GDN Calibration Manual - Kele

90DM4 CALIBRATION PROCEDURE
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.
Table I - Calibration Information
Gas Scale Warm-up Notes
N2 0 - 2000 ppm 15 minutes
Figure I – Calibration equipment setup
CALIBRATION KIT
Standard Calibration Kit
Order Number Description
SKCO290DM3 STANDARD CAL KIT FOR 90DM3/90DM4/IAQPoint CO2, 103L N2
Low Cost Calibration Kit
Order Number Description
LCCO290DM3 LOW COST CAL KIT FOR 90DM3/90DM4/IAQPoint CO2, 17L N2
Password
* VA *
MainProg
Set Zero
GoCalib?
Yes
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