20 21
• Remove the battery pack from the instrument as
described in Section 8.2.
• Remove the two screws which hold the battery module
in place as shown in Figure 4.
• Lift the Nicad battery module from the battery pack.
• Place the new Nicad module in the battery pack.
• Replace the two screws which hold the Nicad module
in place.
8.2.2 REPLACING ALKALINE BATTERY CELLS
The alkaline battery pack holds 6 C-cell batteries. To
replace the alkaline battery cells:
• Remove the battery pack from the instrument as
described in Section 8.2.
• Remove the alkaline cells from the battery pack.
• Insert the new cells making sure to observe proper
polarity.
NOTE: Proper polarity of the alkaline battery cells is
identified by the molded “+” and “-” symbols in
the bottom of the battery pack. In addition the
positive (+) battery contact is identified by the red
polarizing tab.
8.3 OPENING THE INSTRUMENT FOR SERVICE
To open the instrument for service:
• Remove the battery pack as described in Section 8.2.
• Remove the four screws from the bottom of the
instrument chassis.
• Gently lift the case top from the chassis.
8.4 INSTALLING OR CHANGING SENSORS
To change sensors in the ATX612:
• Open the instrument as described in Section 8.3.
• Remove the three screws which hold the sensor manifold
in place.
• Gently lift the sensor manifold away from the chassis as
shown in Figure 5.
NOTE: It is not necessary to disconnect the sample tubing
from the manifold to replace the sensors.
8.1 CLEANING
Wipe the outside of the instrument with a soft, clean cloth.
Never use solvents or cleaning solutions of any type.
8.2 CHANGING THE BATTERY PACK
To change the ATX612 battery pack:
• Hold the instrument with battery pack facing up.
• Using the maintenance tool provided with the
instrument, turn counter-clockwise and loosen the two
hex screws in the battery pack.
• Remove the battery pack. (See Section 8.2.1 for
instructions of replacing the Nicad battery module)
• Place the battery pack on the instrument.
• Turn the hex screws clockwise until the screws are tight
and reach the stops. DO NOT OVER TIGHTEN.
8.2.1 REPLACING THE NICAD BATTERYMODULE
The Nicad cells within the battery pack may be replaced
when necessary by installing a new Nicad battery module.
To replace the Nicad battery module:
Figure 5
Figure 4
Battery Pack
Hex Screws
Nicad Battery
Module
Battery Pack
8.
M
AINTENANCE
