Calibration
System calibration is necessary for the device to accurately sense gas and to send messages to the transmission controller
in relation to gas presence in parts per million. Each time a sensor is replaced the device must be re-calibrated.
The Notis Quad is equipped with a dual set of switches for
MENU
,
ADD,
SUB
and
BACK
.
The manual and magnetic
switches are located on the Front Panel. Manual switching may be used in calibration when the Otis explosion-proof
enclosure lid is removed. The magnetic switches, for non-intrusive calibration, are activated by an Otis Instruments, Inc.
distributed magnet.
NOTE: Each sensor must be nulled/calibrated individually. After all steps in this section are complete for
Sensor 1, repeat the instructions for each consecutive sensor.
NOTE: Do not cover the hole in the calibration cup, as this will cause the calibration to be inaccurate.
NOTE: For best results, calibration should be performed using individual gases (per sensor type). Otis
Instruments does not recommend using quad gas mixtures.
NOTE: Any mixture of calibration gas other than a 50% Methane (2.5% by volume) with air balance usage
will result in damage to the sensor element—and will void warranty of the element.
Nulling the Sensor
1. Touch and hold an Otis Instruments, Inc. distributed magnet against the
MENU
indicator label on the left side of
the Notis Quad for approximately six seconds to active
MENU
and enter Menu Mode.
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