ADS Environmental Services IETG FlowHawk QR 775012 A4 - Manual (Page 174)

External Power 5-3
DC Power Requirements and Consumption
To run on external power, the FlowHawk requires a power source
capable of supplying a minimum of 1 ampere of 12-volt regulated
DC power (12 V +/-10% as measured/available at the EMU or
EMUX, not at the power source output). When long cable runs are
required, size the supply and cabling to ensure that line losses do
not reduce the net power available to the EMU or EMUX. IETG
offers a power supply (p/n 5000-0727) for this application.
However, if you choose not to use this power supply, the alternate
power supply must be a high-quality industrial-type power supply
with ripple no greater than 250mV P-P.
To support FlowHawk monitors running in continuous mode, the
external DC power source must be capable of accommodating the
following system requirements concerning power consumption,
based on the wireless communication option (EMU or EMUX):
Note: The power to the monitor is ATEX/IECEx I.S.
compliant at 7-8 VDC.
 EMU Following are the power requirements for monitors that
communicate wirelessly through an EMU:
 Monitor and GSM Modem Operating in Standby
110 mA average (includes EMU, monitor, and GSM
modem standby currents)
 Monitor Firing the Peak Combo Sensor, GSM
Modem in Standby 238 mA average (for 3 seconds)
 Monitor Firing the Ultrasonic Depth Sensor, GSM
Modem in Standby 223 mA average (for 3.5 seconds in
a 36-inch pipe)
 Monitor Firing Sensors, GSM Modem Active (e.g.,
wireless diagnostics) 300 mA average
 GSM Modem During Communication, Idle 130 mA