TESTO 6740, Instruction Manual

Page: 15 / 28

4. Initial operation
4.3 Analog output/Limit signal outputs
15
Limit signal outputs with 0554.3302 plug
Two floating contacts (NO contact) are available.
LS
LS=On
LS=Off
US=On
US=Off
Switch contact closed
Switch contact open
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D Drruucckkttaauuppuunnkktt,, °°C Cttppdd))
Definition Lower
Switch (LS),
default setting:
4°Ctpd
Definition Upper
Switch (US),
default setting:
10°Ctpd
H HY YS Stt, default
setting: 2K
H HY YS Stt
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Terminal 2
Terminal 3
US
Terminal 4
Terminal 5
M Maaxx.. cciirrccuuiitt::
30VDC/ 0.5A
Switching point
LS + HYST,
default setting:
6°Ctpd
Switching point
US + HYST,
default setting:
12°Ctpd
Default settings for other parameters (ppm, %RH, ...)
See 3.3 Settings, p.8
Example:
- The lower alarm shall be switched at +8 °Ctpd
- The higher alarm shall be switched at +12 °Ctpd
Set these values
- LS = 6 °Ctpd
- US = 10 °Ctpd
- Hyst = 2 °C
- Switching point lower alarm = LS + Hyst = 8 °Ctpd
- Switching point upper alarm = US + Hyst = 12 °Ctpd