Secondary Functions; Display Lock; Preselection Of Min/Max Mode - Gossen MetraWatt Metraclip 72 Manual De Instrucciones

Note 3:
The measurement principle is based on a certain frequency
stability and practically sinusoidal signals (THD < 10%).
This excludes in particular measurement on power generators
whose spin stabilisation system is too weak to ensure
adequate frequency stability.
Action
Switch on
the position
Press
the yellow key
Cable connected
black on L1 and
contact displays
red cable on L2
Red cable contact
on L3 (less than
10 seconds after
leaving L2)
Press yellow key

3.12 Secondary Functions

3.12.1 Display lock

A short pressing on the HOLD key freezes the display.
A second pressing unlocks the display.

3.12.2 Preselection of MIN/MAX mode

A short pressing on the HOLD key then on the MIN/MAX key
preselects the MIN/MAX mode. A second pressing on the
HOLD key makes the MIN/MAX mode effective.
This function is used to select the MIN/MAX mode upon
request to prevent, for example, the unwanted or mistaken
integration of MIN/MAX values.
Display
rEF
Err V (2 s) then
Err V (2 s) then
rEF OK
MEAS
Err V (2 s) then
Err V (2 s) then
Err
1.2.3
3.2.1
37
Comments
Enter the function
The unit is ready to detect
the reference period
after 10 seconds maximum
result is one of the 3 following
opposite:
→ if voltage < 50 V
→ if nominal freq. ≠ 50 Hz or 60 Hz
→ if reference period correct
The unit determines the period
measurement, the following
messages may be displayed
(after 10 s max) :
→ determination of period
for measurement in progress
→ contact on L3 a was performed
too late (more than 10 s
after display rEF OK )
→ voltage incorrect
→ frequency incorrect
→ determination of phase
direction impossible
→ direct direction of phase
rotation
→ reverse direction of phase
rotation
Return to beginning of sequence
(valid at all times in the
sequence)