Time Electronics 7090 Pneumatic Calibration Hand Pump - Manual (Page 3)

3
7090 User Manual 3
3.
Operation
1. Connect the calibrator via a suitable adaptor and hose to the gauge port.
2. Connect the UUT to the process port via a suitable adaptor and hose.
3. Select the desired pressure/vacuum function using the slide switch (for example, if
pressure generation is required, using a suitable tool, push the slide pin in on the side of
the pump housing marked PRESSURE.
4. Close the vent knob by rotating it away from the pump housing (see note 5 in
operational notes).
5. For high pressure operation, back out the vernier control until the ring on the vernier
shaft is visible. Pump to pressurize. Screw in the vernier control towards the pump body,
the control will become stiff to turn, this is normal, the pressure will rise and easily
achieve maximum pressure (do not exceed 40bar or 600 psi).
6. To achieve maximum pressure, the bottom of the pump handles should be about 19mm
(3/4”) apart at the closest point when squeezed together. This is adjusted by the spring
tension adjuster.
7. To release pressure slowly, turn the vent control towards the pump body. To increase or
decrease the pressure slightly, use the vernier control.