Thermo Fisher Scientific Alpha RES 1000 - Manual (Page 22)

Operating Instructions Alpha RES 1000
15
7.3.6 Setting an off-delay time lag
You can set as time delay for each relay, which stops the relay from switching off the moment the value
reached the set point and hysteresis. This controller lets you set a 0 to 1999 seconds time delay before your
relay deactivates.
0
OF.d
HOLD SETUP
1) Follow directions in 7.3.1 to enter Control Relay mode.
2) Push the ENTER key. The upper display shows “0” time and the
lower display shows “OF.d”.
3) Press the Δ or ∇ keys to enter on-delay time for Set point 1 (Set
point 2). Controller will delay activation for the number of seconds
(0 to 1999) selected (Default off delay is 0).
4) Press the ENTER key to confirm your selection.
5) Continue with Advanced Set-up mode procedures, or return to Measurement mode by pressing the
Δ and
∇ keys simultaneously (escape).
7.4
Controller (Cntr) sub-function
You can set the controller’s parameters in this sub-function.
7.4.1 Entering the Controller sub-function
1) Enter Advanced Set-up mode. Push ENTER key and scroll to Advanced set-up security code “22”.
Push ENTER key.
2) Press Δ or ∇ keys to scroll until upper display shows “Cntr”.
Cntr
HOLD SETUP
L.Ct
tYP
oFF
tYP
HOLD SETUP
PLC
tYP
HOLD SETUP
PFC
tYP
HOLD SETUP
7.4.2 Choosing the controller type (limit or proportional)
This mode lets you choose your controller type: limit control, pulse length proportional control, pulse frequency
proportional control, or control off.
-
Use limit control with pumps or values for fast response.
- Use pulse frequency proportional control to operate your pumps smoothly.
- Use pulse length proportional control for precise control of proportioning valves.
-
Use control off to operate controller as a monitor only or to keep relays from switching.