Advanced Measurement Technology 273A, User Manual

Page: 43 / 70

Chapter 5—Operating Instructions 37
ii. SCAN1 from E/I 1 to E/I 2.
iii. Scan STOPS on reaching E/I 2.
During DELAY 1 the cell can be either ON or OFF, as programmed. During SCAN 1 the Cell will
be ON. At the end of the scan, the E/I 2 indicator will remain lighted. The cell will remain ON or
OFF according to the state of the applicable Override.
b. SINGLE CYCLE: A Single Cycle is more complex and involves all three programmed
potential/current levels. The sequence is:
i. DELAY 1 at E/I 1.
ii. SCAN1 from E/I 1 to E/I 2.
iii. DELAY 2 at E/I 2.
iv. SCAN 2 from E/I 2 to E/I 3.
Scan STOPS on reaching E/I 3.
During DELAY 1 and DELAY 2 the cell can be either ON or OFF, as programmed. During
SCAN 1 and SCAN 2 the Cell will be ON. At the end of the scan, the E/I 3 indicator will remain
lighted. The cell will remain ON or OFF according to the state of the applicable Override.
c. CONTINUOUS: Continuous is the most complex of the three cycles. The sequence is as
follows:
i. DELAY 1 at E/I 1.
ii. SCAN 1 from E/I 1 to E/I 2.
iii. DELAY 2 at E/I 2.
iv. SCAN 2 from E/I 2 to E/I 3.
v. DELAY 1 at E/I 3.
vi. SCAN 1 from E/I 3 to E/I 2.
vii. Steps iii through vi repeat until STOP key is pressed.
During DELAY 1 and DELAY 2 the cell will be either ON or OFF, as programmed. During SCAN
1 and SCAN 2 the cell will be ON. Automatic cycling of the scan, back and forth from E/I 2 to
E/I 3, will continue until halted by pressing the STOP key. (The cycle returns to E/I 1 when STOP
is pressed.) The cell will be ON or OFF according to the state of the governing Override.
8. [E/I APPLIED]: This key allows a speed constant potential/current to be applied to the cell. If
the associated indicator is lit, it means that E/I APPLIED will be applied if the Cell is ON. The
E/I Applied indicator is lighted at powerup. It extinguishes when the START key is pressed to
begin a scan. The value for the E/I APPLIED parameter is that in effect at the time the
instrument was last powered down, or the last value set if changed since powerup. E/I
APPLIED can take potential values from -10 V to + 10 V. Current values are a fraction of the
selected Current Range up to the maximum possible value of "2" ("1" is maximum on the
1 A range).
There are two ways of changing the value of E/I APPLIED. The simplest is to use the [ ] and
[ ] keys. Anytime a potential/current is applied, these keys can be used to increment