Atec 8000 Operation And Maintenance Manual Download

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140-072011 200/202 Series

Page 8 of 24

2. Installation and Operation

This section contains the steps necessary to install a new flow meter/controller into operation as quickly

and easily as possible. Please read the following thoroughly before attempting to install the instrument.

2.1.

Receiving Inspection

Carefully unpack the Hastings HFM-200/HFC-202 series instrument and any accessories that have also

been ordered. Inspect for any obvious signs of damage to the shipment. Immediately advise the carrier

who delivered the shipment if any damage is suspected. Check each component shipped with the packing
list. Insure that all parts are present (i.e., Flowmeter, power supply, cables, etc.). Optional equipment or

accessories will be listed separately on the packing list. There may also be one or more OPT-options on
the packing list. These normally refer to special ranges or special gas calibrations. They may also refer to

special helium leak tests, or high pressure tests. In most cases, these are not separate parts, but special
options or modifications built into the flow meter.

2.2.

Power Requirements

The HFM-200/HFC-202 series (bipolar 15 Volt version) require ±15 VDC @ ±30 mA / 1 Watt

(HFM-200) +60 mA, -185 mA / 3 Watts (HFC-202) for proper operation. The supply voltage should
be sufficiently regulated to no more than 50 mV ripple. The supply voltage can vary from 14.0 to 16.0

VDC. Surge suppressors are recommended to prevent power spikes reaching the instrument. The
Hastings power supplies described in Section 1.4.1 satisfy these power requirements.

The HFM-200/HFC-202 series (24 Volt version) require 14 - 32 VDC @ 1.9 Watts (HFM-200) and

4.2 Watts (HFC-202) for proper operation. The supply voltage should be reasonably regulated as power

supply ripple may propagate to the output. The supply common is galvanically isolated from the signal
common such that this instrument can be powered from a bipolar 15 Volt supply using only the positive
and negative output terminal (30 Volts). Surge suppressors are recommended to prevent power spikes

reaching the instrument.

The HFM-200/HFC-202 series instruments have an integral 5 VDC reference source. This stable

voltage is on pin 15 of the DA-15 connector (pin 1 of the DE-9 for 24 Volt) and may be used for the

command voltage.

2.3.

Output Signal

The standard output of the flow meter is a 0-5 VDC signal proportional to the flow rate. In the

Hastings power supplies, the output is routed to the display and is also available at the terminals on the
rear panel. If a Hastings supply is not used, the output is available on pin 6 of the DA-15 connector (pin

2 of the DE-9 for 24 Volt) and is referenced to pin 5 (pin 8 for 24 Volt). It is recommended that the load
resistance be no less that 2k

. If the optional 4-20 mA output is used, the load impedance must be

selected in accordance with Section 1.3.

Attempting to operate the 24 volt version for any significant length of time

the internal DC-DC convertors to fail.

Warning:

at a voltage less than the specified minimimum voltage will cause