OPERATING MANUAL
150 WATT ELECTRONIC LOAD MODULE
Agilent Model 60501B
FOR MODULES WITH SERIAL NUMBERS:
3118A-00101 AND ABOVE
Agilent Part No. 60501-90009
Microfiche No. 60501-90010
Printed in U.S.A.
June, 1991
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150-Watt Module
About This Manual
This manual provides information for the Agilent 60501B 150-Watt Electronic Load Module. It is designed as a
supplement to the Agilent 6050A/6051A Multiple Input Mainframe Electronic Load Operating Manual (part number 06050-
90001). Four tables provide the following module-specific information:
Table 60501-1 lists both the specifications and supplemental characteristics of the module. Specifications indicate
warranted performance in the 25 °C ± 5 °C region of the total temperature range (0 to 55° C). Supplemental characteristics
indicate non-warranted, typical performance and are intended to provide additional information by describing performance
that has been determined by design or type testing.
Table 60501-2 lists the ranges that can be programmed in constant current, constant resistance, and constant voltage modes.
It shows the maximum and minimum programming values for each range. Refer to this table when programming the
module locally as described in Chapter 4, or remotely as described in Chapter 5 of the operating manual.
Table 60501-3 gives the factory default values of the module. Unless you have saved your own wake-up settings, the
module will be set to the factory default values whenever power is applied. See Chapter 4 in the operating manual.
Table 60501-4 provides calibration information for the module. This information is needed to perform the annual
calibration procedure described in Chapter 6 of the operating manual.
Module Installation and Operation
Except for the module-specific information in this manual, all installation, operation, and calibration instructions are given
in the Mainframe Operating Manual. The Agilent Electronic Load Family Programming Reference Manual (part number
06060-90005) contains complete programming details that apply to all Electronic Load models.
Note:
The following information in Chapter 2 of the Mainframe Operating Manual does not apply to electronic
load modules with the serial numbers listed on the title page of this manual: The section titled "Extended
Power Operation", and the section titled "Extended Power Limit". Also for these modules, change the 3-
second delay referred to under "Nominal Power Limit" to 50 milliseconds.
Items Supplied
In addition to this manual, a 10-pin connector plug is also shipped with your Electronic Load module. Refer to Chapter 3 in
the operating manual for more information.
1
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Table 60501-1. Specification and Supplemental Characteristics
SPECIFICATIONS
DC Input Rating:
Current: 0 to 30 A
Voltage: 3 to 60 V (minimum dc operation from 0 to 2 V for 0 to 30 A)
Power: 150 W at 40 °C (derated to 112 W at 55 °C)
A. OPERATING CHARACTERISTICS
B. DERATED CURRENT DETAIL
Constant Current Mode:
Ranges:
0 to 3 A; and 0 to 30 A
Accuracy:
Resolution:
Regulation:
(after 30 second wait): ± 0.1% ± 40 mA (both ranges)
0.8 mA (3 A range); 8 mA (30 A range)
10 mA (both ranges)
Temperature Coefficient:
100 ppm/°C ± 3 mA/°C (both ranges)
Constant Resistance Mode:
Ranges:
0.067 to 2 Ω; 2 Ω to 2 kΩ; and 20 Ω to 10 kΩ
Accuracy:
± 0.8% ± 16 mΩ with ≥ 6 A at input (2 Ω range);
± 0.3% ± 5 mS with ≥ 6 V at input (2 k and 10 kΩ ranges)
