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Instruction Manual
2.2 Output Specifications
Voltage Mode: Range: 0 – 10,000 mV
Resolution: 2.5 mV
Maximum Output Current: 30 mA per channel.
Minimum load current: 5 μA if output < 200 mV.
Accuracy (+23°C) ±0.02% of set voltage,
+ (± 2.5 mV).
Accuracy (-25 to +50°C) ±0.13% of set voltage,
+ (± 2.5 mV).
Current Mode: Range: 0 – 20 mA
Resolution: 5 μA
Minimum output current (leakage): 5 μA at +50°C.
Accuracy (+23°C) ±0.02% of full scale range,
+ (± 5 μA).
Accuracy (-25 to +50°C) ±0.1% of full scale range,
+ (± 5 μA).
Minimum voltage drop across the internal current
regulating circuit: 2.5 V at 20 mA current flow.
Maximum voltage into I
d
relative to channel ground:
20 VDC.
When in current mode, the V
o
terminal outputs an
unregulated voltage source at 15 V nominal (±10%),
30 mA maximum load.
Please contact Campbell Scientific for the accuracy
specification on extended temperature tested units.
2.3 Isolation Specifications
Design criteria: The unit has an internal isolation barrier and
components rated to provide signal isolation for
transients up to 1500 VAC (RMS), 2500 VDC
nominal. The isolation is between any output and
the SDM-CVO4 ground connection and between
individual output channels.
Protection components are built-in, which will break
down in a controlled fashion at voltages close to this
limit (see section 4.5, Safety Issues).
Tested isolation: Each channel of each unit is tested for isolation
resistance at 500 VDC. Pass level > 10 MΩ.
Maximum recommended continuous operating voltage:
240 VAC RMS differential between an output and
datalogger ground - providing all issues relating to
local regulations for safe installation and operation
are followed (see section 4.5, safety issues).
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