TM 5-6115-593-34 NAVFAC P-8-631-34 TO-35C2-3-463-2 (b) Connect the frequency meter to the output terminals of the generator set. (2) Test. (a) Start  and  operate  the  set  at  rated frequency and no load. (b) Close the switch (see figure 512.3.I) and use resistance, R1 to adjust the voltage   to   the   overvoltage   value specified in table 16-1.  The set has provisions   for   shutdown   upon   an overvoltage    condition,    it    will    be necessary  to  temporarily  deactivate this  provision  to  permit  adjustment of the overvoltage value.  This may be done by activation of the "protective bypass" (BATTLE SHORT) switch.  Do not deactivate the circuit interrupter trip circuitry. (c) Open the switch, reset the overvoltage   circuit   and   adjust   the resistance, R2, until voltmeter number 2 reads rated voltage. (d) Repeat  (b)  and  (c)  to  ensure  that the  specified  overvoltage  and  rated voltage settings are correct. (e) Set    the    oscillograph    chart    speed such   that   the   individual   waveform peaks  are  clearly  visible.    Set  the timing  lines  to  a  minimum  of  0.01 seconds   per   line   or   use   a   60   Hz time  trace.    Adjust  the  trace  peak- to-peak  amplitude  to  a  minimum  of one inch (or 25 millimeters). (f) Read    and    record    both    voltmeter readings. (g) With the oscillograph recording and the  circuit  interrupter  closed,  close the switch.  (See figure 512.3-I.) (h) Reactivate the shutdown provision if used. (i) The     generator     set     contains     an overvoltage    malfunction    indicator, check and record its indication. (j) Record whether or not the set shuts down. (k) Open the switch, reset the overvoltage     circuit     if     necessary, restart the set if required, and close the circuit interrupter. (l) Repeat  steps  (d)  through  (k)  above two additional times. d. Procedure II (Undervoltage). (1) Preparation for test. (a) Locate   the   input   terminals   of   the undervoltage    sensing    circuit    and connect the apparatus as illustrated in figure 512.3-I. (b) Repeat   step   (b)   of   paragraph 16-20c(1)(b). (2) Test. (a) Start  and  operate  the  set  at  rated frequency and no load. (b) Close the switch (see figure 512.3-I) and use the resistance, R1 to adjust the voltage to the rated value. (c) Open    the    switch    and    adjust    the resistance, R2 until voltmeter number   2   reads   the   undervoltage value  specified  in  table  16-1.    This test    shall    be    repeated    for    each under 16-17