Sutron 8310 - Page 158

Sutron Corporation 8310 & 7310 Users Manual 8800-1125Rev. 2.7 (BETA) 4/16/2014 pg. 158
Concepts
Connecting sensors is as simple as connecting the wires from the sensor to the terminal strip. As
a standard practice you should test each new application (sensor connections and setup) on the
bench prior to installing it in the field. Then create a complete setup sheet and wiring diagram
that shows where each sensor wires is attached to the 8310. This will take the guesswork out of
connecting the sensors in the field.
Analog Inputs
Number Available
8
Input Range
-0.1 to 5V with respect to ground, single
ended or differential
Single Ended Range
0-5 V, + 78 mV (with respect to ground)
Differential Range
+2.5V, + 78 mV ( + input with respect to –
input)
CMRR
120 dB typ
Input Impedance
> 10 Gohm typ
Accuracy:
0.002% of 5V typ 0.003% of 78mV typ HiGain
0.03% of 19.5mV typ x128Gain
Temp Coefficient
5 ppm/C typ
Ratio Accuracy
Limited by A/D resolution
Noise floor
RMS noise typically < 1bit on 78mV scale and
above
Excitation
2.5V (up to 50 mA)
Protection
Multistage input protection including spark
gaps.
4-20 mA
Precision load available for 2 analog
channels. Loop source voltage provided by
switched battery voltage
Digital Inputs
Number Available
4
Intended for tipping bucket, frequency or
discrete inputs (quadrature takes 2 inputs)
Maximum frequency
8kHz, minimum pulse width 100
microseconds
Input range
0-5V (100KOhm pull-up to +5V provided)
Accuracy
+0.07% @200 ms sample interval
+0.03% @500 ms sample interval
+0.01% @1000 ms sample interval
Max Quadrature Frequency
4kHz
Digital Outputs
Number Available
2
Output type
Open collector with 100 ohm current
limiting resistor, 100 mA, 15V max
Switched Voltages
Number Available
2
Types
Switched battery, Switched +5