Mastech HY3003D User manual

USER’S MANUAL
DC REGULATED POWER SUPPLY

- -
1
DC POWER SUPPLY
BRIEF INTRODUCTION:
The HY3000 and HY5000 series variable DC power supplies are very stable, regulated DC power
supplies allowing continuous adjustment of both the output voltage and output current levels.
The HY3000 and HY5000 series have LED displays, the HY3000C and HY5000C have analogue
displays and the HY3000D and HY5000D series have LCD displays.
MODELS:
MODEL
HY3002 HY3003 HY3005 HY3006 HY5002 HY5003 HY6003E
HY3002C HY3003C HY3005C HY3006C HY5002C HY5003C HY6003C
HY3002D HY3003D HY3005D HY3006D HY5002D HY5003D HY6003D
REGULATED
OUTPUT VOLTAGE 0-30V 0-30V 0-30V 0-30V 0-50V 0-50V 0-60V
REGULATED
OUTPUT CURRENT 0-2A 0-3A 0-5A 0-6A 0-2A 0-3A 0-3A
1. TECHNICAL PARAMETERS
1.1 Input voltage : 104~127V AC (60Hz), or 207~253V AC (50Hz)
1.2 Line regulation: CV ≤ 0.01%+1mV CC ≤ 0.2%+1mA
1.3 Load regulation: CV ≤ 0.01%+3mV(I ≤ 3A) CC ≤ 0.2%+3mA(I ≤ 3A)
CV ≤ 0.01%+5mV(I>3A) CC ≤ 0.2%+5mA(I>3A)

- -
2
1.4 Ripple and noise: CV ≤ 0.5mVr.m.s (I ≤ 3A) CC ≤ 3mAr.m.s (I ≤ 3A)
CV ≤ 1.0mVr.m.s (I>3A) CC ≤ 6mAr.m.s (I>3A)
1.5 Protection: constant current or short-circuit protection
1.6 Voltage indication accuracy: LED/LCD
± 1%+2digits, analogue display 2.5%
1.7 Current indication accuracy: LED/LCD ± 2%+2digits, analogue display 2.5%
1.8 Environment: 0 ~+40 0C Relative humidity: <90%
2. OPERATION
2.1 Front panel controls.
(1) Current indication.
(2) Voltage indication
(3) Fine adjustment of current
(4) Coarse adjustment of current.
(5) Fine adjustment of output voltage.
(6) Coarse adjustment of output voltage.
(7) Power ON/OFF switch
(8) Negative output terminal.
(9) Ground connection.
(10) Positive output terminal.
(11) Constant current mode indicator
(12) Constant voltage mode indicator

- -
3
2.2 Operating procedure
2.2.1 For constant voltage mode adjust controls 3 & 4 clockwise to the maximum position. Switch
on the power ON/OFF switch 7 and adjust controls 5 & 6 to set the desired output voltage.
Connect the load to the output terminals 8 & 10.
2.2.2 For constant current mode adjust controls 5 & 6 clockwise to the maximum position. Adjust
controls 3 & 4 anti-clockwise to the minimum position. Switch on the power ON/OFF switch 7 and
connect the load to the output terminals 8 & 10. Adjust controls 3 & 4 to set the desired output
current.
2.2.3 For restricted current protection mode switch on the power ON/OFF switch 7, adjust controls
3 & 4 anti-clockwise to the minimum position, adjust controls 5 & 6 clockwise to set the desired
output voltage level and then connect the load to the output terminals 8 & 10. Adjust controls 3 & 4
clockwise to set the output current at the desired level for restricted current protection.
! 3. ATTENTION:
3.1 In the event of a short circuit at the output the current will limit at the value set by the current
controls, however the unit should be turned off and the short circuit removed before continuing
use.
3.2 The mains power must be switched off before servicing and servicing should be referred to a
qualified person.

- -
4
3.3 The unit should be stored in a dry and well ventilated place and the power cord removed if
storing for long periods.
4. ACCESSORIES
4.1 Power cord-------------------------------one piece
4.2 Instruction manual----------------------one piece