10A45.4 SETUP AND/OR OPERATING CONSIDERATIONS
3 SETUP AND/OR OPERATING CONSIDERATIONS
3.a CONFIGURATION AND CALIBRATION
For initial configuration of ANALOG INPUT CHANNELS dedicated to a specific Model
10A45 card, see the general remarks on System 10 “real-channel” configuration in
Manual Section 1.G.1 and elsewhere in the
System 10 Guidebook. All analog input
channels derived from a Model 10A45 must be given a channel “type” code of
55
(“raw” millivolt signal).
The 10A45's SHAFT TORQUE SUBCHANNEL (No. 1) and SHAFT SPEED SUBCHAN-
NEL (No. 2) both employ TWO-POINT (DEADWEIGHT) calibration, using the standard
ZERO (ZRO) and FORCE (FRC) commands. The mainframe’s EEPROM Write Pro-
tect Switch
must be ON for these commands to be effective. See Manual Section
1.G.5 for general instructions on this conventional “zero and span” technique.
The 10A45's SHAFT TEMPERATURE SUBCHANNEL (No. 3) employs CPU-BASED
ABSOLUTE
calibration (described in Manual Section 1.G.3.a), which means that nor-
mally NO calibration need be performed by the user, once the channel has been prop-
erly configured.
3.b HORSEPOWER CALCULATION
If system Channel No. “y” has been “located” to the 10A45's SHAFT TORQUE SUB-
CHANNEL (No. 1), and Channel No. “z” to the SHAFT SPEED SUBCHANNEL (No. 2),
then a system “CALCULATE PSEUDOCHANNEL No. x” can be easily set up to monitor
and/or display the resultant horsepower. Assuming that Channel No. y is currently
reading
footpounds, you need only turn ON the system EEPROM SWITCH and com-
mand
CLC x = (CHN y)(CHN z)/5252 [CR]
If torque is being measured in newton-meters, the divisor would be “7121.”
10A45 SHAFT TORQUE SENSOR CARD
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