Ashcroft Digital Test Gauge, Руководство по эксплуатации

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Zero Calibration:
Step 14:
Press the CONFIG key once and the word
CALIBRA appears. Press ENTER. (This
mode allows for 0 and full- scale adjust-
ment of span.) The gauge will now dis-
play 0.00. Ensure the gauge is not pres-
surized,
1 then press ENTER to zero the
gauge. Zero calibration is now complete.
Full Scale Calibration
Step 15:
The gauge will now display full-scale
range (e.g. 100.00 psi). Pressurize the
gauge to 100% of the range (which is
equal to the displayed value) utilizing a
pressure standard with accuracy four
times greater than the unit being calibrat-
ed.
2 Press ENTER. Full-scale calibration is
now complete.
Notes:
1.
If the digital gauge under test is not pressurized
while in span adjustment of full-scale range, an
ERROR message will be displayed when the
ENTER button is pressed. If this occurs, press
the ZERO CLEAR button on the keypad to return
to the previous screen.
2. ASME B40.7-1998, section 6.1.1.1 recommends
the working standard for the gauge being tested
is 4X better than the digital gauge under test.
This means the pressure standard measuring
the full-scale pressure being applied to the
gauge should have an accuracy four times
greater than the unit being spanned.
Zero SP (span):
This feature allows setting the % of span in which
the zero button will operate. Span is limited to pre-
vent accidental tare of process pressures.
Options
are 5%, 10% or DISAB (5% is the factory default
and means the unit can be rezeroed between ±5%
of span). If DISAB is selected, the zero button is
deactivated and no display change will occur when
the zero button is pushed.
KEYPAD FUNCTIONS
I&M008 10080 Rev. E_layout 10/14/13 9:35 AM Page 13