87V Ex
Users Manual
10
Table 4. Pushbuttons
Button
Switch
Positon
Function
N
Selects capacitance
M
Selects temperature
J
Selects ac low pass filter function
P
Switches between dc and ac current
Q
Switches between dc and ac current
A
(Yellow)
Power-up Disables automatic power-off feature (Meter normally powers off in 30 minutes).
The Meter reads
“PoFF” until A is released.
B
Any switch
position
Power-up
Starts recording of minimum and maximum values. Steps the display through MAX, MIN, AVG
(average), and present readings. Cancels MIN MAX (hold for 1 second)
Enables the Meter’s calibration mode and prompts for a password.
The Meter reads “
CAL“ and enters calibration mode. See 87V Ex Service Information.
C
Any switch
position
Switches between the ranges available for the selected function. To return to autoranging, hold
the button down for 1 second.
M
Power-up
Switches between °C and °F.
Enables the Meter’s smoothing feature. The Meter reads “
5___” until C is released.
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