29
9
9
.
.
T
T
R
R
A
A
N
N
S
S
M
M
I
I
T
T
T
T
E
E
R
R
O
O
P
P
E
E
R
R
A
A
T
T
I
I
O
O
N
N
1. Batteries _ Make sure the two “AA” alkaline batteries are installed correctly. Use 2000mA rated
alkaline-type batteries for optimum operating time between replacements. If rechargeable-type
batteries are used, for optimum operating time, choose ones rated above 1600mA.
2. Startup Procedure _ There are two types of transmitter power key-switch available for the
Alpha 500 series, the standard fixed type (refer to fig. 23) and the optional removable type (refer
to fig. 24). Basically both key types operate in the same fashion depending on personal
preference and safety regulations. For the below illustrations the optional removable-type power
key is used.
Elevate the red EMS button by twisting it 1/4 turn clockwise; it will pop up. Then insert the
transmitter power key onto the key-switch slot located on the top left-hand corner of transmitter
handset (refer to fig. 25). Make sure the black arrow marking on the power key is pointed
directly towards the “OFF” marking on the transmitter handset. To turn on the transmitter power,
just rotate the power key clockwise to “ON” position. The Status LED located at the center of the
power switch will display a green blinking light for up to 40 seconds when the power key is
turned to “ON” position. At this time the receiver MAIN relay is also activated. After 40 seconds
of inactivity, that is 40 seconds after the last pushbutton is released, the green light will disappear
thus temporarily deactivating the transmitter power and the receiver MAIN. Pressing any
pushbutton thereafter will close the receiver MAIN and start the timing sequence over again.
This important safety feature is designed to ensure that the transmitter handset and the receiver
MAIN will be in "power off" position if the operator forgets to turn off the transmitter power, or if
the transmitter unit is left unattended in the work area.
(Fig. 23) Fixed On/Off key (Fig. 24) Removable On/Off key
(Fig. 25) Removable power key installation procedure
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