Maintenance
55
HIT-4U
HP-327
8. MAINTENANCE
Batteries require periodic replacement, and battery life depends on
whether battery power is the primary or secondary power source.
All configuration settings are stored in nonvolatile memory; therefore,
configuration settings will not be lost in the event of battery failure.
Lithium Battery Replacement
WARNING: To prevent ignition of hazardous atmospheres, do
not remove the cover unless the area is void of combustible gas
and vapors. Replace the batteries only with battery pack part
number 100-2732 for Ex d certified systems.
WARNING: The lithium battery that powers the HIT-4U is a
sealed unit; however, should Lithium batteries develop a leak,
toxic fumes could escape upon opening the enclosure. Ensure that
the instrument is in a well-ventilated area before opening the
enclosure to avoid breathing fumes trapped inside the enclosure.
Exercise caution in handling and disposing of spent or damaged
batteries.
Important: Before replacing the lithium battery press the
►
key
to save the Total and Grand Total to nonvolatile memory. Once
the battery is replaced and power is restored to the unit, the last
saved Total will be displayed
The lithium battery is secured inside the enclosure by a Velcro strap and
connected to a connector (J3) near the top of the circuit assembly.
To replace a lithium battery in the HIT-4, perform the following steps:
Ex Enclosure:
1. Loosen the cover set screw and unscrew the cover of the enclosure
counter-clockwise until it separates from the main body of the
enclosure.
2. Using a small standard blade screwdriver, remove the two #4-40
screws located to the right and left side of the LCD display.
Flow-Tech, Inc. | In MD 410-666-3200 - In VA 804-752-3450 | www.flowtechonline.com
