Instruction manual

120-00004 REV A 10/6/2011 4000 DIGITAL MANUAL PAGE 15
General Maintenance
4.0 Battery Life
Because of current requirements of the circuitry, “C” Size Alkaline
battery life is approximately 4 weeks, whether the unit is operating
or not. Note: Batteries vary in capacity by manufacturer and
may provide more battery life. Analyzer malfunction, as a
result of low battery, will be evident as either inability to zero the
monitor or clipping of the display at a fixed reading below full
scale.
Nickel-cadmium battery life is indeterminate. It is somewhat
dependent upon how well the charge level is maintained.
4.1 Battery Charging and Replacement
All models of the 4000 Series analyzers use two “C” size alkaline
batteries. These are located on the hinged door, right side (fig. 4
pg. 7). Polarity is marked on the door over the battery holder.
If alkaline batteries are replaced before the Battery Test “B”
indicates a low battery condition, a few minutes warm
up/stabilization is needed before using the analyzer. If alkaline
batteries are low or dead, the analyzer should be allowed to sit for
12 to 24 hours after battery replacement. The FUNCTION switch
should be set to OFF during this time. This is to allow the sensor
time to stabilize again.
The rechargeable batteries are ½ “C” size NiCd and are rated at
0.80 ampere hours. They are mounted on the hinged door, left
side (fig. 4 pg. 7). Polarity is marked on the door, over the battery
holder. All models use four ½ cell “C” size NiCd batteries.
Condition is shown in the BATTERY TEST “A”, FUNCTION switch
position. The NiCd battery voltage changes quite rapidly as it
approaches the recharge point, which makes accurate display