Honeywell Mini-AT, User Manual, Page: 19 / 156

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Page 19
Mini-AT User Guide
Receiving the Mini-AT
When the instrument is delivered, be sure that all parts are received in good condition. Check the packing
list to make certain the shipment is complete. Report any shortage or shipping damages to your Mercury
Representative. Immediately file any damage claims with the carrier who delivered the shipment.
Function Check
Open the case door and check for any loose parts and verify that all connectors are properly seated. The
main battery pack is packaged separately and must be installed on the inside of the case door. Mount
the main battery pack and plug in the battery cable connector at either J7 or J8. The memory back-up
battery should already be mounted near the center right-side of the main board (see figure 9 on page 28). Plug
in the memory battery cable connector at J26. At this time, the Mini-AT should be displaying digits on the LCD
(probably all zeros) and the unit is ready for functional checks.
Note: All of the function checks assumes that the instrument is configured with default parameters. The
default configuration has assigned a commonly-used Meter Reader List, Pressure, Temperature and
Volume Units, Alarm Limits, etc. If the Meter Reader List or instrument configuration is something
other than the default, most checks can still be performed, but the results may vary slightly.
Pressure Function Check - Gauge Pressure Transducer
Use a mag wand to scroll through the Meter Reader List and stop at the live pressure display. With no
pressure connected, the LCD will display a value very close to zero, typically within plus or minus 0.2%
of full scale. To check the pressure measuring system, apply some amount of pressure (but less than the
full range of the transducer) and observe as the LCD value increases. There is a 10 minute time-out before
the instrument automatically reverts back to the Corrector Mode. Use the mag wand and scroll through
the remaining items until the instrument returns to the Corrector Mode.
Pressure Function Check - Absolute Pressure Transducer
Use a mag wand to scroll through the Meter Reader List and stop at the live pressure display. With no
pressure connected, the LCD will display a value very close to the local atmospheric pressure - typically
within plus or minus 0.2% of full scale. To check the pressure measuring system, apply some amount
of pressure (but less than the full range of the transducer) and observe as the LCD value increases. There
is a 10 minute time-out before the instrument automatically reverts back to the Corrector Mode. Use the
mag wand and scroll through the remaining items until the instrument returns to the Corrector Mode.
Temperature Function
Use a mag wand to scroll through the Meter Reader List and stop at the live temperature display. The
LCD will display a value very close to ambient temperature - typically within plus or minus 0.5 degrees
F. To check the temperature measuring system, grab the temperature probe near its tip and observe as
the LCD value increase. There is a 10 minute time-out before the instrument automatically reverts back
to the Corrector Mode. Use the mag wand and scroll through the remaining items until the instrument
returns to the Corrector Mode.