Section III Model 4342A
Figure 3-2
1
1. METER ZERO AD<J: This trimmer adjust- 6. OVER LIMIT SIC. OUTPUT Connector:
ment electrically zero-sets the meter Relay contact output for Go/No-Go
pointer so that it is exactly over the checks. Center and outer conductors
zero calibration mark when the instru- of this BNC connector are internally
ment is on. short-circuited when measured Q value
exceeds the limit value set by the Q
2. FUSE: Instrument power fuse is in- LIMIT control.
stalled in this fuse holder. Appro-
priate current rating for the fuse re- 7. Q .4NALOG OUTPUT Connector: 0 to 1v
quired is labeled on the rear panel. analog output proportional to meter
deflection. Output impedance is ap-
3. VOLTAGE SELECTOR: This slide switch proximately 1kR.
selects the appropriate ac operating
power voltage (115V or 230V +lO%).
Selection of the ac voltage must be 8. FREQUENCY MONITOR Connector: This BNC
made before the instrument is connect- connector provides a portion of inter-
ed to power line. nal oscillator output for monitoring
oscillator frequency with external e-
4. LINE Receptacle: Male ac power line quipment (such as a frequency counter).
receptacle with center ground pin for Output level is 17OmVrms min. and
powering the instrument from a 115V or output impedance is 50R.
23OV, 48 - 440Hz line. Before con-
necting power cord (furnished), VOLT- 9. Measurement Terminals: These six
AGE SELECTOR @ should be properly set. binding post terminals, including the
two shield terminals, provide the con-
5. OVER LIMIT DISPLAY TIME Switch: This nection capabilities for attaching the
slide switch sets "OVER LIMIT" annun- unknown sample as well as supplemental
ciation time for Go/No-Go checks to inductors, auxiliary capacitors, and
either 1 second (1 set) or to contin- other devices and accessories used in
ous (00). making measurements.
Figure 3-2. Rear Panel Controls and Connectors.
3-4 |
ACEC
HEWLETT-PACKARD
