11
Installing batteries
First remove the battery compartment cover. To do this, hold the unit upside down in
your weaker hand. Place the heel of your stronger hand on the back of the unit. The
fingers of your stronger hand should now be able to touch the ridges in the battery
compartment cover. Squeeze the battery compartment cover between your fingertips and
the heel of your strong hand. As you do this, the cover will lift away from the unit. Check
Figure 4 to be sure of the placement of the heel and fingers of your strong hand. Practice
this several times the first time you have to remove the cover.
Inside the cover there may be a black and white or black, darkgrey, lightgrey, white
target. This is a calibration check target. Do not damage this target, get it dirty, or leave it
in direct sunlight.
To remove old batteries, pry with a pencil, insulated screwdriver or other thin strong
insulating tool between the case and the battery just above the terminals. The battery will
release from the terminals with a clear snap. Then slide the battery away from the
terminals and pry it up out of the clips. Note: We do not recommend the use of
rechargeable batteries. Depending on the type, rechargeable batteries may not produce
enough voltage to perform even one measurement.
Figure 4 Removing battery cover
