Fluid-components-international FLT93 Nuclear Manuel d'utilisateur télécharger pdf (Page 22)

OPERATION FLT

Series FlexSwitch

22 Fluid Components International LLC

Figure 3-2 5298 Control Circuit Component Locations

Numerical Alarm Set Point Adjustment

The control circuit has two mutually exclusive alarms; they are identiﬁ ed as Alarm No. 1 and Alarm No. 2. Each has an alarm set point adjust-

ment potentiometer and LED indicator. Both alarms can be setup for one of three applications; ﬂ ow, level/interface, or temperature. The

following application speciﬁ c adjustment procedures are generic and can be used for setting either or both alarms. Use Figure 3-2 to help

locate the important setup components (potentiometers, LEDs, etc.)

Air/Gas Flow Applications

1. Remove the instrument’s enclosure cover.

2. Ensure the conﬁ guration jumpers on the control circuit are correct for this application. See Tables 3-3 through 3-6.

3. Check to make sure the input power jumpers match the power to be applied to the instrument. See Table 3-2.

4. Apply power to the instrument. Verify the yellow LED is on and allow the instrument ﬁ fteen minutes to warm-up.

5. Verify the mode switch is in the RUN position.

6. Attach a DC voltmeter to the P1 terminal block with the positive (+) lead to position one and the negative (-) lead to position two.

Note: The terminal block can be unplugged from the control circuit to facilitate easy connections.

7. Establish the normal process ﬂ ow condition and allow the signal to stabilize.

Note: The output signal at connector P1 will vary inversely with changes in the process ﬂ ow rate. The output signal level is relative to

the type of process media being measured and the heater wattage setting. See Figure 3-3.

8. Record the normal ﬂ ow signal value.

Normal Flow Signal = ________ volts DC

9. Follow either the Detecting Decreasing Flow or the Detecting Increasing Flow procedure for each ﬂ ow application alarm.

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 57 58

Pas de commentaire

Fluid-components-international FLT93 Nuclear Manuel d'utilisateur Page 22