Energy-Management Systems
Supply measured rate and total information to an energy-management system, distributed control system or district-wide monitoring platform.
CDIS BTU Energy Meter
CDIS Energy flow station for Saturated Steam flow energy measurement.
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The Cadillac® CDIS Remote display, also known as a BTU Energy meter, is designed to provide a local, wall or panel mounted display, for the Cadillac® CV-P, CV-HS, CV-U Vortex MASS flow meters in a saturated steam or fixed pressure gas flow application. The BTU meter display shares the same electronics platform and configuration architecture as the HEATX Energy / BTU Meter, providing the end user the same look and feel for either device. This BTU meter display is a rate and totalizing device, which is capable of calculating and displaying Volume, MASS, and Energy. Combined with Cadillac’s superior flow meter technologies the CDIS provides the most accurate, repeatable, and maintenance free energy system available in the industry.
The CDIS BTU Energy meter remote display with receive the compensated or MASS Pulse output from one the Cadillac® CV Vortex style meters, and will display, and retransmit (if desired) the Energy, consumed.
The New Industry Standard
Combined with Cadillac®’s superior flow meter technologies the CDIS BTU Energy Meter has quickly become acknowledged as the industry standard. Customers choose the Cadillac® CDIS remote display because of proven: Accuracy, dependability, consistency, low maintenance, reliability, and rangeability.
Technical Product Guide
Cadillac CDIS BTU Energy Meter
Review the CDIS remote display, applications, operating principle, output options, mounting dimensions, system integration requirements and model-number structure.
Remote Rate and Total Display
Wall or Panel Mounting
Programmable Outputs
Steam and Gas Applications
Product Overview
Remote Mass and Energy Display
The Cadillac CDIS is a remote display and totalizing device designed to receive a compensated or mass pulse signal from a compatible Cadillac CV-series vortex flow meter. It provides operators with a convenient local display while also supporting selected retransmission, pulse and alarm functions.
Depending on the configured measurement system, the CDIS can calculate and display volume, mass or energy in user-defined engineering units. The front display provides instantaneous rate, a resettable total and an accumulated total.
The CDIS shares its electronics platform and configuration architecture with the Cadillac HEATX energy meter. This gives facilities using both products a consistent operator interface and a familiar front-panel programming method.
Compatible Meter Family
Primarily documented for Cadillac CV-P, CV-HS and CV-U vortex meters
Application Basis
Saturated steam or fixed-pressure gas according to the paired meter configuration
Mounting Options
Wall-mount enclosure or panel-mount display
Selection note: Compatibility, measurement quantities and available outputs depend on the complete meter and display configuration. Confirm the proposed flow-meter pairing and process conditions with Cadillac Meter before specifying the system.
Applications
Central and Point-of-Use Measurement
When paired with the appropriate Cadillac flow meter, the CDIS provides local rate and total information for energy-management, operational-monitoring and cost-allocation applications.
Customer Billing
Support billing applications using accurately totalized mass or energy measurements when the complete system satisfies the applicable contractual and regulatory requirements.
Internal Cost Distribution
Allocate utility costs among departments, buildings or facilities using measured consumption within a campus-wide system.
Efficiency Monitoring
Monitor measured consumption from a central control room to support system-performance reviews and operating-efficiency assessments.
Boiler Measurement
Display direct mass or energy measurements near the boiler or other central generation equipment.
Point-of-Use Measurement
Measure consumption at individual buildings, process areas, heat exchangers or other defined points of use.
Application requirement: Measurement performance depends on the correct flow-meter size, process data, installation arrangement and CDIS configuration. Selection should be based on the complete operating range rather than nominal pipe size alone.
Display and Configuration
Local Indication, Programming and Outputs
The CDIS combines local rate and total indication with configurable scaling, optional linearization and output functions. Each display is configured for its intended application and can be adjusted through the front-panel keypad.
Local Display Functions
Instantaneous Rate
Displays the current measured flow, mass or energy rate
in the configured engineering units.
Resettable Total
Provides a total register that can be reset for a defined
operating period or monitoring task.
Accumulated Total
Maintains a separate accumulated measurement total for
longer-term system records.
User-Programmable Parameters
- K-factor: Sets the relationship between the incoming pulse signal and the displayed measurement.
- Decimal position: Configures how the selected rate or total is presented.
- Filter constants: Adjust the response and stability of the displayed value.
