Calibration; Sensor Calibration - ANALOX Sub Aspida User Manual

ADM, HBOT & Sub Aspida
User Manual
9100-1060RK
6.2

Calibration

The sensors within the Aspida device should be calibrated periodically to compensate for the effect of
aging. It is therefore important that the sensors are periodically re-calibrated.
The regularity of calibration depends upon the sensor.
• Carbon dioxide sensors should be calibrated every 12 months.
• Oxygen sensors should be calibrated every 3 months and also when a new sensor is installed.
Additionally, if the unit is dropped or accidentally immersed this can affect the oxygen sensor
calibration so recalibration may be required. See section 6.5 below in case of accidental
immersion.
Since charging the batteries causes the unit to heat up which in turn causes some variation in readings,
it is inadvisable to calibrate the unit when actively charging the batteries or soon after.
6.3

Sensor calibration

Each Aspida offers an on-device calibration feature. The set of calibrations available on each Aspida
type are shown in the table below. In order for a calibration due notification to be cleared for a particular
sensor, the user must perform all of the calibrations available for the sensor. For example, an ADM
Aspida requires both a low and high oxygen calibration to be performed using calibration gas in order
to clear a calibration due notification, whereas a Sub Aspida and a HBOT Aspida need only a high
oxygen calibration in fresh air.
Aspida type
Sub Aspida
HBOT Aspida
ADM Aspida
WARNING: Always ensure that the calibration gas is suitable for use. Inaccuracy in calibration
of the unit will cause an inaccuracy of the displayed and alarmed values. Certified calibration
gas should always be used when calibrating CO
HBOT Aspida: For accurate measurements of high concentrations of O
recommend that the device is calibrated on 100% O
To perform a sensor calibration:
1) Press the button to access the device menu.
2) Use the button multiple times to highlight the
right) and press
3) Using the and
calibration value corresponding to the calibration gas used.
Document ref: PSA-811-14
1 x 20l 100% N2
1 x Fine control valve and tubing
Replacement O2 sensor and extraction kit
Carbon dioxide calibrations
available on device
High and low
High and low
High and low
.
. Buttons and and
June 2017
Copyright © 2017 Analox Ltd. All Rights Reserved.
Commercial in Confidence
Oxygen calibrations available
on device
High cal (fresh air) only
High cal (fresh air) only
High and low
sensors.
2
.
2
icon (initially off the display to the
icons, adjust the displayed value to the correct
Int. Approved
Analox would
2
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