Model 523 Precision DC Power Calibrator

1、 General instructions for DC power calibrator

Krohn-HiteModel 523 Precision DC Power CalibratorIt is a highly stable and repeatable DC voltage and current source that provides N.I.S.T. traceable voltage and current for use in production, calibration laboratories, quality assurance and control departments, design laboratories, or anywhere requiring accurate voltage and current sources.

Using Krohn Hite's advanced reference, 523 can provide accurate and stable voltage ranging from ± 10nVdc to ± 110.9999Vdc within ± 4ppm for 90 days (± 8ppm can last for 1 year), and accurate current ranging from ± 10nA to ± 110.9999mA within ± 8ppm for 90 days (± 16ppm can last for 1 year). It has very low noise, with a measured noise of<7 μ Vrms in the bandwidth of 10Hz to 100kHz (<2 μ Vrms in the bandwidth of 0.1Hz to 10Hz).

523 has a user-friendly 7/2 digit display and all settings can be entered using a membrane keyboard. The output settings can be modified using the add/subtract increment function, multiply/divide function, and cursor control keys. The cursor control keys allow the cursor to be placed on any number to increase or decrease its value. Output 2-wire, 4-wire, and chassis grounding are achieved through a single touch key or GPIB interface bus. When needed, the protection function can place the output in safe mode. 523 can be set to 0V output, allowing output detection to maintain true 4-wire low impedance zero output. Before the range changes, it will also be quickly forced to zero to prevent any "sudden voltage changes".

Automatic Zero Offset Calibration (AZOC) returns any heat generated offset to a specific limit range and can be accessed through the front panel or GPIB interface bus. By using the KH523CAL testing and calibration software program and the HP3458 or Fluke 8508A digital voltmeter, non intrusive calibration can be performed in approximately 15 minutes.

523 provides storage for up to 31 output settings, which can be called at any time. The internal working temperature, serial number, last calibration date, and firmware version can all be displayed on the screen for quick access when needed. Error messages will be displayed when there is an error or when the range is exceeded.

2、 DC power calibrator optional

Model 523 Precision DC Power CalibratorProvides a voltage peak limit (523-11 option), which can limit the output voltage to a user-defined value ranging from 10Vdc to 100Vdc (the defined value can only be in increments of 1V); For example: 11V, 19V, 53V, etc., cannot be 11.2V, 19.5V, etc.)

A 100 Ω precision resistor (PCR100) is also provided, which is a precise and thermally stable 100 Ω resistor used during the current calibration of Model 523.

IIIDC power calibratorapplication

Krohn Hite's new modelModel 523 Precision DC Power CalibratorVery suitable for many applications that require extremely precise and stable DC voltage or DC current. Its cost is much lower than most power supplies in similar products, and 523 can be applied to any company's production line, calibration laboratory, quality assurance and quality control department, and design.

4、 DC calibrator specifications

5、 DC calibrator output

The constant internal operating temperature for the following specifications is 40 ℃± 1 ℃. HP3458A NPLC is set to 100 and runs in automatic calibration cycle (ACAL). The calibration of Model 523 is usually carried out at room temperature of 23 ℃± 1 ℃. The internal calibration temperature is saved during calibration and the current internal temperature can be displayed using the [TEMP] key.

The specifications for 90 days and 1 year are within 24 hours of automatic zero offset calibration (AZOC) cycle, with a constant internal operating temperature of 40 ℃± 1 ℃. The Automatic Zero Offset Calibration (AZOC) cycle considers the impact of internal DC zero drift.

Stable time:<10ms

Linear specification:<± 0.1ppm, relative to a normal linear voltage change of 10%, usually no measurement change.

Load specification for 4-wire operation:<± 0.1ppm, from no load to 100mA full load, usually without measurement changes. Measurements must be taken at the connection point of the sensing lead to the load.

Compliance voltage effect during current output: For a variation of<10nA, for a variation of 100V within the compliance voltage, the output current is<11.11112ma, which is equivalent to an output impedance of>10G Ω; <100na 100v=''>1G Ω output impedance.

