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10AHM

$1,275
 

Model 10AHM Health Monitor Card

Installed in any unoccupied System 10 "A Slot," this card lets the system read and display all pertinent power and reference voltages.  It has its own independent temperature-stabilized reference source to verify the accuracy of all measurements.

The 10AHM's eight diagnostic "subchannels" are listed in the table below.  Each subchannel can be dedicated to an otherwise unused system data channel.  It can than be scaled and filtered like any analog data channel, and can be continuously and automatically monitored for conformance to specific limit values.

The companion Model 10BDHM is a "B-sized" card which, when connected to the 10AHM via a special cable, can be used to monitor B-Deck voltage supplies, plus critical software handshake lines and other dynamic signals.  If the 10BDHM is used along with the 10AHM, there will be 21 subchannels in all. 

Model 10AHM Subchannels

No. 1

Measures various voltages referenced to Signal Common with a clip lead.  May be used to troubleshoot cards in conjunction with the Model 10AST Analog Slot Test Card

No. 2

An on-board +2.5000-V reference, temperature-stabilized in its own oven.  Used to track the gain drift, if any, of the A/D and its amplifier. 

No. 3

Measures the amplitude of the system AC Reference, which controls the excitation levels for LVDT and AC strain gage cards.  Its frequency (3276.9 Hz) also provides sync for a variety of cards. 

No. 4

Measures the system DC Reference.  Since System 10 is ratiometric, this should always read 5.000 ± 0.001 V.  Deviations indicate trouble with the mainframe's Model 10BIP232 RS232 Interface Card.

Nos.
5 and 6

Measure the ±9-volt supplies, which are factory-set to ±8.90 V.  Normal loading effects should not result in more than 0.3-V drop. 

No. 7

Measures the local (A-Deck) SIGNAL COMMON.  Large deviations from 0 indicate excessive current, and thus possible faulty modules on the A Deck.  Faulty input wiring can occasionally cause this also. 

No. 8

Measures the local (A-Deck) POWER COMMON.  As with Signal Common, large deviations from 9 indicate excessive current, and thus possible faulty modules on the A Deck.  Faulty input wiring can occasionally cause this also.

 
 
 
 

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