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ISOLATED ANALOG OUTPUT OPTION
1.0 GENERAL INFORMATION
The isolated analog output option provides 0 to 10 V, 0 to 20 mA or 4 to 20
mA jumper-sellectable output ranges with 500 V isolation from the analog
ground of the main meter assembly.
Zero and span are each set with push-on jumpers on the circuit board for
coarse ranges plus a fine adjustment pot, which is accessible from the back
of the meter. The coarse-span ranges are such that a span as narrow as
500 counts or as wide as 9999 counts (the right four digits) can produce the
maximum 10 V or 20 mA analog output. A NEGATIVE READING IS
TREATED AS A ZERO READING.
The unit is further jumper-programmable to read either the left four digits (for
displays such as 198800) or the right four digits (for displays such as
001988).
2.0 SPECIFICATIONS
2.1 Power and Signals Supplied by basic meter via internal board
connector (150 mA maximum)
2.2 Environment Same as the basic meter
2.3 Output Control
Analog Voltage Range 0 to 10 V @ 20 mA
Analog Current Ranges 0 to 20 mA, 4 to 20 mA sourcing with 12 V
compliance
Offset Ranges 4 coarse ranges of 0 to 25%, 25 to 50%, 50 to
75%, 75 to 100% with fine adjustment pot
accessible from back of meter
Span Ranges 12 coarse ranges for 500 to 9999 counts (when
the right four digits are selected) to produce the
maximum 10 V or 20 mA output with fine
adjustment pot accessible from back of meter
Turndown Ratio 20:1
Zero Tempco 325 nA or 100µ V/°C
Span Tempco 0.0075% / ¡C
Load Regulation ±0.1%
Full-scale Step Response 50 ms or less, 10 to 90%
Resolution 0.05% of the output span
Accuracy (10 to 40¡C) ±0.1%
Isolation 500 V from analog output to meter ground
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