Operation
EPM2000/EPM2000e Reference Guide
20
RATIO MODE
Use Ratio Mode to measure the ratio of both channels, either A/B or B/A. Because the channels
must be synchronized for an effective calculation, exactly one channel’s trigger must be slaved. The
EPM2000 will not enter Ratio Mode unless one channel’s trigger is set to SLAVE.
Press
to enter Ratio Mode. Channel B will continue to display the current readings, but Channel
A will display the quotient A/B.
Press
to view the quotient B/A on Channel B’s display. Channel A will display its current reading.
If programmed to store readings in the data buffer, the EPM2000 will store the quotient in the buffer -
- not the raw readings.
If the two channels are set for the same unit, the reading is a unitless ratio of the readings. If the units
are set differently, the reading is a quotient and the units are the appropriate quotient. For example, if
channel A is measuring Volts and B is measuring Joules, pressing
will display the quotient on
channel A. The measurement unit would be V/J (thus an EPM2000 can characterize an attached
Joulemeter’s responsivity).
INSTRUMENT SETTINGS
The EPM2000 is an extremely versatile instrument, with a variety of operating modes and settings. In
addition to the front panel controls, most of the settings listed are accessible via the remote interfaces.
AUDIBLE BEEPER
The EPM2000 generates an audible tone during certain error conditions such as an input overrange,
when the thermopile temperature exceeds 100°C, or when the FIFO is full (for more details, refer to
FIFO Full Condition in the Programming section).
To turn the Beeper option on, press
.
To turn the Beeper off, press
.