English
4
General Specification for all models
Ambient temperature: 5 to 40°C (41 - 104°F)
Fluid type:
Mineral oil to ISO 11158 category HM
(for other fluid types please contact Sales).
Fluid temperature:
DHT & HT - 0 to 120°C (32 - 250°F)
DHM - 0 to 105°C (32 - 220°F)
Accuracy:
see model specifications
EMC Environment:
This equipment is intended for use within industrial and residential
environments and does not suffer any degradation in operation when
subjected to test conditions according to requisite standards.
Construction materials
Case:
Painted mild steel
Flow block:
High tensile aluminium
Seals:
FKM as standard - EPDM seals on request
Battery Details
PP3 9 volt Alkaline (IEC6LR61, ANSI/NEDA 1604A)
Dimensions and Weight
Model
Height
Width
Depth
Weight
DHT401
HT302/402
200 mm
240 mm
200 mm
6.5 kg
DHT302/402
7.87 inches
9.45 inches
7.87 inches
14.33 lbs
DHM404
DHT801
HT602/802
225 mm
245 mm
225 mm
10 kg
DHT602/802
8.86 inches
9.65 inches
8.86 inches
22 lbs
DHM804
Fluid viscosity
The performance of the tester can be affected by the viscosity of the fluid measured. Our testers
are calibrated at a mean viscosity of 21 cSt using ISO32 hydraulic mineral oil to ISO11158
category HM. The shaded area of the table shows the range of viscosities that can be measured
by a tester with standard calibration with minimal effect on the accuracy (less that ± 1% FS).
Table showing kinematic viscosity (cSt) of different mineral
oils at specific temperatures
Fluid type
Temp °C
ISO15 ISO22 ISO32 ISO37 ISO46 ISO68
0
85.9 165.6 309.3 449.9 527.6 894.3
10
49.0 87.0 150.8 204.7 244.9 393.3
20
30.4 50.5 82.2 105.5 127.9 196.1
30
20.1 31.6 48.8 59.8 73.1 107.7
40
14.0 21.0 31.0 36.6 44.9 63.9
50
10.2 14.7 20.8 23.9 29.4 40.5
60
7.7 10.7 14.7 16.5 20.2 27.2
70
6.0 8.1 10.9 12.0 14.6 19.2
80
4.8 6.4 8.4 9.1 11.1 14.3
90
4.0 5.2 6.6 7.2 8.7 11.1
100
3.3 4.3 5.5 6.0 7.1 8.9
ISO 15, 22, 32, 46 and 68 based on typical figures for the Esso Nuto range of
HM oils. ISO 37 based on Shell Tellus HM oil.
