devices:microset:intro
Table of Contents
Alerton Microset II
Installation and Operations Guide
Introduction
The Microset™ II is a wall-mounted sensor for BACtalk® VLCs1). Depending on the VLC version, the Microset II may be interchangeable with previous version BACtalk Microsets. See “Compatiblity with Earlier Version VLCs” for details. The Microset II has a backlit liquid crystal display (LCD) and intuitive button operation. It connects to a VLC using three low-voltage wires. The Microset II exchanges data and receives commands from a VLC using a range of AV and BV data points in the VLC that are reserved for Microset operation. These data points are available from the VLC as BACnet objects.
Features
- Outside temperature displayed at all times
- Space (room) temperature displayed at all times
- Optional outside and room himidity display
- Fan speed display/adjustment (up to three speeds and Off)
- Setpoint display and adjustment
- After-hours and housekeeping overrides
- Heating or cooling mode display
- English or metric units
Specifications
Table 1: BACtalk Microset II specifications
| Thermistor | The thermistor is integrated with the device. The unit is a microprocessor-based sensor with a built-in analog to digital converter for temperature and humidity, which is designed to communicate directly with VLCs |
| Type | Uni-curve Type II |
| Resistance | 10kΩ at 77ºF (22ºC) |
| Interchangeability | 0.36°F (0.2°) |
| Time Constant2) | 10 seconds (to 66% of new temperature) |
| Stability3) | 0.036°F (0.02°C) drift per year |
| Accuracy4) | ±0.36°F (0.2°C) over range of 32–158°F (0–70°C) |
| Power | 24 VAC/VDC @ 25mA for backlit display. Orange lead terminates to 24 VAC or 24 VDC terminal on VLC. Sensor draws 5 VDC @ 10 mA from VLC. |
| VLC connection | 24 VAC/VDC @ 25mA for backlit display. Orange lead terminates to 24 VAC or 24 VDC terminal on VLC. Sensor draws 5 VDC @ 10 mA from VLC. |
| Dimensions | 4.6“ (117 mm) H X 3.0” (76 mm) L X 0.7“ (18 mm) D |
| Humidity sensor | Optional |
| Total accuracy | ±2% RH, 0–100% RH @ 25°C, with saturated salt calibration |
| Operating temp. | -40–185°F (-40–85°C) |
| Repeatability | ±0.5% RH |
| Interchangeability | ±5% RH up to 60%RH, ±8% RH at 90% RH (typical humidity) |
| Ratings | Listed Underwriters Laboratory as an accessory for VAVs and VLCs EMC Directive 89/336/EEC (European CE Mark), pending FCC Part 15, Subpart J, Class A. pending |
devices/microset/intro.txt · Last modified: 2011/03/01 10:10 by davidbac