UVP Crosslinkers - Manual (Page 9)

UV CROSSLINKERS UVP
9
CROSSLINKER CALIBRATION PROCEDURE
Equipment necessary:
• Chart recorder
• Two probes with banana plug adapters
• One radiometer with UVX-25 calibrated sensor
• Cable with banana plug and jack adaptor to connect radiometer to chart-recorder
• Power source (100V, 115V or 230V)
Procedure:
1.
Connect the Crosslinker to the power source. Do not turn on the unit at this time.
2.
Connect the testing probes to the chart recorder and to the Crosslinkers PCB as follows:
PEN 1 (red) to the right side of R7
PEN 2 (blue) to the right side of R6
Ground both pens at the lower part of R2
Note: While connecting these probes, the switches for both pens on the chart recorder should be
on ZERO position to avoid possible damage to the recorder.
3.
Place the UVX-25 sensor inside the Crosslinker at the center and slide the sensor cable through
the upper hole of the inner chassis. Plug the sensor cable into the PCB's jack.
4.
Select 5V scale for both pens. Turn the chart recorder on.
5.
Select a speed of 15mm/min.
6.
Switch both pens to MEASURE and DOWN positions so they can touch the chart paper.
7. Adjust the ZERO position for both pens.
8.
Press the CHART DRIVE switch.
9. Run the Crosslinker in calibration mode by depressing the STOP/RESET button and turning the
power switch on at the same time. At this point, both pens should start recording information on
paper. Sometimes either pen will record zero information regardless of the lights in the
Crosslinker being on, if this is the case, check for bad connections.
10. During calibration, check the voltage levels on both pens. By adjusting the potentiometers R21
and R29 on the PCB, adjust the values of R6 and R7. Depending on the voltage used, from past
units it has been found that the optimum values for these levels are:
VOLTAGE RANGE FOR R6 RANGE FOR R7
115V 3.3-3.5V 2.1-2.3V
220V 3.5-3.7V 1.7-2.0V
100V 2.5-2.7V 2.6-2.9V
11. When the calibration cycle is finished, move both pens to UP and ZERO positions.
12. Unplug the UVX-25 sensor and disconnect the probe for PEN 2.
13. At this point, it is necessary to check the energy levels of the Crosslinker to see if the unit was
calibrated properly. Slide the UVX-25's cable through the lower hole of the inner chassis and plug
it into the radiometer.