Omega OS137 manual Ambient Temperature, Atmospheric Quality

Operation 3

3.2 – Ambient Temperature

The transmitter can operate in an ambient temperature of 0 to 70°C (32 to 158°F) without any water cool jacket. It can operate from 0 to 200°C (32 to 392°F) with the water cool jacket accessory, OS137-WC (Fig 3-6 & 3-7). It can operate up to 110°C (230°F) with air cooling.

There is a warm up period of 1 to 2 minutes after power up. After the warm up period, temperature measurement can be made.

When the ambient temperature around the transmitter changes abruptly, the sensor head goes through a thermal shock. It takes a certain amount of time for the sensor head to get stabilized to the new ambient temperature. For example, it takes about 30 minutes for the transmitter to stabilize from the 25°C to 50°C (77°F to 122°F) ambient temperature.

3.3 - Atmospheric Quality

Environments with smoke, dust, and fumes dirty up the optical lens, and cause erroneous temperature readings. To keep the surface of the optical lens clean, the air purge collar accessory is recommended, OS137-AP (Fig 3-4).

The following figures show the Mounting Bracket (OS137-MB), Air Purge Collar (OS137-AP), Stainless Steel Housing and Water/Air Cool Jacket (OS137-WC), with built-in air purge collar.

57.2	4.3 (0.170) DIA.
28.6(2.25)
(1.125)	12.7
15.2
	(0.50)
(0.6)
4.3		3.2
(0.170)	17.4
		(1/8)
INSERT	(0.687)
		95.3
OS137 HEAD
INTO THE HOLE		(3.75)
19.8
(0.78)

17.4
(0.686)	90
98.8
(3.89)

96.5

(3.80)

DIMENSIONS mm (in)

53.3

(2.10)

32.5

(1.28)

25.4

(1.0)

50.8

(2.0)

25.9 (1.020) DIA.

90

3.2

(1/8)

Figure 3-3. Mounting Bracket, OS137-MB

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