Dwyer 3100MP - Manual (Page 7)

Page 6
4. After completing the test and being very careful not to touch
exposed conductors. Disconnect the insulation tester and connect
a 100kW resistor between the grounding terminal and the short-
circuiting SUPPLY terminals. Leave this resistor connected at
least three seconds to discharge any static potential. Do not touch
the terminal while it is discharging.
Dielectric Strength Test
1. Short-circuit the + and - SUPPLY terminals in the terminal box.
2. Turn off the dielectric strength tester. Then connect the tester
between the shorted SUPPLY terminal and the grounding
terminal. Be sure to connect the grounding lead of the dielectric
strength tester to the ground terminal.
3. Set the current limit on the dielectric strength tester to 10 mA, then
turn on the power and gradually increase the tester voltage from
'0' to the specified voltage.
4. When the specified voltage is reached, hold it for one minute.
5. After completing this test, slowly decrease the voltage to
avoid any voltage surges.
2.10 Explosion-Proof Rating
2-10-1. FM Certification
HAZARDOUS LOCATION ELECTRICAL EQUIPMENT
Equipment Rating: Explosion-Proof for use in Class I, Division 1,
Groups A, B, C and D;
Dust- Ignition-Proof for Class II/III, Division 1, Groups E, F and G;
Nonincensive for use in Class I, Division 2, Groups A, B, C and D;
Suitable for use in Class II, Division 2, Groups E, F and G;
and Suitable for Class III, Division 1;
Hazardous (classified) location, indoor and outdoor
(NEMA Type 4X/IP67).
2.10.2 DEKRA/ATEX Certification
ATEX Certification number : DEKRA 11ATEX0192X
CE 0344 II 2 G
Model 3100 for potentially explosive
atmosphere
1. Ex d IIC T6...T4
2. Operating Temperature : -20°C ≤ T
amb
≤ +60°C
3. T6 for process ≤ 85°C;
4. T5 for process ≤ 100°C;
5. T4 for process ≤ 130°C;
Electrical Data
1. Supply Voltage : 42 Vdc Max
2. Output Signal : 4 to 20 mA + HART
Electrical Connection : 2 x 1/2-14 NPT Female
3100 ATEX Certification is according to the
below standards
EN 60079-0 : 2006
EN 60079-1 : 2007
Installation
1. All wiring shall comply with local installation requirement.
2. The cable glands and blanking elements shall be of a certified
flameproof type, suitable for the condition of use and correctly
installed. Also those devices should be endured at the 130°C.
3. Housing Ground must be followed to “local electrical codes”. The
most efficient ground procedure is to connect directly to the earth
as least impedance.
1. How to Housing Ground:
A. Internal Ground Connection:
Internal ground connection screw is located in terminal in
housing; the screw can be identified as ground sign.
B. External Ground Assembly:
This is located in the right side of housing and identified as
ground sign. (Grounding with a cable lug)
2. When use tubing, stopping boxes must be connected with the wall
of housing directly.
3. Tubing is installed a minimum of 5 threads.
4. Sensor is to be threaded a minimum of 7 threads and prevented
from turing by tightening the housing rotation set screw.
5. Do not disassemble flameproof Joints but in an unavoidable case
to disassemble it or need the specification of flameproof Joints,
contact the manufacturer before doing.
Operation
1. Take care not to generate mechanical spark when access to the
instrument and peripheral devices in hazardous location.
2.11 EMC Conformity Standards
EMI (Emission): EN55011
EMS (Immunity): EN50082-2
Dwyer Instruments, Inc. recommends customer use metal conduit
wiring or twisted pair shield cable for signal wiring to conform with
EMC regulation, when installing the Mercoid
® 3100 transmitters.
Chapter 3 Transmitter Functions
3.1 Overview
This Chapter contains information on operating the Model 3100.
Tasks that should be performed on the bench prior to installation are
explained in this chapter.
3.2 Safety Messages
Procedures and instructions in this chapter may require special
precautions to ensure the safety of the personnel performing the
operations. Potential safety issues are indicated by a warning
symbol (
). Refer to the following safety messages before
performing an operation preceded by this symbol.
3.3 Warning
3.4 Fail Mode Alarm
Mercoid
® Smart Pressure Transmitter automatically and
continuously performs self-diagnostic test. If the self-diagnostic test
detects a failure, the transmitter drives the output outside of the
normal operation values. The transmitter will drive its output low
(down) or high (up) based on the position of the failure mode alarm
jumper. See Table 3.1 for output values.
[Table 3.1 Standard Alarm and Saturation Values]
Level
Low/Down
High/Up 4~20 mA Saturation
3.9 mA
20.8 mA 4~20 mA Alarm
≤ 3.75 mA
≥ 21.75 mA
Explosion can result in death or serious injury:
Do not remove the transmitter covers in explosion environments
when the circuit is powered. Transmitter covers must be fully engaged to meet
explosion-proof requirements.
DANGER
Electrical shock can result in serious injury:
Only qualified personnel can install the transmitter.
WARNING
NOTICE
NOTICE
NOTICE
NOTICE
NOTICE
NOTICE
DO NOT OPEN WHEN AN EXPLOSIVE
ATMOSPHERE MAY BE PRESENT. WARNING
Maintenance and Repair
The instrument modification or parts replacement by other than
authorized representative of Dwyer/Mercoid is prohobited and will void KEMA/ATEX
explosion-proof/flame-proof.
NOTICE