Condec UPC5110 - Manual (Page 11)

8 UPC5100/UPC5110 Operation & Maintenance Manual
7. With the vacuum pump still running, close the VENT valve (8) and check for system leaks. If there are
none, continue to step 7.1
7.1 To apply pressure, close the VENT valve (8) (approximately two turns to its stop) and open the
COARSE ADJUSTMENT valve (2) (approximately 1/2 turn counter-clockwise until the numerical
display begins to move). In general, the pressure may be changed rapidly until reaching
approximately 90% of its desired final value.
7.2 Use either the COARSE ADJUSTMENT (2) or VENT valve (8) to obtain a specific pressure
reading. Both provide precise control. As the pressure approaches the desired value, the valve
being used for control should be rotated slowly clockwise to its closed position.
7.3 To obtain exact pressure readings, slowly rotate the VERNIER control (13) knob in the direction
required (clockwise to increase pressure) as indicated by the electronic numerical display.
2.6 Battery Operation
When supplied with the battery, the UPC5100/UPC5110 has an internal, rechargeable 12 volt, lead acid battery
which provides a minimum of six hours of completely portable usage before having to be recharged.
An ON/OFF/BATTERY TEST switch (18) (Figure 2-3 on page 7) is provided to conserve energy when the
instrument is not in use, and to provide the operator with information as to the status of the battery voltage during
use.
The UPC5100/UPC5110 can be operated and recharged by connecting to a standard AC outlet via the line cord
(supplied). The battery re-charge cycle time is approximately 16 to 20 hours with the
ON/OFF switch in the OFF
position. The charging circuit is designed to be left on indefinitely without adversely affecting battery life.
When selected, the momentary action BATTERY TEST switch (18) is used to read the actual battery voltage. The
battery voltage reading typically is between 11.5 and 13.0 volts. When the battery voltage reads 11.5 volts, there
are approximately one to two hours of useful operation left and a low battery indicator is illuminated. For LED
display units, a LED in the left center of the display turns on. For LCD display units, five LED segments in the
left of the display window illuminate in a “U” shape. The instrument ceases to function when the battery voltage
is 11.0 volts or less.
NOTE: The battery test should only be performed with the UPC5100/UPC5110 operating at zero PSIG (VENT valve open)
and at the conclusion of the test, the unit’s ZERO button will have to be pushed again to re-zero the instrument.