Appendix A. Specifications; Cr800 Measurement And Control Module; Analog Inputs; Excitation Outputs - Geokon 8025 Instruction Manual

APPENDIX A. SPECIFICATIONS

A.1 CR800 Measurement and Control Module
Power requirements: 9.6 to 16 VDC
Analog measurement current drain: 27.6 mA
Processing current drain: 16.2 mA
Quiescent current drain: .6 mA
Operating temperature: -25 to +50 C
Processor: Hitachi H8S 2322
Memory: 2Mb ROM, 4Mb RAM
Storage capacity: 2,000,000 Final Storage Locations
Real time clock accuracy: 3 minutes per year
Expansion capability: up to 2 x 32 channel multiplexers (single ended)
System battery: 12 V, 7 Ahr lead acid
Communication: RS-232 115200 baud, eight data bits, no parity, one stop bits
A.1.1 Analog Inputs
Configuration: Three differential or six single-ended
Voltage measurement accuracy: 0.06% of FSR for 0 to 40C
Voltage measurement ranges and resolution:
Range
5.0 V
2.5 V
250 mV
25 mV
7.5 mV
2.5 mV
Common mode range: 5 VDC
DC common mode rejection (CMRR): >100 dB
Maximum input voltage: 16 VDC
A.1.2 Excitation Outputs
Configuration: Two switched output channels
Excitation range: 2.5 V
Excitation resolution: 0.67 mV
Excitation accuracy: 0.06% of FSR for 0 C to 40 C
Output current: 25 mA @ 2.5 VDC
A.1.3 Pulse Inputs
Configuration: two 24 bit
Maximum count rate: 16.7x10^6
Maximum input voltage: ±20 VDC
Modes: Switch closure, high frequency pulse, low level AC
Resolution
1330 V
667 V
66.7 V
6.7 V
2 V
.67 V
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