Rae QRAE 3, Руководство пользователя

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10.2.1. Bump (Functional) Testing
The same gas is used for a bump test as for calibration. A constant-flow regulator producing 0.5
to 1 liters per minute should be used, and the calibration adapter must be installed on diffusion
models. The instrument must be connected to a cylinder of calibration gas with supplied tubing.
Note:
Pumped models require a T calibration tube, as illustrated below.
1. Turn on your QRAE 3 by pressing and holding the [MODE] key, and allow the
instrument to boot up fully until the main measurement screen with sensor names and
readings is shown.
Important!
Make sure all of the instrument’s sensors have warmed up before performing the
bump test. The instrument will take the time to warm up the sensors prior to enabling access
to bump test menus. You can tell a sensor has warmed up if you see a reading next to it name
on the display. If it has not warmed up, you see three dashes (“--”) next to it.
2. Install the calibration adapter on the QRAE 3 if it is a diffusion model.
3. Turn on the gas to initiate flow.
4. Connect the instrument to the T calibration tube and connect it to the calibration gas.
5. Press Start ([Y/+] key) to start the bump test, or press [MODE] to quit. While the bump
test is being performed, the readings for each sensor are shown. Once the bump test
completes, pass/fail test results and readings are shown for each sensor.
Important!
If one or more sensors fails a bump test, be sure to calibrate those sensors.
6. The bump test is now complete. Press [Y/+] to exit and return to the Calibration menu.
If all the alarms and all sensors have passed and no sensor is due for a calibration, the
instrument is now ready for use.
Note: Make sure pressure in
the calibration gas cylinder
is higher than 100 psi when
using a T calibration tube
(pumped models only).
Diffusion models
require calibration
cap, but no T
calibration tube.