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Practical Instrument Electronics

Model 535

4-20/10-50 mA/V Loop Calibrator

Operating Instructions

82 E. Main Street Suite 3.14 • Webster, NY 14580

Tel: 585-872-9350 • Fax: 585-872-2638

sales@piecal.com • http://www.piecal.com/

535-9002 Rev G 7/13/11

1-8

Basic Keypad Operations

EZ-Check™ Switch/EZ-Step™ Pushbutton

Slide the switch to select the user stored values for calibration

points. Press the button to adjust the output by the user

defined step size. Press and hold the button to activate the

auto step/ramp mode.

SOURCE/STEP SIZE Button

Press and release SOURCE/STEP SIZE to change source

modes. These are:

• Source Milliamps

• 2-Wire Transmitter Simulate

• Source Volts

Press and hold SOURCE/STEP SIZE to change step size.

ON/OFF Button

Press ON/OFF to turn the Model 535 on or off.

UNITS/STEP TIME Button

Press and release UNITS/STEP TIME to change how current is

displayed: either in milliamperes or % of 4-20/10-50 mA. Voltage

is only displayed in volts.

Press and hold UNITS/STEP TIME to change step size.

READ/SOAK TIME Button

Press and release READ/SOAK TIME to change read modes.

These are:

• Read Milliamps

• Power and Measure 2-Wire Transmitter

• Read Volts

Press and hold READ/SOAK TIME to change soak time.

†

STORE/CLEAR Button

In any source mode:

Press STORE/CLEAR to save the current reading in the EZ-

Check HI or LO position. The EZ-Check switch must be set to HI

or LO. The display will flash “STORED” to confirm.

In any read mode:

Press STORE/CLEAR to clear the values saved in the EZ-Check

HI and LO positions. The display will flash “CLEARED” to confirm.

‡

EZ-Dial™ Knob

Turn the EZ-Dial knob to adjust the output level. Press and turn

to adjust 100X faster.

Summary of content (8 pages)

PAGE 1
Model 535 4-20/10-50 mA/V Loop Calibrator Operating Instructions Practical Instrument Electronics Basic Keypad Operations j EZ-Check™ Switch/EZ-Step™ Pushbutton Slide the switch to select the user stored values for calibration points. Press the button to adjust the output by the user defined step size. Press and hold the button to activate the auto step/ramp mode.
PAGE 2
Model 535 Operating Instructions Model 535 Configuration Press the EZ-Dial Knob while turning the Model 535 on to access the configuration mode. Turn the EZ-Dial Knob to select configuration items. Press the EZ-Dial Knob to change configuration items. Turn the unit off or just wait approximately 8 seconds to exit the configuration mode. Auto Off - ON (default)/OFF Auto Off is ON, by default, to save battery life by turning the unit off after 30 minutes of inactivity.
PAGE 3
Model 535 Operating Instructions Auto Step/Ramp Press the EZ-Step pushbutton for more than one second to activate auto step/ramp mode. The Model 535 will automatically step by the selected EZ-Step size and time. Press the EZ-Step pushbutton again to deactivate auto step/ramp mode. The EZ-Step direction is indicated on the display ( or ). Press the EZ-Dial knob to change the step direction. The step direction can be changed while automatically stepping/ramping.
PAGE 4
Model 535 Operating Instructions Manual Step and Auto Step/Ramp Parameter To Change the EZ-Step Size: 1. Press and hold the SOURCE/STEP SIZE button for more than ¾ of a second. 2. The display will flash “EZ-STEP SIZE”. 3. Turn the EZ-Dial knob to select from 2 to 16 steps between the EZ-Check limits. 4. Turn the EZ-Dial clockwise past 16 steps to select continuous ramp mode. 5. Press the SOURCE/STEP SIZE button again to return to the normal display.
PAGE 5
Model 535 Operating Instructions Power and Measure 2 Wire Transmitter The Model 535 provides power to the process loop while displaying output current. Use this mode to test a transmitter’s ability to control loop current. Current limiting above 24 mA (52 mA if 10-50 range is selected) is indicated by a flashing “CURRENT LIMITED” display. Read Volts The Model 535 measures +/- 30 VDC with 4X overrange ability. The display flashes “OVERRANGE” when the 30 volt limit is exceeded.
PAGE 6
Model 535 Operating Instructions 2 Wire Transmitter Simulate Substitute the Model535 for a 2 wire transmitter. Use the EZ-Dial Knob and EZ-Check Switch to adjust loop current. At least 2 volts of loop power is required, else the display flashes “CHECK LOOP SUPPLY.” Source Volts The Model 532 sources 0.000-24.000 volts. This is useful for powering transmitters and receiver equipment. Use the EZ-Dial Knob and EZ-Check Switch to adjust output voltage.
PAGE 7
Model 535 Operating Instructions Common Specifications for all Current Modes: Ranges 0.000 to 24.000 mA, -25.00 to 125.00% of 4-20 mA 0.000 to 52.000 mA, -25.00 to 105.00% of 10-50 mA Accuracy ≤ ± (0.025 % of reading + 0.004 mA) Temperature Effect ≤ ± 50 ppm/°C of range Resolution 0.001 mA and 0.01 % Step/Ramp Timebase Accuracy 0.01% of 4.
PAGE 8
Model 535 Operating Instructions Read Voltage Specifications: Range: 0.00 to 30.00 VDC (with 4X over range) Resolutions 0.01 VDC Temperature Effect ≤ ± 200 ppm/°C of range Input Resistance ≥ 1 MΩ Accuracy 0.00 to 30.00 VDC ≤ ± (0.1 % of reading ±0.1 V) Source Voltage Specifications: Source Range: 0.000 to 24.000 VDC Output Resistance ≤0.3 Ω Source Current ≥20.000 mA Accuracy ≤±(0.025%RDG + 0.