TESTO 6740, Instruction Manual

Page: 17 / 28

17 5. Menu guide
Set lower switching
point (LS)
6
= +1
= Next digit
Set upper switching
point (US)
6
= +1
= Next digit
Set hysteresis value
(HYSt)
= +1
= Next digit
Test limit signal outputs
(tESt)
-0- = Both operating
points off
-1- = Lower operating
point on
-2- = Upper operating
point on
Select with
Activate with
Reference value > -60°tpd
(rEF)
9
= +1
= Next digit
Carry out reset (rES)
nor = No reset
rS = Reset (return to
default setting))
Select using
Notes:
1
If there are breaks in the input, the system returns automatically to
the display mode after approx. 1min.
2
In the case of the units ppm and Abs (mg/m3), values are
displayed/entered to the power of ten. Examples:
15E1 corresponds to 15 x 10 = 150, 02E2 corresponds to
2 x 100 = 200, 21E3 corresponds to 21 x 1000 = 21000
3
Keep button pressed (1s/3s/5s/10s, corresponding to setting
in

, default setting: 5s).
4
Only with deactivated code (can be set in P Prroogg - U UC Coodd menu).
5
Absolute pressure (can be set in P Prroogg - P Prreess menu) is included in
the calculation of the ppm value and atmospheric dew point (°CtA/
°FtA).
6
For negative values: select “-“ at left digit position.
7
To deactivate codes: Enter 0000. Important: Note down the code
at a suitable point, operation is impossible without a valid code.
8
Can only be used together with the 0554.3302 plug.
9
Menu is only available if one of the following units is set: °Ctp, °Ftp,
%rF, %Hr or %rh (can be set in U
Unniitt menu). Also see 6. Adjustment
on site, p. 18.
10
General password (always valid): 6810
11
The displayed reading flashes if the scaling limits are exceeded
(can be set in Menu U
UN NIITT - S S-LLoo or S S-H Hii).
12
Compare chapter 6.
13
Display blinks if actual values are below 4mA setting or above
20mA setting.
ALAr
8
AdJ
12
rST
Return to ALAr
Return to AdJ
Return to rSt
Return to UNIT