User manual

ManualsBrandsWohler ManualsCarbon Monoxide AlarmALARM-24 Series

Title and Contents ...........................................................

Introduction ............................................................................................

Section 1: General Features and Specifications........

Description and Features .......................................................................

Applications, Specifications, Standard Models, and Other Options ......

Rear Panel Configurations .....................................................................

Section 2: Operation .......................................................

Installation .............................................................................................

Alarm Sounder Enable/Disable Instructions ..........................................

Front Panel Features ..............................................................................

Rear Panel Features ...............................................................................

Section 3: Technical Information .................................

LED Bargraph Display Specifications ..................................................

ALM26 Internal Settings - Address, Peak Hold, PPM Characteristics...

Level Meter Alternative Scales .............................................................

ALM26 (Analog) Interconnect Block Diagram .........................................

ALM26 (Digital) Interconnect Block Diagram ..........................................

ALM26 Series

1U Audio Level Meter Alarm Monitor

Analog or Digital Inputs, Up To Twenty-Four

Channels, Loss-of-Audio/Clipping/Phase

Monitoring, with Audible and Visual Alarm

and 26-Segment Hi-Resolution Level Meters

Document P/N 821644 Rev-A

CONTENTS

User Manual

Summary of content (24 pages)

PAGE 1
ALM26 Series 1U Audio Level Meter Alarm Monitor Analog or Digital Inputs, Up To Twenty-Four Channels, Loss-of-Audio/Clipping/Phase Monitoring, with Audible and Visual Alarm and 26-Segment Hi-Resolution Level Meters Document P/N 821644 Rev-A User Manual CONTENTS Title and Contents ........................................................... 1 Introduction ............................................................................................ 2 Section 1: General Features and Specifications........
PAGE 2
Important Safety Instructions 1) Read these instructions. 2) Keep these instructions. 3) Heed all warnings. 4) Follow all instructions. 5) Do not use this apparatus near water. 6) Clean only with dry cloth. 7) Do not block any ventilation openings. Install in accordance with the manufacturer's instructions. 8) Do not install near any heat source such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
PAGE 3
ALM26 Series User Manual P/N 821644 Rev-A Section 1 General Features and Specifications Description Features Applications Specifications Standard Models Other Options © 2006 Wohler Technologies Inc.
PAGE 4
ALM26 Series User Manual P/N 821644 Rev-A Section 1: General Features and Specifications ALM26 Series 1U Audio Level Meter Alarm Monitor RESET 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 POWER RESET WOHLER TECHNOLOGIES ALM26-24D ALL ALM26-24Dxx Front Panel Description The Wohler ALM26 Series systems provide audio level metering and audible and visual alarms for loss of audio, over-range (clipping), and phase/polarity reversal.
PAGE 5
ALM26 Series User Manual P/N 821644 Rev-A Section 1: General Features and Specifications Applications The ALM26 Series audio alarm monitor units are an adaptable and effective way to monitor any Analog or AES/EBU digital audio application. The following are some of the applications where an ALM26 Series unit would prove valuable.
PAGE 6
ALM26 Series User Manual P/N 821644 Rev-A Section 1: General Features and Specifications Rear Panel Configurations The 1U ALM26 rear panels are comprised of modular panel sections. In any given ALM26 model, from one to three of the modular panel sections contain the audio input connectors (unused sections have blank panels), with a fourth remaining section containing the alarm controller features.
PAGE 7
ALM26 Series User Manual P/N 821644 Rev-A Section 2 Operation Installation Alarm Sounder Enable/Disable Instructions Front Panel Features Rear Panel Features © 2006 Wohler Technologies Inc.
PAGE 9
ALM26 Series User Manual P/N 821644 Rev-A Section 2: Operation Installation Mounting The unit should be mounted where convenient for operating persons, ideally at approximately eye level for best visual monitoring. Heat Dissipation No special considerations for cooling are necessary as long as the ambient temperature inside the rack area does not exceed approximately 40°C (104°F).
PAGE 10
ALM26 Series User Manual P/N 821644 Rev-A Section 2: Operation Front Panel Features Please refer to the example in Figure-2a on the following page to familiarize yourself with the front panel features of the ALM26 Series units covered by this manual. The following sections describe these functions and are referenced, by number, to Figure-2a. 1 Alarm Sounder This piezo Alarm Sounder speaker produces an audible alarm when any channel detects any alarm condition.
