
Performance Check/Calibration—Type 324
d. CHECK—Meter reading; 54 millivolts, ±3 millivolts,
(180 milliamperes, ±10 milliamperes, charge current).
e. ADJUST—Charge Rate adjustment, R644 (see Fig.
5-2), for a meter reading of 54 millivolts.
f.
Set the Power Pack switch (rear panel of power
pack) to TRICKLE CHG.
g.
CHECK—Meter reading; approximately 20 m illi
volts.
h.
Disconnect the precision DC voltmeter and the AC
power cord.
2. Adjust High-Voltage Supply and Check
O
Regulation
a. Set the Power Pack switch to EXT DC.
b. Install the power pack in the Type 324.
c. Connect the variable DC power supply to the EXT
DC POWER input jacks with the banana-plug patch
cords (be sure to observe correct polarity; red positive,
black negative).
d. Set the variable DC power supply for a +8-volt
output.
e. Set the POWER switch to ON.
f. Connect the DC voltmeter (VOM )2 from point J
on the H.V. Power Supply board (see Fig. 5-3) to
chassis ground.
g. CHECK—Meter readings; —1900 volts, ±38 volts.
h.
ADJUST—High Voltage adjustment, R513 (H.V.
Power Supply board; see Fig. 5-3), for a meter reading of
— 1900 volts.
i.
Change the variable DC power supply output volt
age between +6 volts and +16 volts. Also, set the
INTENSITY control fully clockwise at +6 volts and
fully counterclockwise at +16 volts.
2
If the precision 2 kV voltage divider is available for use with
the precision DC voltmeter, it should be used for this step.
Fig. 5-3. Location of high-voltage test points and adjustments (H.V.
Power Supply board).
j. CHECK—Less than ±40 volts change in the high-
voltage output level.
N O TE
I f the high-voltage supply is o u t o f regulation,
check the regulation o f the low-voltage supplies
(step 7) before troubleshooting in the high-voltage
supply.
k. Return the variable DC power supply to +8 volts.
l
. INTER ACTION—May affect operation of all cir
cuits w ithin the Type 324.
3. Adjust Intensity Limit
O
a. Connect DC voltmeter (VOM) from the Intensity
Lim it Test Point on the H.V. Power Supply board (out
side end of R515, point Z; see Fig. 5-3) to chassis
ground.
b. Set the INTENSITY control fu lly clockwise (maxi
mum).
c. CHECK-M eter reading, 0.6 volt, ±0.03 volt (140
microamperes, ±17 microamperes). Take into account
any meter loading of R572 if the recommended volt
meter is not used.
5-10