. General Specification

1) Input Voltage

115/230 V ± 10% 50/60 Hz

2) Display

Digital Display for Current and Voltage Class 1,5 (not EPJ-3505)
Voltmeter:
Fixed Range: 19,99 V (not EPJ-3505)/ 199,9 V / 1999 V
Accuracy: ± 0,1% (rdg + 2 digit)

at 23°C ± 5°C

Ammeter:
Fixed Range: 199,9 A / 19,99 A / 1,99 A (not EPJ-3505)
Accuracy: ± 1% (rdg + 3 digits)
at 23°C ± 5°C

3) Environment

Operating Environment

Temperature: 0°C ~ 40°C
Humidity: 10% ~ 80%
(Condensation and corrosive gases should be avoided).

Storage Environment

Temperature: -10°C ~ 60°C
Humidity: 10% ~ 80%
(Condensation and corrosive gases should be avoided).

4) Safety Precaution

Fuse at the primary side (Commercial power source will be cut at the time of failure).
Thermal fuse is incorporated inside the power transformer.
(Excessive heating during the time of operating will be prevented).
Fuse inside the internal power circuit. (Circuit will be cut when
it fails).
Forced air cooling type (fan) has a temperature sensor inside.
(Operation stops when the fan becomes out of operation). (not EPJ-3505)

The products fully comply with the CE Mark Safety Standard and conform to EMV Directive and Low Voltage Directive.

Current can be supplied to the load such as capacitance input type electronic equipment with rush current flow.

1) Circuit System

linear type

2) Cooling

Forced Air Cooling (not EPJ-3505)

3) Rating

Constant Voltage

Line regulation: 0,005% + 3 mV (to Input Voltage ± 10%)

Load regulation: 0,005% + 3 mV (to 0 ~ 100% Load)

(Measured at the sensing terminal)

Ripple:  Within 1 mV (10 Hz ~ 1MHz rms) for models
which output voltage is less than 80 V.
Within 3 mV (10 Hz ~ 1 MHz rms) for models
of which output voltage is less than 800 V.

Transient Response: 50 µs typical (0 ~ 100% Load)
100 µs typical (100 ~ 0% Load)
The time required for the output voltage to
recover to a value within the rated voltage
0,005% + 3 mV at the time of 0 ~ 100%
fluctuation of output current.

Temperature-
Coefficient: 50 ppm/ °C typical

Constant Current

Line regulation: 0,05% + 2 mA (to input voltage ± 10%)

Load regulation: 0,05% + 5 mA (to 0 ~ 100% Load)

Ripple: (Maximum operating current value + 10)/Z in (mA)
Z denotes Load impedance at 50 Hz

Temperature-
Coefficient: 100 ppm/ °C typical

4) GP-IB Interface (Optional)

System: IEEE488
Resolution: 16 bit
Port: 24 way amphenol
Programming: Voltage and Current
Function Indicators: Listen, Talk, SQR

5) 19" Rack Mounting

For power supplies of portable type, various accessories for rack-mounting are provided (RMH).

2. Specification

Over voltage Protection (OVP)
Over current Protection (OCP)
Over voltage prevention can be set at a range from 1 V to full scale as desired observing the front output voltmeter.
The output is turned off by SCR (only EPJ-3510/EPJ-3520), simultaneously input power is also turned off. Over current prevention can be set at a range from 0 to full scale as desired.
Over voltage/Over current can be set by PRESET-switch in a state of no load and no output voltage.
Response time is 50 µs (typical).

Over temperature Protection (OTP)

When the temperature of transformer and semiconductor becomes in a state of abnormally due to stoppage of cooling fan, malfunction of power supply etc., the input power its turned off.

Detectable temperature: 100°C for transistor and heatsink

130°C for transformer

Highly accurate programming for output voltage and current by external voltage

Remote programming capability of the output voltage and current is provided with accuracy approximately 0,1% by external voltage (0 – 10 V) since OP AMP precisely adjust circuit.

Features

(VC) Adjustment of output voltage (10 revolution potentiometer)
(CC) Adjustment of output current (10 revolution potentiometer)
(OVP) resets output when voltage exceeds preset voltage.
(PRESET) Output current can b e preset while output-load is set to off.
CV/CC – status indicating LED
Alarm – status indicating LED
Remote sensing terminal (except (EPJ-8001)
Master – Slave – Control (except EPJ-8001)
CV/CC – Remote Control by resistance and voltage signal
GP-IB Interface by build in type (Option)

GB-IB-Interface EPJ-IF

The integrated GP-IB Interface corresponds to a 16 Bit analog/digital transformer (resolving power 1/65535) equipped with four Input or Output channels. Input Voltage und Current can adjusted and immediately read back in each case. The programmer has a list as well a talker function.