User manual

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ALM26 Series User Manual P/N 821644 Rev-A

Features

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. When a fault condition occurs, it activates individual channel level meter LED behavior and sets off a mutable

acoustic alarm. It also energizes a rear-panel relay contact closure(s) for external alarm indication.

High-resolution 26-segment tri-color LED bargraph display level meters provide a choice of VU and PPM display characteristics. These

level meters are also used to display alarm conditions by flashing groups of red segments.

An alarm is activated by audio levels falling outside a pre-determined range for a pre-determined period of time. Each channel may be set

individually, or grouped in stereo pairs. Clip and loss alarms are independently indicated on each channel. Carrier alarms (digital units

only) and phase alarms are linked in stereo pairs. Individual reset buttons are provided for each channel, as well as a “reset all” button.

A Piezo buzzer sounds when any channel indicates any type of alarm.

The unit may by easily configured using a Windows-based application.

The ALM26 Analog models monitor analog signals and feature "mini" Phoenix stye input connectors as standard. The ALM26 Digital

models monitor AES/EBU digital signals with a choice of Phoenix, BNC, or XLR input connectors. Custom variations are available.

ALM26 SeriesALM26 Series

ALM26 Series

1U Audio Level Meter Alarm Monitor

Description

Section 1: General Features and Specifications

• Centralized monitoring of facility-wide signal conditions

• Only one rack space high

• Up to twenty-four channels can be monitored

• Up to twenty-four high-resolution 26-segment tri-color LED

bargraph display level meters

• Analog or Digital (AES/EBU) models available

• Alarms for Signal Loss, Over-range (clipping), and Phase

(polarity) reversal. Alarm for loss-of-carrier (loss of

digital signal) is available on digital units.

• Adjustable level thresholds for alarm conditions

• Audible piezo alarm (mutable)

• Channel pairs may be configured as either mono or stereo on a per-

pair basis

• Visible alarm indication via LED level meter behavior for each

channel

• Full duplex RS-232 control/status

• Individual channel reset buttons

• Reset All button

• Balanced inputs on "mini" or standard Phoenix, BNC, or XLR

connectors (depending on model)

• Alarm parameters configurable with Windows-based application

• Power indication LED

ALM26-24Dxx Front Panel

ALM26-24D

RESET

ALL

POWER

WOHLER

TECHNOLOGIES

1513

18 2019

22 23 24

RESET

42 3 5 6 7 8 9 10

11 12

NOTE: In the model names throughout this manual, the unspecified channel quantity is indicated by "nn", the unspecified stereo/

mono is indicated by "x", and unspecified connector option is indicated by "/x".