Omega Vehicle Security A, B instruction sheet

Model A and B

Dialtemp™ Dial Thermometers

INSTRUCTION

SHEET M0055/0702

100

150

200

250 300

350

400

450

500

°F

INSTALLING THE THERMOMETER

Model Aand B Dial Thermometers are supplied

standard with a 1⁄2" NPT hex mounting nut.

Carefully screw the thermometer into the fitting

by hand until slightly tight. Complete tightening

using a 7⁄8" wrench on the hex nut. (See Figure

1). When using a thermowell, tighten only

FINGER TIGHT. CAUTION: NEVER TIGHTEN

BYTWISTING THE HEAD! To obtain a positive

seal, coat threads with pipe joint compound, or

use Teflon®tape.

When inserting Dialtemp™ Dial Thermometers

into semi-solid materials, hold stem firmly and

insert slowly and carefully to avoid bending. Do

not hold thermometer by the head when

inserting into a material, always hold by the

stem.

A1⁄4" NPT mounting nut, 3⁄4" NPT Adapter

bushing and plain hex bushing (with no

threads) are also available as mounting options

for the Model Aand B Dial Thermometers.

It is not always desirable to permanently mount

Dialtemp™ Thermometers. Clip Hangers (Model

C-10) and Spring Handles (T-27) are available

as a mounting option. They are used for

mounting thermometers on the rim of tanks,

kettles, urns, solder pots, beakers and other

containers. Simply slide the metal clip onto the

⁄

" stem of the thermometer and lower it into the

liquid.

CAUTION: Avoid handling the thermometer

by the stem or bending the stem when

carrying it around.

SILICONE-FILLED THERMOMETERS

OMEGA provides the same features in its

special order silicone-filled thermometers as the

standard 3" and 5" styles. They are offered for

severe industrial applications where vibration is

a problem. Silicone is a non-toxic viscous fluid.

Its dampering characteristics prevent wear and

tear on internal parts and improve readability by

reducing flutter.

To specify, add “-SF” to the end of the part

number.

THERMOWELLS

Thermowells should be used whenever the

stem would be exposed to pressure, corrosion,

or shear forces. They also make it possible to

remove the thermometer without losing

pressure or contents.

OPERATING INSTRUCTIONS

For the correct temperature, the stem of the

Dial Thermometer must be immersed at least 2"

in fluids and 4" in gases. An exception to this

rule are thermometers with the ranges of 0-

100°F, 24-125°F, and 0-50°C. These require at

least 31⁄2" in liquid and 5" in gas.

TO RESET THE DIAL

1. Determine the room temperature using a

reference thermometer of known accuracy.

2. Firmly hold the hex mounting nut in the hand

or with a 7⁄8" wrench.

3. While firmly holding the thermometer, slowly

turn the RESET SCREW with a screwdriver

(or 1⁄4" wrench). The dial face INSIDE the

head will rotate as the screw is turned.

Slowly turn the reset screw until the proper

temperature on the dial face is aligned with

the pointer.

.250

Reset Screw

Specify stem length between these points

.69

3.00

.14

.31

.63

Mounting Nut – 1/2" NPT

MODEL A DIMENSIONS

FIGURE 1

SPECIFICATIONS:

ACCURACY: ±1% of full scale

RESPONSE TIME:

Readings are stabilized

within 40 seconds.

RECALIBRATION:

External with 1⁄4" nut reset

screw.

MATERIALS

CONSTRUCTION: Stainless steel welded

construction (rust and

corrosion-proof, leak-proof,

hermetically sealed)

HEAD & BEZEL: Polished Type 302

stainless steel.

MOUNTING NUT: Type 303 stainless steel,

7⁄8" Hex, 1⁄2" HPT

DIALFACE: Anodized aluminum with

raised black marks and

numbers with satin matte

finish background. Easy to

read. Minimum parallax.

STEM: 1⁄4" Dia. 304 Stainless Steel

(highly resistant to

corrosion)

CRYSTAL: Optically clear strong

glass. Unbreakable clear

polycarbonate plastic

crystals are on all silicone-

filled models which are not

recommended for ranges

over 300°F.

DIMENSIONS

HEAD DIAMETER:

Model A; 3" dia.

Model B; 5" dia.

STEM DIAMETER:

1⁄4" dia.

STEM LENGTH: Standard is 9". Also

available: 21⁄2", 4", 6", 12",

15", 18", 24", 30", 36"

(Stems over 36" are also

available, consult Sales

Department for pricing).

Intermediate lengths

available on special order

(allow 5 weeks). NOTE: A

4" stem is the shortest

length for ranges 0-100°F,

25-125°F, and 0-50°C.

POINTED STEMS:

Optional on all models.

They are excellent for

probing asphalt, compost,

soil, frozen foods and

other semi-solid materials.

RESET SCREWS:1⁄4" Hex Nut with slot for

.250

Reset Screw

Specify stem length between these points

.69

5.00

.14

.31

.63

Mounting Nut – 1/2" NPT

MODEL B DIMENSIONS

FIGURE 2

Teflon®is a registered trademark of DuPont.