18
Parameter
Detector Family
Default Condition
D_BUF_SIZE
100
Data Store Units
Same as UNITS
EXT
OFF
EXT TRIG IN
FALLING
TRIGGER OUT
TRIG ON CMPLT
TRIG OUT POL
TRIG ACTIVE LO
TRIG OUT FREQ
FREQ = 30 Hz
TRIG LEVEL
Low-Power, High-Power
LVL = 0.001 W
Energy
LVL = 0.001 J
TRIG INTG LVL
Low-Power, High-Power
INTG = 0.001 J
BAR GRAPH
ON
TONE
OFF
GPIB ADDR
05
BAUD RATE
9600
RS-232 ECHO
OFF
These parameters adopt the following default values at power up and are not
affected by recalling a configuration or by setting the configuration to default.
Local Lockout
OFF
Display Brightness
NORMAL
Table 10. below lists the menu commands effecting the saving and recalling of
meter configurations.
Table 10 – Meter Configuration Operations
Menu Operation
Keypad Commands
Associated Remote Commands
SAVE CONFIG
Adjust SAVE TO
d
,
*SAV
and ENTER
RECALL CONFIG
Adjust RECALL
d
,
*RCL,*RST
and ENTER
2.4.4
AUTO CAL
The AUTO CAL command causes the 2835-C to perform A/D conversions of
amplifier offset voltages (zero errors) arising from aging and temperature
effects. These conversions are then used in subtracting the appropriate error
voltage from each reading during normal operation. The 2835-C automatically
performs this procedure every time it powers up (or is reset). To achieve
stable reading at the specified accuracy, AUTO CAL should be executed for
each channel after a minimum 60 minute warm-up period from power-up.
Executing AUTO CAL with High Power (Thermopile) detectors:
1. With the detector connected to the 2835-C, remove the detector from the
radiation source and allow a minimum of 60 seconds for the detector
surface temperature to stabilize.
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