11.1 LR8400-20, LR8401-20, LR8402-20 Memory HiLogger Specifications
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Chapter 11 Specifications
11
Alarm Output
Alarm Output Channels Four, non-isolated (Common GND with HiLogger)
Output settings Output occurs when the logical sum (OR) or product (AND) of alarm trig-
ger sources is true.
Alarm source
Analog input 30 channels (U1-1 to U2-15), or up to 60 channels (U1-1 to U4-15) with
additional input units
Integrated pulse in-
put
8 channels (P1-P8)
Digital input 8 channels (L1-L8)
Thermocouple burn-
out
When thermocouple burn-out detection is enabled
Alarm types
analog* and pulse
Level An alarm is output by input rising a
bove or falling below a preset level
Window
An alarm is output by input crossing into or out of a window defined by
preset upper and lower trigger levels
Trigger types digital
Pattern Mask Alarm Alarm when signals match the pattern mask (1, 0, and X)
(where X is "ignore")
Alarm level resolution (Analog) 0.1%f.s. (f.s. = 10 divisions)
(Pulse) Integration 1c, revolution 1/n (where n = pulses/rev)
Latch setting Alarm output can be set to be held (latched), or not.
Cancel Hold Enable Alarm Hold to latch alarm output without stopping measurement.
Beeper
Built-in beeper On/Off
Output form Open-collector output (with 5 V pull-up, active low)
Maximum switch rating
5 to 30 VDC, 200 mA
Output refresh At every recording interval
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