889-2106-03
Model U-1400 Operations Manual Rev Apr 2020 Page
18
of 39
If all four check loops are not connected or one (or more) is (are) damaged in some way, the
detector will initiate its check loop verification process. The LCD screen will display an
indication of a pending state during the check loop verification. This screen will flash for 55
seconds until one of three things happen; the check loop verification fails, the check loop(s)
causing the check loop verification is (are) connected or restored to a functional state, or the
check loop(s) causing the check loop verification is (are) turned off, i.e. the Loop Check
Timer of the loop(s) is set to 000.
If the check loop verification process continues for the entire 55 second
period and no action has been taken to connect or restore the check loops
causing the check loop verification, the LCD screen will toggle between
the two screens shown with a 50% duty cycle.
If the detector passes its check loop verification process or a pending loop check failure state
is resolved in one of the ways mentioned above, the LCD screen will show a normal (idle)
condition.
5.2
PROGRAM MODE DISPLAY SCREENS
P
ARAMETER
...................Password Protection Screen.
S
ETTING
.........................911 disables the Password Protection.
S
ETTING
D
ISPLAYED
......PSd.
7-
SEGMENT
D
ISPLAY
......Press the
(UP) or
(DOWN) pushbutton to display 000 to
access password entry mode.
D
EFAULT
S
ETTINGS
........Password Protection feature is active.
E
XAMPLE
........................Password entry mode is available for access.
N
OTES
.............................Pressing the
CHAN
button for two seconds at any time will exit
password entry mode.
P
ARAMETER
...................Frequency.
S
ETTINGS
........................Eight selections - 1 to 8.
S
ETTING
D
ISPLAYED
......Bargraph indicates settings from 1 (left) to 8 (right).
7-
SEGMENT
D
ISPLAY
......Actual frequency of the loop circuit. Typically 20.0 to 99.9
kiloHertz.
D
EFAULT
S
ETTINGS
........Loop Input 1 = 2, Loop Input 2 = 4, Loop Input 3 = 6, and Loop
Input 4 = 8.
E
XAMPLE
........................Frequency setting 4 is selected for loop input. The loop
frequency is 34.9 kHz.
N
OTES
.............................Changing the frequency will reset the Loop Input.
An unstable
frequency display varying more than ±0.2 kiloHertz may
indicate loop crosstalk or other interference.
1
©
1
LOOP FAIL
1
©
LOOP FAIL
1
©
FREQ KHZ
1
©
©