Condec UPS3000, Installation, Operation & Maintenance Manual

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10 UPS3000/UPS3110/UPS3210 Operation & Maintenance Manual
2.4.3 Conversion Enable
As standard practice, the instruments are supplied with display indication in PSI (either Absolute, Gage or both)
and capable of being converted to a range of nine units via the front panel
CONV
push-button switch.
NOTE: When the PEAK HOLD or MAX/MIN option is supplied with a model having the ABS or GAGE mode, switch
selectable from front panel, the “ CONV ” button will be disabled and will not be present on the front panel. Therefore, the
required conversion must be set thru reconfiguration. See “Engineering Conversion with PEAK HOLD or MAX/MIN
Option” on page 12 for applicable method to change to required conversion
.
2.4.4 Digital Averaging
Digital Averaging is a technique whereby numerous update cycles are averaged together before the numerical
display data is changed. In essence, this feature acts as a variable rate electronic filter to provide a more stable
pressure indication reading.The “
AUTO”
mode of this filter allows the display to update rapidly (12/sec.) when
the input pressure is being quickly changed and yet provides extremely stable display operation (3/sec.) when the
desired pressure input value has been obtained.
2.4.5 AUTO-ZERO Maintenance (AZM) Enable
The Automatic Zero Maintenance (AZM) feature is used to “hold” the indicator reading to a “zero” value as long
as the actual pressure input is maintained at zero. If the input pressure changes by more than one half a least
significant display digit between two consecutive display update cycles, the “hold” feature is automatically
disabled and the exact magnitude of pressure being exerted will be displayed. In some applications, it may be
better to operate the instrument without the AZM circuit enabled. If so, pressing the
ZERO
push-button switch,
with zero pressure applied to the instrument, will guarantee that each new pressure cycle begins at zero.
2.4.6 Automatic Span Maintenance (ASM) Enable
The Automatic Span Maintenance (ASM) circuit operates in conjunction with the front panel
CAL
push-button to
provide a Self-Check feature that insures long-term accuracy by utilizing the computer to generate and control an
internal “shunt calibration mode” of operation wherein the indicator reading obtained is compared against, and if
necessary, corrected to the digitally-stored value for the same shunt calibration reading obtained at the time of
initial pressure calibration.
Switch Setting S1 Position 3 Front Panel Conv Key Mode
0 Disabled
1 Enabled
Table 2-3. Conversion Enable Switch Setting
Switch Setting S1 Average Select Approximate Update Rate
Position 4 Position 5
0 0 1 (Off) 12/sec.
1 0 2 6/sec.
0 1 4 3/sec.
1 1 Auto 3-12/sec.
Table 2-4. Digital Averaging Switch Setting
Switch Setting S1 Position 6 AZM Mode
0 Disabled AZM
1 Enabled AZM
Table 2-5. AZM Enable Switch Setting
Switch Setting S1 Position 7 ASM Mode
0 Disabled ASM
1 Enabled ASM
Table 2-6. ASM Enable Switch Setting