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World Leaders in Miniature
Infrared Sensor Technology…..
A Richbloom Holdings Company
PREMIER INFRARED SENSOR - MANUAL
CALIBRATION INSTRUCTIONS
Dynament Ltd
Premier House, The Village, South Normanton,
Derbyshire, DE55 2DS, United Kingdom.
Tel : 01773 864580
Fax : 01773 864599
Dynament Ltd
Hermitage Lane Industrial Estate, Kings Mill Way,
Mansfield, Nottinghamshire, NG18 5ER, United Kingdom.
Tel : 01623 651381
Fax : 01623 421063
www.dynament.com
e-mail : [email protected]
TDS0064
ISSUE 1.0
26/9/08
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AMENDMENT RECORD
Original date of issue:
26/9/08
Approved by:
Manual Title: Premier manual calibration instructions
Date
Modification
TDS0064
ISSUE 1.0
New
Issue
26/9/08
Approval
Signature
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Contents
1
PREMIER MANUAL CALIBRATION................................................. 4
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1 PREMIER MANUAL CALIBRATION
The following procedure only applies to sensors programmed with firmware version V1.5.2R.
Calibration of the Premier sensor can be carried out by use of the Tx and Rx pins as seen in Fig 1 and
Fig 2.
This procedure will only work when the Premier Sensor has been powered for a minimum of 10 minutes.
Note that the sensor must have the correct calibration gas level set in the configuration data to match the
gas concentration used during the calibration.
Note that the “Comms” options of the Premier sensor must be set to “Manual Calibration” mode, prior to
using the feature. The sensor behaves normally for the first ten minutes, after which time the
communications pins change to calibration inputs.
1.1
Sensor Zero
Output
ZERO
Rx
Tx
+
-
Fig 1
Ensure the sensor is in zero-gas environment.
Note.
1. Carbon Dioxide sensors cannot be zeroed in air due to the background levels of CO2. These
sensors must be zeroed whilst being exposed to 100% nitrogen.
2. Where a purging gas has to be applied, use a flow rate of between 200 and 600cc/min. Allow
sufficient time for the sensor to respond and for the reading to stabilise.
Connect the Rx pin to the sensor 0V supply for a minimum of 5 seconds to zero the sensor.
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1.2
Sensor Span
Always zero the sensor prior to performing a span operation.
Output
Rx
-
+
Fig 2
SPAN
Tx
Apply a known concentration of gas (applicable to sensor type) at a flow rate of between 200 and
600cc/min. Allow time for the sensor to respond and for the reading to stabilise.
Connect the Rx pin to the sensor 0V supply for a minimum of 5 seconds to zero the sensor.
Turn off and disconnect the calibration gas
Note that the Fig 1 and Fig 2 show the connections for a “POSITIVE” sensor. The connections for
“NEGATIVE” sensors are shown below in Fig 3.
Output
ZERO
Rx
Rx
-
SPAN
+
Fig 3
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