- Time base: Defines the time unit applied to the configured rate.
| Capability | CDIS Configuration |
|---|---|
| Measurement quantities | Volume, mass or energy according to the complete system configuration. |
| Linearization option | Optional 10-point linearization can correct for a non-linear K-factor or frequency input. |
| Relay outputs | Two solid-state relay outputs may be configured for pulse and/or alarm service, depending on the selected model. |
| Analog output option | A 4–20 mA DC output is included with the applicable model selection alongside the two configurable relays. |
Configuration note: The CDIS can be factory configured for the intended application and reprogrammed from the front-panel keypad. Confirm the required outputs, scaling and alarm functions when ordering.
Operating Principle
From Flow Signal to Usable System Data
The paired Cadillac flow meter performs the primary measurement and sends a compensated or mass pulse signal to the CDIS. The CDIS applies the configured scaling and calculation parameters, presents the measurement locally and provides the selected outputs to the connected monitoring or control system.
Step 1
Flow Measurement
The compatible flow meter measures the process flow and
produces the configured signal.
Step 2
Pulse Signal
A compensated or mass pulse signal is transmitted from the
flow meter to the CDIS.
Step 3
CDIS Calculation
The display applies the programmed K-factor, time base,
scaling and optional linearization.
Step 4
Display and Output
Rate and totals are shown locally and the configured outputs
are sent to other systems.
Information Shown Locally
- Instantaneous measurement rate
- Resettable measurement total
- Accumulated measurement total
- Configured engineering units
Available System Outputs
- Scaled or unscaled pulse output
- High or low alarm functions
- Two configurable relay outputs
- Optional 4–20 mA DC retransmission
Important distinction: The CDIS is the display, calculation and output interface within the measurement station. Overall measurement accuracy depends primarily on the correctly selected and installed flow meter, its calibration and the complete system configuration.
System Integration
Flow-Meter Connection and Field Wiring
In the saturated-steam system documented in the CDIS brochure, the wall-mount enclosure powers the paired CV-P vortex meter and receives its mass pulse signal. The CDIS then provides the local display and configured outputs required by the monitoring or control system.
Process Measurement
CV-Series Vortex Meter
The correctly sized and configured vortex meter performs the primary process measurement and generates the signal used by the CDIS.
Local Interface
CDIS Remote Display
The CDIS receives the incoming signal, applies the programmed scaling, displays rate and totals, and operates the selected relay or analog outputs.
External System
BMS, DCS or Control Panel
Configured outputs can provide measured data or alarms to a building-management system, distributed control system or external control panel.
| Connection or Function | Legacy Brochure Guidance |
|---|---|
| Flow-meter connection | Three-wire connection between the CV-P vortex meter and the CDIS enclosure. |
| Flow-meter power | The documented wall-mount enclosure supplies 24 VDC for operation of the paired CV-P meter through its internal power supply. |
| Pulse input | The CV-P sends its pulse input to the CDIS through the third wire and shares the common used by the power connection. |
| Relay outputs | Two solid-state relay outputs may operate external relays or suitable DC loads. Depending on configuration, a relay may provide a scaled or unscaled pulse output. |
| Analog retransmission | A 4–20 mA DC output is available with the applicable CDIS model-number selection. |
Wall-Mount Configuration
The legacy brochure describes a prewired, fuse-protected enclosure with an internal AC-to-DC power supply for field mounting and termination.
Panel-Mount Configuration
The panel-mount display is intended for applications where a suitable electrical enclosure and DC power supply already exist in the field.
Installation requirement: Final wiring, grounding, circuit protection, output loading, electrical isolation and hazardous-area practices must follow the approved project drawings and current product documentation. The information above is system-planning guidance, not a substitute for the installation instructions.
Mounting and Dimensions
Wall-Mount and Panel-Mount Options
The CDIS is available as a complete wall-mount enclosure or as a panel-mount display for integration into an existing electrical enclosure. Confirm the current dimensional drawing, panel cutout and required service clearances before fabrication.
Wall-Mount CDIS
The legacy brochure describes a prewired and fuse-protected enclosure with an internal 120 VAC to 24 VDC power supply for field installation and termination.
16.0 in
Legacy enclosure height
14.0 in
Legacy enclosure width
Panel-Mount CDIS
The panel-mount version is intended for installations where a suitable field enclosure, circuit protection and DC power supply are already provided.
6.0 in
Face width
3.9 in
Face height
3.4 in
Body depth shown
| Configuration | Dimensional or Installation Information |
|---|---|
| Wall-mount enclosure | The legacy drawing shows an enclosure approximately 16.0 inches high by 14.0 inches wide. |
| Wall-mount power | The model-number structure lists 100–130 VAC for the wall-mount configuration. |
| Panel-mount face | The legacy drawing shows a 6.0-inch-wide by 3.9-inch-high display face. |
| Panel-mount depth | The drawing shows a 3.4-inch body depth and approximately 1.0 inch of front projection. A separate 1.7-inch dimension is also shown near the side-profile base. |
| Panel-mount power | The model-number structure lists 12–24 VDC for the panel-mount configuration. |
Before cutting or mounting: These dimensions come from the legacy CDIS brochure and should be used for preliminary planning only. Obtain the current approved dimensional drawing and confirm the panel cutout, enclosure depth, cable-entry space, door clearance and service access before fabrication.