0.54 mΩ (2 Ω range); 0.14 mS (2 kΩ range); 0.014 mS (10 kΩ range)
10 mV with remote sensing (2 Ω range); 10 mA (2 k and 10 kΩ ranges)
800 ppm/°C ± 0.8 mΩ/°C (2 Ω range);
Resolution:
Regulation:
Temperature Coefficient:
300ppm/°C ± 0.5 mS/°C (2 k and 10 kΩ ranges)
Constant Voltage Mode:
Range:
0 to 60 V
Accuracy:
± 0.1% ± 50 mV
Resolution:
16 mV
Regulation:
Temperature Coefficient:
5 mV (remote sense); 40 mV (local sense)
100 ppm/°C ± 5 mV/°C
2
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Table 60501-1 Specifications and Supplemental Characteristics (continued)
Transient Operation:
Continuous Mode
Frequency Range:
0.25 Hz to 10 kHz
Frequency Resolution:
Frequency Accuracy:
Duty Cycle Range:
4%
3%
3% to 97% (0.25 Hz to 1 kHz); 6% to 94% (1 kHz to 10 kHz)
Duty Cycle Resolution:
Duty Cycle Accuracy:
4%
6% of setting ± 2%
Pulsed Mode
Pulse Width:
50 µs ± 3% minimum; 4 s ± 3% maximum
Transient Current Level (0 to 3 A and 0 to 30 A ranges):
Resolution:
13 mA (3 A range); 130 mA (30 A range)
Accuracy:
± 0.1% ± 40 mA (3 A range); ± 0.1% ± 200 mA (30 A range)
Temperature Coefficient:
100 ppm/°C ± 5 mA/°C
Transient Resistance Level (0.067 to 2 Ω, 2 Ω to 2 kΩ, and 20 Ω to 10 kΩ ranges):
Resolution:
Accuracy:
8.6 mΩ (2 Ω range); 2.1 mS (2 kΩ range); 0.2 mS (10 kΩ range)
± 0.8% + 16 mΩ with > 3 A at input (2 Ω range)
± 0. 3% + 5 mS with ≥ 6 V at input (2 kΩ range)
± 0.3% + 5 mS with ≥ 6 V at input (10 kΩ range)
Transient Voltage Level (0 to 60 V):
Resolution:
260 mV
Accuracy:
Temperature Coefficient:
± 0.1% ± 300 mV
150 ppm/°C ± 5 mV/°C
Current Readback:
Resolution:
Accuracy:
Temperature Coefficient:
9 mA (via GPIB); 10 mA (front panel)
(after 30 minute wait): ± 0.06% ± 40 mA
65 ppm/ °C ± 3 mA/ °C
Voltage Readback:
Resolution:
Accuracy:
17 mV (via GPIB); 20 mV (front panel)
± 0.05% ± 45 mV
Temperature Coefficient:
Maximum Readback Capability:
50 ppm/°C ± 1.2 mV/°C
65 to 70 V (typical)
Power Readback:
Accuracy:
±0.2% ± 2 W
3
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Table 60501-1 Specifications and Supplemental Characteristics (continued)
External Analog Programming 0 to 10 V (dc or ac):
Bandwidth:
Accuracy:
10 kHz (3 db frequency)
± 4.5% ± 40 mA (0 to 3 A range)
± 4.5% ± 130 mA (0 to 30 A range)
± 0.8% ± 200 mV (0 to 60 V range)
100 ppm/°C ± 3 mA/°C (current ranges)
100 ppm/°C ± 1 mV/°C (voltage range)
Temperature Coefficient:
External Current Monitor (0 to 10 V):
Accuracy:
± 4% ± 40 mA (referenced to analog common)
Temperature Coefficient:
60 ppm/°C ± 3 mA/°C
External Voltage Monitor (0 to 10 V):
Accuracy:
± 0.25% ± 40 mV (referenced to analog common)
Temperature Coefficient:
50 ppm/ °C ± 0.2 mV/ °C
Remote Sensing:
5 Vdc maximum between sense and input binding posts
Maximum Input Levels:
Current:
30.6 A (programmable to lower limits)
75 V
Voltage:
Minimum Operating Voltage:
2 V (derated to 0 V at 0 A)
PARD (20 Hz to 10 MHz noise):
Current:
Voltage:
2 mA rms/20 mA p-p
5 mV rms
DC Isolation Voltage:
± 240 Vdc between + or - input binding post and chassis ground
Digital Inputs:
Vlo:
Vhi
0.9 V maximum at Ilo = -1 mA
3.15 V minimum (pull-up resistor on input)
Digital Outputs:
Vlo:
Vhi:
0.72 V maximum at Ilo = 1 mA
4.4 V minimum at Ilo - 20 µA
SUPPLEMENTAL CHARACTERISTICS
Programmable Slew Rate (For any given input transition, the time required will be either the total slew time or a minimum
transition time, whichever is longer. The minimum transition time increases when operating with input currents under 1 A.
