6
Operating instructions
6 Function
The pyrometer measures the temperature without contact to the target.
The infrared sensor is equipped with an analogue output and two open collector
outputs. The instrument‘s display panel shows the measured temperature.
• Analogue output 0/4 - 20 mA
• OUT1: Switching signal dependent on the set temperature
• OUT2: Switching threshold dirt alert, sync-pulse or inner device temperature
6.1 Analogue output
The pyrometer is equipped with an analogue output 0/4...20 mA. The maximum
load is 500 Ω. The output current is linear to the measured temperature. The
source must be defined before the current output can be used.
The following sources are available:
• Two-colour mode: [
Ao
] → [
Ao.S
] =
QUot.
• One-colour mode: [
Ao
] → [
Ao.S
]=
SpEc.
Within the overall measuring range, the required measuring range can be set to
°C or °F using parameter [
Ao. _
] (scale beginning) and parameter [
Ao. ~
]
(scale end). There is also the possibility, to switch OUT2 between 0 - 20 mA and
4 - 20 mA.
Scale beginning [
Ao
] → [
Ao. _
]
Scale end [
Ao
] → [
Ao. ~
]
Change 0/4 - 20 mA [
Ao
] → [
Ao.04
] =
0-20
/
4-20
First, the beginning of the scale [
Ao. _
] in °C or F is entered, then the end of
the scale [
Ao. ~
]. By changing [
Ao. _
] also changes [
Ao. ~
], so that the
range remains the same. If [
Ao. _
] is increased so far, that the range can not be
adhered to, as [
Ao. ~
] would otherwise exceed the maximum, [
Ao. ~
] is kept
at its maximum. If [
Ao. _
] is then reduced again, [
Ao. ~
] is also immediately
reduced again. The minimum span is given in the technical data of the respective
device.