Ametek SHPF3 Series, Инструкция по эксплуатации и техническому обслуживанию

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Operation SHPF3 SCR Power Controller
12 Ametek HDR Power Systems Rev 2
a. If Option CR or PR is installed, set the 10-turn CUR/PWR potentiometer to its mid-point.
b. Set the
ZERO
and
SPAN
controls fully CCW (counterclockwise).
c. Connect a voltmeter across terminals X1 and X3 of the SHPF3. Set the voltmeter range to
measure full input voltage.
d. Close the fused disconnect or circuit breaker to apply power to the SHPF3. Turn the Process
controller on and set to demand zero power output.
Figure 4.2 Process Controller Input Connections
e. Adjust the
ZERO
control CW until the output just turns on, then turn the
ZERO
control CCW just to
the point where the output voltage reading is zero.
f. Set the Process controller to demand 100% output. Observing the voltmeter, adjust
SPAN
CW
just to the point where the reading is below the maximum output voltage. Then adjust
SPAN
CW
just to the point where the meter reading is at maximum.
g. Repeat steps 4.3e and 4.3f as necessary, to ensure proper control adjustments have been made.
h. Turn off the line power to the SHPF3 and disconnect the test equipment. The SHPF3 is now
ready for automatic operation.
i. If Option CR or PR is installed, adjust the
CUR/PWR
potentiometer CW until the output is limited
to the desired level.
4.4 Remote Manual Control with a Potentiometer
Some applications only require a manual control input and not a closed loop input from a process
controller. This potentiometer may be located on a remote panel near other controls related to the
process being powered by the SHPF3. It may be calibrated to correspond to a percentage of rated
power output, process temperature, or some other parameter. The potentiometer may by 500
Ω to 5
k Ω , and should be rated at 1/2 watt, minimum.
a. With the power to the SHPF3 turned off, connect the potentiometer as shown in Figure 4.3. The
CW position is the full power output position. Terminal TB1-5 is internally connected to a positive
dc voltage source.
WARNING - ELECTRIC SHOCK CAN KILL
HAZARDOUS VOLTAGES
exist at the output terminals and at the load when
the input voltage is connected. This condition exists even when the Controller is
set to deliver zero output. Always remove power and properly lock out power to
the unit before attempting any service, including the load.