The following are typical values; ±25% tolerance):
4
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Table 60501-1 Specifications and Supplemental Characteristics (continued)
Current Slew Rate:*
Rate # 30 A Range Step
0.5 A/ms
1.2 A/ms
3 A Range Step
0.05 A/s
0.12 A/s
0.25 A/ms
0.5 A/ms
1.2 A/ms
2.5 A/ms
5 A/ms
Transition Time
8.0 ms
3.2 ms
1.6 ms
800 µs
320 µs
160 µs
80 µs
32 µs
16 µs
12 µs
12 µs
1
2
3
4
2.5 A/ms
5 A/ms
5
6
12 A/ms
25 A/ms
7
8
9
10
11
12
0.05 A/µs
0.12 A/µs
0.25 A/µs
0.5 A/µs
1.2 A/µs
2.5 A/µs
12 A/ms
25 A/ms
0.05 A/µs
0.12 A/µs
0.25 A/µs
12 µs
*AC performance specified from 3 to 60 V.
Voltage Slew Rate:
Rate # Voltage Range Step
Transition Time*
8.0 ms
3.2 ms
1.6 ms
800 µs
320 µs
160 µs
85 µs
85 µS
1
2
3
4
5
6
7
8
9
1 V/ms
2.5 V/ms
5 V/ms
10 V/ms
25 V/ms
50 V/ms
0.1 V/µs
0.25 V/µs
0.5 V/µs
85 µS
*Transition time based on low capacitance current source.
Resistance Slew Rate (2 Ω range): Uses the value programmed for voltage slew rate.
Resistance Slew Rate (2 k and 10 kΩ ranges): Uses the value programmed for current slew rate.
Transient Current Overshoot (When programmed from 0A):
Range
30 A
Transient Current Level
Current Slew Rate
All slew rates
0.5 A/µs to 2.5 A/µs
0.5 A/ms to 0.25 A/µs
Overshoot*
3-30 A
1.5 A
1.5 A
0
6%
0
3 A
3 A
1.5 A
1.5 A
All slew rates
0.13 A/µs and 0.25 A/µs
0.05 A/ms and 0.05 A/µs
0
3%
0
*Overshoot may be higher during first five seconds of programming if unit has been operating at full current. Overshoot
values assume a total inductance of lµH, or less, in the load leads connected to the D.U.T.
5
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Table 60501-1 Specifications and Supplemental Characteristics (continued)
Source Turn-On Current Overshoot: Less than 10% of final value (in CC and CR modes when connected to power
supplies with voltage rise times of greater than 500µs).
Programmable Short Circuit: 0.066 Ω (0.04 Ω typical)
Programmable Open Circuit: 20 kΩ (typical)
Drift Stability (over an 8 hour interval):
Current:
Voltage:
± 0.03% ± 5 mA
± 0.01% ± 10 mV
Reverse Current Capacity:
Weight:
50 A when unit is on; 20 A when unit is off
3.2 kg (7 lbs.)
