Dwyer HM35 - Manual (Page 7)

3.4 Functions and operating modes
Key clear hold
1)
Start
2)
Functions
PRESSURE
DIFFERENCE
Zero: sets
measured value to
zero
3)
▲ MIN/MAX Sets Max/Min to
current measured
value
To Menu selection
--
▼ AVERAGE
4)
CHANGE RATE
5)
Freezes all
current
measurement
values
Starts measuring
DATA LOGGING
Sets measured
value to zero
3)
--
Stop/Menu
Starts data
logging
Notes
1) Once a measurement procedure has been started, the menu selection is blocked.
2) During a measurement procedure (after Start has been pressed), you can switch
between functions. This permits, for example, the observation of the Min/Max
function during data logging.
3) The Clear key has no function in the absolute pressure instruments.
4) The AVERAGE function creates an arithmetic average value of all measured values
during the time period selected in the menu. After expiry of the time period, the
average value will be displayed.
5) Measurement of the leak rate (diff/gauge sensor) or tendency (abs. sensor). The
pressure change (CHANGE RATE) from the start time to the current time will be
displayed. The first display occurs 10 s after the start.
3.5
Menu selection and set-up
Navigation within the Menu selection
Brief (< 1 s) 1 level back
clear
Long (> 1 s) Back to the function level/operating modes
▲▼ Selection of Set-up/Functions
The functions shown inverted on the display will be carried out if the Function key
(
) is pressed.
The currently selected setting for values is marked with '9'. In the following table, the
default values are correspondingly marked (factory settings).
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