GRAPHTEC gl820 User Manual page 69

Dead zones of trigger and alarm levels
Trigger and alarm levels are provided with a dead zone in order to prevent false detection due to
noise.
Since a dead zone exists as shown in the figure below, the conditions are met at different points
between rising and falling signals.
Therefore, errors in relation to the setting levels are generated as shown in the figure below.
<For Temperatures>
Trigger/alarm setting level
An alarm that has occurred is canceled at the following levels:
• For rising setting: Setting value -0.4°C
• For falling setting: Setting value +0.4°C
<For Voltages>
Trigger/alarm setting level
Conditions met here in rising
(4) USER settings
By switching between users using the USER Setting, you can easily read out different setting conditions
that have been stored
Selection item
User
Department name
Setting conditions switch Guest, User 1, User 2)
Macro file Folder
name
File
Name
Macro run
Dead zone
Conditions met here in rising Conditions met here in falling
Dead zone
Conditions met here in falling
Selections available
Text input (when User is selected)
Text input (when User is selected)
MEM, USB1
Specify a file name.
Press right key to execute.
CHAPTER 3 Settings and Measurement
Setting value +0.3°C
Setting value -0.3°C
Setting value + 0.5% of range
(For 1 V range, 1 V*0.5%=0.005 V)
Setting value - 0.5% of range
(For 1 V range, 1 V*0.5%=0.005 V)
3−33