Manual 02007
DSLC Digital Synchronizer and Load Control
Woodward
87
Remote Load Reference Input
This test verifies the operation and calibration of the Remote Load Reference
Input.
Connect a jumper between terminals 34 and 35 for testing with a milliamp
source. If a voltage source is to be used, do not install the jumper. Calibrate the
control with the type of source to be used in service as there is a slight difference
in calibration between milliamp and voltage input. Select the Remote Input on
Menu 6. The value displayed should be 0.0 ± 0.1 mA. Connect an adjustable 20
mA source (or 1–5 Vdc source) to terminals 35 (+) and 36 (
). Set the source to
4.0 mA (1.0 Vdc). The Remote Input on Menu 6 should indicate 4.0 ± 0.1 mA.
Set the source for 20.0 mA (5.0 Vdc). The Remote Input should indicate 20.0 ±
0.1 mA.
To calibrate the Remote Input, select Calibration Menu 6 and set the Calibration
Key to 49. Select the Remote Input set point, also on menu 6. Set the mA source
to 20.0 mA (5.0 Vdc). Adjust the Remote Cal set point for 20.0 ± 0.1 mA. Repeat
the above test to verify correct calibration over the input range.
Speed Control Output
This procedure “zeros” the Speed Bias Output. Open all discrete input switches.
Select Calibration Menu 6 and set the Calibration Key to 49. Connect a dc
voltmeter to terminals 32 (+) and 33 (–). Select Speed Bias Output on Menu 6.
Verify that the speed bias output is at 0%. Cycle the power to the DSLC control
to reset the speed bias output back to 0%. Press either “Turtle Up” or “Rabbit Up”
key until the meter indicates 0.0 ± 0.1 Vdc.
Note that the range calibration of this output is not required for closed loop
operation.
Voltage Regulator Output
This procedure “zeros” the Voltage Bias Output for voltage regulators with a dc
Voltage Aux input. Select VAR/PF Control Mode on Menu 4 and set to Disabled.
Press the “SAVE” key. Remove power to the DSLC control for 10 seconds. Open
all discrete input switches. Turn on power to the DSLC control. Select Calibration
Menu 6 and set the Calibration Key to 49. Connect a dc voltmeter to terminals 30
(+) and 31 (–). Select Voltage Bias Output on Menu 6. Press either “Turtle Up” or
“Rabbit Up” key until the meter indicates 0.0 ± 0.1 Vdc.
If the VAR/PF Control Mode was previously Enabled, select VAR/PF Control
Mode on Menu 4 and set to Enabled. Press the “SAVE” key.
Note that range calibration of this output is not required for closed loop operation.
Relay Driver Outputs
This section tests the operation of each of the relay driver outputs from the
control. Tests require a voltmeter and a 250 to 1000 ohm resistor (minimum 3
watts). Generator Voltage must be removed, all discrete inputs open, and the
Test Key set point on Menu 9 set to 49 to do the following tests.