Compliance voltage limit: can be set in units of 1V between 1V and 110V. The compliance voltage limit is approximately 15%+0.25V higher than the set limit.

Preheating time for cold start: within 5 ppm of the final value in 1 hour. Achieve rated accuracy and final value within 4 hours.

Peak output current: ± 110mA. The output is protected from damage by a current limiter. Output is not limited to short circuiting to ground.

Calibration: The calibration cycle for Model 523 is 1 year. Provides automatic zero offset calibration (AZOC), which can return any heat generated offset to the recognized limit and can be controlled through the front panel or accessed through the GPIB interface bus.

The Model 523 is designed for "overlay" calibration using the KH523CAL testing and calibration software program (license required). Using KH523CAL software with HP 3458A or Fluke 8508A digital voltmeter can perform almost interference free calibration in approximately 15 minutes. The calibration date and internal temperature are stored in memory and can be displayed on the screen or interacted with through the GPIB interface bus.

Temperature limit for "coverage calibration":

Internal temperature (T Cal): 40 ℃± 1 ℃, controlled by an internal heater.

Environmental temperature (T Amb): 18 ℃ to 28 ℃ to ensure the normal operation of the internal heater. Beyond these conditions, the accuracy significantly decreases.

Protection: Voltage mode, short circuit and overload protection. Current mode, open circuit protection, display information indication; Automatic recovery.

6、 GPIB programming

Switching time: usually 300ms

Sub devices: SH1, AH1, T6, SR1, RL1, PP1, DC1, DC1, DT1, CO, E1.

Line terminal: The GPIB OEI signal is always sent along with the last character on the line.

Speaker function: Allow querying Model 523 through the controller

7、 Terminal

The output terminals are installed on the front and rear panels. Only one set of terminals can be used at a time. Both terminal groups are configured for remote sensing output, as shown below:

High output and high sensitivity

Low output and low sensitivity

Shell grounding

8、 Conventional

Display: LCD, 7.5 bits. Display output settings and other related information.

Isolation: Power transformer to analog output, control logic to analog output, optoelectronic isolation.

9、 Security

Model 523 is used for measurement, control, and laboratory purposes, and can meet the following standard requirements for electrical equipment safety: IEC61010-1, EN61010-1.

10、 Electromagnetic compatibility

Radiation and immunity: EN61326-1, EMC, 61000-4-2; ESD， 61000-4-3； Radiation immunity, 61000-4-4; EFT， 61000-4-5； Surge, 61000-4-6; Conducted anti-interference, 61000-4-8; Magnetic field anti-interference, 61000-4-11; Voltage interruption EN61010-1. CE complies with Class B equipment.

11、 Mechanical specifications

Power requirements: Can choose 105-130 or 210-260V ac, single-phase, 50Hz to 60Hz, 60W.

Size and weight: Height 3.5 "(9cm), Width 14" (36cm), Depth 12.5 "(32.13cm); Net weight 12lbs (5.4kg), total weight 14lbs (6.3 kg).

Working temperature range: 0 ℃ to 50 ℃.

12、 Optional

523-11: Limit the peak output voltage to any user-defined value, from 10Vdc to 100Vdc. Factory installation only.

KH523CAL: Calibration and testing software, * automatic, used for calibrating Model 523.

PCR100:100 Ω precision current resistor.

RK-314: The rack installation kit allows the Model 523 to be installed into a 19 "rack space.

CAB005: Cable, 2-core shielded balanced wire, multi-layer double banana plug.

CAB018: Cable: Multi layer double banana plug

CAB023: CAB023 is a low heat EMF retractable banana plug jumper assembly. These low heat cables reduce thermal errors to a very low level, allowing for precise low voltage measurements. Each group includes 2 test leads (one black and one red).

CAB024 (hot selling): CAB024 is a low heat EMF shovel pin plug for low voltage measurement. These low heat cables greatly reduce thermal errors, allowing for accurate low voltage measurements. Each group includes 2 test leads (one black and one red).

CASE-2720B: Portable protective case, black, lightweight HPX resin, waterproof, with extendable pull rod and pulley.

13、 Accessories

Three terminal wire

Operation Manual

The manual is subject to change without prior notice.