Enviro EA800 - Manual (Page 47)

Installation
D-011-0152 43
Adding Wired Sensors
■ Low temperature sensors - Blue Thermistor Probes: See “Adding a Wired Temperature Sensor” on page 43.
■ High temperature sensors - Red Thermistor Probes: See “Adding a Wired Temperature Sensor” on page 43.
■ Ultra Low temperature sensors - White Thermistor Probes: See “Adding a Wired Temperature Sensor” on
page 43.
■ HA-III+ humidity sensor: See “Adding a Wired HA-III+ Humidity Sensor” on page 44.
■ WaterBug sensor: See “Adding a Wired WaterBug Sensor” on page 45.
■ N.O. Contact: See “Adding a Wired Contact Closure Sensor” on page 46.
■ N.C. Contact: See “Adding a Wired Contact Closure Sensor” on page 46.
■ 4-20 mA: See “Adding a 4-20mA Sensor” on page 47.
Adding a Wired Temperature Sensor
The procedure shown below adds a wired Blue temperature sensor, but is applicable to the wired Red and White
temperature sensors as well.
The Hysteresis setting helps prevent alarms from being set and reset continually if the environment is at or near
the alarm set point by providing an acceptable variance. For example, if HYSTERESIS is set at 1 and the sensor High
Alarm Limit is set at +158, the sensor reading must decrease to +157 (+157 minus 1) in order for the temperature
alarm to reset to a no-alarm condition.
When setting numeric values, use the arrow keys to change the value. Use the PREV and NEXT soft keys to move
the cursor to the next or previous digit. Press the ENTER key to enter the value.
This is the start screen for the next
sensor to be added, if any.
F3
NOTE: Select the sensor number that
matches the input number used by the
sensor, or an alarm may result.
Example values are shown, Set all limit
values as appropriate for your system.