Omega DPS3100 - Manual (Page 13)

Page 12
SETPOINT value. Once the desired SETPOINT value is displayed, push SETUP key to enter that value and go on to
setup channel 1's operational mode.
Setup for Universal Relay (Channel 1 Relay)
Channel 1 relay can be configured to work as a universal relay or as Channel 1
relay only. In universal mode, this relay gets activated when ever any channel on
the unit goes into alarm condition. In channel 1 mode, this output activates only if
process reading on channel 1 exceeds channel 1's programmed limit value.
Display format is 'C1 OnLY' (for 'Channel 1 only') or 'UnIVrSL' (for
'Universal'). Push ^v key to change to alternate mode and SETUP key after desired
mode is achieved.
Setup For Limits
After setting a channel's SETPOINT, the next parameter to be set is LIMIT.
DPS3000 Series uses the LIMIT parameter to determine when to activate output
signal for a specific channel. When a reading exceeds the LIMIT for that channel,
then that channel's output signal is activated. When the channel reading drops
below the LIMIT setting by the amount of the DEADBAND setting, then the
channel output is de-activated (if setup in non latching mode).
The display will first show 'CHx Lt' (x=channel #) after which the current
LIMIT value will be displayed. Use ^v key (ref. Setup For High Scale) to set the
desired LIMIT value. Once the desired LIMIT value is displayed, push SETUP
key to enter that value and go on to setup Deadband.
Setup For Deadband
After setting a channel's LIMIT, the next parameter to be set is channel's relay
DEADBAND. This parameter is used for eliminating relay "chatter" as a signal
hovers around its LIMIT value. When the channel reading drops below the LIMIT
setting by an amount equal to the DEADBAND, then the channel output is de-
activated. Minimum value of DEADBAND is 2.
The display will first show 'dEAd bd' after which present DEADBAND value
will be displayed. Use ^v key (ref. Setup For High Scale) to set the desired
DEADBAND value. Once the desired DEADBAND value is displayed, push
SETUP key to enter that value and go on to setup Relay as Normally Open/Closed.
Setup For Relay Normally Open/Closed
After setting DEADBAND, the next parameter determines whether the channel's output relay operates as a "Normally
Open" or "Normally Closed" style relay. The relay itself is a Single Pole Single
Throw (SPST) relay.
When this parameter is set for "Normally Open", the relay is open when it is
deactivated (readings are below LIMIT), and closes when the channel reading
exceeds its LIMIT value. When this parameter is set for "Normally Closed", the
relay is closed when it is deactivated (readings are below LIMIT), and open when
the channel reading exceeds its LIMIT value.
The display will show 'rLy N.O.' for relay Normally Open or 'rLy N.C.' for
Normally Closed setting. Use ^v key to toggle between the two settings. Once
the desired setting is displayed, push SETUP key to enter that value and go on to setting up Engineering Units.