ORACLE SERIES 2E, 2EC, 4E, 4EC, 4H
Operations Manual
Eberle Design Inc.
Page 22
Section 6
Specifications
6.1 MECHANICAL
Height ......................................................................................................... 4.50 inches
Width (2E, 2EC, 4H) ................................................................................... 1.14 inches
Width (4E, 4EC) ........................................................................................... 2.3 inches
Depth (excluding handle) ...........................................................................6.875 inches
6.2 ENVIRONMENTAL
Storage Temperature Range ................................................................... -45 to +85
o
C
Operating Temperature Range ................................................................ -34 to +74
o
C
LCD Operating Temperature Range ........................................................ -20 to +74
o
C
Humidity Range (non-condensing) ..................................................... 0 to 95% Relative
6.3 ELECTRICAL
DC Supply Voltage Minimum ...........................................................................10.8 Vdc
DC Supply Voltage Maximum ..........................................................................28.8 Vdc
DC Supply Current Maximum at 12Vdc (ORACLE 2E, 2EC) ............................. 100 mA
DC Supply Current Maximum at 12Vdc (ORACLE 4E, 4EC, 4H) ...................... 175 mA
DC Supply Current for LCD Heater Maximum at 12Vdc (
ORACLE 2E, 2EC, 4H
) .. 250 mA
DC Supply Current for LCD Heater Maximum at 12Vdc (ORACLE 4E, 4EC) .... 500 mA
DC Inputs
True (low) ..................................................................................... less than 8 Vdc
False (high) ............................................................................ greater than 16 Vdc
Optically Isolated Outputs
True (low, 50 mA) .......................................................................less than 1.5 Vdc
Maximum Leakage Current (Vout = 24Vdc) ................................ less than 120 uA
Maximum Current ..................................................................................... 100 mA
Relay Outputs
AC Contact Rating .......................................................................... 5A @ 120 Vac
DC Contact Rating ............................................................................ 5A @ 30 Vdc
6.4 TUNING
6.4.1 LOOP INDUCTANCE (TUNING) RANGE
The detector will automatically tune to a loop and lead-in combination within the tuning
range of 20 to 2500 microHenry with a Q factor greater than 5.
6.4.2 ENVIRONMENTAL TRACKING
The detector automatically and continuously compensates for component drift and
environmental effects throughout the tuning range and across the entire temperature range.
6.4.3 GROUNDED LOOP OPERATION
Each detector channel will operate when connected to poor quality loops including those
that have a short to ground at a single point.
6.4.4 LEAD-IN LENGTH
The unit will operate with lead-in (feeder) lengths up to 5,000 feet (1,524 m.) with
appropriate loops and proper lead-in cable.
6.4.5 LOOP INPUT (LIGHTNING PROTECTION)
The loop input incorporates lightning and transient protection devices and the loop
oscillator circuitry is transformer-isolated for each channel. The lightning protection will