Campbell CR800 Spécifications télécharger pdf (Page 236)

Section 8. Processing and Math Instructions

Tan Function Example

The example uses Tan to calculate the tangent of an angle from a Volt(1) input.

Dim Degrees, Pi, Radians, Ans 'Declare variables.

Pi = 4 * Atn(1) 'Calculate Pi.

Degrees = Volt(1) 'Get user input.

Radians = Degrees * (Pi / 180) 'Convert to radians.

Ans = Tan(Radians) ‘The Tangent of Degrees.

TANH (Source)

The TANH function returns the hyperbolic tangent of an expression or value.

Syntax

x = TANH (Source)

Remarks

The TANH function returns the hyperbolic tangent [ tanh(x) = sinh(x)/cosh(h) ]

for the value defined in Source.

TANH Function Example

The example uses TANH to calculate the hyperbolic tangent of a voltage input.

Public Volt1, Ans 'Declare variables.

VoltDiff(Volt1,1,mV5000,1,True,100,500,1,0)

'Returns voltage on Channel(1) to Volt(1)

Ans = TANH( Volt1 ) 'The Hyperbolic Tangent of Volt1.

TimeIntoInterval (TintoInt, Interval, Units)

The TimeIntoInterval (or IfTime) instruction is used to return a logic level of

True or False based on the datalogger's real-time clock.

Syntax

Variable = TimeIntoInterval( TintoInt, Interval, Units )

If TimeIntoInterval ( TintoInt, Interval, Units )

Remarks

When encountered by the datalogger program, the TimeIntoInterval statement

is evaluated True (-1) or False (0) based on the datalogger's real-time clock.

Time is kept internally by the datalogger as the elapsed time since January 1,

1990, at 00:00:00 hours. When the Interval divides evenly into this elapsed

time, the TimeIntoInterval is set True. The TimeIntoInterval instruction can be

used to set the value of a variable to -1 or 0 (first syntax example), or it can be

used as an expression for a Condition (second syntax example).

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Campbell CR800 Spécifications Page 236