4230 Flow Meter
Section 4 Optional Equipment
4-7
Note
If your flow meter has both the multiple analog output board
and the external analog converter, the internal ports will be
designated Analog Outputs 1, 2, and 3 (depending on how
many are present). The external converter will be designated
either “External” or “Analog Output 0.”
The Multiple Analog Output Board consumes a minimum of 16
mA per output; consequently, the flow meter should be
AC-powered. If you must use battery power, you should consider
the following to extend battery life:
• Use a Solar Panel Battery Charger
• Use a larger battery: either a commercial
deep-cycle/marine type, or an Isco 35 Ampere-hour
lead-acid battery.
• Order and use only one analog output.
• Flow meter program choices also affect power
consumption. Use “minimum” settings, if possible. (See
Section 1 Table 1-5 and Section 5.)
The outputs from the analog output board are electrically iso-
lated from the flow meter and from each other by internal
DC-DC converters. The board uses the opening for the modem
connector for its outputs. Normally, a flow meter will not need
both the analog and modem boards. If your installation does,
however, you should contact the factory.
The analog board terminates in a 6-pin male M/S connector on
the flow meter case. Flow meters built with the analog board
option are also supplied with an output cable. This cable con-
nects to the wiring that runs to the equipment controlled by the
4-20 mA current loop and to the 6-pin M/S connector on the flow
meter. The cable has a 6-pin female M/S connector and is pro-
vided with stripped pigtail ends for convenient wiring.
Table 4-2 Multiple Analog Output Board: Technical
Specifications (each circuit)
Temperature (operating) 0 to 140° F (–18 to 60° C)
Output Accuracy
±0.5% of full-scale
Resolution 0.1% of full-scale (0-20 mA)
Electrical Isolation Isolated from each other and from the
flow meter.
Calibration Factory-calibrated; no further adjust-
ments necessary.
Maximum output distance 1500 feet (457.3 m) using 18 AWG wire.
Current Range (per loop) 0 to 20 mA
Maximum Load (per loop) 750 ohms
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