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kit (P1879-NO2/VC) from Conspec and follow the instructions to perform a calibration.
The user may also send the unit to the distributor or directly to the factory for calibration.
VII) CALIBRATION PROCEDURE
NOTE: All Conspec Smart Gas Monitors are fully tested and calibrated before
shipment. Calibration is the process of setting two distinct points for the Nitrogen
Dioxide monitor to reference. All NO2 readings are derived from these two
reference points. The first reference point is referred to as “ZERO GAS”
representing a total absence of NO2 and is obtained by injecting zero air into the
sensor. The seNO2nd reference point is referred to as “SCALED GAS” and can
be either half-scaled (½ of full range or 10ppm) or full scaled (full range or
20ppm) NO2 and is obtained by injecting a known concentration of NO2 into the
sensor. The proper application of the calibration gases is essential to the correct
operation of the P2621-NO2/VC.
Place the strap of the P1879-NO2 Calibration Kit over the P2621-NO2/VC so that
the case hangs below the monitor. Use the supplied hex-key to loosen the tamper-
proof screw in the lower left-hand corner of the P2621-NO2/VC’s door. Use a
standard flat blade screwdriver to loosen the remaining three door retaining
screws. Open the door of the P2621-NO2/VC and locate the 20 header-pin
Connector marked “J2" in the middle of the left edge of the P2065 Smart Monitor
Card. Plug the P2621-P programmer into the “J2" Connector on the P2065 card
so that the “J2" graphic on the P2621-P plug is located uppermost. Open the top
half-door of the P1879-NO2 calibration kit and locate the P3013 calibration
adapter. Insert the P3013 calibration adapter into the bottom of the P2057 NO2
sensor by pushing upward while twisting. Install a 0.5 liter per minute regulator
on each gas cylinder. Connect a 3' section of flexible tubing onto the barb of each
regulator. Follow instructions under “Manual Calibration.”
MANUAL CALIBRATION (This is Function “011" in CONFIGure Mode).
NOTE: DO NOT ENTER FUNCTION 11 UNLESS A GAS CALIBRATION IS TO BE
PERFORMED. STEPPING THROUGH FUNCTION 11 WITHOUT APPLYING
THE CALIBRATION GASES WILL ERASE THE PREVIOUS CALIBRATION
SETTINGS RENDERING THE MONITOR INOPERATIVE UNTIL A PROPER
CALIBRATION IS PERFORMED.
1. Depress the “CONFIG/4" Key for 2 seNO2nds. The message “ENTER ACCESS
CODE” will scroll across the 3 digit LCD .Press Key “4" once to remove the
prompt. The LCD will read “000" (Waiting for operator to key in access CODE).
2. Press Key 3 once. The LCD will read “001" (Access CODE factory set.)
3. Press Key “4" twice to enter the Access CODE of “001".The message “CONSPEC
Ver#” will scroll across the LCD (Software Version Number).
