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2620A, 2625A
Users Manual
3-16
Table 3-11. Measurement Rate Selection
Press these buttons: RATE(
KJ)] G
D
E
To select from these
choices:
SLO
FAST
(Completes selection
and returns to Inactive
Mode)
Triggering
To set the scan triggering type from the front panel, use the procedure shown in Table 3-
12.
Table 3-12. Trigger Type Selection
Press these buttons: TRIGS(
KJ)] G
D
E
To select from these
choices:
OFF
On
ALAr
Note: The three trigger types signify:
"OFF" External triggering is disabled. Scan trigger is controlled by scan interval.
"ON" External triggering is enabled. A low input on the rear-panel TR terminal affects scanning as
follows:
If the instrument is in Inactive Mode, or just the Monitor Function is on, the low input enables scanning.
When the signal on the TR terminal returns to high, scanning is disabled.
If scanning is already enabled, the external trigger initiates a single scan. If a scan is already in progress,
this request is ignored.
"ALAr" An alarm condition on the monitor channel automatically triggers a scan. (External triggering is
disabled.)
External Triggering
The external trigger setting offers additional control of scan starts through a separate
trigger line on the rear panel. Refer to Chapter 5 for an in-depth discussion of external
triggering.
Changing the Temperature Unit
The displayed temperature unit can be degrees Celsius (ºC) or Fahrenheit (ºF). To switch
this setting, start with the instrument powered off, then press and hold B while
pressing POWER ON. After the instrument beeps and the new temperature unit is shown
in the display, release B.
The units setting can also be changed through the Computer Interface with the
TEMP_CONFIG command (refer to Chapter 4.)