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Update time is programmed with SW3 using hexadecimal numbers 0 - F. Refer to Table 3B (next page).
To find the minimum required update time (Umin) use the following procedure:
1) Select from Table 3B the switch setting for SW3 that yields the closest update time greater or equal to
Umin.
2) Verify the exact update time of the transducer with the following formula:
B.3 Example:
Given
• Null = 2 in.
• Stroke Length = 20 in.
• Resolution = 0.001 in.
Solution
1) From Table 1B, the corresponding resolution to
number of recirculations is N = 4.
2) The minimum
required update time using Formula
#1 (previous page) is:
Umin. = (2.5 + 2 + 20) x .01086 x 4 = 1.064 ms
3) Table 3B shows that the closest update time
greater or equal to Umin corresponding to N = 4 is
2.00 ms; therefore, SW3 = 1.
4) The exact update time using Formula #2 (previous
page) is:
U = (4 + 1) x (1 + 1) x .2 ms = 2 ms
FORMULA #2:
U = (N + 1) x (SW3 + 1) x 0.2 ms
where
N = Number of recirculations
SW3 = Switch setting in decimal
FORMULA #1:
U(min) = (2.5 + NULL + STROKE) x .01086 ms/in. x N
where
NULL = Null length in inches
STROKE = Stroke length in inches (1 to 300 inches)
N = Number of recirculations
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