Figure 26 - DSA 3017/3217 quick zero jumpering
DSA 3017/3217 Pneumatic Jumpering for “QUICK ZERO”
The DSA 3017/3217 series modules permit the use of the “quick zero” function even if the module is being
used in a stand alone mode. This is made possible by connecting CTL1, CTL2, and RTN. This pneumatic
jumper permits a quick zero without applying external control pressure logic. A single control pressure must
be applied to the CTL input. When the “Quick Zero” function is commanded, the logic to switch the valves
to the zero mode is generated internally. Refer to the Control Pressure Truth Tables in Figures 11 and 13
for more information. The pneumatic jumper is shown in Figure 26 below.
To Perform a “Quick Zero”:
1.
Insure that the Quick Zero jumper is installed as shown in Figure 26.
2.
Apply a constant 90 psi pressure to the CTL input.
3.
Execute a Zero Calibration by calling the
CALZ (CALIBRATE ZERO
) command.
Full Calibrations may be performed by a user. The recommended procedure is:
1.
Remove the Quick Zero jumper.
2.
Cap the RTN and PRG inputs.
3.
Connect 90 psi pressure toCTL1 and CTL2.
4.
Execute the CAL(CALIBRATE) Command.
5.
Remove the caps from RTN and PRG when the Calibration is complete and reconnect the Quick
Zero Jumper.
34
