Teledyne 4220 mA Output Interface Specifications, Internal Multiple, Analog Output Board

4220 Flow Meter

Section 5 Options and Accessories

Table 5-1 4-20 mA Output Interface Specifications

Adjustments / Calibration

Factory-calibrated; when used within range, no adjustment needed,

Maximum Distance

1,500 ft. (457.3 m) using 18 AWG wire.

5.3.2 Internal Multiple	For those needing more than one analog output, Teledyne Isco
Analog Output Board	offers the Multiple Analog Output Board, which is installed
	inside the flow meter. This board provides from one to three iso-
	lated analog outputs. You can order the board with three, two, or
	one circuit installed. You must specify this when the flow meter
	is ordered. The board is compatible with the existing external
	4-20 mA output box (60-1784-039). A flow meter can use either
	the internal board, the external box, or both, for a maximum
	number of four analog outputs.

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 only one analog output.

•Flow meter program choices also affect power consumption. Use “minimum” settings, if possible. (See Section 1, Table 1-5and 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.

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