Hach-Lange DR 3800 User Manual - Manual (Page 81)

81
Advanced Operations
Entering the next calibration formula (C2 or Cn)
1. Highlight C2: Off and press Edit.
2. Select C2: Off again and press Edit. The display switches to
C2: On.
3. Highlight the next line C2 = to define the formula and press
Edit.
In addition to the keys described in Table 11 , only one other
function is available:
Select Conc. key
If an already defined formula, in this case C1, is to be taken into
account in the formula for C2, press Select conc.
Enter the number of the formula (e.g. 1 for C1) and press OK to
confirm.
Cn can now be linked with a mathematical operation.
Note: The Cn concentrations that are to be calculated are numbered in
sequence: C1, C2, C3, etc.
Note: When the first Cn formula has been defined, the Formula list is
automatically extended by Cn+1.
>=<
Press >=< to include logic statements/links/conditions in
the formula. The following functions are available:
= (Equal to), < (Less than), > (Greater than), <= (Less
than or equal to), >= (Greater than or equal to), IF,
THEN, ELSE
When the evaluation formula C1 has been entered
completely, press OK to confirm. Press OK again to
return to the Formula display.
When the formula C1 has been entered and confirmed,
the parameter name, upper and lower limits of the
measuring range and display result (yes, no) can be
entered.
Table 11 Edit formula key descriptions (continued)
Screen Key Description