SMART INDICATOR DM4000 Series
Universal, Pulse or Flow Measurement 6 Digit display Front Panel Sealed to NEMA 4 Analog Output Option 1, 2, 3 or 4 Alarm Option RFI Protected Metal Case Serial Communications Rate or Total Display 5 Year Warranty
INTRODUCTION The DM4000 is a highly accurate digital process indicator, available in three versions: DM4000U accepts common industrial sensors DM4000C accepts various types of pulse inputs to provide RATE and TOTAL functions. DM4000A is a dedicated Flow Computer accepting analog inputs and providing RATE and TOTAL functions. A wide range of options are available enabling the DM4000 to be used in a variety of applications.  Two output slots are provided, each of which can accept either a single or dual alarm relay output, an isolated 4 to 20 ma output card or a bridge excitation card.  A dedicated communications slot is also provided which can accept an RS485 serial digital communications card. The sensor type and range are user configurable, either from the front panel or via the optional serial communications port.  All ranges are fully calibrated which means the user can change quickly and easily from one sensor type to another.  The analog outputs can be any part of the incoming range allowing the DM4000 to be used as a 'smart' sensor transmitter. The NEMA 4 sealed front panel protects the DM4000 against environmental conditions such as water and dust. Reduced stock holding due to the versatility of the DM4000 combined with it's exceptional accuracy and stability and 5 year warranty, provides for a 'low cost of ownership'. APPLICATIONS Process monitoring Strain gage measurement Flow measurement Alarm monitoring Data logging Batch controlling Speed measurement Data Acquisition GENERAL FEATURES Display - When used as an analog or frequency indicator, 5 digit resolution is provided.  The Totalizer has 12 digit resolution displayed in two 6 digit displays.  Display update rate is 13.3 Hz. Programming - All parameters can be entered from 3 keys on the from panel or via the optional communications port.  Programming is done by pressing combinations of the three sealed front panel keypads through a series of menus which are displayed on the 6 digit display in helpful mnemonics.  Lack of keypad use returns the instrument to the run mode.  The keys are used individually to review setpoints and clear latched alarms. Communications - RS485 communications are optional.  By using an RS485/232 converter unit, up to 99 DM4000s may be connected to a host computer to allow access to all configuration and process variable information.  In addition, the Remote Configuration Package (RCP4000) is available which allows rapid configuration via a PC.  Although 99 DM4000s can be interfaced on the network RS485 requires additional buffering for more than 32 units. Front Panel - The front panel membrane is sealed to NEMA 4.  User replaceable legends and identifying tags are protected by the membrane. Filter - The input has a programmable 'Smart' digital filter which can be used to smooth out noisy signals. Self Testing - Background self testing is continuous and an internal watchdog monitors the correct operation of the internal microprocessor.

OUTPUTS
Two output slots are provided which can accept a variety of output option cards.

All alarms can be: High, Low or Deviation and have programmable hysterisis.  They can be set to fail safe high or low and can be latching or non-latching.  The analog output can be any part of the input range.

In the DM4000A and C versions the relay output can be programmed to give a 100 ms output at decade intervals from the TOTAL display.  (e.g.. every 10 GAL or 100 GAL etc.)

OPTIONS SPECIFICATIONS @ 68 °F

ENVIRONMENTAL SPECIFICATION

DM4000U - UNIVERSAL INPUT PROCESS INDICATOR
The DM4000U is a universal digital indicator which can be configured from the front panel to take all common industrial sensors without the need to change option boards or move jumpers.  There are two output slots which can accept any of the optional output boards.

DM4000U SPECIFICATIONS @ 68 °F

A/D conversion rate is 10 per second

USER LINEARIZATION
A user defined linearization table is provided for non-linear functions.  In addition, the user can select a square root, power 3/2 or power 5/2 function.  All displays are in engineering units.  This feature is only available for voltage and current inputs.

FIELD TRANSMITTER SUPPLY
An internal 21 VDC supply to power two wire 4 to 20 ma field transmitters is standard.  A programmable excitation supply for transducers is available as an option.

DM4000C - PULSE INPUT RATE or TOTAL INDICATOR 
The DM4000C accepts all types of pulse inputs and provides a choice of RATE or TOTAL displays.  RATE is in engineering units and TOTAL can have its own scaling.  The TOTAL can be reset locally from the front or remotely from an external contact and is stored during power down.

The instrument has two individual inputs channels 'a' and 'b'.  Either channel may be designed as the prime frequency input channel or alternatively as the control channel.  User selection of channels is determined by the type of input.

Input signals accommodated by the channels are as follows:

Frequency Range
0.03 Hz to 50 Hz for potential free contacts
0.03 Hz to 20K Hz for all other input types

Debounce
A 4 ms Debounce is available to eliminate edge jitter for frequencies below 50 Hz.

Frequency Measurement
The incoming frequency is measured by a combination of period measurement and pulse counting.  A 100 ms window is used for all incoming frequencies above 10 Hz.  This is called the capture window.  For frequencies below 10 Hz the capture window becomes the actual incoming period.  The following table illustrates the point.

Characterization
A 12 point user linearization table is provided as is selectable 'Cut lo' feature which automatically sets the Rate to engineering low range for frequencies that fall below this programmable value.  Relay options may be configured as alarms or pulse output if used in conjunction with total.

FIELD TRANSMITTER SUPPLY
An internal 8 VDC power supply to power field transmitters is standard.

DM4000A - ANALOG INPUT FLOW COMPUTER INDICATOR
The DM4000A is a combination of the analog input handling of the DM4000U with RATE and TOTAL functions of the DM4000C providing a special instrument designed for flow measurement applications.

The input can be either voltage or current and it is normally used in conjunction with a differential pressure sensor and some type of restriction e.g. orifice plate, flume, rectangular or 'V' weirs, to provide a digital representation of flow.

DM4000A SPECIFICATIONS @ 68 °F

The appropriate characterization can be selected from the front panel and the display scaled in linear flow units.  In addition, a 13 point user defined characterization is available for the more unusual applications.

The display may be selected to show RATE or TOTAL; TOTAL having its own user programmable scaling.  When displaying flow RATE, totalizing is performed in the background and pressing a front panel key provides a 'View' facility.  If  TOTAL is selected as the main display, it is possible to 'View' the instantaneous RATE.

Output options can be dedicated to either RATE or TOTAL and the TOTAL is maintained during power down stored in EEPROM.

In addition, the relay output option can be configured as a pulse output giving a contact closure for 100 ms every time there is a change in a particular selectable digit on the TOTAL display, i.e. the contact will close for 100 ms say every 100 gallons.  This provides a low cost means of interfacing with data logging systems or to drive additional secondary counters.

FIELD TRANSMITTER SUPPLY
An internal 21 VDC supply to power two wire 4 to 20 ma field transmitters is standard.  A programmable excitation supply for transducers is available as an option.

ORDER CODE

DM4000(Type) / Option 1 / Option 2 / Comms / Supply

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