Table 60501-2. Programming Ranges
Function
Front Panel
Key
Front Panel
Display
HPSL Command
(Short Form)
Range of Values
Constant Current
Set Range
C:RNG value
"CURR:RANG value"
Low Range
High Range
Set Main Level
≥ 0 and ≤ 3 A
> 3 A and ≤ 30 A
CURR value
C:SLW value
"CURR value"
Low Range
High Range
Set Slew Rate
0 to 3 A
0 to 30 A
"CURR:SLEW value"
(shift)
Low Range
High Range
Set Transient Level
0.00005 to 0.25 (A/µs)
0.0005 to 2.5 (A/µs)
same as main level
same as main level
C:TLV value
R:RNG value
"CURR:TLEV value"
"CURR:TRIG value"
*Set Triggered Level
Constant Resistance
Set Range
"RES:RANG value"
Low Range
Middle Range
High Range
Set Main Level
Low Range
≥ 0 and ≤ 2 Ω
> 2 Ω and ≤ 2 kΩ
>2 kΩ and ≤ 10 kΩ
RES value
"RES value"
0 to 2 Ω
Middle Range
High Range
Set Slew Rate
2 Ω to 2 kΩ
20 Ω to 10 kΩ
(shift)
(shift)
Low Range
Middle/High Range
Set Transient Level
V:SLW value
C:SLW value
R:TLV value
"VOLT:SLEW value"
"CURR:SLEW value"
"RES:TLEV value"
same as voltage slew
same as current slew
same as main level
*Set Triggered Level
Constant Voltage
Set Main Level
"RES:TRIG value"
same as main level
VOLT value
V:SLW value
V:TLV value
"VOLT value"
0 to 60 V
Set Slew Rate
"VOLT:SLEW value"
"VOLT:TLEV value"
"VOLT:TRIG value"
0.001 to 0.5 (V/µs)
same as main level
same as main level
Set Transient Level
*Set Triggered Level
6
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Table 60501-2. Programming Ranges (continued)
Transient Operation
Set Frequency
FREQ value
"TRAN:FREQ value"
"TRAN:DCYC value"
0.25 Hz to 10 kHz
Set Duty Cycle
DCYCLE value
3-97% (0.25 Hz-1 kHz)
(shift)
6-94% (1 kHz-10 kHz)
0.00005 to 4 s
*Set Pulse Width
"TRAN:TWID value"
"TRIG:TIM value"
Trigger Operation
*Set Trigger Period
Current Protection
*Set Current Level
*Set Delay Time
0.000008 to 4 s
"CURR:PROT value"
"CURR:PROT:DEL value"
0 to 30.6 A
0 to 60 s
*Can only be programmed remotely via the GPIB.
Table 60501-3. Factory Default Settings
Function
CURR level
CURR transient level
*CURR slew rate
CURR range
Settings
0 A
0 A
0.5 A/µs
30 A
Function
Setting
CC
Mode (CC, CR, CV)
Input (on/off)
Short (on/off)
on
off
Transient operation (on/off)
***TRAN mode
(continuous, pulse, toggle)
TRAN frequency
off
continuous
*CURR protection (on/off)
**CURR protection level
**CURR protection delay
off
30.6 A
15 s
1 kHz
50%
TRAN duty cycle
RES level
RES transient level
RES range
**TRAN pulse width
0.5 ms
2 kΩ
2 kΩ
2 kΩ
**TRIG source
hold
(bus, external, hold, timer, line)
**TRIG period
**PORT0 output (on/off)
**CAL mode (on/off)
VOLT level
VOLT transient level
VOLT slew rate
60 V
60 V
5 V/µs
0.001 s
off (logic 0)
off
The *RST command resets the CURR slew rate to 2.5 A/µ, not to the factory default.
**Can only be programmed remotely via the GPIB.
***Continuous transient mode is the only mode available at the front panel. Pulsed, toggled, and continuous modes can
all be programmed remotely via the GPIB.
7
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Table 60501-4. Calibration Information
Ranges and
Variables
Variables
Value
30
Power Supply
Settings
Current
Shunt
100 A
Calibration Points
High Current Range
High Current Offset
Low Current Range
Low Current Offset
Voltage Range
Hi_curr_rng
Hi_curr_offset
Lo_curr_rng
Lo_curr_offset
N/A
5 V/31 A
0.013
3
0.013
N/A
60
5 V/10 A
61 V/2 A
15 A
N/A
Voltage Hi point
Volt_hipt
Voltage Lo point
Volt_lopt
2.7
Low Resistance Range
Low Resistance Hi point
Low Resistance Lo point
Middle Resistance Range
Middle Resistance Hi point
Middle Resistance Lo point
High Resistance Range
High Resistance Hi point
High Resistance Lo point
Lo_res_rng
Lo_res_hipt
Lo_res_lopt
Mid_res_rng
Mid_res_hipt
Mid_res_lopt
Hi_res_rng
Hi_res_hipt
Hi_res_lopt
2
1.9
0.067
20
60
15 V/5.5 A
10.9 V/8 A
60 V/5 A
15 A
15 A
15 A
2.1
2002
200
24
8
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Technical data is subject to change.
9
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