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Interface
Option BCD: Data Output
This option provides parallel BCD data on p rear-panel 50-pin connector. All outputs are
TTL comparable levels with a drive capability of 1 LS load. The Option BCD may be used to
drive the Valhalla Model 1248. (See Chapter 8)
Model 1248: Dual-Limit Comparator
The Valhalla Model 1248 may be used in conjunction with a 4100 Series Ohmmeter and Option
BCD above. The Model 1248 is a dual-limit BCD comparator that interprets the display
indications of the ohmmeter as either "HI", "LO" or "GO", based on a tolerance that is set by the
user. Relay contact closure is provided to trigger an alarm, counter, batch sorter or other device.
The 1248 also reduces operator workload by allowing him to make an instant determination of
the test results. The mating cable from the ohmmeter to the 1248 is 3' in length and designated
as "IDC-2".
Options IEEE, RS232, and PAR: Data Output
The Valhalla 4100 Series of ohmmeters is available with several of the industry's most popular
remote interfaces. These include a GPIB IEEE-488.2 compatible interface, a serial RS232C
interface, and a Centronics parallel printer interface for direct print-out capability. The
interfaces are for data acquisition only and do not provide range or function control of the
ohmmeter. The interfaces are available in any combination and may be used simultaneously.
Also refer to Chapter 8 and additional Addendums.
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