Metrohm 781 pH/Ion Meter - Manual (Page 167)

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

I
nac
tiv
e

M
od
e pH

M
ode
T

M
ode
U

pH
C
al

E
l. T
es
t

M
od
e C
on
c

Co
nc
Ca
l

<EN
TER
>
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