WEBTEC DHM 4 Series Manual page 10

To turn the meter ON press this button momentarily.
To turn the meter OFF press and hold this button.
As the meter turns on two information screens display status data including:
l Current version of software running on the meter.
l Total run time in minutes.
l Turbine type.
l Turbine calibration number.
l Calibration date.
l Meter serial number.
After the two information screens the meter reverts to the previously used display screen.
Note: Low battery warning is issued by the display screen flashing. Reliable operation
cannot be expected in these circumstances - the battery must be replaced.
When the meter is turned ON the contrast buttons can be used to adjust the display
to suite the ambient light conditions. Settings are saved.
Pressing the P-Q button while on screen 1 will toggle the bottom line, temperature
display between power and temperature.
As pressure changes the actual and peak values are updated on the display. Peak
pressure is captured at a typical rate of 1ms, allowing the display of rapid transition
spikes, otherwise missed.
Pressing the clear peaks button clears the peak capture memory.
Pressing the pressure units button scrolls through the available pressure engineering
units. If power is being displayed, then its engineering units will change to suite the
selected pressure units.
Pressing the screen selection button scrolls through the four available screens: digital
display, digital + bar graphs, power/efficiency and record review.
Pressing the P-Q/HP button while in screen 3 initiates the efficiency display. It
captures the flow and pressure to memory and treats this as the 100% reference
point. The bottom line of the display shows the flow and pressure that are saved as
the reference marker:
8
DHM Operation