GENERAL DESCRIPTION
The Model 501J Programmable DC Voltage Standard is a versatile reference
source, designed to
meet the needs of computer systems, production line testing, automated calibration
and standards
laboratories.
The 501J has a specified accuracy, and
are traceable through a bank of saturated standard cells to the U.S. National
Institute of Standards & Technologies. The 501J is a highly accurate reference which can be used for calibration of digital voltmeters, analog meters, semiconductor
analyzing systems, analog references for computers, analog-to-digital converters,
telemetry and
data acquisition systems, and wherever a stable source is required.
The 501J is also equipped with overload
and short circuit protection, and is fully operational in
normal environmental conditions. The unit will drive a short circuit indefinitely
without damage,
and will recover to rated specifications in less than 10ms
SPECIFICATIONS
OUTPUT
|
Range |
Full Scale |
Resolution |
Current |
Zo |
| 10V |
±10.00000Vdc |
10µV |
50mA |
0.03 ohms |
| 100mV |
±100.0000mVdc |
0.1µV |
EMF* into 150k
ohm load |
Constant
3 ohms |
|
* Note: The rated
accuracy of the 100mV range applies when the RL is 150k ohms or higher. (see Output Impedance) e.g.. where Zo = 3 ohms and RL
= 150k
ohms. IR error = 0.002% of programmed value. Remote sensing, 4-terminal, is
provided on all ranges 10V and higher. |
Accuracy (Relative to N.I.S.T. Standards):
±(0.002% of setting + 0.0005% of range + 3µV). The Accuracy statement is based
on the “Limit-of--Error” (or “worst-case”) method. All other specifications noted hereafter, which
affect accuracy,
e.g.., line, load, temperature, drift changes are included in the accuracy statement.
Thus, all other
specifications are listed as *NON-ADDITIVE. Specifications guaranteed for 12 months.
Setting Time: 50µS to 0.002% of programmed voltage, including polarity change.
Stability (*non-additive): 24 hrs., ±0.001%; 90 days, ±0.0015%;1 year, ±0.002%.
Ripple and Noise: 0.0005% of range + 2µVrms in a band-pass of 0.1Hz to 100kHz,
no random spikes.
Output Current: 10V range, 100mV, EMF into 150k ohm load. Note: The rated
accuracy of the
100mV range applies when the RL = 150k ohms or higher. (See Output Impedance)
e.g.
Where Zo = 3 ohms and RL = 150k ohms. IR error = 0.002% of programmed value.
Remote sensing, 4-terminal, is provided on 10V range.
Output Impedance: 10V range, 0.03 ohms; 100mV range, constant 3 ohms.
Regulation (*non-additive): Line and load, ±0.0005%.
Protection: Short-circuit and overload protection with front panel indicator.
Standby/Ready signal
to programmer.
Isolation: Power transformer primary to analog output, 25G ohms, 300pF; control
logic-to-analog
output, with opto-isolators P/N IS-40, 1G ohm 130pF, 500Vdc.
Temperature Coefficient (*non-additive): Ambient, ±0.0005%/°C; operating
limit, ±0.001%/°C.
PROGRAMMING FORMAT
The following information applies to the
Mainframe Model 501, without options, etc. For additional
functions and ranges see the following pages for options, accessories, and auxiliary
instruments.
Parallel Entry
Input Loading Factor: 1 TTL standard load per bit line.
Logic Swing: Logical “0” = 0.8V (max.) Logical “1” = +2V (min.)
Code: Binary coded decimal (BCD).
Logic Lines: 20 lines + strobe + return (parallel entry).
Serial Entry: See accessory KT-488.
MECHANICAL SPECIFICATIONS
Power Requirements: 10 watts,
115V or 230Vac, 50Hz to 60Hz.
Temperature: Calibration, 23°C ±1°C; ambient, 20°C to 30°C; operating
limit,
10°C to 50°C; storage, -40°C to 85°C.
Dimensions: 19.1" (485mm) wide, 5.2" (133mm) high, 14.2" (361mm)
deep.
Weight: 15.5 lbs. (7.0kg) net; 21 lbs. (9.5kg) shipping.
10 watts, 115V or 230Vac, 50Hz to 60Hz.
Temperature: Calibration, 23°C ±1°C; ambient, 20°C to 30°C; operating
limit,
10°C to 50°C; storage, -40°C to 85°C.
Dimensions: 19.1" (485mm) wide, 5.2" (133mm) high, 14.2" (361mm)
deep.
Weight: 15.5 lbs. (7.0kg) net; 21 lbs. (9.5kg) shipping.
ACCESSORIES AND OPTIONS
Straight Binary Entry:
Order 501/J-2, this is the equivalent to 6 decimal digits
or 24 bit resolution.
Range MSB Full Scale LSB
10V 5.12V 10.24V 10µV rounded off
100mV 5.12mV 102.4mV 0.1µV rounded off
Mating Connectors: Supplied with new instruments, field installable.
Program Input: Part No. MP-0156 (for parallel only).
Analog Output: Part No. 3106.
Rack Mounting Brackets (with handles): Part No. RK-01, supplied
with new instruments.
Memory Register: Part No. MR-1 (for parallel only). This eliminates
the requirement to “hold-up”
the bit lines in order to sustain the programmed voltage output. The register will
only respond to the
level command. Thus, the programmer may be used for other functions while the calibrator
voltage
is maintained.
Construction: Plug-in PC board, field installable.
Opto-Isolation: Part No. IS-40. The opto-isolators provide the
maximum isolation between the logic
circuit and the analog output 1G ohm, 130pF, 500Vdc. Many applications do not require
this high
degree of isolation. The opto-isolators are conveniently mounted on a plug-in PC
board. Therefore,
the opto-isolators may be installed, in the field, when and if the need arises.
GPIB, GPIB Interface: Part No. KT-488 (optional). Opto-isolation
is included.
Construction: Two plug-in PC boards, field installable.
Extended 1 Year Warranty: Part No. EW501/J1,
EW501/J2.
ORDERING INFORMATION
BCD Format: Use 501/J-1.
Binary Format: Use 501/J-2.
GPIB Cable/Connector Assembly
1-Meter: Part No. 3045-1.
2-Meter: part No. 3045-2.
Binary Format: Use 501/J-2.
GPIB Cable/Connector Assembly
1-Meter: Part No. 3045-1.
2-Meter: part No. 3045-2.
Specifications and prices are subject to change without
notice.
Copyright ©
February 23, 2006 Krohn-Hite Corporation.
All rights reserved.
15 Jonathan Drive, Unit 4, Brockton, MA 02301-5566
U.S.A.
Tel: (508) 580-1660; Fax: (508) 583-8989; info@krohn-hite.com
