HP 3457A Service Manual page 43

3457A
Installation
TO MULTIMETER
HfL
CH
5
Figure 2-12. HP 44492A Simplified Schematic
2-36. HP 44492A Configuration. The HP 44492A Reed Relay Multiplexer Assembly can be configured for
ten 2-wire input measurements. It can be used to measure de voltage, ac voltage, ac + de voltage, resistance,
frequency and period. It cannot be used for 4-wire ohms or cur
nt measurements.
2-37, Figure 2-12 shows a simplified schematic of the HP 44492A Reed Relay Multiplexer Assembly.
2-38. Wiring Block Preparation
a. Remove the Strain Relief Plate from the bottom of the Strain Relief Housing (Figure 2-13, Step 1)
b. Remove the Wiring Block from the Strain Relief Housing (Figure 2-13, Step 2).
c. Strip 8 mm (5/16 in.) of insulation from one end of each wire to connected to the Wiring Block.
d, Loosen the appropriate retaining screw, insert the stripped end of the wire into the slot, and re-
tighten the retaining screw (Figure 2-14).
e. Repeat step "d" for each wire to be connected.
f. Connect the Wiring Block to the Strain Relief Housing.
h. Secure the Strain Relief Plate to the Strain Relief Housing. Tighten the screws until the plate is
snug against the wires. Do not over-tighten.
i. Press the Wiring Block Assembly onto the Plug-In Assembly connector and tighten the screws at
each end of the Strain Relief Housing.