Brooks Instrument 5800S Series - Manual (Page 7)

Models 5800-S
Installation and Operation Manual
X-TMF-5800S-MFC-eng
PN 541-C-051-AAG
November, 2008
7
•
Output damping provides a constant scale reading under fluctuating flow rate
conditions. Standard factory setting: 0.5 sec.
•
Output limiting prevents possible damage to delicate acquisition devices by
limiting the output to 0-5.25 Vdc on the voltage signal output and 0-21 mA on
the current output.
An alarm (TTL open collector) signal output is available to the user. If the
instrument’s specifications are exceeded, either by process conditions or by the
device itself, an alarm signal can be generated.
MASS FLOW CONTROLLER
Standard features include:
•
Each Smart Mass Flow Controller is provided with an adaptive valve-control
algorithm for the maintenance of stable flow control, even under varying
process conditions (pressure/temperature).
•
Setpoint source selectable: Setpoint signal source for the Mass Flow
Controller can be selected from:
- communication (RS232 / RS485) or
- 0-5 Vdc or
- 1-5 Vdc or
- 0-20 mA or
- 4-20 mA.
•
Fast Response Control provides rapid gas settling times with minimal over/
undershoot. Standard factory setting: 1 sec. for 5850/51 and meter models,
3 sec. for 5853.
•
Valve Override (VOR, availabe at pin 12) allows the user to fully open or
close the control valve independently of the set-point.
•
Low flow cut-off prevents the valve from opening whenever the Set point is
less than 1% of full scale.
Digital communication features
Digital communication, via RS485 or RS232, provides access to all of the Smart
TMF’s functions, including:
Accurate mass flow measurement and Set point regulation (controller
only), as a percentage of full scale and in selectable engineering units
•
Flow totalizer
•
Ambient temperature
•
Operational settings
⇒
Calibration (storage of up to 10 calibration curves)
⇒
Controller settings (controller only)
•
PID settings
Section 1: Introduction