13
.
Figure 5-4. Refrigerant Favorites Screen
Zero Pressure
The “Zero pressure” setting changes the pressure
reading from whatever the unit is reading to zero.
Selecting this setting for modification will open a
pop-up window with further instructions. Verify that
manifold pressures have been released before
performing this procedure.
Exiting the Set-Up Display
To exit the Set-up display, press the “Menu” key.
Settings Shortcut
While using any of the digital manifold or vacuum
gauge display screens, press the UP/LEFT key
to activate a pop-up screen where options can be
changed using the UP/LEFT and DOWN/RIGHT
keys. Press the MENU key to save the selections
and exit the pop-up screen.
Figure 5-5. Settings Shortcut Screen
Chapter 6
Maintenance
Introduction
Basic operator maintenance is covered in this
chapter. For more extensive maintenance and
for repair, contact Ritchie Customer Service. See
Chapter 1 for contact information.
General Maintenance
Since this instrument may be used in the pres-
ence of a wide range of chemical liquids and va-
pors, it is recommended that the case be cleaned
fairly often with a damp cloth and mild detergent
such as dish soap.
If the unit encounters enough exposure to liquid
chemicals that the chemical wicks between the in-
strument boot and the case, immediately remove
the boot and clean the case as described above.
The rubber boot may be immersed in soapy water
to clean it.
Although the display has a tough, hard-coated,
protective lens, clean the lens carefully, since
display clarity is a critical component of this instru-
ment:
Normally, the lens can be cleaned as one
would clean plastic eyeglass lenses: Use
a soft, 100% cotton or microfiber cloth and
water or eyeglass lens cleaning solution. Do
not use paper products.
If the lens is very dirty, generously soak a soft
cloth with warm, soapy (dish soap) water and
place the cloth for a couple of minutes over
the lens to loosen any stubborn dirt. Wipe off
excess water with a clean, less dampened,
100% cotton or microfiber cloth, and complete
the cleaning using the normal lens cleaning
method described above.
If a non-water-soluble substance adheres to
the lens, soak a small piece of soft cloth with
kerosene and place the cloth for a couple of
minutes over the substance to loosen it. Gen-
tly dab the loosened substance with clean,
less kerosene-dampened pieces of 100%
cotton cloth until the substance is lifted. Allow
to dry and then complete the cleaning using
the normal lens cleaning method described
above.
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