No.Q-0600-0057-05
8. Maintenance, Inspection, and Adjustment
It is recommended to perform periodical inspection at least once a
year although the appropriate inspection interval depends on the
operating environment.
In addition, check the zero point every 3 months, and perform zero
adjustment when necessary before use.
Normally, this unit requires only zero adjustment for maintaining
high accuracy. When this unit needs recalibration, send it to
VALCOM or perform calibration by following the procedure below.
1) Prepare a calibrator with guaranteed accuracy.
2) If the input must correspond to the "0" indication, make sure that
the indicated value is "0".
3) Make sure that the reading falls within the limits when the rated
pressure is applied and when 1/2 of the rated pressure is
applied.
4) If the reading is out of the limits, perform calibration by following
the procedure below.
1. Remove the outer frame of the front panel, and then take the
front panel out by hooking the notch with a screwdriver, etc.
(When the front panel is secured with the panel mounting
bracket, loosen it first.)
2. If the input must correspond to the "0" indication, turn the
indication zero adjustment trimmer to set the indicated value to
"0".
(For absolute pressure, zero the reading when 20Pa
･
abs or
lower is applied.)
3. While applying the rated pressure, adjust the reading by
turning the reading span-adjusting control.
4. Perform the above-mentioned calibration again for
confirmation, and then check the non-linearity, etc. under 1/2
of the rated pressure.
5. In addition, adjust the analog output by following the
above-mentioned procedure.
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