Avtech RMA-DET-SEN Quick start guide
Installation Note
AVTECH Software, Inc. Temperature & Environment Monitoring... Made Easy! AVTECH.com
Digital Extreme Temperature Sensor
AVTECH
AVTECH’s Digital Extreme Temperature Sensor
monitors a wide range of low and high temperatures with a
thermocouple and sensor box that communicates readings to
your Room Alert via a digital sensor port. This “Plug and Play”
sensor provides reliable extreme low or high temperature
values to your Room Alert.
Digital Extreme Temperature Sensor Package Contents
• One (1) sensor box
•
stainless steel probe
• One (1) 25' RJ-11 cable
Digital Extreme Temperature Sensor
Digital Extreme Temperature Sensor Features
Sensor Box vs Thermocouple Probe Temperature
Your Digital Extreme Temperature Sensor detects 2 temperatures: that of the on-board
sensor inside the sensor box (room temperature) and that of the thermocouple probe
(extreme temperature). The table below shows the supported ranges:
Component Temperature Range
Sensor Box Temperature -40º F to 257º F (-40º C to 125º C)
Thermocouple Probe -328º F to 932º F (-200º C to 500º C)
The operating temperature for the thermocouple’s cable is
32º F to 212º F (0º C to 100º C), which is a narrower range than
that of the probe.
Status LED
The sensor box includes an LED that indicates the following:
This LED Color... Means...
Solid green The Digital Extreme Temperature Sensor box is powered on
Unlit The Digital Extreme Temperature Sensor box is NOT powered on
Sensor
Box
Probe
Thermocouple
Status
LED
Front
Thermocouple
Port
Ground
Screw
RJ-11
Port
Left
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Digital Extreme Temperature Sensor (RMA-DET-SEN)
Install Your Digital Extreme Temperature Sensor
Step 1: Mount your Digital Extreme Temperature Sensor.
Your Digital Extreme Temperature Sensor comes with a 40" thermocouple cable connected
to the port on the front of the sensor box. When you are considering the layout of
your components, remember that the thermocouple cable and the sensor box are not
designed to withstand the same temperatures as the thermocouple probe. (See page 4 for
operating ranges.)
1. Locate the thermocouple probe where you wish to measure temperature. The location
must be within the temperature range supported by probe.
2. Run the thermocouple cable in an area within the cable’s operating temperature range.
The cable cannot withstand the same extreme temperatures as the probe.
3. Place the sensor box in an area within the box’s operating range. The box cannot
withstand the same extreme temperatures as the probe. You may mount the sensor
Step 2: Connect the sensor box to Room Alert.
1. Connect one end of the RJ-11 cable to the RJ-11 port on the sensor box.
2. Connect the other end of the RJ-11 cable to a digital port on
your Room Alert. Try to avoid running the cable near large
EMI that can interfere with the sensor’s readings.
Supported Thermocouples
Your Digital Extreme Temperature sensor comes with a K-type stainless steel
thermocouple that is grounded to avoid electrical faults.
If desired, you may instead use a third-party K-type
thermocouple (grounded or ungrounded). Your
thermocouple must fall within the thermocouple input
range supported by the Digital Extreme Temperature
Sensor, which is:
• -454º F to 2501º F (-270º C to 1372º C)
Simply connect your third-party thermocouple to the
thermocouple port on the sensor box, as shown here.
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Digital Extreme Temperature Sensor (RMA-DET-SEN)
Fault Detected Messages
If your Digital Extreme Temperature Sensor
detects a fault from the thermocouple, you’ll see
“Fault Detected” in place of the Thermocouple
Temperaturereading on your Room Alert Status page.
Below the “Fault Detected” message, you’ll see one
of these three fault codes:
• Open Circuit
• Short to GND
• Short to VDD
Open Circuit
An “Open Circuit” fault typically means that your thermocouple is not properly connected
to the Digital Extreme Temperature Sensor box. Check that the thermocouple is securely
inserted into the port on your sensor box.
Short to GND / Short to VDD
Both “Short to GND” and “Short to VDD” faults typically occur if you’re using a third-party
ungrounded thermocouple that comes into contact with metal.
