ATI Technologies UniSens A12 Series, Руководство пользователя

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Series A12 Unisens 2-Wire Transmitter
O & M Manual - 19 -
Rev-L, 7/15
TRANSMITTER MODE SELECTION
The transmitter provides 4 main mode selections. After the display scrolls through the power-up
sequence and completes the start-up delay, it enters the NORMAL mode of operation, displaying gas
concentration. By holding a magnet over the MODE control, the display will indicate "InFo". Repeating
this process will change the display to "tESt" and then "CAL". The meaning of these modes is as follows:
InFo Designates INFORMATION mode. In this mode, you may review the information initially
displayed during the power-on sequence.
tESt
Designates TEST mode. In this mode, the Auto-Test generator may be manually
activated, and the 4-20 mA output may be tested at 4 set values.
CAL
Designates CALIBRATION mode. In this mode, the zero and span of the sensing
module may be adjusted, the 4 and 20 mA output current can be adjusted, and the Auto-
Test generator can be enabled or disabled.
INFORMATION MODE
To review the transmitter information, activate the MODE control until the display shows "InFo"
and then activate the ENTER control. The display will scroll through the same information shown during
power-up. See page 10 for details on the information displays.
TEST MODE
There are two selections available under the TEST menu. The first selection allows manual
activation of the Auto-Test by the operator. The second selection allows the transmitter output to be set
to 4, 12, and 20 mA in order to check the devices tied to the output. In addition, a failure condition can be
simulated, causing the output to go to about 3.6 mA.
MANUAL AUTO-TEST ACTIVATION
From the NORMAL display, activate the MODE control twice and the display will read "tESt".
Activate the ENTER control. If a sensing module with Auto-Test generator is installed, the display will
change to "SEnS" and the AUTO TEST flag will be displayed near the top of the display. If you activate
the ENTER control at this point, the Auto-TEST sequence will begin and the AUTO TEST flag will begin
to flash. Activating the MODE control will allow you to escape from this routine without activating the test
sequence.