Product specifications

Smart LT Manual Dynatronix, Inc.
198-0853-02 Rev F Page 67 of 126
10.2.3.2. Analog Calibration Procedure
This sequence sets the calibration values for the optional analog interface.
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1. From the “Calibrate Configuration Menu” rotate the current encoder until the display
shows “CAL” “OPt”. Press the voltage encoder switch to enter the “Option Card
Calibration Menu” (see A.6.5.Calibrate Configuration Menu and A.6.5.2.Option Card
Calibration Menu for more information regarding menu navigation). The calibration
menu contains a “dFLt” sub menu to load default calibration values (see
10.1.3.Restoring the default calibration values) and it contains sub menu selections for
each calibration point (CL09 to CL16). Each calibration point should be calibrated in
numerical order (first calibrate CL09, then CL10, and so on until CL16 is calibrated).
The calibration points can be viewed in any order at any time (remain in local control
mode to view calibration points, calibration points are not changed while the unit is in
local control mode (RMT lamp is off)). The chart in section 10.1.2 describes each
calibration point and the text displayed for each point.
2. Connect the calibrator (Ronan model x86 or equiv.) to the Analog Control connector of
the power supply as shown above for the current calibration connections (connect the
calibrator output to the analog current control input on the LT, connect the calibrator
input to the LT analog current read back output). The calibrator should be set to a range
that will maximize resolution for a 20mA signal for a 4-20mA interface (5v for 0-5v
interface or 10v for 0-10v interface).
3. From the “Option Card Calibration Menu” rotate the current encoder until the display
shows “CAL” “CL09”. Press the voltage encoder switch to view and change the upper
current control analog input calibration point. The top display will show “I.Hi CtL CL09”,
the bottom display shows the calibration point value.
4. Set the calibrator output to 20mA (5V for 0-5V or 10V for 0-10V).
5. Put the supply in REMOTE mode (press the RMT/LCL switch so that the RMT/LCL
lamp is on) to begin calibrating the upper current control analog input calibration point.
6. The upper current control analog input calibration value (CL09) is automatically updated
to reflect the connected calibrator output. Wait a few seconds for the calibration value
to stabilize and then press the voltage encoder switch to accept the new value and
return to the “Option Card Calibration Menu”.
7. From the “Option Card Calibration Menu” rotate the current encoder until the display
shows “CAL” “CL10”. Press the voltage encoder switch to view and change the upper
current read back analog output calibration point. The top display will show “I.Hi rEAd
CL10”, the bottom display shows the calibration point value.
8. Put the supply in REMOTE mode (press the RMT/LCL switch so that the RMT/LCL
lamp is on) to begin calibrating the upper current read back analog output calibration
point.
9. Adjust the current encoder until the calibrator input reads the proper value for 100% of
the analog output control signal (20mA for 4-20mA or 5V for 0-5V or 10V for 0-10V).
10. Press the voltage encoder switch to accept the new calibration value and return to the
“Option Card Calibration Menu”.