Teledyne powerpod 400 Manual Do Utilizador

 

Page 16 of 42

 

8.5. SETTING A CHANNEL TO AUTO CONTROL 

 

 
 
 

Press the desired CHANNEL # key.  An asterisk appears in the first space on the line representing the 
selected channel.  The meter display is immediately replaced with the current set point.  Pressing the 
AUTO key causes pin number eight (8) of the 15 pin Sub-D connector to float and returns the previously 
programmed metering function to the display.  Pin 14 signal levels are now available for control. 

8.6. SETTING A CHANNEL TO DIRECTLY METER INCOMING SIGNALS 

 

 
 

 
 
 

Press the MODE key.  The MODE menu appears in the display.  To select METER, press 1, and then 
ENTER.  The METER menu allows the selection of the desired channel.  Press the number key that 
corresponds with the desired channel followed by ENTER.  The previously programmed display returns 
with the selected channel reading the signal between pins 5 and 6 of the corresponding channel’s 15 pin 
D-connector (J1 – J4). 

8.7. SETTING A CHANNEL TO DISPLAY THE TOTALIZER FUNCTION 

The POWERPOD-400 provides an integrated (Riemann Sum) value of the incoming signal for each 
channel. 

 

 

)

*

*

(

∑

=

,  where:  

⎪

⎪
⎭

⎪

⎪
⎬

⎫

⎪

⎪
⎩

⎪

⎪
⎨

⎧

=

=

=

=

 

 
Each channel samples the incoming signal at a rate 
corresponding to the preset A/D conversion rate in Hz.  At 

each sampling interval, the TOTALIZER function multiplies 
the average signal, as a fraction of the full-scale value (5v, 10v 
or 20 mA), times the span, or cal, value.  This results in a rate 

for that interval.  Next, a time element factor is determined 
according to the flow rate programmed for that channel as 
follows. 
 

For a time element of seconds, the factor is 1/10. 
For minutes, the factor is 1/600. 
Hours use a factor of 1/36000. 
 
Each calculation is summed and stored for a TOTAL value.