Condec UPS3210 - Manual (Page 7)

Introduction 3
With all its sophistication however, a great deal of effort has been expended to make the instruments simple to
operate and easy to calibrate.
Two micro-metering valves and vernier are provided to control the UPS3110 pressure source while the digital
display indicates precisely the magnitude of the applied test pressure. Also, a pair of simple push-button switches
provide both “zeroing” of the pressure display and the selection of either the “Gage” or “Absolute” calibration
mode. In like manner, the “Range” selection is accomplished via a clearly marked rotary switch. Over-pressure
protection is provided on lower pressure UPS3110 models via a fully adjustable pressure regulator which is
manually set for each new device being tested.
With respect to calibration, the instruments have been designed and programmed to be very user friendly in that
they provide the operator with various prompting symbols and legends during each phase of the calibration
sequence. Also, to prevent unauthorized tampering or calibrations, numerous features have been incorporated
which greatly minimize this potential danger. Also, the electronic circuitry has been designed without any
potentiometers or adjustments which eliminates the possibility of unwanted changes. Finally, the computer has
been programmed with a series of internal self-diagnostic routines which continually monitor and check every bit
of data stored and processed by this system, and immediately either notes or shuts down operation in the event of
an out-of-tolerance reading or outright failures.
The following schematic provides an overview of the UPS3110’s function.
Figure 1-1. UPS3110 Flow Diagram