HPEOK ultrasonic Liquid level transmitter

Product Introduction

UYB liquid level transmitters are used to measure the liquid level in refrigerant vessels. UYB transmits an active 4-20 mA signal which is proportional to the refrigerant liquid level. The 4-20 mA signal from UYB can be used in conjunction with a controller to control the refrigerant liquid level. The Danfoss EKC 347 liquid level controller, is a dedicated controller for use with the UYB.

Special features

1.”Plug and Play”: no calibration required.

2.Service friendly: electronic head and sensor tube can be separated   

without emptying the standpipe.

3.Damping of output signal available.

4. Improved calibration: UYB range/signal output can be adapted to suit

the actual application.

Technical data

1.     UYB supports the following refrigerants: R717 ,R22 ,R404A ,R134a, R410a ,R744 ,R718 (H 2O)

2.     Length range: 100 – 2500 mm

3.     Temperature range: –100/+200° C

4.     Pressure range: UYB is designed for: Max. working pressure: 63 bar

5.     Connection: Pipe thread ISO 228/1 - G 1A

6.     Ambient temperature: During operation: –25 to +55°C (–13/+131°F).

During transport:  –40 to +70°C (–40/+158°F).

7.     Signal output: 4-20 mA

8.     Supply voltage and load: 24 V d.c, ±10% 1.5 W

9.     Enclosure: IP65

10.  Connection: 4-pole plug (DIN 43650)

11.  Max. load resistance: 500 ohm

12.  Accuracy : ≤ ±1.0% FS

13.  repeatability: ≤ ±0.5% FS

14.  Material:

Thread: Stainless steel. AISI 304

Reference pipe: Stainless steel. AISI 304

Inner electrode: PTFE

Design

Electronic head and sensor tube can be separated without emptying the standpipe. Plug can be mounted in 4 different positions.
Function and factory setting

The rod consists of two pipes - an inner pipe and an outer pipe. The liquid will flow up between the two pipes and by measuring the electrical capacitance between the pipes, the length of rod immersed in the liquid refrigerant is registered. The signal is transmitted as a current signal from 4 to 20 mA (4 mA when the rod does not register liquid - and 20 mA when the entire rod is surrounded by liquid).

Factory setting:
The rod comes factory calibrated for R134a ), so that it will cover 4 to 20 mA throughout the rod’ s whole measuring range. Any disturbances in connection with the level measurement will be damped internally.

R1 34a / R41 0a

It is not necessary to change the settings. The factory setting can be used.
NOTE!
If an alternative refrigerant other than the listed is used, a new Min/ma calibration of the level transmitter is required.

Setting of refrigerant

The setting may be carried out before the level transmitter is mounted on the plant.

Technic Parameter