Fluke 7312, Руководство пользователя

Страница: 39 / 77

other conditions. We assume the bath is well covered at this point. This is also
subject to company policy.
Flash Point: The point at which ignition may occur. The point shown may be
either the open or closed cup flash point. Refer to the flash point discussion in
Section 9.1.8, Safety.
Boiling Point: At or near the boiling point of the fluid the temperature stability
is difficult to maintain. Fuming or evaporation is excessive. Large amounts of
heater power may be required because of the heat of vaporization.
7312 TPW Maintenance Bath
User’s Guide
36
Fluid
(# = Hart Part No.)
Lower
Temperature
Limit* Upper
Temperature
Limit*
Flash
Point Viscosity
(centistokes) Specific
Gravity Specific Heat
(cal/g/°C)
Thermal
Conductivity
(cal/s/cm/°C) Thermal
Expansion
(cm/cm/°C)
Resistivity
(10
12
-cm )
Halocarbon 0.8
#5019 –100°C (v)** 70°C (e) NONE 5.7 @ –50°C
0.8 @ 40°C
0.5 @ 70°C 1.71 @ 40°C 0.2 0.0004 0.0011
Methanol –96°C (fr) 10°C (fl,cc) 12°C 1.3 @ –35°C
0.66 @ 0°C
0.45 @ 20°C 0.810 @ 0°C
0.792 @ 20°C 0.6 0.0005 @ 20°C 0.0014 @ 25°C
Water 0°C (fr) 95°C (b) NONE 1 @ 25°C
0.4 @ 75°C 1.00 1.00 0.0014 0.0002 @ 25°C
Ethylene
Glycol—50% #5020 –30°C (fr) 90°C (b) NONE 7 @ 0°C
2 @ 50°C
0.7 @ 100°C 1.05 0.8 @ 0°C 0.001
Mineral Oil No.7
#5011 10°C (v) 166°C (fl) 168°C 15 @ 75°C
5 @ 125°C 0.87 @ 25°C
0.84 @ 75°C
0.81 @ 125°C 0.48 @ 25°C
0.53 @ 75°C
0.57 @ 125°C 0.00025 @ 25°C 0.0007 @ 50°C 5 @ 25°C
Silicone Oil Type
200.05 #5010 –40°C (v)** 130°C (fl, cc) 133°C 5 @ 25°C 0.92 @ 25°C 0.4 0.00028 @ 25°C 0.00105 1000 @ 25°C
10 @ 150°C
Silicone Oil Type
200.10 #5012 –30°C (v)** 209°C (fl, cc) 211°C 10 @ 25°C
3 @ 135°C 0.934 @ 25°C 0.43 @ 40°C
0.45 @ 100°C
0.482 @ 200°C 0.00032 @ 25°C 0.00108 1000 @ 25°C
50 @ 150°C
Silicone Oil Type
200.20 #5013 10°C (v) 230°C (fl, cc) 232°C 20 @ 25°C 0.949 @ 25°C 0.370 @ 40°C
0.393 @ 100°C
0.420 @ 200°C 0.00034 @ 25°C 0.00107 1000 @ 25°C
50 @ 150°C
Silicone Oil Type
200.50 #5014 30°C (v) 278°C (fl, cc) 280°C 50 @ 25°C 0.96 @ 25°C 0.4 0.00037 @ 25°C 0.00104 1000 @ 25°C
50 @ 150°C
Silicone Oil Type
550 #5016 70°C (v) 230°C (fl, cc)
300°C (fl, oc) 232°C 50 @ 70°C
10 @ 104°C 1.07 @ 25°C 0.358 @ 40°C
0.386 @ 100°C
0.433 @ 200°C 0.00035 @ 25°C 0.00075 100 @ 25°C
1 @ 150°C
Silicone Oil Type
710 #5017 80°C (v) 300°C (fl, oc) 302°C 50 @ 80°C
7 @ 204°C 1.11 @ 25°C 0.363 @ 40°C
0.454 @ 100°C
0.505 @ 200°C 0.00035 @ 25°C 0.00077 100 @ 25°C
1 @ 150°C
Silicone Oil Type
210-H 66°C (v) 313°C (fl, oc) 315°C 50 @ 66°C
14 @ 204°C 0.96 @ 25°C 0.34 @ 100°C 0.0003 0.00095 100 @ 25°C
1 @ 150°C
Heat Transfer Salt
#5001 180°C (fr) 550°C NONE 34 @ 150°C
6.5 @ 300°C
2.4 @ 500°C 2.0 @ 150°C
1.9 @ 300°C
1.7 @ 500°C 0.33 0.0014 0.00041 1.7
Ω
/cm
3
*Limiting Factors — b - boiling point e - high evaporation fl - flash point fr - freeze point v - viscosity — Flash point test oc = open cup cc = closed cup
**Very low water solubility, ice will form as a slush from condensation below freezing.
Table 2 Table of Various Bath Fluids and Their Properties