ACR&Artex Megaphone - Manual (Page 7)

7 Y1-03-0014 Rev. AC
Inspect unit for any evidence of damaged parts, loose mountings or broken leads,
and dirty electrical contacts.
5.2 Assembly
1. Attach Horn (17) and Speaker Assembly () to Megaphone Subassembly (9). Ensure
alignment with location pins. Pass speaker wires through the provided slot.
. Plug speaker connector into the “out” header on PCB.
3. Push entire assembly gently into the housing (14), until it stops. Turn clockwise 45°
and push all the way in. Turn counterclockwise 45° and align holes.
4. Secure with screws (10). Torque to 3 in/lb.
5. Replace volume control knob (4) on volume control shaft.
. Plug the alarm plug (5) attached to lanyard into jack in the side of the case near
volume control. (ACR/EM-1A only)
7. Replace the six batteries (3) in three tubes at microphone end of megaphone case.
CAUTION: Observe polarity of batteries during installation procedure (see
instructions on battery tubes).
8. Replace microphone and mouthpiece assembly (1). Align keyway, and secure with the
three setscrews ().
9. Assembly is complete. Test unit in accordance with Section 4.1.
SECTION 6 – TECHNICAL DATA
Dimensions 5.5” max diameter bell, 11.5” max long
Weight .3 lbs., including batteries
Materials Horn, handle – Anodized Aluminum
Housing – Aluminum
Attachment – Neck strap at top of unit
Gain Control Thumb operated
Amplifier Integrated circuit,  watts power output
Speaker Re-entrant horn and driver type
input power five (5) watts
90° dispersion angle
Microphone High Sensitivity
Batteries Six () standard 1½ volt “AA” cells
Power Drain 1 milliamps static current
550 milliamps maximum current
Frequency Response 500 to 3500 Hz
Anti-Removal Alarm (ACR/EM-1A
only)
Warbling tone 500 – 100 Hz
Alarm Actuator (EM-1A only) Plug pin, retained by nylon cord
Battery Test Circuits Visual Flashing Green LED
Acoustical Beep (ACR/EM-1D only)