METER ZL6 - Status Lights; Batteries

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ZL6
After completing the self-tests, the ZL6 will indicate success or failure by lighting either the
green or red status light.
A solid green light (for approximately 20 s) indicates that internal tests passed and there is
successful communication over the cellular network.
A solid red light indicates an error in the logger, which may indicate
• corrupt ZL6 logger firmware
• low batteries, or
• unsuccessful cellular communications (ZL6 and ZL6 Pro).
Use ZENTRA Utility to identify where the self-tests may have failed (Section4.1) or consult
troubleshooting to resolve logger errors (Section5.2).
3.2.4 STATUS LIGHTS
Lights near the TEST button indicate the status of the ZL6. A green light is labeled OK and a
red light is labeled ERROR. There are several possible status states:
• The green light gives a short, single blink every 5 s to indicate the ZL6 is configured to log
sensor data.
• The green light blinks slowly (1 s on, then 1 s off), to indicate the logger is communicating to
a computer or using the cellular module.
• The green and red lights blink together during self-test procedures (after pressing the TEST
button or pulling the battery tab).
• The solid green or the red light at the end of the self-test sequence indicates the results of
the tests.
• The lights remain off if the logger measurement interval is set to Off (not logging).
3.2.5 BATTERIES
The ZL6 and ZL6 Pro is designed to use either AA NiMH rechargeable batteries or AA
alkaline nonchargeable batteries. The logger autodetects the type of batteries installed and
automatically adjusts the internal thresholds to represent 100% and 0% battery power. The
ZL6 Basic is designed for AA alkaline batteries.
NOTE: Do not mix NiMH and alkaline batteries together. Do not mix new and old alkaline batteries together.
Use NiMH batteries if the ZL6 or ZL6 Pro will be installed outdoors, where it can harvest
solar energy to charge NiMH batteries. Orient the ZL6 enclosure to expose the solar panel
to the maximum amount of sunlight available. In the northern hemisphere, this typically
means that the data logger will face south; in the southern hemisphere, this typically means
that the data logger will face north. There may be local obstructions that make another
orientation more favorable. The logger will charge the batteries even during periods of low
light levels (e.g., winter time or heavy overcast conditions). For extended periods of low