LumaSense Technologies M67 User Manual
Page 23
M67, M67S Manual
22
Figure 15 - Protective Jacket With Screw On End Cover
7.4 PROTECTIVE JACKET WITH OPTIONAL COOLING CAPABILITY
The coolant may be connected to the INFRADUCER jacket using a 1/4" O.D. tubing. Connections are made using two 1/8"
NPT x 1/4" O.D. tube fittings. See Figure 16. (If /XPD6HQVH’s type “N” Air Purge Assembly is included, see Figure 17).
The coolant may be tap water or, preferably, recycled water suitably treated to prevent corrosion. Diethylene glycol based anti-
freeze may also be used in a closed circuit cooling system.
The following table shows the minimum coolant circulation rate for a supply temperature of 60°F (20°C).
MINIMUM COOLANT CIRCULATION RATE
Ambient Temperature
Coolant Circulation
°F
°C
Gal/hr
Liters/hr
150
65
0.2
0.8
200
95
0.6
2.3
250
100
1.0
3.8
300
150
2.0
7.6
350
175
3.0
11.4
400
205
4.0
15.2
450
230
6.0
22.7
500
260
10.0
37.8
CAUTION
Coolant supply temperature must be above dew point of the air around the INFRADUCER to avoid
erroneous readings.
A major advantage of the protective/cooling jacket is that, once installed, it permits the rapid removable and replacement of the
INFRADUCER without disturbing the alignment on the target. Removal and replacement can be done in less than one minute.
Electrical wiring connection and return to service can be accomplished within 2 to 5 minutes. (Note the warning regarding
method of removal shown in Figure 16).
CAUTION
For low temperature range start-ups, please observe the precautions listed in Section 10.1, page 35.