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Relay Truth Table (GaugerGSM/485 only)
Some Gauger models support relay operation. Relay A operation is defined by USB command RLY and
Relay B operation is complementary to Relay A. When Relay A is Short, Relay B is Open and vice verse.
Electrical connections are described in the Physical and Electrical Installation Guideline Chapter.
The RLY command is defined in the list of commands for configuration from a PC section and consists of
four configuration parameters:
 Mode (0,1,2)
 Value (numerical value)
 Direction (0,1)
 Hysteresis (numerical value)
The following truth table summarizes options.
Mode Value Direction
0
x
x
1
v
1
1
v
1
1
v
0
1
v
0
2
x
1
2
x
1
2
x
0
2
x
0
Hysteresis
x
h
h
h
h
x
x
x
x
Theft
x
x
x
x
x
No
Yes
No
Yes
Previous
x
x
short
x
open
x
x
x
x
New relay state
Open
IF(reading > v ) then close
IF(reading > v-h) then open
IF(reading > v) then open
IF(reading < v-h) then close
open
close
close
Open
X designates “not important” in this table.
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GaugerGSM/485 – User Manual
page 108 of 126
May 2014 Rev 4.4