4 Getting started
36 NBM-550 Narda
The following settings are possible:
• 6/15/30/60 minutes: Auto zero every 6/15/30/60
minutes
• off: Auto zero function disabled
The default setting is 15 minutes.
Changing the setting
1. Open the Auto-Zero Interval function (MAIN/
MEASUREMENT SETTINGS/Next/...).
2. Use the arrow keys ▲/▼ to select the desired setting and
then press the OK key to confirm the setting.
Starting a zero adjustment manually
1. Open the MAIN menu.
2. Press the Zero function key.
A zero adjustment is performed and the instrument fi-
nally changes back to the measurement display.
Setting the auto off function
You can set the instrument to switch off automatically after a
specified time without any activity to protect the batteries
from being discharged.
The following settings are possible:
• 6/15/30/60 minutes: Switches off after 6/15/30/60
minutes
• off: Auto off function disabled
The default setting is 15 minutes.
Note: The auto off function is disabled during long-term
measurements using the Timer Logging function (see
“Recording measurements by timer control” on
page 80) and Conditional Logging function (see
“Recording conditional measurements (optional)” on
page 82).
Changing the setting
1. Open the Auto Power-Off function (MAIN/
MEASUREMENT SETTINGS/Next/...).
2. Use the arrow keys ▲/▼ to select the desired setting and
then press the OK key to confirm the setting.
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