Any time X is set to a value greater than ”1”, in the ”Time A to X
Counts” function, the Model 931A computes average output values, or the
% error. It does this by measuring the overall time for multiple contacts
(defined by X) and divides that time by the number of contact closures.
At the end of a test, the Model 931A displays and holds the Input and
Output values until pressing ARM/RESET, which begins a new test.
3.8.5.6
Contact Closures
>
1/second
“Rate of A” is generally used for calibration standards (transducers) with
output rates normally much greater than 1 Hz. Notice the values listed in
the Timer Configuration Menu. Remember that Trigger B and Debounce
B are not used in Custom Pulse transducer measurement functions.
1. Press the Timer CONFIG key to access the Timer Configuration
Menu.
With the cursor, select “Function” and press ENTER to
access the Timer Function menu.
2. In the Timer Function menu select “Rate of A” and press ENTER.
3. The ”Rate of A” Function also continuously updates the transducer
measurements during a test.
In this example, “Rate of A” was chosen based on the nameplate rating
of 0.00001 Whr/pulse. Dividing the number of Transducer Input Watts
by 0.00001 Whr/pulse and dividing by 3600 sec/hour gives a pulse rate of
approximately 20,000 pulses per second. The calculation is shown in 3.11
below.
(3.11) (718
.
8
W
÷
0
.
00001
W hr/pulse
)
÷
3600
sec/hr
= 19
,
966
pulses/sec
79
Summary of Contents for 931A
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Page 52: ...SOURCE LOAD B A C N Figure 3 12 3 Phase 4 Wire 3 Element Connections 36 ...
Page 90: ...Iout I1 V1 V2 V3 I2 I3 Figure 3 17 3 Phase 4 Wire 3 Element Transducer Test 74 ...
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