Table of Contents
Advertisement
4.5
2251A Input Amplifier Setup Procedure
4.5.1
Introduction
4.5.1.1
This section provides the setup procedures that are to be carried out after repair of the
2251A or the failure of a routine specification check.
4.5.1.2
All setup procedures are to be carried out with the counters covers removed, at an
ambient temperature of 23 C ± 2 C. The counter must be allowed to warm up for a
minimum of 1 hour before commencing any setup procedure. The procedures given here
commence with the counter in the Home state.
4.5.1.3
It is recommended that the counter is read repeatedly and the current measurement
result displayed by the controller used while adjusting the counters input amplifiers
to obtain a stable count.
4.5.2
Input A Amplifier Setup Procedure
4.5.2.1
Set R12 fully counterclockwise and R10 to its midposition. R10 and R12 are located
on the counter PCB as shown in Figure 4-15.
Figure 4-15, Location of R10, R11, R12 and R15
4.5.2.2
Select Frequency A as the measurement function, set Input A input impedance to 50
ohms and set the counter resolution to three digits. (Command Code FA ALI SRS3
BI)
4-18
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
0
0
Advertisement
Table of Contents
