SINGLE CH ANNE L LOOP DETE CTOR
OPERATING INSTRUCTIONS
I
General
The Model H2 is a single channel detector with a solid state Detect Output and a
solid state Fail Output.
Please verify source voltage before applying power.
The Model H2 will operate on voltages between 8 and 30 VDC with a maximum
current requirement of 45 mA.
II
Indicators and Controls
i
Power / Detect / Fail LEDs
The detector has one green and two red LED indicators used to provide
indications of the detector’s power status, output state, and/or loop failure
conditions. The table below lists the various indications and their meanings.
Status POWER LED (Green) DETECT LED (Red)
FAIL LED (Red)
Off
No power
Detect Output Off
Loop OK
On
Power to detector
Detect Output On
N/A
Flash
N/A
2 Hz (50% duty cycle)
Delay timing
4 Hz (50% duty cycle)
Extension timing
1 Hz (50% duty cycle)
Loop Failure
One flash every five seconds
Prior Loop Failure
ii
Rotary Switch (Sensitivity)
The eight-position rotary switch selects one of eight (8) sensitivity levels as
shown in the table below. 0 is lowest and 7 is highest, with normal (factory
default) being 4. Use the lowest sensitivity setting that consistently detects the
smallest vehicles. Using higher than necessary sensitivity levels may result in
false detections.
Position
0
1
2
3
4 *
5
6
7
-
∆
L/L
2.56% 1.28% 0.64% 0.32% 0.16% * 0.08% 0.04% 0.02%
* Factory default setting.
MODEL H2
