APPENDIX I
MODEL 268A-1T CHARGED PLATE ANALYZER
WITH VARIABLE TIMER OPTION
VARIABLE TIMER OPTION
The Model 268A-1T Charged Plate Monitor with
variable timer stop option has the same two timer
ranges as the standard unit when set in the "FIXED"
mode of operation. In the optional "VARIABLE" timer
mode, timing will start at either 5000 volts or 1000 volts
as selected by the user. The timer will then stop at a
user-selected voltage set on the front panel mounted
turns-counting dial from 0 to 1000 volts with 1-volt
increments.
This option is available either factory installed at the
time of purchase or as a factory installed aftermarket
upgrade to the basic Model 268A-1
VARIABLE TIMER OPTION OPERATING
INSTRUCTIONS
1. Power unit on.
2. Select either 5kV or 2kV plate voltage level
(measuring range).
3. Make sure NORM/PEAK button is in NORM
position (not depressed).
4. Set timer STOP LEVEL (turn pot) to desired plate
voltage stop level (0 to 1000 volts).
5. Press VARIABLE on TIMER LIMIT switch.
6. Select 5kV or 1kV timer start level on TIMER LIMIT
switch.
7. Select appropriate (+ or -) POLARITY for plate
voltage.
8. Press CHARGE button and adjust to voltage above
desired start voltage level.
9. Press
DECAY button.
10. Observe PLATE VOLTAGE indicator as it decays.
Timer indicator (SECONDS) will stop when variable
trip point is met.
11. For additional tests, repeat steps 8 thru 10.
Note: To return unit to normal operation, switch unit
to FIXED on the TIMER LIMIT switch.
268A-1 Rev. 11/98-RCA
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