Thermo Scientific 7451 Operating And Maintenance Manual page 51

Section 6
Specifications
6-2 Controlled Rate Freezer
Uniformity Profile
1) Hold 10.0min @25C
2) 2.0C/min C to 0.0C
3) 0.0C/min S to 3.0C
4) Hold 10.0min @1.0C
5) 1.0C/min C to -5.0C
6) 99C/min C to -50C
7) 99C/min C to -10.0C
8) 1.0C/min C to -2.0C
9) Hold 12.0 min @ -2.0C
10) 1.0C/min C to -20C
11) END
Chamber Temperature Range
+50°C to -180°C
Chamber Freezing Rate
Minimum 0.1°C / min
Maximum 99.9°C / min over operating temperature range
Note Rates vary based on load, LN
Chamber Warming Rate
Minimum of 0.1°C / min (no load, T-couple in free air, center of
chamber)
Maximum of 12.0°C / min (same conditions as above)
Average of 9.0°C / min (same conditions as above, range -40°C to -12°C)
Note Rates vary based on load, LN
Weight
Model
7450
7451
7452
7453
7454
7455
7456
7457
7458
7459
7472
7473
7474
7475
7476
pressure, unit size, and voltage.
2
pressure, unit size, and voltage.
2
lbs. (kg)
140 (63.5 )
140 (63.5)
160 (72.6)
160 (72.6)
180 (81.6)
180 (81.6)
140 (63.5)
140 (63.5)
160 (72.6)
160 (72.6)
140 (63.5)
160 (72.6)
180 (81.6)
140 (63.5)
160 (72.6)
s
s
Thermo Scientific