EM6100 Handheld Portable Ultrasonic Flowmeter Ver.8.08
Flomotion
Systems,
Inc.
EM6100
12
Housing Material
ABS
Case Size
3.4 x 2.6 x 0.79in
Handset Weight
1.2 lbs. with batteries
2. Starting Measurement
§2.1 Built-in Battery
The instrument can operate either from the built-in Ni-H rechargeable battery, which will last over 10
hours of continuous operation when fully recharged, or from an external AC power supply from the
battery charger.
The battery charging circuits employ a scheme of constant-current and constant-voltage. It has a
characteristic of fast charging at the beginning and very slow charging when the battery approaches to
full recharge. Generally, when the green LED starts coming on, the battery would be nearly 95%
recharged and when the red LED is off, the battery would be 98% recharged.
Since the charging current becomes tapered when the battery recharge is nearly completed, i.e. the
charging current becomes smaller and smaller, therefore, there should be no over-recharging problem.
That means the charging progress can last very long. The charger can be connected to the handset all the
time when an around-the-clock measurement is required.
When fully recharged, the terminal voltage reaches around 4.25V. The terminal voltage is displayed on
window M07. When the battery is nearly consumed, the battery voltage drops to below 3V. The user can
obtain an approximate battery working time from the battery voltage. A software battery working time
estimator is integrated in this instrument based on the terminal voltage. Please note that the estimator
may have relatively bigger errors in the estimated working time, especially when the voltage is in the
range of around 3.70 to -3.90 volt.
§2.2 Power On
Press the ON key to switch on the instrument and press the OFF to turn off the power. Once the flow
meter is switched on, it will run a self diagnostic program, checking first the hardware and then the
software integrity. If there is any abnormality, corresponding error messages will display.
Generally, there should be no display of error messages, and the flow meter will go to the most
