Dynalyzer – Digital Display/Printer
OPERATION MANUAL
20
Applications
Typical Operating Sequence
The setup of the High Voltage Unit is described in separate data and must be read before
operating the unit. It is extremely important that the high voltage cable connections be properly
made and that proper insulating oil or grease be used. This procedure is detailed in the
INSTALLATION section of the High Voltage Unit manual.
1. After all connections are made, the Digital Display controls should be set as follows:
a. Set MA/MAS switch to MA.
b. Set TRIGGER SOURCE switch to KVP position.
c. Set TRIGGER MODE switch to PERCENT.
d. Set PROCEDURE switch to NORMAL.
e. Turn WINDOW DELAY control OFF.
f.
Set TRIGGER LEVEL control to 10%, (for single-phase; 75% [typical] for three-phase) as
displayed in the PERCENT/PRESET window.
g. Set KV display to A + C.
The RESET button does not have to be pushed because that function is automatic when the
Display power is turned on.
2. When the generator is turned on, press MANUAL TRIGGER switch to read standby filament
current.
3. Set KV DELAY to “0”. All parameters will be displayed at the end of the exposure.
4. Set the MA/MAS switch to MAS to read that value.
With the Display set up as described in Step 1, the functions will trigger when the exposure kV
waveshape reaches the appropriate percentage of the peak kV of the preceding exposure. As the
peak kV of each exposure varies, so does the trigger level of each successive exposure. The
percentage of the peak kV at which each exposure will trigger can be adjusted by use of the
TRIGGER LEVEL control. This percentage is displayed in the Percent window. If the trigger level is
to be carried intentionally for each successive exposure independent of other influences, the
Preset trigger mode can be selected. The Trigger level in kV will now be displayed in the PRESET
window. If it is desirable to exclude peak kV measurement at the beginning of an exposure
because of initial kV overshoot, the kV delay function can be employed to delay peak kV
measurement up to 20 msec (two cycles for single-phase). Triggering on a Percent or Preset basis
can utilize the mA exposure waveshape as described above if the TRIGGER SOURCE switch is
turned to mA.
