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Table showing kinematic viscosity (cSt) of different mineral oils at specific temperatures
Temp °C
0
10
20
30
40
50
60
70
80
90
100
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.
Additional LED indicator functions
The red LED will indicate if the temperature inside the box (PCB) exceeds its maximum
operating limit (70 °C) by flashing at 3 Hz (LCD will show "COOL" for 3 seconds every minute).
If this occurs hydraulic flow must be stopped and the DHT must be allowed to cool to
prevent permanent damage.
To observe the PCB temperature, hold the temperature units' button for > 3sec and when
the red LED blinks (every 1 sec) the temperature display shows the current PCB temperature.
Battery state indications
Battery life is typically >240 hours normal use but this will depend on environmental
conditions.
The energy state is indicated by the battery icon bars, five bars full, one bar almost empty.
After one bar the battery icon will flash, first slow and then fast, culminating in the whole
display flashing just before the meter turns off.
Once the battery icon starts to flash there is typically >2 hours of normal use remaining.
NB. Battery flash rates take priority over service flash rates: A battery low fast flash rate will
also flash the spanner icon at the same rate.
Fluid Type
ISO15
ISO22
ISO32
85.9
165.6
309.3
49.0
87.0
150.8
30.4
50.5
82.2
20.1
31.6
48.8
14.0
21.0
31.0
10.2
14.7
20.8
7.7
10.7
14.7
6.0
8.1
10.9
4.8
6.4
8.4
4.0
5.2
6.6
3.3
4.3
5.5
ISO37
ISO46
ISO68
449.9
527.6
894.3
204.7
244.9
393.3
105.5
127.9
196.1
59.8
73.1
107.7
36.6
44.9
63.9
23.9
29.4
40.5
16.5
20.2
27.2
12.0
14.6
19.2
9.1
11.1
14.3
7.2
8.7
11.1
6.0
7.1
8.9
5
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