PAGE 11
ALM26 Series User Manual P/N 821644 Rev-A Section 2: Operation WOHLER TECHNOLOGIES 1 2 4 RESET 1 2 3 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 5 POWER RESET ALL ALM26-24D 6 Figure-2a: Front Panel Features © 2006 Wohler Technologies Inc.
PAGE 12
ALM26 Series User Manual P/N 821644 Rev-A Section 2: Operation Rear Panel Features Please refer to Figure-2b on the following page to familiarize yourself with the rear panel features of the ALM26 Series units covered by this manual. The following sections describe these features and are referenced, by letter, to Figure-2b. A Digital (AES) Audio Inputs (ALM26-nnD Only) Each input connector receives an AES digital signal from which two channels are derived.
PAGE 13
TERM TERM AES (110 ) TERM TERM 17-18 17 18 21 22 11 12 15 16 11-12 TERM TERM AES (110 ) TERM TERM TERM TERM 9-10 9 10 13 14 3 4 7 8 3-4 TERM TERM AES (110 ) TERM TERM TERM TERM TERM TERM 1-2 1 2 5 6 5-6 1-2 75 AES AES AES AES 5-6 CH B CH B AES CH A 75 AES CH B CH A 75 7-8 CH A CH B 75 3-4 7-8 CH A 75 9-10 13-14 OPT OPT OPT PORT 1 PORT 1 PORT 1 RS232 RS232 RS232 INTERNAL POWER UNDERWRITERS LABS SEE POWER SUPPLY LABEL ON SIDE INTERNAL POWE
PAGE 14
ALM26 Series User Manual P/N 821644 Rev-A Section 2: Operation Rear Panel Features (Continued) C Analog Audio Inputs (ALM26-nnA Only) The Analog units have balanced (>10K Ω impedance) inputs terminated in 6-pin "mini" Phoenix connectors. There are two separate analog signals; one signal to the left three pins (CH A) and the second signal to the right three pins (CH B). There are two input connectors per input section (4 channels).
PAGE 15
TERM TERM AES (110 ) TERM TERM TERM TERM 17-18 21 22 17 18 15 16 11 12 11-12 TERM TERM AES (110 ) TERM TERM TERM TERM 9-10 13 14 9 10 7 8 3 4 3-4 TERM TERM AES (110 ) TERM TERM TERM TERM 1-2 1 2 5 6 75 1-2 5-6 OPT OPT OPT PORT 1 PORT 1 PORT 1 RS232 RS232 RS232 INTERNAL POWER UNDERWRITERS LABS SEE POWER SUPPLY LABEL ON SIDE INTERNAL POWER UNDERWRITERS LABS SEE POWER SUPPLY LABEL ON SIDE INTERNAL POWER UNDERWRITERS LABS SEE POWER SUPPLY LABEL ON SIDE 15 © 20
PAGE 16
ALM26 Series User Manual P/N 821644 Rev-A Section 2: Operation Rear Panel Features (Continued) E Option Select Switch This 10-position BCD (Binary Coded Decimal) rotary switch is used to set operation of the unit. It can be accessed using a small flathead screwdriver or similar tool. See table below for settings. Please note that choosing alternate scales may require a change to the scale indication silk-screening next to the bargraph display level meters on the front panel.
PAGE 17
TERM TERM AES (110 ) TERM TERM TERM TERM 17-18 21 22 17 18 15 16 11 12 11-12 TERM TERM AES (110 ) TERM TERM TERM TERM 9-10 13 14 9 10 7 8 3 4 3-4 TERM TERM AES (110 ) TERM TERM TERM TERM 1-2 1 2 5 6 75 1-2 5-6 OPT OPT OPT PORT 1 PORT 1 PORT 1 RS232 RS232 RS232 INTERNAL POWER UNDERWRITERS LABS SEE POWER SUPPLY LABEL ON SIDE INTERNAL POWER UNDERWRITERS LABS SEE POWER SUPPLY LABEL ON SIDE INTERNAL POWER UNDERWRITERS LABS SEE POWER SUPPLY LABEL ON SIDE 17 © 20
PAGE 18
ALM26 Series User Manual P/N 821644 Rev-A (This page intentionally left blank) 18 © 2006 Wohler Technologies Inc.
PAGE 19
ALM26 Series User Manual P/N 821644 Rev-A Section 3 Technical Information LED Bargraph Display Specifications ALM26 Internal Settings - Address, Peak Hold, PPM Characteristics Level Meter Alternative Scales ALM26 (Analog) Interconnect Block Diagram ALM26 (Digital) Interconnect Block Diagram © 2006 Wohler Technologies Inc.
PAGE 20
ALM26 Series User Manual P/N 821644 Rev-A Section 3: Technical Information LED Bargraph Display Specifications Level meter type: LED bargraph Segment quantity: 26 Level gain (DIP switch selectable): 0, +4, +6, +8 dB Bargraph Length: 1.078" (27.85 mm) LED segment size: 0.14" x 0.028" (3.57 x 0.7 mm) LED segment pitch: 0.041" (1.05 mm) Segment display color: Tri-color (red, amber, green) Peak emmision wavelength: Green: 570 nm, Red: 630 nm Segment brighness, (If = 20 mA): 3.
PAGE 21
ALM26 Series User Manual P/N 821644 Rev-A Level Meter Alternative Scales The standard scales used on the ALM26 Series level meters are the Extended VU scale for analog models and AES scale for digital models (see diagram below). However, if alternative scale characteristics are selected for the level meters using the Option Select Switch (Item F, page 16), it is recommended that a label with the appropriate scale be applied to the front panel LED bargraph level meters.
PAGE 22
ALM26 (Analog) Interconnect Block Diagram ALM26 Series User Manual P/N 821644 Rev-A 22 © 2006 Wohler Technologies Inc.
PAGE 23
Section 3: Technical Information ALM26 (Digital) Interconnect Block Diagram ALM26 Series User Manual P/N 821644 Rev-A © 2006 Wohler Technologies Inc.
PAGE 24
ALM26 Series User Manual P/N 821644 Rev-A Wohler Technologies, Inc. Wohler 31055Technologies, Huntwood Avenue Inc. 31055 Huntwood Avenue Hayward, CA 94544 Hayward, CA(510) 94544 1-888-596-4537 Fax: 870-0811 web: www.wohler.com Phone: (510) 870-0810 Fax: (510) 870-0811 e-mail: support@wohler.com US Toll-Free: 1-888-596-4537 www.wohler.com support@wohler.com 24 © 2006 Wohler Technologies Inc.