Keller Acculevel Data sheet

HigH AccurAcy SubmerSible level TrAnSmiTTer

THermAlly-compenSATed, cuSTom rAngeS, duAl ouTpuT SubmerSible

Acculevel

The Acculevel by Keller America provides standard features that far exceed those of comparably priced trans-

mitters, including standard ±0.25% FS or optional ±0.1% Total Error Band (TEB)3 accuracy. This level transmitter

is approved to NSF 61 and NSF 372

standards for water quality and includes Keller America’s guaranteed

lightning protection, making the Acculevel an outstanding value for liquid level measurement.

The ability of the Acculevel to provide this level of sustained performance over a wide range of operating

conditions makes it ideally suited to an equally wide range of applications, including drinking water, stream and

reservoir level, environmental monitoring, tank level, wastewater, and for installations in areas prone to chronic

damage due to transients caused by lightning.

For more information on the Acculevel, or any other Keller product, please contact Keller America, or view the

entire Keller catalog at http://www.kelleramerica.com/datasheets.html.

FEATURES

NSF 61 / NSF 372 approved construction for use in drinking water applications

4...20mA models include guaranteed lightning protection at no additional cost.

16-bit internal digital error correction for cost-effective low Total Error Band (TEB)

316L stainless construction standard - Optional Titanium for severe applications.

2-year warranty covers defects in materials and workmanship.

User-rangeable analog output ensures compatibility as requirements change.

RS485 modied-MODBUS compatible interface allows up to 128 transmitters on a single bus.

Standard dual (analog & RS485) outputs simplify interface to controls, data collection, and telemetry systems.

Built in the U.S.A. ARRA Section 1605 Compliant.

Standard 3-day lead time

KELLER America Inc.

Newport News, Virginia

www.kelleramerica.com sales@kelleramerica.com

Output White Black Red Blue Yellow

2-wire

(mA)

3-wire

(VDC)

OUT /

GND

+Vcc N/A RS485A RS485B

GND +VCC +OUT RS485A RS485B

Braided shield wire connected to transmitter housing

Min. pipe bend radius 1” IPS 1.5” IPS 2” IPS

Schedule 40 22” 4” 3”

Schedule 80 22” 6” 4”

Edition 07/2019

Subject to alterations

877-253-5537

 757-596-6659

Pressure Ranges

1,2

Relative Innite between 0...3 thru 0...900 ft W.C.

Absolute Innite between 0...2 thru 0...11 bar

1.The Acculevel can be provided with custom calibration at no extra cost. For uids other than water,

the specic gravity must be given at the time the order is placed.

2. Intermediate ranges are realized by deranging the analog output from the next highest basic range:

1, 3, 10, and 30 bar (relative) 2, 4, and 11 bar (absolute). Level range may be specied in units of lb/

in2(psi), inches WC or feet WC. Keller America uses the International Standard conversion of 2.3067 feet WC/psi.

Accuracy

Static Standard ±0.1% FS, Optional ±0.05% FS

Total Error Band Standard ±0.25% BR, Optional ±0.1% BR

3. Static accuracy includes the combined effects of non-linearity, hysteresis, and non-repeatability at room temperature (25°C). Total Error Band (TEB) includes the combined effects of non-linearity, hysteresis, and non-repeatability as well as thermal dependencies, over the compensated temperature range, expressed as a percentage of the basic range (BR).

The calculation for maximum TEB on intermediate ranges (IR) is:

TEBIR = (BR/IR) X TEB

Output

Current 4...20mA + RS485

Voltage

Resolution

4. Other voltage output options available on request.

5. Resolution applies to digital output only. Analog resolution is continuous and limited by the process meter and not the instrument.

0...5, 0-10VDC + RS485

0.002%

Certications

CE EN50081-1, EN50082-2

NSF / ANSI

61, 372

Electrical

Supply (4-20mA) 11-28 VDC

Supply (0-5VDC) 8...28 VDC

Supply (0-10VDC) 13...28 VDC

Load Resistance (mA) <(Supply-11V)/0.022A

Load Resistance (VDC) >4k ohm

6. Nominal values may be higher depending upon cable length. Internal lightning protection increases

the minimum-required supply voltage from 8VDC to 11VDC, due to internal resistance of the surge protectors. In addition, cable resistance (~70Ω / 1000ft) adds to the supply requirement. In order to

insure proper system operation, calculate the minimum required supply voltage (at the source) as follows:

For two-part (internal+external) system (recommended):

MINIMUM SUPPLY VOLTAGE = 11.6 + 0.022 (CABLE LENGTH x 0.07) VDC

For internal only protector (standard with 4-20mA output):

MINIMUM SUPPLY VOLTAGE = 11 + 0.022 (CABLE LENGTH x 0.07) VDC

Environmental

Protection Rating IP68

Operating Temp. -10...60° C

Compensated Temp. -10...80° C

Wetted Materials 316 L Stainless Steel

Titanum Optional

Polyamide

Cable & Sealing PE & EPDM for water / wastewater

Hytrel & Viton for hydrocarbons

Tefzel & Viton or EPDM as required for

chemical interaction

7. NSF 61 and NSF 372 approval applies to both 316L stainless steel & titanium construction with PE

& EPDM cable sealing option, which is standard on this instrument unless otherwise specied.

Optional Accessories

1/2” NPT Conduit Fitting Drying Tube Assembly Bellows Assembly Cable Hanger Termination Enclosure Pressure Test Adapter

Stabilizing Weight Interface Converter Process Meter Open-faced Nose Cap Signal Line Surge Protector