13
Table 2.
5.
5.
5.
5.
9
9
9
9
Failure and Cause
5.9.1
5.9.1
5.9.1
5.9.1
Without Voltage Output
(1) The
±
15V Aux. Power supply does not work.
(2) The Local/Remote (R/L) switch position is not correct.
(3) The output switch is not turned on.
5.
5.
5.
5.
9
9
9
9
.2
.2
.2
.2
The output voltage can not be set up to the required value.
(1) The CC point is turned to low, it should be turned to higher.
(2) The output terminal has been shorted.
(3) On the PC boards Q
1
or Q
2
may be damaged.
5.
5.
5.
5.
9
9
9
9
...
.
3
3
3
3
Unstable Operation
(1)
±
15V voltage of the aux. Power supply does not stabilize.
(2) V
3
or V
4
on the PC board does not operate normally
5.
5.
5.
5.
10
10
10
10
Normal Operating Voltage of the Instrument
The “+”output terminal is a reference point when the instrument is measured.
5.
5.
5.
5.
10
10
10
10
.1
.1
.1
.1
The voltage of the aux. power supply is
±
15V.
5.
5.
5.
5.
10
10
10
10
.2
.2
.2
.2
The voltage of each measured point on the PC board.
V
2
= 6. 1v
REFV = 0~-10V
REFC = 0~-10V
CCAMP= 0~ - 10V
When operating in CV mode:
C.V = 0~4v C. c = +14V
When operating in CC mode:
C.V = +l4v C. c = 0~4v
6
6
6
6
...
.
COMPLETENESS
COMPLETENESS
COMPLETENESS
COMPLETENESS
OF
OF
OF
OF
THE
THE
THE
THE
INSTRUMENT
INSTRUMENT
INSTRUMENT
INSTRUMENT
The instrument suite includes:
(1) DHl715A master unit
l set
(2) Cartridge fuse BGxP
Φ
5x20
Input fuse 2A
2
(3) Instrument Manual
2
7
7
7
7
...
.
STORAGE
STORAGE
STORAGE
STORAGE
The instrument should be save up in a ventilated room where the ambient temperature is 5
-
Model
Adjustment
DH1715A-3
32V~2A
DH1715A-5
32V~3A
Calibrated. Standard
Ammeter I
1
2A
3A
Max. Variable CV Setting Range E
0 (max.)
33.3V
33.3V
Max. Variable CV Setting Range I
0 (max.)
2.10A
3.15A
setting of Relay Switch
Circuit
20V,10.5V
20V,10.5V
Model
DH1715A-3
DH1715A-5
Specs of fuse
2A
2.5A
