EVCO EC4432 User Manual

Page 2

EC 4-432E 3/95

MOUNTING

For a proper mounting, take note of the attached indications; be sure that the conditions of use (voltage of power-

supply, environment temperature, humidity) are inside the instrument working limits.

Do not overload the relay-outputs, keep inside the indicated limits.

Voltage at terminal 15 is not stabilized. If the transducer is powered by the instrument, it should be verified that in all

working conditions, especially for high humidity values, the voltage on the transducer does not drop below the

minimum working value, in order to guarantee a correct measure.

WARNING : The instrument is not protected from overloads; so it is necessary to give the outputs the suitable

protections; the power-supply is protected by an internal fusible.

CONFIGURATION

There are two levels of configuration (LEVEL 2 is protected by PASSWORD):
Level 1
Push

and

at the same time, for 4 seconds at least :
the symbol "PA" appear on the display

Push

to select the parameter to modify at LEVEL 1

Push

and

to modify the selected parameter.

Level 2

From LEVEL 1 push

to selected the parameter "PA"

Push

and

to set "-19"

Push

and

at the same time for 4 seconds at least :
the first parameter of LEVEL 2 will appear on the display.

Push

to selected the parameter to modify at LEVEL 2

Push

and

to modify the selected parameter.

How to leave "Configuration"

Push

and

at the same time for 4 seconds at least or wait for 50 seconds

without operating on the keyboard, or stop and restart the instrument.

USE

When not working the instrument displays the value read by the probe. Push

to the display the actual Setpoint

value; the led "out 1" will flash;

to change the first Setpoint value push

and

If the parameter rA5 has value 1, the first Setpoint can not be modified

. After changing, release the key

as last.

For the two seconds following the release of the key

,the led "out 1" flashes to indicate that pushing

again we

enter display and changing of the second Setpoint: if no key gets pushed within two seconds, the instrument returns
to the basic status. To change the value of the second Setpoint, push

again, within two seconds since the first

release of the same key, afterwards operate like for the first Setpoint; the led "out 2" will flash.

If parameter rB5 has value 1, the second Setpoint can not be changed

. If the parameter –/0 has value 3 the second

Setpoint does not exist.

SIGNALS AND ALARMS
The led "out 1" (or "out 2"), when lighted, indicates that the output 1 (or the output 2) is activated; if it is flashing it

indicates that the instrument is in phase of delay-temporisation at the output.

"E0" flashing on the display means one of the following defects: defective probe or wrong connection (in case of not

connected probe, the indication "EO" will appear if the parameter is /0=30 (4-20 mA) and "0" if the parameter is /

0=31 (4-20 mA)).

"E2" flashing on the display : failure of memorised configuration-data; try to switch the power-supply off, and then,

switch it on.

If the display indicates a proper value alternated to the signal "AL 1" (or "AL 2"), it means that the relative humidity read by

the probe is off the limits previously set in parameters "AA1" and/or "Ab1".