PC3000 Complete Installation guide iss 12 - Elektro-Trading

4 Channel Analogue Output Module
10-6
As an example, say that it is required to recalibrate an output at 9.5V (95% on 10V
range). The parameter Hw_Cal_Hi_P will already contain the value, 95. If this value
is re-entered calibration will not occur. The value must be changed to say 95.1 and
then changed back to 95 in order for the data to be transmitted to the module. All
calibration data must be treated accordingly.
Step-by-step calibration guide
The actions which should be performed for calibration are described. They are
described in terms of the Function Block parameters associated with calibration and
are intended to be independent of the Programming Station used to perform the
calibration.
Outputs are calibrated on the full scale ranges (-10V to +10V and -20mA to +20mA)
only.
The following calibration values are recommended:
Output range Low point High point
-10V to +10V -90% (-9V) 90% (9V)
-20mA to +20mA -90% (-18mA) 90% (18mA)
(1) Select Output_type for the current or voltage mode to be calibrated.
(2) Change the parameter Cal_Mode from Run ( 0) to HCal_Lo ( 4).
(3) Select Hw_Cal_Lo_P, and enter a value at or near zero corresponding to the
percentage of full scale required for the low calibration point e.g. -90%. The
module will output its value corresponding to the percentage entered as the
Hw_Cal_Lo_P
(4) Read the value displayed by the DVM and record this value. As an
example, assume the meter reads -8.97 at the calibration point -90%.
Convert this to the percentage of full scale, in this case, -89.7%. Enter this
as the value of the Hw_Cal_V. The voltage read on the meter will now
equal the requested value e.g. -9.0V.
(5) Change the parameter Cal_Mode from Run to HCal_Hi (5).
(6) Select Hw_Cal_Hi_P, and enter a value at or near full scale corresponding to
the percentage of full scale required for the high calibration point e.g. 90%. The
module will output its value corresponding to the percentage entered as the
Hw_Cal_Hi_P
(7) Read the value displayed by the DVM and record this value. As an example,
assume the meter reads 9.03 at the calibration point 90%. Convert this to the
percentage of full scale, in this case, 90.3%. Enter this as the value of the
Hw_Cal_V. The voltage read on the meter will now equal the requested value
e.g. 9.0V.
PC3000 - Installation Guide