Assembly; Section 6 - Technical Data - ACR Electronics ACR-EM-1A - REV Y Product Support Manual

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.
2. 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).
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
Weight
Materials
Gain Control
Amplifier
Speaker
Microphone
Batteries
Power Drain
Frequency Response
Anti-Removal Alarm (ACR/EM-1A
only)
Alarm Actuator (EM-1A only)
Battery Test Circuits
5.5" max diameter bell, 11.5" max long
.3 lbs., including batteries
Horn, handle – Anodized Aluminum
Housing – Aluminum
Attachment – Neck strap at top of unit
Thumb operated
Integrated circuit,  watts power output
Re-entrant horn and driver type
input power five (5) watts
90° dispersion angle
High Sensitivity
Six (6) standard 1½ volt "AA" cells
1 milliamps static current
550 milliamps maximum current
500 to 3500 Hz
Warbling tone 500 – 100 Hz
Plug pin, retained by nylon cord
Visual Flashing Green LED
Acoustical Beep (ACR/EM-1D only)
7
Y1-03-0014 Rev. Y