Version 1.10
©Copyright 2013, Ambient LLC. All Rights Reserved.
Page 10
4.2.3
Setting Calibrated Temperature
Temperature is measured by a resistive thermal device (RTD) and is subject to electronic variation.
Temperature errors can also occur when a sensor is placed too close to a heat source (such as a
building structure, the ground or trees).
To calibrate the indoor or outdoor temperature, we recommend a mercury or red spirit (fluid)
thermometer. Bi-metal (dial) and other digital thermometers are not a good source and have their own
margin of error. Using a local weather station in your area is also a poor source due to changes in
location, timing (airport weather stations are only updated once per hour) and possible calibration
errors (many official weather stations are not properly installed and calibrated).
Place the sensor in a shaded, controlled environment next to the fluid thermometer, and allow the
sensor to stabilize for 24 hours. Compare this temperature to the fluid thermometer and adjust the
console to match the fluid thermometer.
To calibrate indoor or outdoor temperature, in the Set Mode with indoor or outdoor temperature
flashing, press the
+
key or
MIN/MAX
key to increase or decrease the temperature setting (in
increments of 0.1 degC or 0.18 degF) to match the calibrated or known temperature source.
Note:
The remote (outdoor) thermo-hygrometer will always display the measured temperature
level and not the calibrated temperature level. Only the console will show the calibrated value.
Note:
The dew point calculation is based on the calibrated temperature level.
4.3
Alarm Mode
4.3.1 Alarm Display
While in Normal Mode, press the
ALARM
key to enter the High Alarm Mode. Press the
ALARM
key again to enter the Low Alarm Mode. Press the
ALARM
key again to return to normal mode (or
wait 30 seconds for the programming mode to timeout).
Note:
After entering the
ALARM
mode,
the console will display the high and low alarm
settings. If the value reads
--.--
(dashes), the alarm is not active.
4.3.2
Alarm Programming
While in Alarm Mode, press the
SET
key to set the alarms. The following are high and low alarms:
High Alarm Limits:
Time alarm (hour/minute)
Indoor humidity high alarm
Indoor temperature high alarm
Outdoor humidity high alarm
Outdoor temperature / dew point high alarm
Pressure high alarm
Low Alarm Limits:
In the Low Alarm Mode press the SET key to select the following alarm modes:
Time alarm (hour/minute)
