RKI Instruments Gas Tracer 10,000 ppm - Manual (Page 42)

35 • Calibration Mode 10,000 ppm Gas Tracer Operator’s Manual
Calibration Mode
Calibration mode allows you to calibrate and bump test the PPM
sensor.
The optimum frequency of calibration depends heavily on how the
Gas Tracer is used. For example, instruments used daily may need to
be calibrated weekly or monthly, while instruments that are used only
a few times a year may need to be calibrated before each use. Typical
calibration frequencies range from monthly to quarterly.
You can program the Gas Tracer to notify you when it is due for
calibration. See “Updating the Calibration Reminder Setting” on
page 72.
Calibration/Bump Test Supplies and Equipment
To calibrate or bump test the Gas Tracer, you will need:
• Known calibrating sample of ppm methane gas
• A demand-flow regulator to provide adequate sample gas flow
• Non-absorbent tubing
• 6-inch humidifier tube
CAUTION: If you are using a calibration kit that includes a gas bag and a
fixed flow regulator or dispensing valve, do not apply gas
directly to the Gas Tracer with the regulator or valve or damage
to the pump will result. See “Appendix A: Calibrating or Bump
Testing with a Sample Bag” on page 97 for instructions to
properly use a gas bag kit.
Preparing for Calibration or Bump Test
Whether you will calibrate the Gas Tracer or perform a bump test, you
will need to set the fresh air readings first.
1. Find a fresh-air environment. This is an environment free of toxic
or combustible gases and of normal oxygen content (20.9%).
2. Turn on the unit as described in “Turning On the Gas Tracer” on
page 16. Use the sample hose and probe.