Calibration - Presys DMY-2015 Technical Manual

Presys  Instruments
Alarm outputs 1 and 2
Outputs 1 and 2 are used as alarms when the optional modules corresponding
to connectors MOD 3 and MOD 4 are installed. There are two types of alarm output
available: SPDT relay and open collector voltage. The Alarm output type and the
optional module correspondence are shown in table 9.
Alarm output type
SPDT Relay
Open collector voltage

4.4 - Calibration

DMY-2015 Indicator is accurately calibrated in factory and doesn't need
periodic calibration in normal conditions. When calibration is required, follow this
procedure below.
Disconnect the process signals of I/O terminals.
Before calibrating the instrument, keep it turned on for at least 30 minutes for
warm up.
The accuracy and precision of the calibrator used for generating references
must be at least twice as good as the specifications of the Indicator.
The following tables list the references related to the type of input to be
calibrated. The left column shows the mnemonics presented on the display during
the calibration process.
Before performing the calibration, enter level 5 of Calibration. The calibration
level has a password system which avoids someone to enter this level accidentally
and damage any calibration parameter. The password for entering this level is
number 5.
Once the correct password is provided, select the input type to be calibrated.
Choose the channel to be calibrated by pressing ENTER. The display shows the
mnemonics related to the references required for the calibration process. The
references must be applied before the corresponding mnemonic is shown on display.
When the reference is stable, start the calibration by pressing ENTER. At this
moment the Indicator begins the calibration process while the mnemonic CAL blinks
on the display.
While the display is blinking the reference must be connect to the input
channel you want to calibrate.
When the display stops blinking and presents the mnemonic corresponding to
the reference, the calibration process of the first calibration point will be finished.
Change to the next reference and press DOWN to select another point.
Between any two calibration points wait 1 minute at least. After this time is elapsed,
press ENTER to start calibrating this point.
Maintenance
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Optional module code
MALRE - 20
MSD - 20
Table 9 - Alarm output types
DMY - 2015