Performance  Characteristics
Introduction
Electrical characteristics in Table 6-1  apply when the  2245A has  been cali
brated at an ambient temperature between +20°C and +30°C,  has warmed 
up at least 20 minutes,  and is operating in an ambient temperature between 
-10°C  and +55°C  (unless otherwise noted).
Items listed in the  “Performance Requirements”  column are verifiable quali
tative  or quantitative  limits that  define the  measurement capabilities  of the 
instrument.
Environmental Specifications of the 2245A are in Table 6-2,  and Mechanical 
Specifications  are  in  Table  6-3.
Recommended  Calibration  Schedule
To ensure accurate  measurements,  check the  performance  of this instru
ment  every  2000 hours of  operation  (once  each year  if used infrequently). 
When  components  are  replaced,  affected  circuits  may  have  to  be 
readjusted.
2245A  Operators
6-1