Description of the relay outputs
36
Function
Contact
Action
LV2
Relay switches if limit value
1
or measuring point 2
have been exceeded
Volt-free
change-
over
contact
programmable:
- Continuous contact
- Impulse (1 - 99 seconds/minutes)
- Interval (1 - 99 seconds/minutes)
- Hysteresis (1, 2 or 3 limit values
exceeded)
For a detailed description and programming refer to the section enti-
tled
"Switch functions of the limit value outputs LV1 and LV2"
!
Measuring points 1 or 2
(measuring point switch-
over)
The Testomat 2000
®
DUO can be used to monitor two measuring
points. Two external valves that can be controlled via the terminals 9,
10, 11 are required for this task. The menu item "2 measuring points"
must be selected for this option.
Measuring point switch-over occurs automatically alternating with the
analyses. The parameters are strictly allocated to the measuring
points:
Measuring point 1 = Parameter 1 (indicator type 1)
Measuring point 2 = Parameter 2 (indicator type 2)
In
, select
=>
=>
Select "2 measuring points"
Press "ENTER" to confirm the selection
Measuring point switch-over can be surpressed by a contact (or nor-
mally closed contact) at input IN1. The active status of IN1 has to be
programmed accordingly.
IN1 active = Measurements only from measuring point 1
A switch-over of the measuring points also only occurs after comple-
tion of the "Hysteresis" function.
Limit value 2
Terminals 6,7,8
Measuring point
switch-over
Terminals 9,10,11
▼▲
