Series 810 Instruction Manual
Chapter 3 Operation
Figure 3-1 Component Location and DIP Switch Set-up of Mass-Trak
Setpoint Configuration (see Figure 3-1
)
The DIP switches located behind the front panel on the Mass-Trak flow
controllers are used to configure setpoint operation and the Automatic Shut-
Off feature. The DIP switches are not enabled on the 810M flow meter.
All Mass-Trak controllers are set at the factory with the automatic shut off
enabled. However, there is no default configuration for the set points.
Each instrument is configured at time of calibration to the customer's
specific requirements. Setpoint options include the on-board setpoint
potentiometer (accessible through a hole in the front panel), or externally
sourced 0-5 VDC or 4-20 mA setpoint. A factory installed option of 0-10
VDC input and output is also available. Consult factory if you are interested
in the configurations for this special option.
Move DIP switch 1 to the right (ON) to select the internal on-board setpoint
potentiometer. Move this switch to the left (OFF) to select an external
setpoint. This is also the position required if you choose to use a local
setpoint potentiometer.
Move DIP switches 2 and 3 to the right to select 4-20 mA setpoint input.
Move these switches to the left to select 0-5 VDC setpoint.
DIP switch 4 is for use with the special-order 0-10 VDC option. Consult
the factory for more information.
Move DIP switch 5 to the right to force the controller valve closed (auto
shut-off) whenever the setpoint is less than 2% of full-scale. Move this
switch to the left to disable the auto shut-off function. Remember that the
valve on the Mass-Trak controllers is not a positive shut-off type.
IM-81
3-3
