Model: 66618 Vehicle Monitor
User Manual
Calterm - N85 W12545 Westbrook Crossing Menomonee Falls, WI USA 53051
Technical Support: 1-800-624-4320, press 2
12V Battery 24V Battery
13.0V - 18.0V 26.0V - 38.5V 4 Green LED lit Full
Voltage is above the range possible for a battery.
Voltage bei ng applied to the syste m from some other
source (battery charger, alternator, extra battery).
Alternator is functioning properly
True battery condition UNKNOWN
12.4V - 12.9V 24.8V - 25.9V 3 Yellow LED lit Higher
The battery is at Very Good/Full state of charge
12.1V - 12.3V 24.1V - 24.7V 2 Yellow and red LED lit Moderate
The battery is approximately 60% charged
This is a Fair reading.
Monitor battery and battery system regularly
11.7V - 12.0V 23.3V -24.0V 1 Red LED lit Low
"LLL" appears if the
voltage is <11.7V.
"LLL" appears if the
voltage is 23.2V - 18.1V.
0 N o LED lit Too Low
Numerically Displayed value
Number
of bars
LED indication
Analysis
Bad
It is necessary to fully diagnosi s battery and the
automotive syste ms conditions
Battery and systems may need repair or replacement
Battery Charge
CAUTION- Refer to theis manual before using this tester
Read all operating instructions before use. Use extremecaution when checkign electrical systems, batteries and circuits to avoid injury due to electrical
shock. Calterm assumes basic knowledge of electricity on the the part of the user and is not responsible to any injury or damages due to improper use of
thethis tester.
INTRODUCTION
This instrument is designed for monitoring the voltage of 12V or 24V batteries. Easy to use, just insert it into the cigarette lighter socket. The display and
charging system will show the voltage of the battery; meanwhile the instrument will also give LED indication and bar indication, so you can determine the
charge level of the battery.
GENERAL SPECIFICATION
Display: LCD
Application: measuring 12V or 24V batteries and charging system voltage
Operation Temperature: 0℃ ~ 40℃, relative humidity < 75%
Storage Temperature: -10℃ ~ 50℃, relative humidity < 85%
Size: 132×48×31mm
Weight: about 54g
INSTRUCTION
OPERATING INSTRUCTIONS
Insert the plug of the instrument to the cigarette lighter socket, read the reading on the display, and observe the LED indication as well as the bar
indication in the battery icon.
By referring the following table, you can determine the charge level of the 12v or 24 batteries.
Note: If the battery voltage is more than 38.5V, the display will show the over-range indicator "EEE" and you should ask a qualified technician to check
the battery and the automotive electronic system.
NOTE
1. Remove from the cigarette lighter socket when not in use.
2. Don't use the instrument to measure a voltage higher than 38.5V.
3. Before use, verify the instrument's operation by measuring a known automotive storage battery.
Don't operate the instrument if it operates abnormally.
4. Do not operate the instrument around explosive gas, vapor, or dust.
1. LCD Display
2. Red LED
3. Yellow LED
4. Plug
5. Green LED
6. Battery Icon
The Numbers in this icon indicates
the charge level analogously.
7. Unit of measure
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