10
GENERAL OPERATION DLRO10HD
Out of the Box
First connect the test leads to their respective measurement terminals. To
simplify lead connection to the DLRO10HD the lid can be removed by lifting
it to approximately 45º from closed position and sliding it to the right.
Connect line power lead if line power is available. If the instrument is to
be operated from the internal battery, ensure that the battery is charged.
Care should be taken to avoid running down the battery to a very low level.
The lead acid battery requires charging at least every three months if the
instrument is not in use for long periods. Charging should be performed in
well, ventilated areas.
The DLRO10HD is switched on at the power and mode selector switch.
On switch on the LCD shows the battery level symbol and, if line power is
applied, the line voltage symbol.
It may be necessary to adjust the display contrast by repetitively pressing the
contrast adjust button. Contrast setting will scroll through its range from
min to max and back to min etc. The backlight ON/OFF button toggles the
state of backlight that will timeout if left on for more than
Test Process
Select the test mode required by rotating the mode selector the respective
icon. The range/current selector is set based on expected resistance value of
the device under test. Alternatively, use the 100μA, 2.5 kΩ range to obtain
an initial magnitude of the resistance and then select the most appropriate
range setting.
The TEST button starts and stops all tests. The two automatic (AUTO) modes
will only show a result on correct connection of test probes and stop current
flow on disconnection.
Measurement terminals
P1
C1
Line input
Line input fuse
Line connected
indicator
Power and mode
selector switch
Contrast adjust
Current flow
indicator
P2
C2
Probe LED indicator
plug/socket
HV warning
indicator
Backlight ON/OFF
Test active indicator
Test START/STOP
Line voltage
connected
Range selector
switch
Battery level
Over temperature
Noise present
Refer to user guide
High voltage
warning
