Instrument Overview - TPI SP620 User Manual

D. INSTRUMENT OVERVIEW
2
1. Input connection for pressure measurements. Inputs are
marked + and -.
2. SP620 status LED indicator.
Orange and blinking = Bluetooth not connected
Green and blinking = Bluetooth connected
Blinking Red with either of the above = Low battery
3. Power Key. Press and hold to turn the instrument on.
Press and hold to turn the instrument off.
4. Built-in magnet. Attach to
metal surfaces for hands free
operation. Ensure surface is
not hot.
5. Serial number location. Last
three digits are the product
identification number and
marked in bold. Use this num-
ber to distinguish between
models when several SP620's
are connected to a phone or
tablet.
6. Screw to open battery com-
partment. Turn the screw
counter clockwise until it is
just above the compartment
door. Lift on the screw to open
the compartment.
The inputs are marked + and -. Any pres-
sure connected to the - port will be sub-
tracted from the + port. For standard pres-
sure / vacuum measurements use the +
port only. Use the + and - port when per-
forming differential measurements.