Metrohm 780 - Functions of the Individual Remote Lines

9 Annex
780/781 pH/Ion Meter, Manual
157
9.5.2 Functions of the individual remote lines
Name Pin Function
Input 0 21
Print/Start
Outputs a measuring points or results report with
stepping impulse (Output 3)
t
Puls
> 100 ms
 Inactive
 Mode pH
 Mode T
 Mode U  pH Cal  El. Test  Mode Conc
 Conc Cal 
<ENTER>
Input 1 9     
 = active (low)
t
Puls
> 100
ms
Input 2 22    
Input 3 10   
Input 4 23   
Input 7 12
Ready
"Ready" signal from 865 or 876 Dosimat Plus
(Conc mode: automatic calibration or standard /
sample addition)
Output 0 5
Ready
Instrument is in measuring mode and all runs are
finished
Output 1 18 Prim. meas. value: if above
upper limit
: active (low)
Output 2 4 Prim. meas. value: if below
lower limit
: active (low)
Output 3 17
Stepping impulse
after successful measurement, t
Puls
> 80 ms
Output 4 3
Stirrer control
Output 5 16
Error
(see Section 8.2)
Output 6 1 Sec. meas. value: if above
upper limit
: active (low)
(781: with autom. addition:
FILL
for 865/876, t
Puls
>10 ms)
Output 7 2 Sec. meas. value: if below
lower limit
: active (low)
(781: with autom. addition:
impulse
for Dosimat Plus, t
Puls
= 1.25
ms)
+5 V 15 I ≤ 40 mA, R
i
≈ 12 Ω
0 V: active (low), 5 V: inactive
0 V 14/25