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DLRO10 and DLRO10X
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4.2 DLRO10X Main Menu Screen
When first switched on DLRO10X displays a copyright screen, followed by the Main
Menu screen.
This screen provides you with information such as battery charge remaining, index
number of the next test, number of tests already stored and the current date and
time.
This screen also provides access to the menu, through which you set up your
instrument and choose the desired test parameters. Navigation of this menu is by
means of the cursor control and Enter key.
4.3 Warning Messages
The Main Menu screen will from time to time also contain certain warning messages
4.3.1 Noise
Noise in excess of 100 mV 50/60 Hz will activate the message ‘Noise’ at the bottom of
the display. Above this level accuracy cannot be relied upon.
4.3.2 ‘C’ and ‘P’ Indicators
A good measurement requires both the current carrying circuit and the voltage
detection circuit to be completed by the item under test. DLRO10X checks for this
continuity. If there is poor continuity in either circuit a message will appear at the
bottom of the display. This will read “P OPEN CIRCUIT” if the voltage contacts are
high resistance, “C OPEN CIRCUIT” if the current circuit is not made or “CP OPEN
CIRCUIT” if both circuits are inadequate. Check the contacts, since a measurement
cannot be made if any of these messages is visible on the display.
4.3.3 External Voltage Warning
If external voltage is applied to the terminals a message “EXT VOLTS” will flash on the
display. This is a warning that the item under test is live and might be dangerous. A
test cannot be performed in this condition.
The “EXT VOLTS” message will flash if more than 50 V. is applied between either
voltage terminal and a current terminal. If the voltage appears between just the
voltage terminals or just the current terminals the message will appear at 100 V peak
or 5 V peak respectively.
Please note - The message will only appear if a voltage appears BETWEEN
terminals. The message will not appear if all terminals are at the same high
voltage. The message will not operate if the instrument is turned off.
4.4 Discharge Current Warning
A message CURRENT FLOW will appear if a current greater than 1 mA is still flowing
after a test is completed. This suggests that an inductive load has been tested and is
still discharging. Do not disconnect the current loop while the discharge warning is
showing.
4.5 The Menu
Use the Left and Right arrows of the cursor control to highlight the menu required.
Press the Down cursor control to see the options available on that menu. Select the
required option using the cursor control and press Enter to set that option. Depending
on the menu item selected the display will either present further options or will return
to the main menu screen.
