Murphy 45TEBP, SPLC, SPLG, SPLBP warranty Sensing BULB-THERMOWELL Installation, Detail a, Detail B

SENSING BULB-THERMOWELL INSTALLATION

Precautions

Cutting or sharp bending the capillary will cause permanent damage			SWICHGAGE®
to the SWICHGAGE® and will void the warranty. Excess capillary			100	500
should be carefully coiled and secured away from damage. Do not			0	800
route capillary along exhaust manifold. Avoid routing capillary at a
level higher than gage mounting.
Installing Sensing Bulb	transmitting
1. Install the 1/2 NPT adapter into the
	tube or
application.	capillary
		compression
2. Slip compression nut and ferrule
	Adapter	nut
onto bulb.

3. Insert the sensing bulb directly
through the adapter and fully	Sensing	Wall
immerse it into the process without	bulb
interference. Be sure to leave enough of	insertion
the bulb to allow the compression nut and
ferrule to be tightened.

4.Keep the bulbs active section in the middle of the process flow.

5.Tighten the compression nut and ferrule. This will keep the bulb in place and obtain a full seal.

6 in.

active (152 mm) section of

sensing bulb

Installing Thermowell Thermowell is recommended for high pressure applications or corrosive environments. It also allows tempera- ture sensor to be changed or adjusted without opening connection to process.

1.First screw the thermowell into the process (pipe line).

2.Pass the sensing bulb through the nut and ferrule.

3.Fully insert the sensing bulb into the thermowell housing and secure it with the compression nut.

NOTE: The use of temperature trans- mitter grease or silicon grease on the tip of the sensing bulb is recommended to facilitate heat transfer to sensing bulb junction.

LIMIT CONTACTS / INDICATION POINTER ADJUSTMENTS

Limit Contact Adjustments

Facing the dial, left side knob is “Low limit” contact. Right side is “High limit” contact.

Indication Pointer Adjustments To reset to zero or to a known value proceed as follows:

DETAIL “A”

Turn to lower

NOTE: the 45TE Series features a stacked limit indicator knob with both limit adjust- ments included. The bottom half knob adjusts the “Low” limit indicator, the top half is to adjust the “High” limit indicator.

To set limit contact, turn the knob to the desired point on the scale.

A. Contact arm-flexB. Contact arm C. Pointer Contact

D. Initial point of contact E. Limit contact knob

E

A D

1.Turn off power. Remove the snap ring and the lens/contact assembly (or open hinged cover).

2.Hold the pointer hub with thumb and forefinger then turn screw to desired point. Avoid touching the gold flashed, silver contact areas.

See DETAIL “A”.

pointer

Turn to raise pointer

Limit Contact

Wiping Feature (SPL)

The force of pointer causes the	B
flexible contact arm (A) to “tilt”	C
resulting in a wiping action (D).
This clears away film or
corrosion formed on the
contact surfaces.

B

A

C D

For the 45TE Series see DETAIL“B”.

3.Replace lens contact assembly and snap ring (or close hinged cover), and turn on power.

NOTE: Span adjustments and recalibration must be performed by an authorized mechanic or return the unit to Frank W. Murphy Mfr.

DETAIL “B”

Turn to raise pointer

Turn to

lower pointer

OPERATION TEST INSTRUCTIONS

SPLC and SPLFC Series

1.Perform operation test after the unit is installed and wired appro- priately (see Typical Electrical Diagrams on page 4).

2.When temperature is applied to the sensing bulb the pointer will trav- el in a clockwise direction. (Adjust contacts to desired set points.)

3.Place the toggle switch (SPLC Series only) in the “start”position or otherwise override low contact. After the indication pointer rises past the low limit contact, return the toggle switch to the “run”position.

4.To test the limit contacts, turn the limit contact to be tested until it touches the pointer. That will trip the control circuit.

5.Reset the shutdown or alarm circuit device.

45TE Series

1.Perform steps 1 and 2 in the SPLC Operation Test Instructions.

2.To test the switches, turn the limit indicator until it touches the pointer, then continue to rotate until the snap-switch operates*.

3.Reset the shutdown or alarm circuit device.

*The trip point indicator will stop the pointer movement slightly before the snap-switch operates. As temperature continues to increase or decrease, the trip point setting is reached.

SPL-92106N page 3 of 4