P 1000, 2000, 3000 & 5000 Ex
Ion Science Ltd
Page 17 of 41
Instrument Menu
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Calibration (continued)
Custom calibration
For increased accuracy you can perform a Custom Calibration. You will need a cylinder of calibration gas and
a regulator. 100ppm Isobutylene calibration gas at a flow rate above 250ml/min. P allows you to
custom calibrate using any gas from the Gas Table and any concentration from 10ppm. Use the IonPC
software to adjust the desired gas and concentration.
Custom Calibration Procedure
Have a cylinder of gas, regulator and zero carbon filter on hand before starting this procedure. The LAMP
calibration is only really necessary if the instrument is to be used for ppb applications on PhoCheck 5000.
Custom Calibration Procedure
Please ensure you are familiar with this entire calibration procedure before attempting to calibrate the
P instrument.
Note:
The calibration of the P instrument must be carried out in a clean air environment. Ensure
all parts of the calibration kit are available and ready for use.
1. Select Custom Calibration procedure – a tick '
' will appear to confirm the
selection. Pressing Enter allows the user to enter the Custom calibration
menu.
2. Scroll down and select the flashing ZERO
3. Remove the caps from both ends of the carbon canister included in the Cal Kit
Sample supplied with your P, remove the probe and filter from the
instrument and fit the carbon canister. Alternatively a known clean air supply can
be used. Note – the carbon canister simply pushes onto end fitting - do not force
and no turning is required.
4. Press the Enter key to start the ZERO process. A counter will count down showing
how long the canister needs to remain connected.
5. At the end of the count down a tick '
' will appear, indicating that the Zero has
been accepted. Press Escape.
6. Disconnect the carbon canister and replace the cap ends. The useful life of the
carbon canister will be shortened if the canister is open to atmosphere for
prolonged periods.
7. Scroll down and select the flashing VOC.
8. The next screen shows the gas and gas concentration you have previously set up
via the IonPC software. Select Enter.
9. A screen will show VOC, a gas bottle and a flashing highlighted number.
10. Present the instrument with the calibration gas and press enter, the number will
begin to count down showing how long the instrument needs to be presented
with the gas. A tick '
' will appear indicating that the calibration has been
accepted. Escape out of the calibration menu.
11. Now replace the instruments filter and probe ready for use.
12. Carry out a Bump Test to ensure calibration was successful. Instrument is now
ready for use.
If you are not successful in calibrating the instrument check the following points:-
The carbon canister may be contaminated
The calibration gas may be low or empty
If using a connector pipe there may be a kink restricting the flow of gas
PID lamp may require cleaning
PID lamp may need replacing
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