4
CAUTION: Resettable fuse will not protect meter if power supply voltage
exceeds maximum voltage specified for particular model.
In order to operate flow meter within the specification the cable length for analog
0-5 Vdc output and remote LCD display may not exceed 9.5 feet (3 meters).
Use of the FMA1700A/1800A flow transducer in a manner other than that speci-
fied in this manual or in writing from OMEGA
7
, may impair the protection provid-
ed by the equipment.
2.3.1 Remote LCD Readouts
FMA1700A/1800A Mass Flow Meters are available with optional remote reading
LCD displays supplied with a three foot long wire to accommodate most applica-
tions. This configuration includes the upper block element which serves as the
LCD readout mounting. Special lengths of remote extension wiring (up to 9.5 feet
[3 meters]) are available on request.
2.3.2 Panel Mounting Readouts
Another option for the FMA1700A/1800A Mass Flow Meter is the Panel Mounting
Remote Readout. In this configuration the LCD readout is supplied with a three
foot long extension wire, and no aluminum housing around the LCD. The LCD
readout for panel mounting includes a bezel with two plastic screws which conve-
niently fit into a rectangular cut-out for panel mounting (see Figure 2.b).
The power input is protected by 300 mA M (medium time-lag) resettable fuse. If a
shorting condition or polarity reversal occurs, the fuse will cut power to the flow
transducer circuit. Disconnect the power to the unit, remove the faulty condition,
and reconnect the power. The fuse will reset once the faulty condition has been
removed.
FIGURE 2.b -
CUTOUT DIMENSIONS FOR LCD PANEL MOUNTING