Inputs; Trigger; Analog Input; Emissivity/Slope Setting - Fluke Endurance Series User Manual

5.6 Inputs

5.6.1 Trigger

The trigger input can be used as switch to initiate one of the following:
•
Restarting the signal processing, see section 6.3
•
Toggling the pointing device (LED, laser, camera) between on/off, see ASCII command XL
The trigger function is activated by shorting the external input to digital ground (pin L). The shorting can be done
with an external switch, relay, transistor, or TTL gate.

5.6.2 Analog Input

The analog input is galvanically isolated and processes currents in the range of 0 to 20 mA or 4 to 20 mA. The
following functions can be executed via the analog input:
•
Setting the emissivity value (preferential for sensors in 1-color mode)
•
Setting the slope value (for sensors in 2-color mode)
•
Setting the temperature for the background temperature compensation
•
Reading the current from an external device using the ASCII command <IN>

5.6.2.1 Emissivity/Slope Setting

The analog input can be configured to accept an analog current to provide real time emissivity setting for sensors
in 1-color mode (or slope for sensors in 2-color mode). The following table shows the relationship between input
current and emissivity:

Table 5-2: Ratio between Analog Input Current and Emissivity (Example)

Use the adequate ASCII commands to configure the analog input, see section 14.5.2
and section 14.5.3 Background Temperature
Post

Figure 5-8: Wiring the Trigger Input

Sensor
Trigger (F)
Ground (L)

Figure 5-9: Wiring the Analog Input

Sensor
+ mA In (D)
- mA In (C)
I in mA 0.0 2.0
Emissivity 0.1 0.2
Compensation, page 122.
Processing, page 55.
0 – 20 mA
I
4 – 20 mA
...
18.0 20.0
...
1.0 1.1
Emissivity
Installation
Inputs
Setting, page 122
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