User manual

Model: EC-GOLD Dual
ECGOLDDUALUM12.doc Rev: 1.2
18
4.3 Calibration Procedures (Standard Feature Mode Without LCD / KEYPAD)
4.3.1 CALIBRATION NOTES
The EC-Gold Dual may be calibrated using a Single Point calibration procedure,
by using calibration push button.
The Calibration pushbutton may be accessed using a screwdriver or other fine
tool – See Figure 4.1 for the location of the access hole.
A full Dual Point calibration is always performed at the factory and involves zeroing the sensor in clean
air, then calibrating at a preset gas concentration. The Single Point calibration is typically used in the
field since it is more convenient. Also, it does not require clean air as one of the calibration points, since
clean air cannot be guaranteed in all installations. A Single Point calibration assumes the unit has
already been zeroed. This is always true for new units from the factory.
Figure 4.1
4.3.2 SINGLE POINT CALIBRATION
The calibration gas concentration value must be known. The unit comes factory set for Single
Point Calibration and 100 ppm CO or 10 ppm NO2. If either setting is in doubt, then see section
7, controller setting sheet.
1. Determine what Calibration gas concentration the EC-Gold Dual is expecting. This
value is listed on the packing slip and may be recorded in the back of the user manual
in the CONTROLLER SETTINGS sheet for future reference.