720A Operation and Maintenance Manual – Rev S – January 25, 2019
Page 14
13231 Rooster Springs Rd.,
Austin, TX 78737
T:
(512) 858-4045
E:
amptec.com
new fuse, first ensure that the polarity of the fuse is correct, and then gently push it into
the receiver on the inside of the cap.
D-3.2 AC Inlet
This AC inlet (refer to item 2 within
Figure 4
on page 13) acts as a receiver for the AC
power cord (P/N 720-AC) that comes with the unit. Once an AC power cord has been
plugged into this AC inlet, you may connect its other end to an outlet. This AC inlet is an
IEC 60320 C-14 connector. Its current rating is 15A and its voltage rating is 250V. If
operating this unit from outside of the U.S., you may use any AC power cord that has a
60320 C-13 connector (this ensures that is compatible with the unit’s inlet) and a max
voltage rating of 250V or less.
D-3.3 RS-232C Terminal Block
This terminal block (refer to
Figure 6
above) allows resistances readings to be taken
from the rear of the meter. Each gold terminal is electrically connected to the front panel
post of the same label.
To take a reading from the rear panel, connect the measurement leads to each pin of
the rear terminal block using the rear terminal screws shown in
Figure 6
. Clip or ring
tongue termination ends fasten securely to the screws. Connect the opposite ends of
the measurement leads to the unit under test (UUT) in the same configuration as a front
panel reading. Note that the AMPTEC leads/probes supplied with your unit are not
compatible with the rear panel terminal.
Lastly, please note that readings taken from the front panel and the rear panel may
differ from each other slightly slightly (within 5 counts).
D-3.4 RS-232C Connector
This connector (refer to item 4 within
Figure 4
on page 13) is a DE-9 female IDC
connector that supports RS-232C connections. You may use any cable that has at least
one DE-9 male end to connect this port to your computer. As it is rare for modern
computers to come standard with an RS-232C port, you may use an RS-232C to USB
Figure 6
Rear Terminal Block
