TM 10-3930-664-24 D. MEASURING DC VOLTAGE 1. SET UP AND ZERO MULTIMETER. a. Before using multimeter, check mechanical zero of meter.  If meter pointer is  not  exactly  over  zero  line,  reset  pointer by rotating adjusting screw. CAUTION Multimeter  must  be  set  to  a  voltage range higher than that being measured or multimeter damage may occur. 2. SET   MULTIMETER   SELECTOR   SWITCH   TO DC VOLTS RANGE. a. To   measure   5   volts   DC,   set   multimeter selector  switch  to  10  volts  DC  range.    To measure  24  volts  DC,  set  selector  switch to 100 volts DC range. 3. CONNECT MULTIMETER PROBES TO CIRCUIT BEING MEASURED. a. Connect  red  probe  to  positive  (+)  side  of circuit to be tested. b. Connect  black  probe  to  negative  (-)  side. Example   shows   24   volts   DC   measured across batteries. 4. READ METER AND DETERMINE VOLTAGE. NOTE If  needle  moves  off  scale  to  the  left, reverse probes on circuit. a. If  meter  is  set  to  10  volts  DC,  reading  is taken directly from scale. b. If meter is set to value other than 10 volts DC,    scale    reading    must    be    multiplied. Refer to Table 2-4. 2-235