Thermo Scientific 3907 Operating Manual page 54

| Specifications
Chapter 12
Ambient conditions
Ambient Temperature Range
Max. rel. humidity in service at or below 32°C,
non condensing
Storage temperature range
Max. humidity in storage, non condensing
Post-transport acclimation time
Noise level (measuring point: device-distance of
the front side1,0m, height=1,6m)
Heat load to the environment
Site conditions
Maximum altitude above sea level
Minimum side clearance
Minimum front clearance
Minimum back wall clearance
Minimum top clearance
|
12-4 Model 3907 & 3948
Unit
°C (°F)
% r.F.
°C (°F)
% r.F.
h
dB(A)
W / BTU
hour
Unit
m/y NN
mm/in
mm/in
mm/in
mm/in
Continuing research and improvements may result in specification changes at any time. Performance plus or
minus the least significant digit unless otherwise specified.
1
Installation category (overvoltage category) defines the level of transient overvoltage which the instrument is
designed to withstand safely. It depends on the nature of the electricity supply and its overvoltage protection
means. For example, in CAT II which is the category used for instruments in installations supplied from a
supply comparable to public mains such as hospital and research laboratories and most industrial
laboratories, expected transient overvoltage is 2500V for a 230V supply.
2
Pollution degree describes the amount of conductive pollution present in operating environment. Pollution
degree 2 assumes that normally only non-conductive pollution such as dust occurs with the exception of
occasional conductivity caused by condensation.
3907
16 - 32 (61 - 90)
20 - 60 (68 - 140)
≤ 48
1750 / 6000
Models
3907 3948
2000/2187
150 / 5.9
1100 / 43.3
250 / 9.8
250 / 9.8
Models
3948
55
90
3
≤ 50
1750 / 6000
150 / 5.9
1100 / 43.3
250 / 9.8
250 / 9.8
Thermo Scientific