Detcon PI-700 0-500ppb - Manual (Page 18)

Model PI-700 0-500ppb
PI-700 0-500ppb Instruction Manual Rev. 0.0 Page 14 of 53
NOTE 1: Contact Detcon for Ordering Information on Span Gas cylinders.
NOTE 2: For span, an Isobutylene gas concentration of 50% of range is strongly
recommended. This should be supplied at a controlled flow rate of 500cc/min using the in-line
humidifying tube. Other concentrations can be used if they fall within allowable levels of 5%
to 100% of range.
NOTE 3: If Isobutylene is used as span gas, the correct Gas Factor must be used.
NOTE 4: It is OK to use the target VOC gas to calibrate for span. Cross-calibration by use of
other gasses should be confirmed by Detcon. Or at a minimum executed relative to the
information provided in Table 2.
CAUTION: Verification that the calibration gas level setting matches the calibration span gas
concentration is required before executing “AutoSpan” calibration. These two numbers must be equal.
AutoSpan consists of entering Calibration Mode and following the menu-displayed instructions. The display
will ask for the application of span gas in a specific concentration. The applied gas concentration must be
equal to the calibration gas level setting. The factory default setting and recommendation for span gas
concentration is 50% of range. If a span gas containing the recommended concentration is not available, other
concentrations may be used as long as they fall between 5% and 100% of range. However, any alternate span
gas concentration value must be programmed via the “Set AutoSpan Level” menu before proceeding with
AutoSpan calibration. Follow instructions “a” through “f” for AutoSpan calibration.
a) Connect the Cal Gas to the Sample Port as shown in Figure 12. Ensure that there is a 6” Vent Tube
connected to the ‘T’. Connect the other side of the ‘T’ to the Sample Port. Do not open the Cal Gas Flow
meter at this time.
AIR
FLOW
SPAN
PGM2
ZERO
PGM1
MODEL
PI-700
detcon inc.
VOC
Flow Regulator
1 LPM Fixed
6" Vent Tube
Sample
Port
Cal Gas
Cylnder
'T' Hose
Barb
Use Teflon
tubing only
500CC/mm
Flow Setup
Figure 12 Connection of Cal Gas