GRAPHTEC GL820 - Page 69

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CHAPTER 3 Settings and Measurement
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gure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>
Dead zone
Setting value +0.3°C
Setting value -0.3°C
Conditions met here in rising
Tr igger/alarm setting level
Conditions met here in falling
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>
Dead zone
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)
Conditions met here in rising
Tr igger/alarm setting level
Conditions met here in falling
(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 Selections available
User Text input (when User is selected)
Department name Text input (when User is selected)
Setting conditions switch Guest, User 1, User 2)
Macro file
name
Folder MEM, USB1
File
Name
Specify a file name.
Macro run
Press right key to execute.