- Up to 1,2 kW allowable; special versions up to 5 kW available
- Constant Resistance Mode; Resistance-ranges are continuierly adjustable from 0,1 to 9990 Ohm
- Constant Current Mode; continuierly adjustable between the current range 0 . . . 50 A; modifyable up to 500 A
- Voltage Mode or Power Mode are available on request
- Dynamic Current Mode;adjustable at the front panel or remote
- Dynamic Voltage Mode; adjustable at the front panel or remote
- Built-in Oszillator to switch between 10 Hz . . 1 kHz; up to 20 kHz at the external analog input
- IEEE-488-Interface, Listener and Talker with SRQ
- the two channels (up to 12 channels = 12 electronic loads) are controlled with one master interface
- Input of Resistance: 400 steps between 100 mOhm and 1000 Ohm
- Input of Current: 1°/ . . steps of the nominal value
- Measurd values of Voltage an Current, calculated vlaues of Resitance and Power are available on the IEEE-BUs 488 under program control
- Load-Inputs can be opend, colsed and shortened
- Overpower Protection
- Overvoltage Protection
- Overcurrent Protection
- Overtemperature Protection
- Protection against wrong Polarity
- Digital Plasmadisplay: all measured values are indicated
Specifications
| Model | Voltage | Current |
|---|---|---|
| 8502 A | 3 . . . 60 V | 0,1 . . . 50 A |
| 8502 B | 5 . . . 100 V | 0,1 . . . 25 A |
| 8502 C | 15 . . . 300 V | 0,1 . . . 15 A |
| 8502 D | 25 . . . 600 V | 0,1 . . . 10 A |
Power per Channel: 600 Watt
Temperature range: 0 - 40 °C
Current setting: with two 10-turn-potentiometers; 0 . . . 100 %
Resistance setting: with two 10-turn-potentiometers; 0,1 Ohm . . . 990 Ohm - (Option 7) 9990 Ohm
Ext. Analog input: 0,1 V/A load current
Risetime: 0,4 µS / Ampere; 10 - 90 %
Falltime: 0,6 µS / Ampere; 90 -10 %
Settling time: < 40 µS
Overshoot: < 2 %
Display: Voltage 3-digit, Current 4-digit- Power 4-digit further overload display in clear test for Current, Voltage, Power or Temperatures
Accuracy Current: +/- 0,4 % of range; +/- 1 Digit Voltage: +/- 0,4 % of range; +/- 1 Digit Power: +7- 1,0 % of range; +7- 1 Digit
Analogoutputs Current: 10 V for 100 % max. nominal current Voltage:
| Model | Voltage |
|---|---|
| 8502 A | 0,1 V/V |
| 8502 B | 0,1 V/V |
| 8502 C | 50 mV/V |
| 8502 D | 50 mV/V |
Clock: +14 V squarewave
Overload disconnection with display of exeeded value
The powerstage has - conditioned by the analog inputs an outputs - connection over 200 kOhm against common. In cases in which this resistance is too low, it´s necessary to renounce of the possibility of exernal analog input an output signals. Anyhow, lead jumpings can be done between the two presented loads or under program cotnrol, because the IEEE-488-bus is isoltaed via optocouplers as well as the external clock input for switching between the presented loads.
Other values for voltage, current power, also different between the presented loads.
Options and auxiliary Instruments
| Artikel | Bezeichnung |
|---|---|
| Option 01 | IEEE-488-interface |
| Otion 02 | Power setting, as an additionaly kind of load |
| Option 03 | Voltage setting as an additionaly kind of load |
for options and accesories look a data sheet
Mains: 220 V, 45 V, 50/60 Hz
Dimension an weight: B 19" H 400 mm T 485 mm
Bench/Rack 50/36 kg