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19
Communicating
Powering and outputs on the EVM
Powering and outputs on the EVM
Battery
The battery is an internal Lithium-ion Rechargeable battery pack. The minimum hours of
operating time is 8 hours of continuous operation including setup time, run time, and
viewing your result time. This battery is not user accessible or replaceable.
The universal power adapter cord is a 10 to 16 volt power inlet (nominal 12VDC) with
1.5amps and is used as an external power source.
see "Checking battery power" in Chapter 3).
Charging
The rechargeable battery pack is charged by plugging in the universal power adapter
cord into the charging-port and into an electrical outlet. When using the EVM and the
power adapter, it will charge as you use the instrument. The estimated time to recharge
a fully discharged battery pack is approximately five hours. It is important to understand
that the USB connection/cable will not charge the internal battery. USB is used for
communication purposes only.
temperature sensor will read at a higher level. Thus, it is recommended to measure the
temperature when you are not charging the instrument.
About the Environment
If the environment you are in is above 40º C (104º F) when charging the
battery, then you will be unable to charge the battery. (Please see Appendix D
for screen warnings.)
Outputs
The digital output and/or analog output can be used to connect to external devices such
as a chart recorder or a light notification device. The monitor's digital out and analog
out channel are accessible through the Input/Output connector. The air velocity wand
also uses this connector. (The following diagram depicts the backside of the instrument
without the back cover and the black rubber casing removed.) For more information on
connecting and using a stereo plug, see Appendix D page 160.
NOTE: When the batteries are depleted and if you are charging the instrument, the
Power jack
Analog & Digital
Outputs
USB port
Figure 2-8: USB, power jack and digital output port
(For more details on battery power,
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