Datasheet

JUMO GmbH & Co. KG
Delivery address: Mackenrodtstraße 14
36039 Fulda, Germany
Postal address: 36035 Fulda, Germany
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Internet: www.jumo.net
JUMO Instrument Co. Ltd.
JUMO House
Temple Bank, Riverway
Harlow, Essex CM 20 2DY, UK
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Internet: www.jumo.co.uk
JUMO Process Control, Inc.
6733 Myers Road
East Syracuse, NY 13057, USA
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Internet: www.jumousa.com
V2.00/EN/00541512
Page 4/18Data Sheet 202552
20255200T10Z002K000
Additional functions of
the JUMO dTRANS CR 02
Min/max value memory
This storage records the minimum and
maximum input quantities that have occurred.
This information can be used, for example, to
assess whether the design of the connected
sensor is suitable for the values that actually
occur.
Binary input
The following functions can be accessed
through the binary input:
• Key lock activation
When this function is activated, operation
is no longer possible via the keypad.
• "HOLD" mode activation
When this function is activated, the
outputs (analog and relay) adopt the states
previously defined.
• Alarm suppression (controller alarm only)
This function is used to temporarily
deactivate alarm generation by means of
the appropriately configured relay.
•Flow-rate measurement (counting input)
Instantaneous value
Partial quantity
Total quantity
Bridging the corresponding connection
terminals with a floating contact (for example
a relay) activates a predefined function.
Deposit detection
Deposit detection can be activated for four-
electrode cells.
It may happen during normal operation that a
coating forms on the electrodes. Because of
this, the conductivity that is displayed is lower
than the actual conductivity. When the
"Deposit detection" function is activated, cell
maintenance is required.
Auto range
In some processes it is advantageous to have
two measurement ranges available, for
example in rinsing and regeneration
processes.
Normally in these processes a low
conductivity must be recorded exactly. In the
case of rinsing/regeneration, however, the
conductivity is significantly higher, which
would result in measurement overrange
(error). The Autorange function can be used to
define two measurement ranges between
which the instrument switches in a defined
manner.
Wash timer
A software function can be used to trigger
cyclically recurring actions by controlling a
relay.
Control functions
Functions can be assigned to the relays. The
functions can be configured in turn by
parameters P, PI, PD and PID structures can
be freely programmed as control functions.
Relay outputs
Two relay changeover contacts are available
for the main measurement variable and/or the
temperature.
The following functions can be programmed:
• Switching direction
(min/max)
• Limit controller
(on-delay/delayed release, hysteresis)
• Pulse length output
(see control functions)
• Pulse frequency output
(see control functions)
• Modulating function
(see control functions)
• Pulse functions
With this function, the output briefly
switches on when the switching point is
reached and then switches off again
• Wash timer elapsed
•Alarm
• Sensor/range error
• Behavior in the event of an alarm,
underrange or overrange measurement,
calibration and "HOLD"
Flow-rate measurement
Flow rate transmitters can be connected
directly to the binary inputs. One input is
available for "slow speed" (up to about
300 Hz) and one for "high speed" (up to about
10 kHz). The current flow rate, partial quantity
and total quantity can be displayed in different
units (l/s, l/min, l/h, m
3
/min, m
3
/h, GAL(US)/s,
GAL(US)/min, GAL(US)/h, or l, m
3
, GAL(US)).
Datalogger
Up to 43,500 data sets can be stored in the
datalogger (ring buffer). Depending on the
resolution, that corresponds to a storage time
ranging from about 10 hours to 150 days.
Data can be read by means of the setup
program and then further processed with an
"Office" product.
The datalogger makes it possible to record
and document processes and supports
analysis of the same processes.
Contact functions
Max. limit function
Min. limit function
Alarm window 1
Alarm window 2
Pulse contact
Triggering condition longer than pulse
duration
Hysteresis
Setpoint
pH
On
Off
Limit
Hysteresis
Limit
pH
On
Off
Setpoint
Hysteresis
Setpoint
pH
On
Off
Limit
Distance
Hysteresis
Setpoint
pH
On
Off
Limit
Distance
Time
On
Off
Pulse duration
Pulse
contact
Time
On
Off
Trigger
condition