描述
The Pall WS18DS is designed to offer reliable measurement of water content in oils in demanding industrial applications. In addition to being able to measure both relative humidity and temperature to highly accurate and precise levels, the WS18DS is also capable of calculating the parts per million (PPM) content of dissolved water in oil.
The Effect of Water in Oil
Water contamination in fluid can cause numerous problems such as additive depletion, oil oxidation, corrosion, reduction of dielectric strength. These costly problems can be averted with continuous monitoring of oil water content so that timely action can be implemented.
Hydraulic, lubrication and insulating fluids, and diesel fuels should be operated without the presence of free water and with dissolved water levels at 50% saturation or considerably of insulating oils.
1. 3.5" TFT Colour Display
- Instrument data can be viewed from the 3.5” colour display and can also be downloaded to external computer for more in-depth data analysis.
- Electronics protected against mechanical damage
- Mounting accessible with closed cover
- IP65 / NEMA4 rated
- 2 analogue outputs current / voltage
- Modbus RTU
- Configurable via display or software
- 2 switch outputs (optional)
- Simple connection to external computer through micro-USB
- Suitable for temperatures up to 180 °C (356 °F)
- Suitable for pressures up to 20 bar (290 psi)
Display
- Shows up to 4 measurands simultaneously
- Display alarms for customer specific limits
- Configure and scale outputs
- Configure Modbus settings
- All measured and calculated values logged continuously
- Logs up to 3 months depending on sampling rate
- Download data via integrated USB port and Pall software
- View all device relevant information in a matter of clicks
Modular Housing
The upper part of the transmitter that encloses the electronics can be separated from the base unit for service or adjustments. The base remains mounted and the cabling intact, even when the unit is being serviced.
A polycarbonate plate on the inside of the housing prevents damage to the electronic board during installation or service.
Specifications
Technical Data
| Measured Values | ||
| Saturation | ||
| % saturation sensor | HC1000-400 | |
| Measuring range | 0 - 100% | |
| Accuracy incl. hysteresis and nonlinearity in air - Standard calibration |
± 2% (0 - 90%S) ± 3% (90 - 100%S) |
|
| Temperature | ||
| Temperature sensor element | Pt1000 (Tolerance class A, DIN EN 60751) | |
| Working range sensing probe | -40 - 180 ºC (-40 - 356 ºF) | |
| Outputs | ||
| Two freely selectable scaleable analogue outputs 0…100% RH / xx…YYºC respectively |
0 -1 /5 /10V | -1mA < IL < 1mA |
| 4 - 20mA | RL < 500 Ohm | |
| 0 - 20mA | RL < 500 Ohm | |
| General | ||
| Supply voltage: | 8 - 35V DC) 12 - 30V AC (optional 100 - 240V AC, 50/60 Hz) |
|
| System requirements for software: | Windows 7 or later; serial interface | |
| Serial interface for configuration: | RS232C | |
| Housing / Protection class: | Polycarbonate / IP65; Nema 4 | |
| Cable gland: | M16 x 1.5 cable® 4.5 - 10mm (0.18 - 0.39”) | |
| Electrical connection: | Screw terminals up to max. 1.5mm2 (AWG 16) | |
| Electromagnetic compatibility | EN61326-1 EN61326-2-3 ICES-003 ClassB Industrial Environment FCC Part15 ClassB |
|
| Display: | Graphical LC display (128 x 32 pixels), with integrated pushbuttons for selecting parameters and MIN/MAX function |
|
| Switching parameters (freely selectable) | %S | % saturation |
| T | Temperature | |
| X | Water content | |
| Options | ||
| Alarm outputs: Integrated Power Supply Module Digital Interface |
2 x 1 switch contact: 250V AC / 6A and 28V DC / 6A threshold + hysteresis can be adjusted with configuration software allows the device to be powered with 100 - 240V AC (50/60Hz) Digital Interface RS485 with Modbus RTU, up to 32 devices in one bus |
|
Dimensions
All dimensions in mm
Type
Use
Ordering Information
Table 1
| Code | Display options |
| Omit | No options |
| R | Relay Alarms |
| M | RS485 / Modbus |
| V | AC Power |
Table 2
| Code | Probe Fitting |
| B08 | ½” NPT thread |
| C08 | ½” ISO thread |
Table 3
| Code | Probe Length |
| Omit | 100 mm (3.9 in) |
| L | 200 mm (7.9 in) |
Table 4
| Code | Cable Length |
| Omit | 2M (6.56 ft) |
| 05 | 5M (16.4 ft) |
| 10 | 10M (32.81 ft) |
Please select only from the following list of standard Water Sensor options:
| WS18DSB08 WS18DSB0805 WS18DSB0810 WS18DSB08L WS18DSB08L05 WS18DSB08L10 |
WS18DSC08 WS18DSC0805 WS18DSC0810 WS18DSC08L WS18DSC08L05 WS18DSC08L10 |
WS18DSRB08 WS18DSRB08L WS18DSRB08 WS18DSRB08L WS18DSVB08 WS18DSVB08L |
WS18DSVB08 WS18DSMB08L WS18DSMB08 WS18DSMB08L WS18DSMB08 WS18DSMB08L |
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