Honeywell Mini-AT, User Manual, Page: 28 / 156

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Mini-AT User Guide
Installing or Changing Battery Packs
The standard power supply for the Mini-AT is an alkaline receptacle pack (40-1865) for six replaceable D-cell
batteries (batteries not included). The battery pack is mounted inside of the instrument’s case door (see figure
6). The expected service life of the battery pack is greater than three (3) years under normal use, with
considerable reserve to allow for battery replacement after the low battery alarm occurs. If the battery voltage
drops below a preset value, a BATTERY LOW alarm occurs. When this alarm occurs, the batteries (or battery
pack) should be replaced.
Several optional power supplies are available for the Mini-AT, including: lithium power pack (40-
1447), disposable alkaline battery pack (40-1595), a line operated, 120vAC to 9vDC power supply
(40-1775) or Solar Power.
Two main board, battery connections (J7 & J8) allow for changing the battery packs without removing
electrical power from the unit. As with any computer, IT IS IMPORTANT
NOT TO DISCONNECT
POWER WHILE THE UNIT IS OPERATING, perform a SHUTDOWN first.
To install batteries in Alkaline Receptacle Pack
• After placing the instrument in Shutdown (or plugging a second battery pack into J7 or J8), loosen the
three screws that secure the Alkaline Receptacle pack to the inside of instrument’s door, item A in figure
7 on page 27.
• Unplug the battery cable from the main board (see figure 8 on page 27 & 1 on page 8). Remove the
battery pack assembly from the instrument by sliding the pack up and off the door.
• Loosen the two slotted screws at both ends of the battery pack.
• After disengaging both clips, remove the aluminum cover from the battery assembly.
• Replace or install 6, D-cell alkaline batteries, making sure to orient each cell for proper polarity.
• Reinstall the aluminum cover and tighten the two slotted screws. Hang the battery assembly and tighten
the three screws.
Warning: To reduce the risk of ignition of a flammable atmosphere, batteries must only be changed in an area
known to be nonflammable. Cover must be secured before installing in instruments.
Install or replace disposable battery pack
Refer to figures 7 and 8 while following the procedure below:
• Loosen the three (3) slotted screws (item A) and remove the aluminum battery
cover (item B), see figure 6.
• Plug in the new battery cable at the main board connector J7 or J8 (see figure 1).
• If present, unplug and remove the old battery pack (item C).
• Install the new battery pack by hanging the plate on the top two (2) hanger screws (item
A). Replace the aluminum cover and tighten all three (3) slotted screws (item A).
• Position the battery cable in the white plastic spring clip (item D).