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8.3 ANALOG OUTPUT
The analog output is intended to be used for connecting a recorder. The output is
isolated from the measurement circuits by means of optocouplers and a DC/DC
converter. The electronics needed for the output is placed on the same board as the
CL521-RS232C Option.
The output voltage Is 1 mV/t degree of the reading and 10 mV/1 ohm or 1 mV of the
reading.
When measuring the deviation from the preset value (DIFF function), the normal output
voltage is multiplied by 10. The output voltage is limited to the range -595 to +3500 mV.
8.3.1 Analog Output Specifications
Normal measurement;
Display reading
-255 to 2370°C
-418 to 3500°F
-10.0 to 110.0 mV
0 to 350.0 ohms
Output voltage
-255 to 2370 mV
-418 to 3500 mV
-100 to 1100 mV
0 to 3500 mV
Deviation measurement:
Display reading
-59.5 to 350.0°C
-59.5 to 350.0T
-5.95 to 35.00 mV
-5.95 to 35.00 ohms
Output voltage
-595 to 3500 mV
-595 to 3500 mV
-595 to 3500 mV
-595 to 3500 mV
SECTION 9 SERVICE AND CALIBRATION
CL521 does not need any regular service except for calibration checks. In case the unit
is not functioning properly, we suggest you contact OMEGA, since troubleshooting of
microprocessor-based circuits can be very difficult without a thorough knowledge of both
the hardware and software of the unit.
We suggest the calibration of the CL521 is checked approximately six months after
delivery. The proper calibration period after that is one year.
To check the calibration of the unit, the four screws at the bottom of the unit must be
removed. To remove the top cover, the rear of it must first be carefully lifted. When the
cover is removed, the calibration can be done easier by removing the screws at the front
and back of the terminal panel and lifting the panel aside.
Calibration is performed with the CL521 in battery operation (disconnected from the AC
Power Adaptor). Switch the unit on for about ten minutes before performing the
calibration procedure.
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