Smart Photoionization Detector Module PIDS3
User Manual
PIDS3 - User Manual (en) - 1.03.docx
Analytical Control Instruments GmbH, Volmerstraße 9A, 12489 Berlin, Germany, www.aci-berlin.com
Page 28 of 58
10
Calibration
The calibration must be done at regular intervals in accordance with applicable national and regional
regulations. The device must be calibrated after installation.
The module supports a two-point calibration where two gases are required:
•
ZERO gas - clean pollution-free air
•
SPAN gas - VOC with known concentration (ISOBUTENE for standard calibration method)
Standard calibration gas: 100 ppm isobutene in synthetic air
USAGE
–
CHOOSE THE RIGHT SPAN GAS CONCENTRATION
To achieve the best accuracy, it is recommended that SPAN gas concentration is in same
range as the expected measurement result and fits to detection range of the module.
The procedure step by step:
•
Connect and start the measurement on the module as described (Action
‘start’)
•
Apply ZERO gas
•
Read the measurement values from the module and wait for stabilizing (Action ‘values’)
•
Keep the compensated current value for ZERO calibration point
•
Apply SPAN gas
•
Read the measurement values from the module and wait for stabilizing
(Action ‘values’)
•
Keep the compensated current and concentration values for SPAN calibration point
•
Write the calibration data back to module (Action ‘write’)
•
On successful calibration verification save calibration data to module
(Action ‘verify’ and Action ‘save’)
PID signal [pA]
0
1000
Time
[sec]
0
60
180
Apply fresh air
(0 ppm)
Apply calibration gas
(100 ppm)
1
st
calibration point
e.g. 23 pA
2
nd
calibration point
e.g. 1218 pA