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PRESYS
| Instruments
Outputs 3 and 4 as Logic outputs
Outputs 3 and 4 function with only two states when the corresponding optional
module is plugged to connections MOD 3 and MOD 4, respectively. There are three
possible types of analog outputs: the SPDT relay, the solid-state relay and the open
collector voltage. The relationship between the type of logic output and the
corresponding optional module is established on table 5.
Analog output type
SPDT relay
Solid-state relay
Open collector voltage
4.4 - Calibration
The DCY-2050 and 2051 controllers are accurately calibrated at factory and will
not require periodic recalibration under normal conditions. If, for any reason, a
recalibration is required, follow the procedure described below.
Disconnect the process signals from the controller I/O terminals.
Prior to carrying out the calibration allow the instrument to warm up for at least 30
minutes to ensure that it reaches stable operating conditions.
This section contains basically two parts: input calibration and output calibration.
Input calibration
The input calibration describes the procedure to be followed when calibrating
input 1 and input 2.
The accuracy and precision of the reference generating calibration equipment
should be, at least twice as good as the controllers specifications.
References on the following tables relate to the input type to be calibrated. The
column on the right on these tables shows the mnemonics displayed in the calibration
process.
Always check that the internal jumper configuration correctly matches the input
type to be calibrated.
Prior to carrying out the calibration procedure, access Calibration level 5. The
calibration level is provided with a password system which prevents the inadvertent
access to this level and the likelihood of damaging the controllers calibration parameters.
The access password to this calibration level is number 5.
Once the calibration password is acknowledged, select the input type to be
calibrated within the option ENTR. Select the channel to be calibrated by pressing
ENTER. The display will show the mnemonics corresponding to the references required
by the calibration process. Those references should be entered prior to the display of the
corresponding mnemonic and the calibration procedure is started by pressing ENTER.
At this time the Indicator starts the calibration procedure and the display will flash the
mnemonic CAL.
Table 5 - Logic output type for outputs 3 and 4
DCY-2050 and DCY-2051
Optional module code
MALRE - 20
MALRS - 20
MSD - 20
Maintenance
Page 56
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