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ANALOG OUTPUT OPTION
If you received your meter with the optional analog board installed, you
should not have to enter the trim data as described in Section 12.5.
Your meter converts display readings into an independently-scaled-and-
offset isolated voltage and/or current analog output. Isolation is
accomplished via opto-isolators on the board. Your meter has the capability
of transmitting SIMULTANEOUS voltage and current outputs although when
this is done, the current analog output is not as accurate.
12.1 FEATURES OVERVIEW
1. Precise analog levels are generated from digital code using a proprietary
ASIC chip.
2. Voltage (to 10 V) is available at the same time as current (to 22 mA),
but the total current drawn should not exceed 24 mA.
3. Load resistance for the voltage output can be as low as 500 ohms
(20 mA at 10 V out) when current output is not used.
4. Loop resistance for the current output can be as high as 600 ohms
(12 volts compliance) with negligible current from the voltage output.
5. Both outputs are galvanically isolated from both power and
measurement circuits of the meter: 354 V per IEC spacing, 500 V test.
6. Precision calibration is applied by the meter to either the voltage output
or the current output (but not to both simultaneously). When both
outputs are used simultaneously, the non-calibrated output is stable but
does require external adjustment if fine-trimming is required.
7. Independent, 15-bit resolution OuTput SCale and OFfset (OT.SC.OF)
can convert a wide range of meter readings to the desired current or
voltage output span.
8. The output resolution permits good accuracy for turndown ratios
(offset/span) as high as 100:1.
9. 50° to 104°F (10° to 40°C) accuracy within 0.1% after installation
calibration.
10. 10% to 90% step response time is 50 milliseconds (plus filter delay, if
any, programmed for the analog output).
11. Configurable so that output will track the PEAK or VALLEY
measurement.
Analog Output Options
12
12-1
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