Section 3
3-16
Operation
Using the 610-03 Digital Pressure Meter
The 610-03 Digital Pressure Meter is a lightweight, portable pressure
gauge which can be used to measure differential pressure or vacuum from
a variety of sources, including the LI-610 Portable Dew Point Generator.
Follow these steps to measure over-pressure in the LI-610 condenser
block:
1)
Press the green button to turn the 610-03 ON. A low battery is
indicated by a "BAT" message in the lower left hand corner of the
display. Slight fluctuations may occur on the display if the two ports
on the top of the 610-03 are open.
2)
Select the range of the instrument by pressing either the "1" or "0.1"
buttons. Pressing the "1" button selects a range of 0-1000 mbars (1
mbar resolution), and the "0.1" button selects a range of 0 to 199.9
mbars (0.1 mbar resolution). To use the 610-03 with the LI-610, you
would ordinarily select the “0.l” button.
3)
Attach a male Luer lock (in the LI-610 spares kit) to the fill/drain
port on the LI-610 condenser housing. Connect a section of the 1/8"
ID tubing (included) between the Luer lock and the left-hand
pressure connection port on the top of the 610-03. The display will
show positive values if pressure is exerted on the left port, or if a
vacuum is applied to the right port. The display will show negative
values if a vacuum is applied to the left port, or pressure is exerted on
the right port.
4)
With the LI-610 turned OFF, zero the 610-03 by turning the knob on
the bottom of the pressure meter in either direction until the display
reads 000 (or 00.0).
5)
The millivolt output connector is located between the two pressure
ports on the top of the 610-03. The voltage output from the 610-03 is
linear, and corresponds to 1 millibar/1 millivolt. Connect the red
lead to the positive terminal of your measurement device, and the
black lead to the ground (or chassis ground, if available).
6)
Press the red button to turn the 610-03 off.
