Precautions For Operating Conditions; Precautions For Installation Location; Precautions For Power-On; Returning Equipment - Oval ALTI mass CA00A Instructions Manual

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1.4 Precautions for Operating Conditions

In order to maintain the design metering accuracy and long service life, it is essential that the ratings,
such as the flowrate, pressure, and temperature be held within the specified limits. These operating
conditions are stated in Sections "3. SPECIFICATIONS and PERFORMANCE" and "14. PRODUCT
CODE EXPLANATION", "15. PRODUCT CODE EXPLANATION OF THE OLD PRODUCT CODE" of this
manual. Do not fail to make sure of them before placing the meter in service.
・ If the process fluid is corrosive, the meter materials must be considered for compatibility.
・ Cleanse the interior of flow tube thoroughly after use for measuring fluids that tend to deposit
solids. A flow tube with solid deposits adhering to it can affect the meter accuracy.
・ If you want a change in operating conditions, consult the factory.
・ Some gas-mixed flows that are not homogeneous are not measurable. Consult the factory for
technical assistance in such applications.

1.5 Precautions for Installation Location

CAUTION
・ If there is a risk of process pressure exceeding flowmeter's permissible pressure, a
pressure protection device must be installed on the process.
・ Do not touch the surface of flowmeter directly. Depending on process conditions, the
surface temperature of flowmeter may be high or low.
・ To ensure accurate and consistent measurement, the Coriolis flowmeter should be
installed in a location where pipeline oscillation will not exceed 0.3G.

1.6 Precautions for power-on

Be sure to close the display lid and the terminal lid of the transmitter before turning on the power. The
explosionproof enclosure must be ensured (with the requirements stated in section 10.5 satisfied) before
use.
To ensure the stable measuring condition, allow 20 minutes of warm-up period. "WARM UP 20" will be
displayed for 20 minutes after powering-on. The number indicates remaining warm-up period (min.).

1.7 Returning Equipment

If the meter must be returned to OVAL for any reason, follow these steps to ensure the most efficient
processing.
(1) Clean the unit and flush out the tubes without fail and pack the sensor unit carefully. Fully document
the fluid. Inadequate information will delay handling of the meter. (⇒ Fill in the forms prepared on
pages 160 and 161.)
(2) Enclose complete information about the material being returned including model and serial
number, the reason for return, return address, and full documentation of the type of fluid.
(3) Pack the equipment carefully, using the original packing if possible.
(4) Return the complete flowmeter, including the separately electronics unit with all of the circuit boards
and associated parts.
Remove the conduit connections and all other parts not originally shipped with the meter.
(example: wiring connections)
1. Be sure to remove the accumulation of foreign matter on the inner walls of the
sensor unit completely. Because the sensor unit cannot be disassembled, OVAL will
not be able to handle residue inside the tubes and service your meter.
2. Do not touch instrument or housing directly if the process temperature is high.
3. Never loosen process connector nuts while instrument is still on process line, and
never let explosive fluid burst into atmosphere.
4. Do not touch process fluid or inside of instrument when removing instrument from
hazardous process line.

WARNING