Model 520 HT UCA
D01157216
Revision A, October 2015
11
be dry and relatively free from dirt and oil. The air should be supplied at a pressure
of 20-100 psig (1.4-6.8 bar). Compressed nitrogen may also be used in place of the
compressed air if necessary.
Drive air should be filtered between 5μ and 40μ and
have a maximum dewpoint of 50°F. Very wet air will wash out lubricant and cause
exhaust icing. Very dry air (dew point below 0°F) will dry out lubricant and cause
premature failure of spool o-rings.
If high pressure bottles of nitrogen or air are used to operate the
instrument, make certain that the pressure supplied to the
instrument does not exceed 100 psig (6.8 bar). Applying high
pressure gas to the instrument can cause tube rupture and
possible injury.
Electrical connections are made using the receptacle on the rear of the instrument.
A power cord is supplied with the instrument. Please observe the following
precautions when making the wiring connections.
Wiring should be completed by a qualified installer in accordance
with local electrical codes.
The instrument should be securely connected to a separate earth
ground. The ground wire must be larger in diameter than the
supply conductors
An 8BC or larger fire extinguisher to fight electrical and oil fires
should be placed within 50 feet of the consistometer.
Some components such as the touch screen LCD monitor may be removed from the
instrument prior to shipment and shipped in a separate container to prevent damage.
This device must be reinstalled before operating the instrument. The monitor
cables include one USB and one VGA cable which must be connected to the
control box and one AC power cable which must be connected to the 230 VAC
input on the monitor.
