Hengesbach Pressure and Level Transmitter PZM/VRM 200/201

 

The digital pressure and level transmitters PIEZOMESS PZM / VARIMESS VRM - Series 200, with their O-ring seals, are suitable for pressure and level measurements without dead spaces, under strict cleanliness conditions, as well as for viscous and crystallising media. They have a modular, flush-mounted connection concept with various adaptors. 

The PIEZOMESS PZM / VARIMESS VRM - Series 100 consists of one basic device, which can be combined with various application-specific adaptors, e.g. welding sockets, DRD, VARIVENT, DIN 11851, Clamp, Flange DIN, etc. In combination with the advantages of digital electronics, e.g. a large measuring range and on-site adjustability, this concept results in clearly reduced storage space and spare parts and thus to a cost reduction in materials administration. During operation, various pressure units can be shown on the local display (OPUS), along with the sensor temperature as a secondary process indicator. The display and operating module has either been integrated into the field housing or is available as an external housing with a plug connection. 

Features:

• High precision ≤ ± 0,05% FS, turn down 10, vacuum safe
• Further scope of functions thanks to programmability
• Optional with HART^® protocol
• Tank linearisation for standard tank shapes and special designs thanks to volumetric measurement with OPUSi
• Diagnosis function for monitoring of devices
• Copying of device parameters with easy transfer
• Integrated on-site display or external OPUSi display and operating module for parametrisation and display of measuring values
• Application strenght: highly precise measurement of content pressurised tanks / vacuum measurements with high temperatures
• EHEDG-aseptic certified modular process connection system

Specification:

General details
Device type / measuring principle	PZM 200/201/200H/201H: piezoresistive
	VRM 200/201/200H/201H: capacitive
Input
Measuring ranges		PZM 200/201/200H/201H
Standard nominal measuring ranges [bar]	relative	OP	absolute	OP
OP = overload protection [bar]	-1/0...0.35	1
	-1/0...1	3	0...1	3
	-1/0...2.5	8	0...2.5	8
Special measuring ranges	-1/0...5	15	0...5	15
	-1/0...10	30	0...10	30
All measuring cells are vacuum-proof
	-1/0...30	90	0...30
	-1/0...100	250	0...100
Setting the measuring ranges	Via the keypad of the OPUSi display and operating module / via the integrated on-site display
	Optional: via HART® (for the range of functions see the operating instructions)
Setting ranges	Start the measuring zero:	0...90%	of the sensor's nominal measuring span	TD=10
	Measuring span span:	10...100%	of the sensor's nominal measuring span
Burst pressure DIN16086	≥ 4-fold measuring range
Output
Output signal	2-wire:   4...20mA with a test circuit connection in the device
	Optional: 4...20mA HART®
Fault signal	Optional: 3.8mA, 22mA, hold (i.e. holding the last value)
Current limitation	3.85mA and 21.5mA (normal operation)
Integration time	Continuously selectable between 0 and 300s (setting time after a pressure leap)
Measuring accuracy
Reference conditions	acc. to DIN IEC 770
Linearity, hysteresis and repeata bility as per the limit point method DIN IEC 770	≤ ± 0.05% of the sensor's nominal measuring range
Activation time	< 5s (the device will carry out a self-test.)
Setting time (without damping)	< 200ms
Long-time drift	≤ 0.2% of the span per year
Thermal hysteresis	≤ ± 0.75% beginning of the measuring range / ≤ ± 0.8% end of the measuring range (VRM)
≤ ± 0.2% of the sensor's nominal measuring range / 10K (-20 to +80°C) from 4bar (PZM)
≤ ± 0.3% of the sensor's nominal measuring range / 10K (-20 to +80°C) up to 0.6bar (PZM)
Conditions of use
Installation position / calibration position	Any position / standing vertically
Medium temperature	PZM:	T1:	-40...+125°C (140°C over one hour at the most)
		T2:	-40...+200°C (high-temperature version)
	VRM:		-40...+140°C
Ambient storage temperature	Type 201/201H:	-40...+85°C
	Type 200/200H:	-30...+75°C
	(Below -20°C cable breakage might occur and the display's function may be impaired.)
Protection class acc. to EN60529	IP 67 and IP 69K
Electromagnetic compatibility	Sensitivity against interference:	acc. to DIN IEC 61000-6-2
	Interference radiation:	acc. to DIN IEC 61000-6-4

Download Data Sheet: Pressure and Level Transmitter PZM/VRM 200/201

Ref: hengesbach.com