‰  NOW 30 WPM  ‰  TEXT IS FROM OCTOBER 2017 QST  PAGE 38‰

DEVICE THAT YOU WANT TO MEASURE.  THIS IS A CHANCE TO ACCIDENTALLY BLOW THE
FUSE OR DAMAGE THE METER.  OFTEN WHEN CHECKING A CIRCUIT, YOU MIGHT MAKE
SEVERAL VOLTAGE AND CURRENT MEASUREMENTS, ONE AFTER ANOTHER.  THE PROBES
STAY CONNECTED TO THE RED AND BLACK TERMINALS FOR ALL THE TESTS.  IT IS
COMMON TO MEASURE A CURRENT AND THEN GO BACK TO MEASURE ANOTHER VOLTAGE.
IF YOU FORGET TO MOVE THE SECTOR SWITCH FROM CURRENT TO VOLTAGE, YOU WILL
DEFINITELY BLOW SOMETHING.  RESISTANCE IS MEASURED BY CONNECTING THE PROBES
ACROSS THE RESISTOR.  HOWEVER, YOU DO HAVE TO CUT OR UNSOLDER ONE END OF
THE RESISTOR SEE FIGURE, OR ELSE YOU WILL NOT MEASURE THE RESISTOR ALONE,
BUT THE PARALLEL COMBINATION OF THAT RESISTOR WITH WHATEVER OTHER
COMPONENTS ARE CONNECTED CROSS THE RESISTOR.  THE CONTINUITY POSITION SHOWN
IN THE LOWER RIGHT OF FIGURE 1 IS JUST A VARIANT OF THE RESISTOR
MEASUREMENT.  IF TWO POINTS ARE LINKED WITH A VERY LOW RESISTANCE
CONNECTION, THE OHMMETER CIRCUIT WILL DETECT THIS LOW RESISTANCE AND A BUZZ
OR BEEP WILL TELL YOU THE CONNECTION IS GOOD.  THE INSTRUCTION BOOK FOR THE
METER SAYS THE BUZZER WILL SOUND IF THE RESISTANCE BETWEEN THE TWO POINTS
‰  END OF 30 WPM TEXT  ‰  QST DE W1AW  ƒ