User Manual

1 5 65-2649RK-HC-04 M2A Transmitter Operator’s Manual

Sta rt Up

Introducing Incoming Power

1. Complete the installation procedures described earlier in this manual.

2. Verify that all wiring connections are correct and secure.

3. Tu rn on t he incoming power.

4. If necessary, tur n on th e cont roller or ot her mo nitoring device that is connected to the

M2A.

5. The OLED di splay will indicate the firmware version when the M 2A is first powered

up and will then count down a one minute warm-up period before normal operation

begins. During n ormal operation, the di splay will indica te the target gas and current

gas reading. Verify that the display is indicating the target gas and current gas reading

after the warm-up period is complete and normal operation begins.

NOTE: Allow the M2A’s detect or to wa rm up fo r 15 minutes before you continue with

the next section, “Adju sting the Fresh Air Reading.”

Adjusting the Fresh Air Reading

When the M2A is shipped from RKI Instruments, Inc., it is factory calib rated. If a f ull

calibration is desired at startup, see “Calibration” on page 32.

Verify that the M2A is in a fresh air environment (environment known to be free of

combustible or toxic gas vapors and of normal oxygen content, 20.9%).

CAUTION: If you suspect the presen ce of combustib l e gas in the monitoring environment, use

the calibration kit and the zero air calibration cylinder to introduce “fresh air” to

the detector and verify an accurate fresh air setting. See “Calibration” on page 32

for instructions o n how to use a z ero air cylinder when performing a fresh air

adjustment.

Non-Intrusive Fresh Air Signal Adjustment

If the M2A is insta lled in a class if ied area and non-intrusi v e zero adjustment is required,

follow the instructions below, but do not remove the junction box cover. Use the

magnetic wand accessory to actuate the magnetic switches instead of pushing the control

switch buttons. To actuate a magnetic switch and perform the sam e operation as pressing

a control switch button, touch the magnet in the end of the ma gnetic wand to the M2A’s

glass cover directly over the magnetic sw itch you wish to a ctuate. Touching the glass and

removing the wand is the same as pressing and releasing a button. Touching the glass and

keeping the wand in plac e is the same as pressing and holding a button.

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