Product Configuration
CDIS Model Number Structure
The CDIS model number identifies the area rating, mounting arrangement, outputs, power supply, approval selection and linearization option. Build the code sequentially using one selection from each applicable position.
| Code | Selection Position | Meaning |
|---|---|---|
| CDIS | Product family | Cadillac remote display |
| D or I | Area rating |
D — General purpose I — Intrinsically safe |
| P or W | Enclosure |
P — Panel mount W — Wall mount |
| 0 or 1 | Outputs |
0 — Two relays for
pulse and/or alarm functions 1 — 4–20 mA DC plus two relays for pulse and/or alarm functions |
| DC or AC | Power supply |
DC — 12–24 VDC,
panel mount only AC — 100–130 VAC, wall mount only |
| A or C | Hazardous approval |
A — CSA approval
for the United States and Canada C — CENELEC approval |
| X or L | Linearization |
X — Standard,
without linearization L — Linearization included |
How to Build the Code
Select One Option at Each Position
Begin with CDIS, then add the required area rating, enclosure, output, power, approval and linearization codes in the order shown above.
Verification Required
Confirm Current Availability
The structure above is taken from the legacy CDIS brochure. Confirm current model combinations, certifications and approval status with Cadillac Meter before preparing a final specification.
System Specification
Performance and Selection Guidance
CDIS performance must be considered as part of the complete measurement station. The display processes the incoming signal, but overall measurement accuracy and range depend on the paired flow meter, process conditions, calibration and installation.
Complete-System Selection
Select the flow meter and display using the actual fluid, pressure, temperature, line size and required operating range. Nominal pipe size alone is not sufficient.
Factory Configuration
The CDIS can be configured for the selected meter, units, scaling, outputs and alarm functions before shipment. Front-panel adjustment remains available where required.
Installation Conditions
Straight run, piping disturbances, electrical environment, enclosure requirements and output loading must be reviewed for the actual installation.
| Brochure-Defined Item | Selection Guidance |
|---|---|
| Primary flow-meter families | The product-specific brochure identifies Cadillac CV-P, CV-HS and CV-U vortex meters for saturated-steam or fixed-pressure-gas mass measurement. |
| Saturated-steam accuracy | The legacy system specification states ±1.00% of rate for the correctly configured vortex meter in saturated steam. This is not a standalone CDIS display-accuracy specification. |
| Turndown | The brochure states up to 30:1 turndown when the flow meter is selected as the best fit for the stated process conditions. |
| Calibration | The legacy saturated-steam system specification calls for a NIST-traceable calibration certificate supplied with the measurement system. |
| Straight-run requirements | Confirm the required upstream and downstream straight run for the selected flow meter, line size and actual upstream disturbance. Do not apply one generic distance to every installation. |
| Certifications and approvals | Confirm current area classifications, hazardous approvals, enclosure rating and applicable certification status at quotation. |
Compatibility Requires Confirmation
The current product webpage contains broader input language that mentions CMAG, EMAG, CV and CU meters. The attached CDIS brochure defines the product around CV-series vortex systems. Any proposed use with CMAG, EMAG, CU or another pulse-producing meter should therefore be reviewed and confirmed by Cadillac Meter before the CDIS is specified.
Request a Configuration Review
Information Required for CDIS Selection
Provide the following information so Cadillac Meter can review the process conditions, verify flow-meter compatibility and configure the appropriate CDIS display, enclosure and outputs.
Process and Piping Data
- Fluid and application, including saturated steam, fixed-pressure gas or another proposed service
- Minimum, normal and maximum flow rate
- Operating pressure and temperature, including expected variation
- Pipe size, schedule and material
- Available upstream and downstream straight run
Display and Electrical Requirements
- Preferred wall-mount or panel-mount arrangement
- Available power supply
- Required local measurement units and total functions
- Required pulse, alarm or 4–20 mA outputs and receiving-system details
- Area classification, certifications and enclosure requirements
Next Step
Configure a CDIS Measurement Station
Cadillac Meter can review the application, paired flow meter, display configuration, output requirements and installation conditions before quotation.
Technical content is based on the Cadillac CDIS General Information brochure, Rev. 1108, and the current CDIS product page. Confirm current product availability, certifications and project-specific requirements with Cadillac Meter.