Dostmann Electronic P700-EX, Operating Instructions Manual

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1.3.3 Temperature difference / (L in2) [T1 – T2] activate / deactivate
only for 2-channel devices (P705-EX / P715-EX / P755-EX / P755-LOG-EX)
To display the temperature difference push (ENTER/MENUE). Use the up and down keys ( ) to select
L in 2. Push again (ENTER/MENUE). On the right corner of the display appears a T1-T2. Use the up and
down keys ( ) to adjust the requested selection. Push (ENTER/MENUE) to confirm. Push (ESC) to re -
vert back to the measuring mode.
Note: Both channels have to be activated for displaying temperature difference.
MENUE
UniT Prob L in 2 CAL Lo6 Chnl
nur / only
P710-EX/715-EX
P755-LOG-EX
nur / only
755-LOG-EX
nur / only
2-Kanal Geräte
nur / only
2-Kanal Geräte
1.3.4 Calibration function / (CAL)
Despite high quality manufacturing techniques, each probe is slightly different from specified standards.
To eliminate inaccuracies caused by exchanging or ageing of probes, the instrument offer easy calibration
functions which guarantee that the system accura cy is always as good as if the instrument was specifically
calibrated to the individual probes in our laboratory.
The instruments offer five different calibration options:
1) (CoFF): Standard characteristic curve
(e.g. Pt100-resistance according EN60751)
2) (oP 1) : Calibration by code (2 x four digit code) is equivalent to a 2-point calibration.
The code is marked clearly by a label on each standard probe.
3) (oP 2): Calibration by physical standard references
(1-point, 2-point or 3-point calibration)
CAL = calibrate
Push (ENTER/MENUE) to calibrate the instrument with sensor. Use the up and down keys ( ) to select
CAL. Push again (ENTER/ MENUE). On the left corner of the display appears a small 1, which indicates the
selected channel. To change the channel (1 or 2) use the up and down keys ( ). Push (ENTER/MENUE)
to confirm.
Use the up and down keys ( ) to select the
requested calibration option.
Push (ENTER/MENUE) to confirm.
MENUE
UniT Prob L in 2 CAL Lo6 Chnl
nur / only
755-LOG-EX
nur / only
755-LOG-EX
nur / only
2-Kanal Geräte
nur / only
2-Kanal Geräte
CAL
CoFF oP1 oP2
3) Calibration by physical standard references / oP 2
Use the up and down keys ( ) to select oP 2 . Push (ENTER/MENUE) to
confirm. On the bottom of the display appears 1 P. For changing between a 1-Point (1 P),
2-Point (2 P) or 3-Point (3 P) - cali bration use the up and down keys ( ).
1) Standard calibration according to DIN EN60751 / (CoFF)
Use the up and down keys ( ) to select (CoFF). Push (ENTER/MENUE) to confirm. Push (ESC) to revert
back to the measuring mode.
2) CaIibrationby code / oP1
Use the up and down keys ( ) to select oP 1 . Push (ENTER/ MENUE) to confirm. On the left side of the display
appears a small 1 , after this number a four-digit number (Hex-Code/0..F) is dis played. The 2x four-digit
code is printed on the sensor label (see illustration). For changing the number use
the up key ( ). To step to the next number use the down key ( ). lf the requested
number is complete then push (ENTER/MENUE) to confirm. At the bottom of the
display a very small 2 appears, after which a second four-digit number is displayed.
For changing the number please follow the manual as before. Push (ESC) to revert
back to the measuring mode.
Note:
After confirming oP 1 by pushing (ENTER/MENUE) the function oP 1 (calibration by code) is activated, even
though you leave the menu by pressing (ESC).
Display-indication with active calibration code (oP 1):
The CAL -segment and the small 1 on the left in front of the measured value indica-
tes to the user that oP 1 is activated.
CAL
°C
CAL
°C
CAL
°C
CAL
°C
CAL
°C
1 P 2 P 3 P
oP 2
Example of a 1-Point calibration:
Push (ENTER/MENUE) to confirm. On the display appears Go . After the displayed measuring
value is stabil push (ENTER/MENUE). App. 2 seconds later in the first display line appears P1
(measuring value 1); in the second display line appears dP. (standing for decimal point).
Use the up and down keys ( ) to select the number of digits after decimal point:
dP. = two decimal digits
dP . = one decimal digit (decimal point is jumping one digit to the right)
Push (ENTER/MENUE) to confirm. On the second line of the display appears
Si- . Use the up and down keys ( ) to select the requested sign.
Si = reference standard shows a negative measuring value (below 0,00°C)
Si = reference standard shows a positive measuring value (above 0,00°C)