Ronan X55-600 Series - Manual (Page 6)

5.0 CALIBRATION
Should calibration be required, use the fol-
lowing procedure. NOTE: if one of the front
panel switches is changed to a new position,
the calibration procedure will need to be per-
formed. A clockwise rotation of the ZERO or
SPAN control will result in an increase in the
pressure output.
1. Connect the recommended air
supply to the air inlet fitting and a
pressure gauge to the air outlet.
2. Connect an mA calibration signal
to the electrical input terminals.
Set the mA input to the 0% value
(4 mA for 4-20 mA input range).
3. Observe the output pressure. If
necessary adjust the top accessible
ZERO control for the correct
pressure output.
4. Set the mA input signal to the full
scale value. (20.00 mA for a
4-20 mA input).
5. Observe the output pressure. If
necessary, adjust the top accessible
SPAN control for the correct
pressure output.
6. Repeat steps 2 through 5.
NOTE: When switching to or from
REV or SPLIT, the zero adjustment
may need to be turned several
rotations before the affect is seen
in the output pressure.
6.0 TROUBLESHOOTING
6.1 Pneumatic
1. Ensure that the supply pressure is
between 20 and 120 psig and at
least 5 psig over the maximum
output pressure.
2. Ensure that there are no air leaks at
all fittings.
3. Check the zero and span per
Section 5 (Calibration).
4. Check to see if the input filter is
obstructed (seated in the air input
fitting). Replacements are available
from Ronan.
5. It is extremely important that the
X55-600 air supply is clean (oil and
dirt free) and dry (moisture free). It is
highly recommended that Ronan’s
X55-77-4, or a similar quality
filter/preregulator be installed with
every I to P. Unit malfunctions due to
dirt or moisture damage are not cov-
ered under warranty.
6. The piezo-ceramic beam is a very
delicate device designed for
extremely small movements in pro-
portion to the signal supplied.
Attempting to deflect the beam man-
ually will result in a damaged or bro-
ken beam, which is not covered
under warranty.
6.2 Electrical
1. Check the position of the function
switches to ensure that they are in
the correct position. Most application
call for the INPUT, RANGE, and
REV/DIR switches to be in their 4-
20 FULL and DIR positions respec-
tively.
2. Check that the mA input leads are
connected in the proper polarity.
3. The voltage across the mA input ter-
minals with a mA signal applied
should be approximately 5.5 Vdc.
4