To avoid these sensor faults, you may ground an ungrounded third-party thermocouple by
following these steps:
If you’re using a grounded thermocouple, like the one that comes standard with your
Digital Extreme Temperature Sensor, you do not need to follow these steps.
1. Connect a ground wire to the ground screw on the front of the sensor box. Tighten the
screw around the ground wire to secure it in place, as shown below.
2. Run the ground wire to the chassis of the equipment you’re monitoring and secure it
wherever available.
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Digital Extreme Temperature Sensor (RMA-DET-SEN)
Sensor Features & Specications
Environment Condition Monitored Indoor ambient temperature
& extreme low or high ambient temperatures
Type Of Sensor Digital
Power Supply Powered by Room Alert
Sensor Box
Operating Range -4° F to 185° F (-20° C to 85° C)
Sensor Box Temperature Sensor
Operating Range -40º F to 257º F (-40º C to 125º C)
Resolution 0.06º C
Accuracy +/- 2º C
Thermocouple
Type K-type, grounded
Included Yes
Cable Length 40"
Cable Operating Range 32º F to 212º F (0º C to 100º C)
Probe Length 1.58"
Probe Diameter 0.12"
Probe Operating Range -328º F to 932º F (-200º C to 500º C)
Accuracy +/- 1.1° F or °C
Sensor Box Thermocouple Input
Range -454º F to 2501º F (-270º C to 1372º C)
Resolution 0.25º C
Accuracy
+/- 1° C from -100º C to 100º C
+/- 2° C from -200º C to 700º C
+/- 4° C from 700º C to 1372º C
+/- 6° C from -270º C to 1372º C
Sensor Cable Type
Digital Sensor Cable RJ-11 (standard straight-through telephone cord)
Included Yes
Length 25'
Maximum Extendible Length 100' total
Compatible Products Room Alert 32S, 12S and 3E, manufactured in
2021 or later
AVT-210316-1.0.0
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Congure Your Digital Extreme Temperature Sensor
Congure Your Digital Extreme Temperature Sensor
Use Room Alert’s Built-In Web Interface
compatible with the Digital Extreme Temperature Sensor. You may download the latest
RoomAlert.com.
• Room Alert 32S v1.3.0 (with sensor controller minimum version v6)
• Room Alert 12S v1.3.0
• Room Alert 3E v2.3.0 (with sensor controller minimum version v3)
Firmware for other models coming soon
Settings
Sensors in the web interface of your Room Alert. The options you see below will vary
depending on the model.
1. Scroll to your external digital sensor(s), the total number of which will vary depending
on the Room Alert model.
2. Find the digital sensor interface that matches the port you connected your Digital
your Room Alert, look for Sensor 1 Alarm Conguration; if you used the second, look
for Sensor 2 Alarm Conguration, and so on. Notice that your Room Alert monitor
automatically detects the type of digital sensor and displays it in Sensor Type.
3. In Sensor X Label, you may leave the default, “Ext Sensor X,” or enter something more
descriptive. Room Alert “E” models accept up to 15 characters, including only letters,
numbers, spaces, hyphens (-), underscores (_) or periods (.). Room Alert “S” models
accept up to 30 characters, including the above and special characters, like ampersand
(&).
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Congure Your Digital Extreme Temperature Sensor
4. Alarm On automatically populates with the default temperature scale. Please refer to
your Room Alert User’s Guide & Reference Manual to change it.
5. In High and Low, you may enter values for high and low thresholds for the sensor’s
thermocouple reading. Your Room Alert generates alerts based on those thresholds.
• Room Alert “E” models: the default High & Low is 0—which means no alarm is
•
6. In Adjust, you may leave the default, 0, or enter a value to adjust the temperature
must enable the Adjust
7. In Use Alarm Prole, which controls light towers and relays on your Room Alert, you
may leave the default, Prole 1
8. Select Save Settings at the top or bottom of the page. Your Room Alert will
automatically reboot and commit your changes.
AVT-210316-1.0.0
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