Adjustment; Voltage Ref Offset; Voltage Ref Gain; Voltage Monitor Offset - Kenwood pds20-18 Service Manual

To obtain the best performance, periodically calibrate
the unit. Sometimes, only one mode need be
calibrated, while at other times, all modes should be
calibrated. When one mode is calibrated, it must be
noted that the other modes may be affected. When
calibrating all modes, perform the calibration in the
specified sequence.
The following calibration required an accurate
measuring instrument and an insulated adjusting flat
blade screwdriver.
If they are not available, contact your dealer. For
optimum adjustment, turn the power on and warm up
the unit sufficiently (more than 30 minutes) before
starting. Before calibrating the unit check the power
supply voltage.
1-1. Voltage
Turn on the POWER switch while pressing the PRESET 2, KEYLOCK/LOCAL and FAST/SLOW keys. (By
this, the PDS unit starts up in the adjustment mode.)
Connect the multi-meter with the output terminals on the rear panel.

1-2. Voltage REF Offset

1. Press the VOLTAGE key. (The VOLTAGE LED goes on.)
2. Press the PRESET 1 key. (The PRESET 1 LED goes on.)
3. Press the OUTPUT key. (The OUTPUT LED goes on.)
4. Adjust the voltage with the rotary encoder so that the multi-meter connected with output
terminal reads
5. Press the MEMORY key. (The PRESET 1 to PRESET 3 LEDs go on.)
6. Press the PRESET 1 key. (The PRESET 1 LED goes on.
1-3.

Voltage REF Gain

1. Press the Voltage key. (The PRESET 2 LED goes on.)
2. Press the PRESET 2 key. (The PRESET 2 LED goes on.)
3. Adjust the voltage with the rotary encoder so that the multi-meter connected with output
terminal reads following table.
Model
PDS20-18
PDS36-10
PDS60-6
4. Press the MEMORY key. (The PRESET 1 to PRESET 3 LEDs go on.)
5. Press the PRESET 2 key. (The PRESET 2 LED goes on.)

1-4. Voltage Monitor Offset

1. Press the VOLTAGE key. (The VOLTAGE LED goes on.)
2. Press the PRESET 3 key. (The PRESET 3 LED goes on.)
3. Wait until operation becomes stable (for about ten seconds).
4. Press the MEMORY key. (The PRESET 1 to PRESET 3 LEDs go on.)
5. Press the PRESET 3 key. (The PRESET 3 LED goes on.)

ADJUSTMENT

1 mV.
Setting[V]
20.500
36.900
61.500
PDS20-18/PDS36-10/PDS60-6
TEST EQUIPMENT R E Q U I R E D
The following instrument or their equivalent should
be used for making adjustment.
Test Equipment
Multi-meter
Shunt Register
SHUNT REGISTER
RUG-Z-100-0.1
100[
PDS20-18
PDS36-10
PDS60-6
Range[mV]
1
1
1
Model Maker
34401A HP
RUG-Z-xxx PCN
RUG-Z-1R-0.1
] 10[ ]
18