DVM1190 GB
4
6.3. Battery
Saver
The standby mode is activated when no button is pressed for 30 minutes. Press HOLD or turn the selector to return to
the normal display mode. You can deactivate this feature by holding the yellow button when you turn on the device.
6.4. Relative Measurement Mode
The meter displays relative measurements for all functions except frequency measurements.
Choose the desired function with the selector and touch a circuit with the test leads. This circuit now forms the basis
for all future relative measurements. Press the REL button to store the measured value and activate the relative
measurement mode. The difference between the reference value and subsequent reading is displayed.
Hold the REL button for more than 2 seconds to return to the normal operation mode.
6.5. AC and DC Voltage Measurements
Do not attempt to measure voltages in excess of 1000VDC or AC rms. Do not apply more than 1000VDC or AC
between the common terminal and earth ground to protect the device from damage. The meter measures voltages in
the following ranges : 400mV, 4000V, 40V, 400V and 1000V (the 400mV AC range is only available in the manual
ranging mode.
1. Put the selector in the DCV, ACV or DCmV range.
2. Connect the black test lead with the COM jack and the red test lead with the V jack.
3. Connect the test leads with the circuit under test.
4. Read the display. The polarity of the red lead is indicated in case of a DCV measurement.
Remarks :
•
The device may display unstable readings, especially in the 400mV range, even though no test leads are connected
with input terminals. Make contact between the measuring tips of the leads connected to the COM and V jacks in
order to short these jacks if you suspect that the displayed value is incorrect. The display should read 0V.
•
Measure the AC voltage first for increased accuracy when measuring the DC component of an AC voltage. Take
note of this voltage and select a DC range higher than or equal to the measured AC voltage. This improves the
accuracy of the DC measurement and keeps the input protection from activating.
6.6. Resistance
Measurements
Disconnect the circuit to be tested and make sure that all capacitors are fully discharged before measuring the in-
circuit resistance. The meter measures resistances in the following ranges : 400
Ω
, 4000k
Ω
, 40k
Ω
, 400k
Ω
, 4000M
Ω
and 40M
Ω
.
1. Select the
Ω
range with the selector
2. Connect the black test lead with the COM and the red test lead with the V
Ω
terminal.
3. Connect the test leads with the circuit under test and read the displayed value.
Tips :
•
In order to ensure the greatest accuracy when measuring low resistances : short the test leads prior to measurement
and memorise the test probe resistance. Subtract the test probe resistance from the actual measured value.
•
Do not use the 40M
Ω
range for in-circuit resistance measurements.
•
The device may need a few seconds to produce a stable reading in the 40M
Ω
range, which is normal when
measuring high resistances.
•
The overrange indication “1” is displayed when the input is not connected e.g. in case of an open circuit