Dwyer Instruments IEFB Series, Технические характеристики - Инструкция по установке и эксплуатации, Страница: 6 / 40

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GROUNDING
Metallic Pipe
For proper operation, the IEFB must be earth grounded.
1. Connect a ground wire to meter housing via the ground lug on the housing collet.
2. Connect the ground wire to a known earth ground.
a. If the pipe is grounded, connect the ground wire to the pipe using suitable
devices such as grounding clamps.
Non-Metallic Pipes
1. Connect a ground wire to the meter housing per the ground lug on the housing
collet.
2. Connect the ground wire to a known earth ground.
3. Ground the fluid to earth.
POWER SUPPLY
1. Choose a power supply with a voltage and current rating that meets the power
specifications under all operating conditions.
2. If the power supply is unregulated, make sure the output voltage remains within
the required voltage range under all power line conditions.
Figure 17: Non-metalic grounding
Figure 16: Metalic grounding
Figure 14: Thermowell assembly with PG gland
Figure 15: Thermowell assembly with CND gland
GROUNDING
LUG
GROUNDING
RINGS
RTD INSTALLATION
The Series IEFB is provided with a matched pair of temperature sensors. These
temperature sensors must be wired to the IEFB and properly installed into the
accessory thermowells.
Cable Gland (PG 16) Thermowell (refer to Figure 14 below)
1. Remove compression nut (1) by unscrewing from cable gland (2).
2. Remove insert (3) from the cable gland (2).
3. Route the RTD through compression nut (1) and cable gland (2), then into the
insert (3) and washer (4).
Note:
Ensure insert (3) is oriented correctly, as shown in Figure 14 below.
4. Apply a generous coating of provided thermal paste onto the RTD.
5. For best accuracy, firmly insert the RTD into the thermowell, ensuring the tip of
the RTD touches the bottom of the thermowell.
6. Screw the cable gland (2) into the thermowell.
7. Tighten the compression nut (1) onto the cable gland (2) to 30 in/lbs.
Conduit Fitting Thermowell (refer to Figure 15 below)
1. Pull the RTD through the conduit.
2. Push the RTD through the conduit fitting. Route the RTD through compression
nut (1) and conduit fitting (2), then into the insert (3) and washer (4).
3. Apply a generous coating of provided thermal paste onto the RTD.
4. Firmly insert the RTD into the thermowell ensuring the tip of the RTD touches the
bottom of the thermowell.
5. Tighten the conduit fitting into the thermowell to 30 in/lbs.
6. Secure the conduit into the conduit fitting.
2
1
3
4
1. Compression nut
2. Cable gland
3. Insert
4. Washer
1. Compression nut
2. Cable gland
3. Insert
4. Washer
2
1
3
4