Fluke 2680A, Руководство пользователя, Страница: 244 / 274

2680A/2686A
Users Manual
E-2
| separates alternative elements
″ ″
enclose literal characters or strings which must appear as shown (except for
case)
() enclose groups of elements to clarify the scope of other symbols
<equation>
= <add-term> { (“+” | “-”) <add-term> }
<add-term> = <mul-term { (“*” | “/”) <mul-term> }
<mul-term> = <exp-term> { (“**” <exp-term> }
<exp-term> = [ (“+” | “-”) ] <operand>
<operand> = <channel> |
<alarm status>|
<constant> |
<function> |
“(“ <equation> “)”|
“TOT” | “TS”
<channel> = “C” <digit> <digit> <digit>
<alarm status> “A” <digit> <digit> <digit>
<constant> = <mantissa> [ <exponent> ]
<mantissa> = ( {<digit> }“.” <digit> { <digit> } ) |
( <digit> {<digit>} [“.” {<digit>}] )
<exponent> = “E” [ “+” | “-” ] <digit> { <digit> }
<function> = <function-name> “(“ <equation> “)”
<function-name> =
“ABS” | “EXP” | “INT” | “LN” | “LOG” | “SQR” | “TOT” | “TS”
Note
The NetDAQ 2640A and 2645A use one or two digit channel
numbers. For example, the syntax is “C”<digit>[<digit>]. NetDAQ
does not provide the alarm status (A###), totalizer (“TOT”), or the
time of scan (“TS”) values for computed channel equations.