5: Basic Digital Multimeter (DMM) Operation Series 3700 System Switch/Multimeter
-8 Document Number: 3700S-900-
Voltage measurement procedure
WARNING If both the analog backplane connector and a switching module's
terminals are connected at the same time, all wiring and connections must
be rated to the highest voltage that is connected. For example, if 300V is
connected to the analog backplane connector, the test lead insulation for
the switching module must also be rated for 300V.
CAUTION Do not apply more than maximum input levels indicated or instrument damage
may occur. The voltage limit is subject to the 8 × 10
7
VHz product.
Perform the following steps to measure voltage:
1. Press the OPENALL key to open all switching channels.
2. Select the voltage measurement function by pressing the FUNC key until "DCV" or "ACV"
(as applicable) is displayed.
3. Use the RANGE ▲ and ▼keys to select a measurement range consistent with the
expected voltage, or press the AUTO key to select autoranging (AUTO annunciator turns
on).
4. Apply the voltage(s) to be measured.
5. If using a switching module, perform the following steps to close the desired channel:
a) Use the wheel to dial in the channel number.
b) Press the CLOSE key.
6. Press the TRIG key and observe the displayed reading. If the “Overflow” message is
displayed, select a higher range until a normal reading is displayed (or press the AUTO key
for autoranging). For manual ranging, use the lowest possible range for the best resolution.
7. To measure other switching channels, repeat steps 5 and 6.
8. When finished, press the OPENALL key to open all channels.