Instruction manual

Instruction Manual Smart-Trak
®
50 Series
IM-50 Rev. A.2 28
50 Series Features
Setpoint Adjustment
The setpoint (command) input signal you supply to the 50 Series must be a direct linear
representation of 0% to 100% of the mass flow full scale value. Apply the setpoint signal
per Chapter 2. A setpoint value of 0 VDC or 4 mA will regulate the flow to 0% and a
setpoint value of 5 VDC or 20 mA will adjust the flow to 100% of the instrument’s full
scale range.
When the setpoint (command) signal is applied, the flow controller will reach the setpoint
value within two seconds to within ±2% of the selected flow rate.
CAUTION! DO NOT LEAVE A SETPOINT APPLIED FOR AN EXTENDED
PERIOD OF TIME TO A CONTROLLER WHEN THE GAS SUPPLY IS
SHUT OFF OR BLOCKED.
Damage may result and the instrument will become hot to the touch.
Setpoint Adjustment
If you believe your instrument requires a zero adjustment, allow the instrument to warm
up for at least 15 minutes at your operating conditions (Orientation, Temperature, and
Pressure), be sure there is ZERO flow through the instrument. Remove the silver screw
to expose the zero adjustment port and push the zero button. This performs an automatic
zero adjustment, if you believe you performed this adjustment incorrectly, repeat the
steps above.
Remove the silver
screw to expose
the zero
adjustment port