Series |
N/A 868-D/P Sensor Control (Air Flow Control) |
Type |
N/A Sensor Control Level Transmitter |
Range of Adjustment |
N/A 0 to 83 inH2O through 0 to 138 inH2O, 0 to 2.1 mH2O 0 to 3.5 mH2O |
Note for Span Adjustment Range |
N/A IMPORTANT! Accuracy, linearity, and non-repeatability values are based on nominal range. |
Temperature [Min] |
N/A -18 ºC0 ºF |
Temperature [Max] |
N/A 82 ºC180 ºF |
| Combined Accuracy1 | N/A ± 0.34% Full Scale |
Fittings |
N/A None, 1/4 in. National Pipe Thread (NPT) |
Accuracy |
N/A ± 0.2% Full Scale (± 0.10% Full Scale, Typical) Includes Non-Linearity, Hysteresis and Non-Repeatability |
Thermal Effects (Over Compensated Temperature Range) |
N/A
Less than 0.007% ºF (0.011% ºC) Span Shift - Sensitivity Less than 0.007% ºF (0.011% ºC) Span Shift - Zero |
Depth Measurement [Max] |
N/A 1,937 inH2O49.0 mH2O |
Power Supply Stability (Effect on Free-Space Optical Communication (FSO)) |
N/A Less than 0.005% of Span Change in Output Per Volt Change at Input Terminals |
Output Signal (Milliampere Direct Current (DC) (mAdc)) |
N/A 4 to 20 mA |
Direct Current (DC) Power Supply Voltage (Unregulated) |
N/A 14 to 40 V |
Repeatability |
N/A ± 0.20% of Calibrated Span |
Voltage/Load Capacity Ratings |
N/A The KING-GAGE® D/P Transmitter requires a source of DC power for operation. The minimum excitation voltage necessary for the transmitter is 10 Vdc. Any receiving components (meters, data recorders, programmable controllers, etc.) installed in the process loop circuit must be taken into account when determining the required power supply voltage. The internal resistance of each device added together represents the total "load" residing on the circuit loop. |
Nominal Span Adjustment Range |
N/A 0 to 5 psid |
Span Adjustment Range [Min] |
N/A 0 to 3 psid |
Burst Pressure |
N/A 200 psi |
Pressure Range |
N/A 0 to 5 psid |
Compressed Air Requirement |
N/A 35 psid to 150 psig Supply Pressure at Control Inlet |
Operating Limit (Maximum Pressure) |
N/A Pressure above 300% nominal range (overrange) will result in damage to the transmitter (200% may cause a shift in calibration). Burst pressure is 200 psi and will cause catastrophic and physical failure of the pressure element. |
Pressure to Milliampere (mA) Conversion |
N/A
KING-GAGE® D/P Transmitters accept either gage or differential pressure pneumatic inputs that are converted to a proportional 4-20 mA output signal. This two wire signal loop is compatible with typical process components that accept analog input including PLCs. Designed to operate over a broad voltage range, these transmitters work with power sources ranging from 14-40 Vdc (based on load requirements). Output current limiting and continuous no-load operation ensures reliability in even the most demanding situations. Isolated test meter terminals permit in-process monitoring for troubleshooting. This allows the user to easily check the transmitter output without having to remove it from the process loop circuit. |
Pressure Ranges are Span Adjustable |
N/A Transmitter span accommodates a 3:1 turndown ratio (3:1 turndown ratio is applicable to 0-10 and 0-30 nominal range, refer to specifications for detailed span adjustment available on specific range models.) to match the application pressure range (i.e., tank depth). This permits ranging of the device to provide full scale output for maximum resolution in process control operations. Individual transmitter ranges of 0-5 through 0-50 psid are offered. These yield far greater stability than comparable single range units requiring high turndown ratios to fit the application. |
Service and Replacement Parts |
N/A
7333-10: Replacement filter element 7334-2: SafeGard service kit 7334-9: Air control section kit 7879-20: Vent generator 9316-4: O-ring for D/P top plate (868) |
Differential Pressure Pneumatic Sensor Controls |
N/A
The KING-GAGE® D/P Transmitter is also offered in a hybrid version combined with an air flow control for pneumatic sensors or downpipe (bubbler) systems. These combination units allow for direct 4-20 mA signal from the tank using the integrated differential pressure transmitter. D/P Sensor Controls are designed for use with KING-GAGE® pneumatic diaphragm sensors. The air control portion of these units creates a 1:1 pneumatic pressure directly proportional to liquid depth in the tank. Acting as a force balance, the pneumatic pressure offsets the hydrostatic pressure exerted against a diaphragm at the tank. The electronic transmitter then converts this pressure into a 4-20 mA output signal. D/P LiquiSeal Controls and D/P Purge Controls are used in conjunction with a downpipe (or bubble tube) extending down through the liquid contents of the tank. This type of sensor also acts as a force balance. A continuous purge of compressed air into the pipe displaces the liquid and creates a pneumatic pressure equivalent to hydrostatic head pressure. The transmitter converts this pressure into a 4-20 mA output signal. |
Transmitter Signal Loop |
N/A
As is typical of two wire transmitters, electrical power to the signal loop is supplied through twisted pair cable. Excitation voltage (+V) is provided by the receiving device or from a separate Vdc power supply installed in the loop. The actual voltage necessary for operation of the system will depend upon the overall load resistance of the loop. In most applications, the KING-GAGE® Digital Indicator or LevelBAR indicator provides 24 Vdc excitation to power the transmitter signal loop. |
Application |
N/A
|
Tank Gauging Applications |
N/A
Acting on the force balance principle, a pneumatic sensor generates air pressure equivalent to the hydrostatic force created by liquid depth. This pneumatic pressure is directed into the D/P transmitter. Pressure is converted to an electronic 4-20 mAdc output proportional to liquid depth. Twisted pair cabling is used to form the signal loop through which the remote indicator receives the transmitter output. The KING-GAGE® indicators shown in these system views correlate the transmitter output to total volume or weight of tank contents. This is determined by using a pressure versus capacity listing corresponding to the actual tank dimensions. |
Additional Information |
N/A
|
Product Warranty |
N/A
All KING-GAGE®, a NOSHOK Company products are guaranteed to be free from defects in material and workmanship for one (1) year from the date of purchase. Repair Services Warranty: 90 days limited warranty. |
Prop 65 Warnings |
N/A
 WARNING: This product can expose you to chemicals including Lead and Nickel, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov |
