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Operation
2.9.3 Setting
%
The low and high limits (from entered nominal) are set using individual thumb-wheel
switches. The limits must be entered in % only using three digits each. A limit can be
entered to 1/10% i.e. an entry of 105 would be 10.5%. Note that the decimal point is
shown on the panel below each thumb-wheel switch.
Set the % deviation from nominal by pressing the push-button above or below the
digit to be changed. For example: A limit of 10% above and below nominal
would be entered as 100 for both low and high limits.
2.9.4 Enabling Pass/Fail Limits
Enabling the LIMIT SET will result in pass/fail lights and alarm activated to indicate
results of the measurement. The FAIL LO lamp lights if the measured value is below the
% of nominal entered for a low limit. The FAIL HI lamp lights if the measured value is
above the % of nominal entered for a high limit. The PASS lamp lights when the
measured value is between the two limits. The status of the audible pass/fail alarm is
dependent on the rear panel setting, i.e. it can be set to sound on a pass or a fail (refer to
paragraph 2.10).
To enable the limit comparator, press the [ENABLE] button (red light ON). It is
important to note that when the limit comparator is enabled the measurement
range is locked into the one currently selected. Also, when [ENABLE] is selected
the display automatically changes to show %, positive or negative with respect to
the nominal.
Value rather than % can be selected with the [DISPLAY] button.
2.10
PASS/FAIL Alarm Setting
By means of a rear panel switch the audible alarm can be made to sound on pass or fail,
based on results of the LIMIT SET. To change the alarm volume, rotate the silver rotary
switch clockwise to increase volume or counter clockwise to decrease volume.
To sound the alarm based on pass set the ALARM SIGNAL switch to PASS or good.
The alarm will sound when the LIMIT SET PASS lamp lights.
To sound the alarm based on fail set the ALARM SIGNAL switch to FAIL or no
good. The alarm will sound if either the LIMIT SET FAIL LO or FAIL HI lamp
lights.
