Macurco RD-xx User Manual
REV – 2.1
[34-2900-0511-7 ]
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Note: Gas testing results can vary depending upon temperature, humidity, test duration and other variables. For optimum
results, it is suggested that the unit be in continuous operation for a minimum of 7 days, in a stable environment and at
standard conditions before proceeding with testing.
WARNING
The following steps must be performed when conducting a calibration verification test (bump
test) to ensure proper performance of the monitor. Failure to do so may adversely affect product
performance and result in sickness or death.
•
When performing a calibration verification test (bump test) only use certified calibration
gas at the required concentration level. Do not test with expired calibration gas.
•
If the instrument cannot be tested, do not use until the reason can be determined and
corrected.
•
Do not cover or obstruct display or visual alarm cover.
•
Ensure sensor inlets are unobstructed and free of debris”
7.4
Gas Testing
It is recommended to perform gas test for RD-xx units at least once every 3 months.
7.4.1
Assembling the Regulator, Hose, and Test hood
1.
Open the FCK. Connect the 1200ppm gas cylinder to the regulator.
2.
Connect one end of the Nafion tubing to one end of the Tygon tubing, connect the other end of the Tygon tubing to
test hood.
3.
Connect the other end of Nafion tubing to another piece of Tygon tubing. Connect the other end of the Tygon tubing to
the regulator
7.4.2
Testing the Fan Relay
1.
Remove the Philips screw on the front of the RD-xx. Remove the front cover.
2.
Check the pressure gauge on the regulator. If you have 25-psi or less, you will need to replace the gas canister.
3.
Place the Test Hood over the gas sensor.
Note
: The time to activate the Fan relay depends on the delay setting.
