Dwyer MBLT - Manual

The MBLT Miniature Submersible Level Transmitter is only 0.63˝ in
diameter making it ideal for level monitoring in well and borehole appli-
cations. Constructed for years of trouble free service, the MBLT has a
welded 316 SS body and 316 SS nose cap. Body top is also 316 SS and
tapered to prevent damage or snares when pulling the unit out of the
installation. Featured in the MBLT is a precision ±0.10% or ±0.25% of full
scale accuracy output, better than BFSL or BSL rated outputs used by
most competitors. Lightning and surge protection (not guaranteed or cov-
ered by standard warranty) is included standard to stand up in harsh
applications. MBLT comes with a choice of polyether polyurethane or
ETFE cable materials and all are vented for barometric pressure com-
pensation. Vent is covered with a maintenance-free filter preventing par-
ticulate or water droplets from entering the transmitter.
APPLICATIONS
• Ballast tanks; Ground water monitoring; Surface water monitoring;
Dewatering;
Down hole; Remediation and other environmental monitoring applica-
tions.
ELECTRICAL INSTALLATION
An external power supply delivering 10 to 33 VDC with minimum current
capability of 40 mA DC (per transmitter) is required to power the control
loop. See figure below for connection of the power supply, transmitter
and receiver.
The maximum receiver load resistance (RLmax) for the DC power sup-
ply voltage (Vsup) is expressed by the formula:
RLmax = Vsup – 10V
0.02A
Shielded cable is recommended for control loop wiring.
Series MBLT Miniature Submersible Level Transmitter
Specifications - Installation and Operating Instructions
Bulletin L-MBLT
SPECIFICATIONS
Service: Compatible liquids.
Wetted Materials:
Body and nose: 316 SS;
Cable: Polyether polyurethane or ETFE;
Seals: Fluoroelastomer;
Label: Polyethylene polyamid.
Accuracy: ±0.25% or ±0.10% of FS.
Temperature Limits: -4 to 176°F (-20 to 80°C).
Compensated Temperature Limits: 0.25%: (0 to 70°C); 0.10%: (0 to
60°C).
Thermal Effect: 0.25%: ±0.45% FS TEB; 0.10%: ±0.30% FS TEB.
Pressure Limit: 2x FS.
Power Requirements: 10 to 33 VDC.
Output Signal: 4 to 20 mA DC 2-wire.
Response Time: < 50 ms.
Max Loop Resistance: 1000 Ω @ 30 VDC.
Electrical Connections: Wire pigtail.
Mounting Connection: Suspended below point being monitored.
Electrical Protection: Surge/lightning protected per EN61000-4-5,
Class 5.
Weight:
Body: 0.235 lb (0.107 kg);
Cable: 0.037 lb (0.009 kg) per foot.
Agency Approval: CE.
MERCOID DIVISION
DWYER INSTRUMENTS, INC.
P.O. BOX 258 • MICHIGAN CITY, IN 46361 U.S.A.
Phone: 219/879-8000 www.dwyer-inst.com
Fax: 219/872-9057 e-mail: [email protected]
6-1/4
[158.30]
Ш5/8
[Ш15.87]
SUBMERSIBLE
CABLE
BREATHER
TUBE
RECEIVER
PRESSURE
TRANSMITTER
RED
BLACK
SHIELD
POWER
SUPPLY
10-33 VDC