Honeywell VA201T Calibration Handbook page 42

Calibration Handbook
4. Use the right pushbutton button to scroll to the Set Zero option and press the left pushbutton to confirm.
5. When GoCalib is displayed, press the right pushbutton button to display Yes.
6. Press the left pushbutton to start the Zero calibration.
7. A *Wait* message is displayed while the unit is being calibrated.
8. The calibration is complete when the display shows the Cal. Zero Complete message. The display
returns to the Menu Set Zero screen.
9. Use the right pushbutton button to scroll to the Quit field and press the left pushbutton to exit.
Calibrating the Span (units with display)
Access to the 90DM4 programming is achieved through push buttons located on the back of the device,
accessible through an oblong cut-out. The left hand button opens access to programming functions and
validates selections (equivalent to an Enter button). The right hand button scrolls through main programming
screens and increases values when in a specific programming screen.
Hold the unit (facing you) in both hands
Place both index fingers through the cut-out until they touch the left and right push buttons, respectively.
Press the left button to access the programming menus.
1. Turn on the regulator. The calibration gas is now flowing into the unit. Wait for 10 minutes minimum
to allow the reading to stabilize.
2. Press the left pushbutton to access the menu.
3. Use the right pushbutton to change each letter until the password VA is reached.
4. Press the left pushbutton to confirm each letter.
5. Use the right pushbutton to scroll to the Menu Set Span screen.
6. Press the left pushbutton to select.
7. In the GoCalib screen, press the right button to scroll to Yes and press the left pushbutton to start
the calibration.
8. Wait message appears, the transmitter will go into Span calibration.
9. The calibration procedure is finished when the Menu Set Span message appears.
10. Press the right pushbutton until the Quit screen is displayed and press the left pushbutton to exit.
90DM4 Calibration Information
Gas Scale Warm-up
N2 0 - 2000 ppm
Notes
15 min
42 90DM4