4-wire half bridges. Direct resistance measurements available with current excitation. Dual-polarity excitation is recommended. VOLTAGE RATIO ACCURACY†: Assumes input and excitation reversal and an excitation voltage of at least 2000 mV. ±(0.04% Reading + Basic Res/4) 0° to 40°C ±(0.05% Reading + Basic Res/4) -25° to 50°C ±(0.06% Reading + Basic Res/4) -40° to 85°C ACCURACY† WITH CURRENT EXCITATION: Assumes input and excitation reversal, and an excitation current, Ix, of at least 1 mA. ±(0.075% Reading + Basic Res/2Ix) 0° to 40°C ±(0.10% Reading + Basic Res/2Ix) -25° to 50°C ±(0.12% Reading + Basic Res/2Ix) -40° to 85°C PERIOD AVERAGING MEASUREMENTS DESCRIPTION: The average period for a single cycle is determined by measuring the duration of a specified number of cycles. Any of the 40 SE analog inputs can be used; signal attenuation and ac coupling may be required. INPUT FREQUENCY RANGE: Input Signal (peak to peak) Rng (mV) Min. Max.1 Min. Max. Pulse W. Freq ±5000 ±1000 ±200 600 mV 100 mV 4 mV 10 V 2.0 V 2.0 V 2.5 µs 200 kHz 5.0 µs 100 kHz 25 µs 20 kHz 1Maximum signals must be centered around datalogger ground. RESOLUTION: 70 ns/number of cycles measured ACCURACY: ±(0.03% of Reading + Resolution) PULSE COUNTERS DESCRIPTION: Two 16-bit inputs selectable for switch closure, high frequency pulse, or low-level ac. MAXIMUM COUNT: 4 x 109 counts per scan SWITCH CLOSURE MODE: Minimum Switch Closed Time: 5 ms Minimum Switch Open Time: 6 ms Maximum Bounce Time: 1 ms open without being counted. HIGH FREQUENCY PULSE MODE: Maximum Input Frequency: 400 kHz Maximum Input Voltage: ±20 V Voltage Thresholds: Count upon transition from below 1.5 V to above 3.5 V at low frequencies. Larger input transitions are required at high frequencies because of 1.2 µs time constant filter. LOW LEVEL AC MODE: Internal ac coupling removes dc offsets up to ±0.5 V. Input Hysteresis: 15 mV Maximum ac Input Voltage: ±20 V Minimum ac Input Voltage (sine wave): (mV RMS) Range (Hz) 20 1.0 to 1000 200 0.5 to 10,000 1000 0.3 to 16,000 DIGITAL I/O PORTS DESCRIPTION: 8 ports selectable as binary inputs or control outputs. OUTPUT VOLTAGES (no load): high 5.0 V ±0.1 V; low < 0.1 V OUTPUT RESISTANCE: 330 Ω INPUT STATE: high 3.0 to 5.3 V; low -0.3 to 0.8 V INPUT RESISTANCE: 100 kΩ EMI and ESD PROTECTION The CR5000 is encased in metal and incorporates EMI filtering on all inputs and outputs. Gas discharge tubes provide robust ESD protection on all terminal block inputs and outputs. The following European standards apply. EMC tested and conforms to BS EN61326:1998. Details of performance criteria applied are available upon request. Warning: This is a Class A product. In a domestic environment this product may cause radio interference in which case the user may be required to correct the interference at the user's own expense. CPU AND INTERFACE PROCESSOR: Hitachi SH7034 MEMORY: Battery-backed SRAM provides 2 Mbytes for data and operating system use with 128 kbytes reserved for program storage. Expanded data storage with PCMCIA type I, type II, or type III card. DISPLAY: 8-line-by-21 character alphanumeric or 128 x 64 pixel graphic LCD display w/backlight. SERIAL INTERFACES: Optically isolated RS-232 9-pin interface for computer or modem. CSI/O 9-pin interface for peripherals such as CSI modems. BAUD RATES: Selectable from 1,200 to 115,200 bps. ASCII protocol is eight data bits, one start bit, one stop bit, no parity. CLOCK ACCURACY: ±1 minute per month SYSTEM POWER REQUIREMENTS VOLTAGE: 11 to 16 Vdc TYPICAL CURRENT DRAIN: 400 µA software power off; 1.5 mA sleep mode; 4.5 mA at 1 Hz (200 mA at 5 kHz) sample rate. INTERNAL BATTERIES: 7 Ahr rechargeable base (optional); 1650 mAhr lithium battery for clock and SRAM backup, 10 years of service typical, less at high temperatures. EXTERNAL BATTERIES: 11 to 16 Vdc; reverse polarity protected. PHYSICAL SPECIFICATIONS SIZE: 9.8" x 8.3" x 4.5" (24.7 cm x 21.0 cm x 11.4 cm) Terminal strips extend 0.4" (1.0 cm). WEIGHT: 4.5 lbs (2.0 kg) with low-profile base; 12.2 lbs (5.5 kg) with rechargeable base WARRANTY Three years against defects in materials and workmanship. *SE(M): Single-Ended (Measurement) *DF(M): Differential (Measurement) † Sensor and measurement noise not included. We recommend that you confirm system configuration and critical specifications with Campbell Scientific before purchase. OV-20