Ectaco SENCOR SDN 450 Instrukcja Użytkownika Pobierz pdf (Strona 9)

EGE-Elektronik Spezial-Sensoren GmbH • http://www.ege-elektronik.com

E11011 1.09

Setting instructions

Setting with flow off

1. Install the sensor in the flow duct and switch on the

appliance. Wait for ready state.

2. Carry out the potentiometer adjustment so that the red

LED lights up.

3. When the medium begins to flow, at least one green

LED should light up.

Setting with flow on

1. Install the sensor in the flow duct and subject it to flow.

Switch on the appliance. Wait for ready state.

2. Carry out the potentiometer adjustment so that two

green LEDs light up.

3. If the flow is interrupted, the red LED should light up.

Setting for flow below threshold

This adjustment is only possible if the flow rate lies within

the measuring range of the chosen sensor.

1. Install the sensor in the flow duct and switch on the

appliance. Apply the specified flow. Wait for ready

state.

2. Set the potentiometer so that the red LED just lights

up.

3. When the flow increases, the red LED is extinguished,

the yellow LED lights up and the sensor switches.

Setting for flow higher than threshold

This adjustment is only possible if the flow rate lies within

the measuring range of the chosen sensor.

1. Install the sensor in the flow duct and switch on the

appliance. Apply the specified flow. Wait for ready

state.

2. Set the potentiometer so that the first green LED lights

up.

3. If the flow rate decreases the green LED will extinguish

first, then the yellow LED then the relay drops out and

the red LED will light up.

The switch point for flow velocity is set at the switching

amplifiers SKZ… and SKM… with two potentiometers for

coarse and fine adjustment. If the flow velocities are

higher than the detection limit of the connected sensor,

flow failure or reduction will be displayed once the medi-

um flow velocity has dropped back within the sensor

detection range.

Time delay and limit temperature of medium

Desired values can be set by means of a potentiometer

located on the switching amplifier.

Values are indicated on a scale for SKZ... models. All other

models have a 20 step setting potentiometer. Turning

clockwise increases time or temperature values.

If the set time lag has not yet elapsed, the yellow LED

will remain alight, even though the red LED indicates flow

failure.

Analog output

The SKM 420 GA supplies a current intensity which

depends on the flow speed. The output current range is

defined from 4 mA to 20 mA. The dependence between

flow speed and output current is non-linear. The detection

range is adjusted over two potentiometers: “Range ( )

and “Compensation” ( ). The lowest value (>4 mA, 1.

green LED) is set with the “Compensation” potentiometer

at the smallest flow speed to be monitoring and the high-

est value (20 mA, 5. green LED) is set with the “Range”

potentiometer at the highest flow speed to be monitored.

The graph shows the characteristic lines obtained with the

different settings.

Red:

Flow has been interrupted or the flow rate

has fallen below the specified value. The

"flow" relay has dropped out.

Yellow:

The set flow rate has been reached, the

"flow" relay pulls in.

Green:

The set flow rate has been exceeded. There

is extra flow capacity.

Red:

The set temperature value is reached and the

"temperature" relay has pulled in.

Yellow and Red:

Flow is below the set value. "Flow" relay

remains pulled in until the set switch-off

delay runs out.

LED temperature function

LED functions flow

LED time delay function

SKM 420 GA

EGE

02040

Sensor range [%]

Output current [mA]

60 80 100

Flow Sensors

Technique and application • Setting instructions

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