(4) When Area Compensation is in use, the gain of the
load signal actuating the Load Limits is divided by
the normalized mantissa (base number) of the area
value (see Area Compensation on page 5-38). Hence,
when Area Compensation is not equal to 1.000, the
Load Limits should be set based on the normalized
value of stress.
EXAMPLE:
Maximum stress limit = 100 psi
Area compensation (normalized) = 2.0
Set MAX LOAD LIMIT to 100
(Note: Actual load = 200 lb.)
Before setting stress limits, become familiar with the
limitations due to load cell capacity as described in Ap-
pendix A.
Operation
To set a limit and a crosshead action on the Limits Panel:
(a) Press the LOAD, EXTENSION or STRAIN limit
key (MIN or MAX) for the required limit. The re-
lated LED lights and the current limit value appears
on the Main Panel Display.
(b) Enter the value, and the sign if negative (refer to
Notes 1 and 2 below), of the limit on the keypad. The
displayed number flashes until it has been entered
into the system.
Notes
1. If the sign (+ or -) of the output signal of the
load cell (or strain transducer) in use is nega-
tive (-) with increasing load (or strain), then a
System
Operation
Electronic Limits
5-31
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