Omega LV800 manual Delay

LV800

Figure 7

Delay:

A potentiometer is provided for setting the time delay between the time material is "sensed" (Yellow LED on) and the time the relay contact output changes (Red LED on). Units have a 1- turn potentiometer. A clockwise rotation will increase the delay from .25 to 15 seconds. This adjustment minimizes false sig- nals associated with temporary material shifts. The delay between the time material is "not sensed" (Yellows LED off) and the time the relay contact output changes (Red LED off) is fixed at .25 seconds.

Fail-safe:(see Figure 8)

The term fail-safe refers to the output signal condition which occurs with a loss of power to the probe. A switch permits selection of either low or high fail-safe.

High Fail-Safe:The relay will de-energize when material is sensed at high level or with power loss.

Low Fail-Safe:The relay will de-energize when material is below low level or with power loss. Note the designations on the electronics label refer to the relay contact status when no material is sensed and low fail-safe is selected (Relay is de-energized). The designations are reversed when no material is sensed and high fail-safe is selected (Relay is energized).

Figure 9

2)Red LED - Its status describes the "operate/output" condi- tion of the LV800. Illumination indicated the relay is in the "operate/material sensed" condition. Its state is influenced by the time delay setting but not by the fail-safe setting. This LED is aimed at the lens in the cover so it can be seen with the cover on or off.

3)Green LED - Its status indicates “no material sensed” con-

dition of the LV800 in combination with the time delay set- ting. If material has not been sensed for a long enough time (as set by the time delay setting), this LED will be illu- minated. The red and green LEDs should never be illumi- nated at the same time. The green LED's state is not affected by the fail-safe setting. This LED is also aimed at the lens in the cover so that it can be seen with the cover on or off.

Figure 8

Indicators: (See Figure 9)

1)Yellow LED - Its status describes the "sensing" condition of the LV800. Illumination indicated that the amount of capac- itance established by the "Sense Adjust" has been detect- ed. Its status is not affected by the time delay setting of the fail-safe setting. This LED can only be seen when the cover has been removed.

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