Detcon PI-700 - Manual (Page 20)

Model PI-700
PI-700 Instruction Manual Rev. 2.5 Page 16 of 54
Material Requirements:
 Detcon PN 327-000000-000 MicroSafe™ Programming Magnet
 Detcon PN 613-120000-700 700 Series Splash Guard with integral Cal Port and Calibration Wind
Guard (P/N 943-000000-000) - OR -
 Detcon PN 943-000006-132 Threaded Calibration Adapter
 Target Span Gas (See Detcon for Ordering Information) representing the target gas (with air or N
2
balance) between 10% and 90% of the full-scale range - OR -
 Isobutylene Span Gas. Recommended span gas is 50% of range with Isobutylene in air or N
2
balance
 Detcon P/N 985-241100-321
In-Line Humidifying Tube 24"
NOTE 1: Contact Detcon for Ordering Information on Span Gas cylinders.
NOTE 2: For span, an Isobutylene gas concentration of 50% of range is normally
recommended (see Note 4). 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 strongly recommended to use the target VOC gas to calibrate for span. This
eliminates any possibility that Isobutylene cross-calibration is not accurate. Cross-calibration
by use of other gasses should be confirmed by Detcon or at a minimum executed relative to the
information provided in Table 5.
NOTE 5: The Calibration Wind Guard must be used when the Splashguard Adapter with
integral Cal Port is used. Failure to use the Calibration Wind Guard may result in an inaccurate
AutoSpan calibration.
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 the instructions “a” through “e” below for AutoSpan calibration.
a) Verify that the AutoSpan Level is equal to the Calibration Span Gas Concentration. (Refer to View
Sensor Status in Section 3.5.1.) If the AutoSpan Level is not equal to the Calibration span gas
concentration, adjust the AutoSpan Level as instructed in Section 3.5.2 Set AutoSpan Level.
b) From Normal Operation, enter Calibration Mode by holding the programming magnet over PGM1 for 3
seconds. Note, the “◄” prompt will show that the magnetic switch is activated during the 3 second hold
period. The display will then scroll “PGM1=AutoZero . . . PGM2=AutoSpan”. Hold the programming