Bump (Functional) Testing
A bump test can be performed on an individual sensor (Single Sensor Bump) or a group of
sensors (Multi Sensor Bump) combined into Multi Cal. Select. The same gas is used for a bump
test as for calibration. Typically, two cylinders of calibration gas are needed to perform a bump
test or calibration on an instrument with a PID sensor and electrochemical and LEL sensors.
This may require one gas cylinder with Isobutylene or another VOC test gas to test the PID
sensor, and another with a 4-gas mix to test electrochemical (such as CO, H
2
S, and O
2
) and
LEL sensors. As with calibration, the instrument intelligently splits the process into two
consecutive steps: first, the wizard prompts for testing electrochemical and LEL sensors, and
then it tests the PID sensor.
For a manual bump test, a constant-flow regulator producing 0.5 to 1 liters per minute should
be used, and the calibration adapter must be installed on the instrument. Testing and
calibration with an AutoRAE 2 must be performed using demand-flow regulators. A calibration
adapter must not be used. Teflon tubing must be used to test or calibrate the PID sensor.
Follow the steps described here to perform a manual bump test:
1. Turn on your MultiRAE by pressing and holding [MODE] (the middle button) 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. Enter the Bump Test menu. It is accessible either through Programming
Menu/Calibration or using the following easy shortcut:
With the instrument running in Normal Mode and the main measurement screen shown,
press both [Y/+] and [N/-] at the same time and hold them for 5 seconds. If all the
sensors have warmed up, the Multi-Bump Test menu then appears:
Honeywell MultiRAE Series™ 123 User Manual
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