301UM0031_01
TD136 Enhanced Vehicle Detector User Manual
Page: 6 of 29
2.
TECHNICAL DATA
2.1 Functional Data
Tuning
Fully Automatic
Self-tuning range
20 to 1500 µH
Sensitivity
Four step switch selectable
High 0.02 %
∆
L/L
Medium High 0.05 %
∆
L/L
Medium Low 0.10 %
∆
L/L
Low 0.50 %
∆
L/L
Frequency
Four step switch selectable
Frequency dependent on loop size
Relay Outputs
Presence Relay
Fault Relay
Presence Relay
Fail-safe
Presence Time
Switch selectable:
1 Second
4 Minutes
40 Minutes
No fixed time-out (dependant on inductance change) Approx.
1 hour for 3 %
∆
L/L
Delay Time
Switch selectable:
0 Seconds
10 Seconds
20 Seconds
30 Seconds
Fault Output
Separate fault monitor output relay
Operates under the following conditions:
1. Loop open/short circuit
2. Detector/power fault
Response Times
Turn – on 60 milliseconds
Turn – off 60 milliseconds
Drift Compensation Rate
Approx. 1 %
∆
L/L per minute
Visual Indications
1 X Power LED - Red
1 x Channel Status LED - Green
Reset
Reset by push button on front of enclosure
Surge protection
Loop isolation transformer, gas discharge tubes, and Zener
Diode clamping on loop input