Fluke 721Ex User Manual page 11

•
The battery door must be closed and
locked before you operate the Product.
•
Do not improperly apply pressure. Vacuum
should not be applied to any gauge
pressure sensor. The Product display
shows "OL" when an inappropriate
pressure is applied. If "OL" is shown on
any pressure display, the pressure should
be reduced or vented immediately to
prevent Product damage or possible
personnel injury. "OL" is shown when the
pressure exceeds 110 % of the nominal
range of the sensor or when a vacuum in
excess of 2 PSI is applied on gauge range
sensors.
•
Push the ZERO button to zero the pressure
sensor when vented to atmospheric
pressure.
•
Check entity parameters before making
any connections to this Product.
•
Remove the batteries if the Product is not
used for an extended period of time, or if
stored in temperatures that exceed the
battery manufacturer's specifications. If
the batteries are not removed, battery
leakage can damage the Product.
•
Replace the batteries when the low battery
indicator shows to prevent incorrect
measurements.
•
Be sure that the battery polarity is correct
to prevent battery leakage.
•
Repair the Product before use if the battery
leaks.
•
Use only specified replacement parts.
Pressure Calibrator
Safety Information
3