Condec 3030 - Manual (Page 15)

display will indicate "OL" when an inappropriate pressure is applied.
If "OL" is observed on any pressure display, the pressure should be
reduced or vented immediately to prevent damage or possible
personnel injury. "OL" is displayed when the pressure exceeds 120%
of the nominal range of the sensor or when a vacuum in excess of 2
PSI is applied on gauge range sensors.
Figure 5
Use the (ZERO) key to zero the pressure sensor when vented to
atmospheric pressure.
Important NOTE: To protect sensor integrity and prevent damage
to the sensor, the calibrator will display OL [overload] when the
applied pressure exceeds 120% of the full scale calibrated range of
the sensor.
Important NOTE: To ensure accuracy of the calibrator it is critical
to zero the calibrator before a device is calibrated.
3.1 Media Compatibility
The calibrator utilizes a media isolated sensor to prevent sensor
contamination. Whenever possible clean, dry Nitrogen is the media
of choice. If that is not always possible, make sure that the media is
compatible with Nickel Plated Brass and 316 Stainless Steel.
3.2 Measuring Pressure with External Modules
The calibrator provides a digital interface to External Pressure
Modules. These modules are available in various ranges and types
including gauge, vacuum, differential and absolute. The modules
work seamlessly with the calibrator. Simply plug them into the
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