Unit Selection, Fig 1.1
2. Set ZERO/TARE reading in GAUGE mode only (Line 1, Pt knots).
a) Vent the system by switching the x2 isolator valves to OPEN position, anti-clockwise about 3-5 turns
both the Pressure and Vacuum control knob, switch on the VENT valve
b) Select Line 1 psi (gauge mode).
c) Wait for few seconds to stabilize the pressure, press PSI 1 + RET keys concurrently (Fig 2.0)
d) Line 1 should now read 0.000 psi ±0.001.
3. Set ZERO/TARE reading in GAUGE mode only (Line 2, Ps feet).
a) Vent the system by switching the x2 isolator valves to OPEN position, anti-clockwise about 3-5 turns
both the Pressure and Vacuum control knob, switch on the VENT valve
b) Select Line 2 psi (gauge mode).
c) Wait for few seconds to stabilize the pressure, press PSI 2 + RET keys concurrently (Fig 2.0)
d) Line 2 should now read 0.000 psi ±0.001.
Note: To increase accuracy of the measurement. When the reading is >=0.005 psig in VENT
mode, user need to re-zero reading of Line 1 and Line 2 when selected either psi, mbar, inHg,
hPa unit;
Zero key is disable when user selected Absolute, knots or feet unit.
Line 1 or Line 2 zero selection, Fig 2.0
