2
General Power Meter Functions
78
N1913/1914A EPM Series Power Meters User’s Guide
Zero/Cal Lockout
The Zero/Cal Lockout facility provides a mean of ensuring that a
measurement cannot be taken until the connected sensor has been zeroed
and calibrated. If the Zero/Cal Lockout facility is enabled and a sensor is
connected which have not been zeroed and calibrated, then the display
window for the sensor will display the message
Please Zero and Cal
.
Figure 2-42
Please zero and calibrate window
When you zero the sensor, the message changes to
Please Cal
. If you
calibrate the sensor before zeroing it, the message changes to
Please Zero
.
Dual channel meters display channel specific messages when a sensor is
connected. The Zero/Cal Lockout configuration is applied to both channels
- it cannot be applied to one channel only.
You can enable and disable the Zero/Cal Lockout facility from the System
menu or the Cal menu as follow:
Press ,
,
or
.
Similarly,
press , ,
or
.
1 of 2
Must Cal Off
On
1 of 2
Must Cal Off
On