Aalborg GFC Manual do Utilizador descarregar pdf (Página 8)

FIGURE 2-2, POTENTIOMETER AND JUMPER LOCATIONS

2.2.1 Valve Control Configuration

There are three basic valve control options.

(a) LOCAL or REMOTE control.

(b) 0 to 5 VDC or 4 to 20 mA setpoint signal -

*Note: this only applies for the REMOTE control configuration;

When active, the 2% cutoff will shut off the power to the valve when a setpoint of

less than 2% of the full scale flow range is set. Figure 2-2 shows the jumper con-

figurations for the three basic valve control options.

The factory default jumper settings are: LOCAL control, 2% cutoff off, and 0 to 5 VDC.

FIGURE 2-3, VALVE CONTROL CONFIGURATION JUMPERS

2.2.2 Remote LCD Readouts

GFC Mass Flow Controllers are available with optional remote reading LCD dis-

plays supplied with a three foot long wire to accommodate most applications. This

configuration includes the upper block element which serves as the LCD readout

mounting. Special lengths of remote extension wiring (up to 9.5 feet [3 meters])

are available on request.

FUNCTION NJ1A NJ1B NJ1C NJ1D NJ1E

0 to 5 VDC

4 to 20 mA

2 - 3

1 - 2

5 - 6

4 - 5

8 - 9

7 - 8

local

remote

11 - 12

10 - 11

2% cutoff on

2% cutoff off

13 - 14

14 - 15

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 39 40

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Aalborg GFC Manual do Utilizador Página 8